ListView.java revision 2e6fc8ca5696367a680656f73c1b9b95648eb6fa
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.widget; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 195fade8c69aef621312232ef0647502d7a63990b9Romain Guyimport android.os.Trace; 20fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport com.android.internal.R; 214e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brownimport com.android.internal.util.Predicate; 22fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport com.google.android.collect.Lists; 23fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 25499cb9f516062b654952d282f211bee44c31a3c2Winson Chungimport android.content.Intent; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Canvas; 288f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guyimport android.graphics.Paint; 29fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.graphics.PixelFormat; 30fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.graphics.Rect; 31fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.graphics.drawable.Drawable; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 3330ee76cf05f785bbf819b71954242c835c597ce1alanvimport android.util.MathUtils; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.SparseBooleanArray; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.FocusFinder; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.KeyEvent; 37fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.view.SoundEffectConstants; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewDebug; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 423e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viveretteimport android.view.ViewRootImpl; 4375986cf9bc57ef11ad70f36fb77fbbf5d63af6ecsvetoslavganovimport android.view.accessibility.AccessibilityEvent; 448a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganovimport android.view.accessibility.AccessibilityNodeInfo; 455b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viveretteimport android.view.accessibility.AccessibilityNodeInfo.CollectionInfo; 465b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viveretteimport android.view.accessibility.AccessibilityNodeInfo.CollectionItemInfo; 473e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viveretteimport android.view.accessibility.AccessibilityNodeProvider; 48499cb9f516062b654952d282f211bee44c31a3c2Winson Chungimport android.widget.RemoteViews.RemoteView; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.ArrayList; 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Implementation Notes: 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Some terminology: 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * index - index of the items that are currently visible 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position - index of the items in the cursor 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A view that shows items in a vertically scrolling list. The items 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * come from the {@link ListAdapter} associated with this view. 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 664c359b76f9a030f92a302ba74a528faa170bad4eScott Main * <p>See the <a href="{@docRoot}guide/topics/ui/layout/listview.html">List View</a> 674c359b76f9a030f92a302ba74a528faa170bad4eScott Main * guide.</p> 6841ec65355bd6ded652769725b276d47c54a0d913Scott Main * 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_entries 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_divider 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_dividerHeight 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_headerDividersEnabled 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_footerDividersEnabled 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 75499cb9f516062b654952d282f211bee44c31a3c2Winson Chung@RemoteView 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ListView extends AbsListView { 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Used to indicate a no preference for a position type. 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final int NO_POSITION = -1; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When arrow scrolling, ListView will never scroll more than this factor 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * times the height of the list. 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final float MAX_SCROLL_FACTOR = 0.33f; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When arrow scrolling, need a certain amount of pixels to preview next 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. This is usually the fading edge, but if that is small enough, 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * we want to make sure we preview at least this many pixels. 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int MIN_SCROLL_PREVIEW_PIXELS = 2; 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A class that represents a fixed view in a list, for example a header at the top 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or a footer at the bottom. 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public class FixedViewInfo { 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** The view to add to the list */ 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public View view; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** The data backing the view. This is returned from {@link ListAdapter#getItem(int)}. */ 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Object data; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** <code>true</code> if the fixed view should be selectable in the list */ 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSelectable; 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrayList<FixedViewInfo> mHeaderViewInfos = Lists.newArrayList(); 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrayList<FixedViewInfo> mFooterViewInfos = Lists.newArrayList(); 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Drawable mDivider; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mDividerHeight; 113fb60386b46d0c6216c765c10bd33ac42ca780917Adam Cohen 114637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Drawable mOverScrollHeader; 115637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Drawable mOverScrollFooter; 116637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 11724443ea3992e372e47daa50266b0f2ec38cac388Romain Guy private boolean mIsCacheColorOpaque; 11824443ea3992e372e47daa50266b0f2ec38cac388Romain Guy private boolean mDividerIsOpaque; 11924443ea3992e372e47daa50266b0f2ec38cac388Romain Guy 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mHeaderDividersEnabled; 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mFooterDividersEnabled; 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mAreAllItemsSelectable = true; 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mItemsCanFocus = false; 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // used for temporary calculations. 128c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project private final Rect mTempRect = new Rect(); 129a02903fbee6725563da4472bd120f844e9d5518cRomain Guy private Paint mDividerPaint; 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // the single allocated result per list view; kinda cheesey but avoids 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // allocating these thingies too often. 1339c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy private final ArrowScrollFocusResult mArrowScrollFocusResult = new ArrowScrollFocusResult(); 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1359bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell // Keeps focused children visible through resizes 1369bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private FocusSelector mFocusSelector; 1378350f7dbc3a62211b2891f35911e4073d24c4cc5Adam Powell 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context) { 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context, AttributeSet attrs) { 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.listViewStyle); 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 146617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette public ListView(Context context, AttributeSet attrs, int defStyleAttr) { 147617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette this(context, attrs, defStyleAttr, 0); 148617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette } 149617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette 150617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette public ListView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 151617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette super(context, attrs, defStyleAttr, defStyleRes); 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 153617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette final TypedArray a = context.obtainStyledAttributes( 154617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette attrs, com.android.internal.R.styleable.ListView, defStyleAttr, defStyleRes); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CharSequence[] entries = a.getTextArray( 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView_entries); 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entries != null) { 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setAdapter(new ArrayAdapter<CharSequence>(context, 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.layout.simple_list_item_1, entries)); 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Drawable d = a.getDrawable(com.android.internal.R.styleable.ListView_divider); 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (d != null) { 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If a divider is specified use its intrinsic height for divider height 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDivider(d); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 168bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 169637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable osHeader = a.getDrawable( 170637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell com.android.internal.R.styleable.ListView_overScrollHeader); 171637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (osHeader != null) { 172637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell setOverscrollHeader(osHeader); 173637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 174637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 175637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable osFooter = a.getDrawable( 176637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell com.android.internal.R.styleable.ListView_overScrollFooter); 177637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (osFooter != null) { 178637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell setOverscrollFooter(osFooter); 179637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 180637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Use the height specified, zero being the default 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = a.getDimensionPixelSize( 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView_dividerHeight, 0); 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dividerHeight != 0) { 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDividerHeight(dividerHeight); 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderDividersEnabled = a.getBoolean(R.styleable.ListView_headerDividersEnabled, true); 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterDividersEnabled = a.getBoolean(R.styleable.ListView_footerDividersEnabled, true); 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount a list view will scroll in response to 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mBottom - mTop)); 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Make sure views are touching the top or bottom edge, as appropriate for 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * our gravity 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void adjustViewsUpOrDown() { 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta; 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Uh-oh -- we came up short. Slide all views up to make them 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // align with the top 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = getChildAt(0); 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = child.getTop() - mListPadding.top; 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition != 0) { 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's OK to have some space above the first item if it is 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // part of the vertical spacing 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta -= mDividerHeight; 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta < 0) { 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We only are looking to see if we are too low, not too high 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = 0; 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we are too high, slide all views down to align with bottom 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = getChildAt(childCount - 1); 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = child.getBottom() - (getHeight() - mListPadding.bottom); 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition + childCount < mItemCount) { 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's OK to have some space below the last item if it is 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // part of the vertical spacing 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta += mDividerHeight; 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = 0; 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(-delta); 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25072e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * Add a fixed view to appear at the top of the list. If this method is 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 25472e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * Note: When first introduced, this method could only be called before 25572e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with 256e8222dddaf2e3da14380101e818d4254899e0c0dChet Haase * {@link android.os.Build.VERSION_CODES#KITKAT}, this method may be 25772e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * called at any time. If the ListView's adapter does not extend 25872e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * {@link HeaderViewListAdapter}, it will be wrapped with a supporting 25972e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * instance of {@link WrapperListAdapter}. 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param data Data to associate with this view 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isSelectable whether the item is selectable 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addHeaderView(View v, Object data, boolean isSelectable) { 26672e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette final FixedViewInfo info = new FixedViewInfo(); 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.view = v; 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.data = data; 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.isSelectable = isSelectable; 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderViewInfos.add(info); 27120cc605b69a017316112929666255226c184a376Alan Viverette mAreAllItemsSelectable &= isSelectable; 27222c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen 27372e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette // Wrap the adapter if it wasn't already wrapped. 27472e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette if (mAdapter != null) { 27572e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette if (!(mAdapter instanceof HeaderViewListAdapter)) { 27672e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette mAdapter = new HeaderViewListAdapter(mHeaderViewInfos, mFooterViewInfos, mAdapter); 27772e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette } 27872e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette 27972e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette // In the case of re-adding a header view, or adding one later on, 28072e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette // we need to notify the observer. 28172e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette if (mDataSetObserver != null) { 28272e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette mDataSetObserver.onChanged(); 28372e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette } 28422c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen } 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the top of the list. If addHeaderView is 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 29272e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * Note: When first introduced, this method could only be called before 29372e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with 294e8222dddaf2e3da14380101e818d4254899e0c0dChet Haase * {@link android.os.Build.VERSION_CODES#KITKAT}, this method may be 29572e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * called at any time. If the ListView's adapter does not extend 29672e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * {@link HeaderViewListAdapter}, it will be wrapped with a supporting 29772e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * instance of {@link WrapperListAdapter}. 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addHeaderView(View v) { 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addHeaderView(v, null, true); 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getHeaderViewsCount() { 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mHeaderViewInfos.size(); 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes a previously-added header view. 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to remove 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the view was removed, false if the view was not a header 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * view 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean removeHeaderView(View v) { 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mHeaderViewInfos.size() > 0) { 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean result = false; 320247a0f0a16f956c463644f732dacb6c8d0979ba3Adam Powell if (mAdapter != null && ((HeaderViewListAdapter) mAdapter).removeHeader(v)) { 32122c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen if (mDataSetObserver != null) { 32222c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen mDataSetObserver.onChanged(); 32322c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen } 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result = true; 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeFixedViewInfo(v, mHeaderViewInfos); 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void removeFixedViewInfo(View v, ArrayList<FixedViewInfo> where) { 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; ++i) { 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FixedViewInfo info = where.get(i); 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (info.view == v) { 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project where.remove(i); 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the bottom of the list. If addFooterView is 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 34872e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * Note: When first introduced, this method could only be called before 34972e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with 350e8222dddaf2e3da14380101e818d4254899e0c0dChet Haase * {@link android.os.Build.VERSION_CODES#KITKAT}, this method may be 35172e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * called at any time. If the ListView's adapter does not extend 35272e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * {@link HeaderViewListAdapter}, it will be wrapped with a supporting 35372e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * instance of {@link WrapperListAdapter}. 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param data Data to associate with this view 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isSelectable true if the footer view can be selected 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addFooterView(View v, Object data, boolean isSelectable) { 36072e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette final FixedViewInfo info = new FixedViewInfo(); 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.view = v; 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.data = data; 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.isSelectable = isSelectable; 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterViewInfos.add(info); 36520cc605b69a017316112929666255226c184a376Alan Viverette mAreAllItemsSelectable &= isSelectable; 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36772e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette // Wrap the adapter if it wasn't already wrapped. 36872e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette if (mAdapter != null) { 36972e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette if (!(mAdapter instanceof HeaderViewListAdapter)) { 37072e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette mAdapter = new HeaderViewListAdapter(mHeaderViewInfos, mFooterViewInfos, mAdapter); 37172e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette } 37272e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette 37372e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette // In the case of re-adding a footer view, or adding one later on, 37472e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette // we need to notify the observer. 37572e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette if (mDataSetObserver != null) { 37672e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette mDataSetObserver.onChanged(); 37772e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette } 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 38272e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * Add a fixed view to appear at the bottom of the list. If addFooterView is 38372e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * called more than once, the views will appear in the order they were 38472e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * added. Views added using this call can take focus if they want. 38572e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * <p> 38672e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * Note: When first introduced, this method could only be called before 38772e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with 388e8222dddaf2e3da14380101e818d4254899e0c0dChet Haase * {@link android.os.Build.VERSION_CODES#KITKAT}, this method may be 38972e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * called at any time. If the ListView's adapter does not extend 39072e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * {@link HeaderViewListAdapter}, it will be wrapped with a supporting 39172e2f2a94049642454e960f344dc6feed4ec1dc9Alan Viverette * instance of {@link WrapperListAdapter}. 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addFooterView(View v) { 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addFooterView(v, null, true); 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getFooterViewsCount() { 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFooterViewInfos.size(); 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes a previously-added footer view. 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to remove 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * true if the view was removed, false if the view was not a footer view 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean removeFooterView(View v) { 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFooterViewInfos.size() > 0) { 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean result = false; 414247a0f0a16f956c463644f732dacb6c8d0979ba3Adam Powell if (mAdapter != null && ((HeaderViewListAdapter) mAdapter).removeFooter(v)) { 41522c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen if (mDataSetObserver != null) { 41622c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen mDataSetObserver.onChanged(); 41722c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen } 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result = true; 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeFixedViewInfo(v, mFooterViewInfos); 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the adapter currently in use in this ListView. The returned adapter 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * might not be the same adapter passed to {@link #setAdapter(ListAdapter)} but 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * might be a {@link WrapperListAdapter}. 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The adapter currently used to display data in this ListView. 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setAdapter(ListAdapter) 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListAdapter getAdapter() { 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mAdapter; 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 441499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * Sets up this AbsListView to use a remote views adapter which connects to a RemoteViewsService 442499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * through the specified intent. 443499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * @param intent the intent used to identify the RemoteViewsService for the adapter to connect to. 444499cb9f516062b654952d282f211bee44c31a3c2Winson Chung */ 445499cb9f516062b654952d282f211bee44c31a3c2Winson Chung @android.view.RemotableViewMethod 446499cb9f516062b654952d282f211bee44c31a3c2Winson Chung public void setRemoteViewsAdapter(Intent intent) { 447499cb9f516062b654952d282f211bee44c31a3c2Winson Chung super.setRemoteViewsAdapter(intent); 448499cb9f516062b654952d282f211bee44c31a3c2Winson Chung } 449499cb9f516062b654952d282f211bee44c31a3c2Winson Chung 450499cb9f516062b654952d282f211bee44c31a3c2Winson Chung /** 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the data behind this ListView. 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The adapter passed to this method may be wrapped by a {@link WrapperListAdapter}, 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * depending on the ListView features currently in use. For instance, adding 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * headers and/or footers will cause the adapter to be wrapped. 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param adapter The ListAdapter which is responsible for maintaining the 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * data backing this list and for producing a view to represent an 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * item in that data set. 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #getAdapter() 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setAdapter(ListAdapter adapter) { 465df36b0579e1e550de3d66a20362717e49b23235cRomain Guy if (mAdapter != null && mDataSetObserver != null) { 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter.unregisterDataSetObserver(mDataSetObserver); 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.clear(); 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mHeaderViewInfos.size() > 0|| mFooterViewInfos.size() > 0) { 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter = new HeaderViewListAdapter(mHeaderViewInfos, mFooterViewInfos, adapter); 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter = adapter; 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldSelectedPosition = INVALID_POSITION; 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldSelectedRowId = INVALID_ROW_ID; 480f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell 481f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell // AbsListView#setAdapter will update choice mode states. 482f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell super.setAdapter(adapter); 483f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter != null) { 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAreAllItemsSelectable = mAdapter.areAllItemsEnabled(); 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldItemCount = mItemCount; 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemCount = mAdapter.getCount(); 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkFocus(); 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataSetObserver = new AdapterDataSetObserver(); 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter.registerDataSetObserver(mDataSetObserver); 4929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.setViewTypeCount(mAdapter.getViewTypeCount()); 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position; 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mStackFromBottom) { 4979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(mItemCount - 1, false); 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(0, true); 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing selected 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAreAllItemsSelectable = true; 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkFocus(); 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing selected 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 5169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The list is empty. Clear everything out. 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void resetList() { 5232e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy // The parent's resetList() will remove all views from the layout so we need to 5242e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy // cleanup the state of our footers and headers 5252e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy clearRecycledState(mHeaderViewInfos); 5262e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy clearRecycledState(mFooterViewInfos); 5272e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.resetList(); 5292e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_NORMAL; 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5332e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy private void clearRecycledState(ArrayList<FixedViewInfo> infos) { 5342e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy if (infos != null) { 5352e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy final int count = infos.size(); 5362e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5372e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy for (int i = 0; i < count; i++) { 5382e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy final View child = infos.get(i).view; 5392e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy final LayoutParams p = (LayoutParams) child.getLayoutParams(); 5402e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy if (p != null) { 5412e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy p.recycledHeaderFooter = false; 5422e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5432e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5442e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5452e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5462e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the list needs to show the top fading edge 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean showingTopFadingEdge() { 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mScrollY + mListPadding.top; 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mFirstPosition > 0) || (getChildAt(0).getTop() > listTop); 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the list needs to show the bottom fading edge 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean showingBottomFadingEdge() { 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomOfBottomChild = getChildAt(childCount - 1).getBottom(); 5619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePosition = mFirstPosition + childCount - 1; 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = mScrollY + getHeight() - mListPadding.bottom; 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (lastVisiblePosition < mItemCount - 1) 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || (bottomOfBottomChild < listBottom); 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) { 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int rectTopWithinChild = rect.top; 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset so rect is in coordinates of the this view 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rect.offset(child.getLeft(), child.getTop()); 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rect.offset(-child.getScrollX(), -child.getScrollY()); 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int height = getHeight(); 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listUnfadedTop = getScrollY(); 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listUnfadedBottom = listUnfadedTop + height; 5829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int fadingEdge = getVerticalFadingEdgeLength(); 5839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (showingTopFadingEdge()) { 5859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for top fading edge as long as rect isn't at very top 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mSelectedPosition > 0) || (rectTopWithinChild > fadingEdge)) { 5879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listUnfadedTop += fadingEdge; 5889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomOfBottomChild = getChildAt(childCount - 1).getBottom(); 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (showingBottomFadingEdge()) { 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for bottom fading edge as long as rect isn't at very bottom 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mSelectedPosition < mItemCount - 1) 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || (rect.bottom < (bottomOfBottomChild - fadingEdge))) { 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listUnfadedBottom -= fadingEdge; 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollYDelta = 0; 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.bottom > listUnfadedBottom && rect.top > listUnfadedTop) { 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to MOVE DOWN to get it in view: move down just enough so 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 6109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.top - listUnfadedTop); 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at bottom of screen 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.bottom - listUnfadedBottom); 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our children 6189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToBottom = bottomOfBottomChild - listUnfadedBottom; 6199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.min(scrollYDelta, distanceToBottom); 6209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.top < listUnfadedTop && rect.bottom < listUnfadedBottom) { 6219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to MOVE UP to get it in view: move up just enough so that 6229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (listUnfadedBottom - rect.bottom); 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at top 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (listUnfadedTop - rect.top); 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the top our children 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int top = getChildAt(0).getTop(); 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int deltaToTop = top - listUnfadedTop; 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.max(scrollYDelta, deltaToTop); 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = scrollYDelta != 0; 6409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 6419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollListItemsBy(-scrollYDelta); 642079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(INVALID_POSITION, child); 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = child.getTop(); 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void fillGap(boolean down) { 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = getChildCount(); 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down) { 6568c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int paddingTop = 0; 6578c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 6588c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell paddingTop = getListPaddingTop(); 6598c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int startOffset = count > 0 ? getChildAt(count - 1).getBottom() + mDividerHeight : 6618c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell paddingTop; 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mFirstPosition + count, startOffset); 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6658c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int paddingBottom = 0; 6668c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 6678c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell paddingBottom = getListPaddingBottom(); 6688c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int startOffset = count > 0 ? getChildAt(0).getTop() - mDividerHeight : 6708c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell getHeight() - paddingBottom; 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mFirstPosition - 1, startOffset); 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from pos down to the end of the list view. 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pos The first position to put in the list 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextTop The location where the top of the item associated with pos 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should be drawn 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected, if it happens to be in the 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * range that we draw. 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillDown(int pos, int nextTop) { 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = null; 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6908c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int end = (mBottom - mTop); 6918c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 6928c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell end -= mListPadding.bottom; 6938c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (nextTop < end && pos < mItemCount) { 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is this the selected item? 6979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected = pos == mSelectedPosition; 6989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = makeAndAddView(pos, nextTop, true, mListPadding.left, selected); 6999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextTop = child.getBottom() + mDividerHeight; 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selected) { 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = child; 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pos++; 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 707b967392e0170af8cfd8053fd43fcdf8c46f703e9Adam Cohen setVisibleRangeHint(mFirstPosition, mFirstPosition + getChildCount() - 1); 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedView; 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from pos up to the top of the list view. 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pos The first position to put in the list 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextBottom The location where the bottom of the item associated 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * with pos should be drawn 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillUp(int pos, int nextBottom) { 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = null; 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7248c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int end = 0; 7258c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 7268c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell end = mListPadding.top; 7278c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (nextBottom > end && pos >= 0) { 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is this the selected item? 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected = pos == mSelectedPosition; 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = makeAndAddView(pos, nextBottom, false, mListPadding.left, selected); 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextBottom = child.getTop() - mDividerHeight; 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selected) { 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = child; 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pos--; 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = pos + 1; 741b967392e0170af8cfd8053fd43fcdf8c46f703e9Adam Cohen setVisibleRangeHint(mFirstPosition, mFirstPosition + getChildCount() - 1); 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedView; 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from top to bottom, starting with mFirstPosition 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextTop The location where the top of the first item should be 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drawn 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromTop(int nextTop) { 7549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = Math.min(mFirstPosition, mSelectedPosition); 7559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = Math.min(mFirstPosition, mItemCount - 1); 7569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition < 0) { 7579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = 0; 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return fillDown(mFirstPosition, nextTop); 7609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Put mSelectedPosition in the middle of the screen and then build up and 7659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down from there. This method forces mSelectedPosition to the center. 7669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Top of the area in which children can be drawn, as 7689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * measured in pixels 7699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Bottom of the area in which children can be drawn, 7709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * as measured in pixels 7719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Currently selected view 7729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromMiddle(int childrenTop, int childrenBottom) { 7749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = childrenBottom - childrenTop; 7759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = reconcileSelectedPosition(); 7779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel = makeAndAddView(position, childrenTop, true, 7799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, true); 7809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = position; 7819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selHeight = sel.getMeasuredHeight(); 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selHeight <= height) { 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom((height - selHeight) / 2); 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, position); 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 7909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Once the selected view as been placed, fill up the visible area above and 8009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * below it. 8019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param sel The selected view 8039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The position corresponding to sel 8049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void fillAboveAndBelow(View sel, int position) { 8069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(position - 1, sel.getTop() - dividerHeight); 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(position + 1, sel.getBottom() + dividerHeight); 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(position + 1, sel.getBottom() + dividerHeight); 8139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(position - 1, sel.getTop() - dividerHeight); 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the grid based on positioning the new selection at a specific 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * location. The selection may be moved so that it does not intersect the 8229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * faded edges. The grid is then filled upwards and downwards from there. 8239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedTop Where the selected item should be 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Where to start drawing children 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Last pixel where children can be drawn 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that currently has selection 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromSelection(int selectedTop, int childrenTop, int childrenBottom) { 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdgeLength = getVerticalFadingEdgeLength(); 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedPosition = mSelectedPosition; 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int topSelectionPixel = getTopSelectionPixel(childrenTop, fadingEdgeLength, 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomSelectionPixel = getBottomSelectionPixel(childrenBottom, fadingEdgeLength, 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, selectedTop, true, mListPadding.left, true); 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends below the bottom of the list 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getBottom() > bottomSelectionPixel) { 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available above the selection into which we can scroll 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // upwards 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceAbove = sel.getTop() - topSelectionPixel; 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the bottom of the selected item 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // fully into view 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceBelow = sel.getBottom() - bottomSelectionPixel; 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int offset = Math.min(spaceAbove, spaceBelow); 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now offset the selected item to get it into view 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(-offset); 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (sel.getTop() < topSelectionPixel) { 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the top of the selected item fully 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // into view 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceAbove = topSelectionPixel - sel.getTop(); 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available below the selection into which we can scroll 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // downwards 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceBelow = bottomSelectionPixel - sel.getBottom(); 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int offset = Math.min(spaceAbove, spaceBelow); 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Offset the selected item to get it into view 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(offset); 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calculate the bottom-most pixel we can draw the selection into 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Bottom pixel were children can be drawn 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fadingEdgeLength Length of the fading edge in pixels, if present 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedPosition The position that will be selected 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The bottom-most pixel we can draw the selection into 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getBottomSelectionPixel(int childrenBottom, int fadingEdgeLength, 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedPosition) { 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomSelectionPixel = childrenBottom; 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedPosition != mItemCount - 1) { 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomSelectionPixel -= fadingEdgeLength; 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bottomSelectionPixel; 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calculate the top-most pixel we can draw the selection into 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Top pixel were children can be drawn 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fadingEdgeLength Length of the fading edge in pixels, if present 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedPosition The position that will be selected 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The top-most pixel we can draw the selection into 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getTopSelectionPixel(int childrenTop, int fadingEdgeLength, int selectedPosition) { 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first pixel we can draw the selection into 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topSelectionPixel = childrenTop; 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedPosition > 0) { 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topSelectionPixel += fadingEdgeLength; 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return topSelectionPixel; 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 916499cb9f516062b654952d282f211bee44c31a3c2Winson Chung /** 917499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * Smoothly scroll to the specified adapter position. The view will 918499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * scroll such that the indicated position is displayed. 919499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * @param position Scroll to this adapter position. 920499cb9f516062b654952d282f211bee44c31a3c2Winson Chung */ 921499cb9f516062b654952d282f211bee44c31a3c2Winson Chung @android.view.RemotableViewMethod 922499cb9f516062b654952d282f211bee44c31a3c2Winson Chung public void smoothScrollToPosition(int position) { 923499cb9f516062b654952d282f211bee44c31a3c2Winson Chung super.smoothScrollToPosition(position); 924499cb9f516062b654952d282f211bee44c31a3c2Winson Chung } 925499cb9f516062b654952d282f211bee44c31a3c2Winson Chung 926499cb9f516062b654952d282f211bee44c31a3c2Winson Chung /** 927499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * Smoothly scroll to the specified adapter position offset. The view will 928499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * scroll such that the indicated position is displayed. 929499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * @param offset The amount to offset from the adapter position to scroll to. 930499cb9f516062b654952d282f211bee44c31a3c2Winson Chung */ 931499cb9f516062b654952d282f211bee44c31a3c2Winson Chung @android.view.RemotableViewMethod 932499cb9f516062b654952d282f211bee44c31a3c2Winson Chung public void smoothScrollByOffset(int offset) { 933499cb9f516062b654952d282f211bee44c31a3c2Winson Chung super.smoothScrollByOffset(offset); 934499cb9f516062b654952d282f211bee44c31a3c2Winson Chung } 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list based on positioning the new selection relative to the old 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selection. The new selection will be placed at, above, or below the 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * location of the new selection depending on how the selection is moving. 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The selection will then be pinned to the visible part of the screen, 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * excluding the edges that are faded. The list is then filled upwards and 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * downwards from there. 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param oldSel The old selected view. Useful for trying to put the new 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selection in the same place 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newSel The view that is to become selected. Useful for trying to 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * put the new selection in the same place 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta Which way we are moving 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Where to start drawing children 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Last pixel where children can be drawn 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that currently has selection 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View moveSelection(View oldSel, View newSel, int delta, int childrenTop, 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenBottom) { 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdgeLength = getVerticalFadingEdgeLength(); 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedPosition = mSelectedPosition; 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int topSelectionPixel = getTopSelectionPixel(childrenTop, fadingEdgeLength, 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomSelectionPixel = getBottomSelectionPixel(childrenTop, fadingEdgeLength, 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 1: Scrolling down. 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Before After 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | A | | A | 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | 1 | => +-------+ 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ | B | 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | B | | 2 | 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Try to keep the top of the previously selected item where it was. 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * oldSel = A 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * sel = B 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Put oldSel (A) where it belongs 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel = makeAndAddView(selectedPosition - 1, oldSel.getTop(), true, 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, false); 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now put the new selection (B) below that 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldSel.getBottom() + dividerHeight, true, 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, true); 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends below the bottom of the list 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getBottom() > bottomSelectionPixel) { 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available above the selection into which we can scroll upwards 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceAbove = sel.getTop() - topSelectionPixel; 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the bottom of the selected item fully into view 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceBelow = sel.getBottom() - bottomSelectionPixel; 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't scroll more than half the height of the list 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int halfVerticalSpace = (childrenBottom - childrenTop) / 2; 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset = Math.min(spaceAbove, spaceBelow); 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset = Math.min(offset, halfVerticalSpace); 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We placed oldSel, so offset that item 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel.offsetTopAndBottom(-offset); 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now offset the selected item to get it into view 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(-offset); 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mSelectedPosition - 2, sel.getTop() - dividerHeight); 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mSelectedPosition + 1, sel.getBottom() + dividerHeight); 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mSelectedPosition + 1, sel.getBottom() + dividerHeight); 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mSelectedPosition - 2, sel.getTop() - dividerHeight); 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (delta < 0) { 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 2: Scrolling up. 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Before After 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | A | | A | 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ => | 1 | 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | B | +-------+ 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | 2 | | B | 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Try to keep the top of the item about to become selected where it was. 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * newSel = A 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * olSel = B 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSel != null) { 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Try to position the top of newSel (A) where it was before it was selected 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, newSel.getTop(), true, mListPadding.left, 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project true); 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If (A) was not on screen and so did not have a view, position 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it above the oldSel (B) 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldSel.getTop(), false, mListPadding.left, 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project true); 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends above the top of the list 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getTop() < topSelectionPixel) { 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the top of the selected item fully into view 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceAbove = topSelectionPixel - sel.getTop(); 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available below the selection into which we can scroll downwards 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceBelow = bottomSelectionPixel - sel.getBottom(); 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't scroll more than half the height of the list 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int halfVerticalSpace = (childrenBottom - childrenTop) / 2; 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset = Math.min(spaceAbove, spaceBelow); 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset = Math.min(offset, halfVerticalSpace); 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Offset the selected item to get it into view 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(offset); 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldTop = oldSel.getTop(); 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 3: Staying still 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldTop, true, mListPadding.left, true); 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We're staying still... 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (oldTop < childrenTop) { 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... but the top of the old selection was off screen. 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (This can happen if the data changes size out from under us) 10909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newBottom = sel.getBottom(); 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newBottom < childrenTop + 20) { 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Not enough visible -- bring it onscreen 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(childrenTop - sel.getTop()); 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 11029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11049bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private class FocusSelector implements Runnable { 11059bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private int mPosition; 11069bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private int mPositionTop; 11079bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 11089bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell public FocusSelector setup(int position, int top) { 11099bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell mPosition = position; 11109bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell mPositionTop = top; 11119bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell return this; 11129bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11139bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 11149bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell public void run() { 11159bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell setSelectionFromTop(mPosition, mPositionTop); 11169bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11179bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11189bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 11199bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell @Override 11209bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell protected void onSizeChanged(int w, int h, int oldw, int oldh) { 11219bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell if (getChildCount() > 0) { 11229bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell View focusedChild = getFocusedChild(); 11239bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell if (focusedChild != null) { 11249bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int childPosition = mFirstPosition + indexOfChild(focusedChild); 11259bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int childBottom = focusedChild.getBottom(); 11269bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int offset = Math.max(0, childBottom - (h - mPaddingTop)); 11279bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int top = focusedChild.getTop() - offset; 11289bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell if (mFocusSelector == null) { 11299bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell mFocusSelector = new FocusSelector(); 11309bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11319bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell post(mFocusSelector.setup(childPosition, top)); 11329bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11339bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11349bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell super.onSizeChanged(w, h, oldw, oldh); 11359bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11369bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Sets up mListPadding 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int widthMode = MeasureSpec.getMode(widthMeasureSpec); 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int heightMode = MeasureSpec.getMode(heightMeasureSpec); 11449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int widthSize = MeasureSpec.getSize(widthMeasureSpec); 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int heightSize = MeasureSpec.getSize(heightMeasureSpec); 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidth = 0; 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeight = 0; 1149189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn int childState = 0; 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemCount = mAdapter == null ? 0 : mAdapter.getCount(); 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && (widthMode == MeasureSpec.UNSPECIFIED || 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightMode == MeasureSpec.UNSPECIFIED)) { 115421875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy final View child = obtainView(0, mIsScrap); 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureScrapChild(child, 0, widthMeasureSpec); 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childWidth = child.getMeasuredWidth(); 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeight = child.getMeasuredHeight(); 1160189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn childState = combineMeasuredStates(childState, child.getMeasuredState()); 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11629c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy if (recycleOnMeasure() && mRecycler.shouldRecycleViewType( 11639c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy ((LayoutParams) child.getLayoutParams()).viewType)) { 1164079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn mRecycler.addScrapView(child, -1); 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (widthMode == MeasureSpec.UNSPECIFIED) { 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project widthSize = mListPadding.left + mListPadding.right + childWidth + 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getVerticalScrollbarWidth(); 1171189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn } else { 1172189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn widthSize |= (childState&MEASURED_STATE_MASK); 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.UNSPECIFIED) { 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightSize = mListPadding.top + mListPadding.bottom + childHeight + 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getVerticalFadingEdgeLength() * 2; 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.AT_MOST) { 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // TODO: after first layout we should maybe start at the first visible position, not 0 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightSize = measureHeightOfChildren(widthMeasureSpec, 0, NO_POSITION, heightSize, -1); 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1185189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn setMeasuredDimension(widthSize , heightSize); 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mWidthMeasureSpec = widthMeasureSpec; 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureScrapChild(View child, int position, int widthMeasureSpec) { 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LayoutParams p = (LayoutParams) child.getLayoutParams(); 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 1192aebd28f729fa28016d70551d0372ab7fcd56ee1aAdam Powell p = (AbsListView.LayoutParams) generateDefaultLayoutParams(); 11934df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project child.setLayoutParams(p); 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p.viewType = mAdapter.getItemViewType(position); 11960bf88594c43ced48d862d122e3e84967b3b63658Romain Guy p.forceAdd = true; 11979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(widthMeasureSpec, 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 12029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 12039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 12049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 12069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 12089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True to recycle the views used to measure this ListView in 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * UNSPECIFIED/AT_MOST modes, false otherwise. 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1215bea95162ca25bd00b0479d93739b6283795c3986Konstantin Lopyrev @ViewDebug.ExportedProperty(category = "list") 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean recycleOnMeasure() { 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Measures the height of the given range of children (inclusive) and 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returns the height with this ListView's padding and divider heights 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * included. If maxHeight is provided, the measuring will stop when the 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * current height reaches maxHeight. 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param widthMeasureSpec The width measure spec to be given to a child's 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link View#measure(int, int)}. 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param startPosition The position of the first child to be shown. 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param endPosition The (inclusive) position of the last child to be 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * shown. Specify {@link #NO_POSITION} if the last child should be 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the last available child from the adapter. 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param maxHeight The maximum height that will be returned (if all the 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children don't fit in this value, this value will be 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returned). 12359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param disallowPartialChildPosition In general, whether the returned 12369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * height should only contain entire children. This is more 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * powerful--it is the first inclusive position at which partial 12389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children will not be allowed. Example: it looks nice to have 12399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least 3 completely visible children, and in portrait this 12409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will most likely fit; but in landscape there could be times 12419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * when even 2 children can not be completely shown, so a value 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of 2 (remember, inclusive) would be good (assuming 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * startPosition is 0). 12449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The height of this ListView with the given children. 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int measureHeightOfChildren(int widthMeasureSpec, int startPosition, int endPosition, 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxHeight, int disallowPartialChildPosition) { 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = mAdapter; 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter == null) { 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mListPadding.top + mListPadding.bottom; 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Include the padding of the list 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int returnedHeight = mListPadding.top + mListPadding.bottom; 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = ((mDividerHeight > 0) && mDivider != null) ? mDividerHeight : 0; 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The previous height value that was less than maxHeight and contained 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no partial children 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int prevHeightWithoutPartialChild = 0; 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int i; 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // mItemCount - 1 since endPosition parameter is inclusive 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endPosition = (endPosition == NO_POSITION) ? adapter.getCount() - 1 : endPosition; 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final AbsListView.RecycleBin recycleBin = mRecycler; 12669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean recyle = recycleOnMeasure(); 126721875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy final boolean[] isScrap = mIsScrap; 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (i = startPosition; i <= endPosition; ++i) { 127021875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy child = obtainView(i, isScrap); 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureScrapChild(child, i, widthMeasureSpec); 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i > 0) { 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Count the divider for all but one child 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project returnedHeight += dividerHeight; 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Recycle the view before we possibly return from the method 12809c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy if (recyle && recycleBin.shouldRecycleViewType( 12819c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy ((LayoutParams) child.getLayoutParams()).viewType)) { 1282079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(child, -1); 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project returnedHeight += child.getMeasuredHeight(); 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (returnedHeight >= maxHeight) { 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We went over, figure out which height to return. If returnedHeight > maxHeight, 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // then the i'th position did not fit completely. 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (disallowPartialChildPosition >= 0) // Disallowing is enabled (> -1) 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (i > disallowPartialChildPosition) // We've past the min pos 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (prevHeightWithoutPartialChild > 0) // We have a prev height 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (returnedHeight != maxHeight) // i'th child did not fit completely 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ? prevHeightWithoutPartialChild 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : maxHeight; 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((disallowPartialChildPosition >= 0) && (i >= disallowPartialChildPosition)) { 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevHeightWithoutPartialChild = returnedHeight; 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // At this point, we went through the range of children, and they each 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // completely fit, so return the returnedHeight 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return returnedHeight; 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int findMotionRow(int y) { 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 131284222e04252720cf681032e865db526ce4a612a4Adam Powell if (!mStackFromBottom) { 131384222e04252720cf681032e865db526ce4a612a4Adam Powell for (int i = 0; i < childCount; i++) { 131484222e04252720cf681032e865db526ce4a612a4Adam Powell View v = getChildAt(i); 131584222e04252720cf681032e865db526ce4a612a4Adam Powell if (y <= v.getBottom()) { 131684222e04252720cf681032e865db526ce4a612a4Adam Powell return mFirstPosition + i; 131784222e04252720cf681032e865db526ce4a612a4Adam Powell } 131884222e04252720cf681032e865db526ce4a612a4Adam Powell } 131984222e04252720cf681032e865db526ce4a612a4Adam Powell } else { 132084222e04252720cf681032e865db526ce4a612a4Adam Powell for (int i = childCount - 1; i >= 0; i--) { 132184222e04252720cf681032e865db526ce4a612a4Adam Powell View v = getChildAt(i); 132284222e04252720cf681032e865db526ce4a612a4Adam Powell if (y >= v.getTop()) { 132384222e04252720cf681032e865db526ce4a612a4Adam Powell return mFirstPosition + i; 132484222e04252720cf681032e865db526ce4a612a4Adam Powell } 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Put a specific item at a specific location on the screen and then build 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * up and down from there. 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The reference view to use as the starting point 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param top Pixel offset from the top of this view to the top of the 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * reference view. 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The selected view, or null if the selected view is outside the 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible area. 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillSpecific(int position, int top) { 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean tempIsSelected = position == mSelectedPosition; 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View temp = makeAndAddView(position, top, true, mListPadding.left, tempIsSelected); 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Possibly changed again in fillUp if we add rows above this one. 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = position; 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View above; 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View below; 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project above = fillUp(position - 1, temp.getTop() - dividerHeight); 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will correct for the top of the first view not touching the top of the list 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project below = fillDown(position + 1, temp.getBottom() + dividerHeight); 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(childCount); 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project below = fillDown(position + 1, temp.getBottom() + dividerHeight); 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will correct for the bottom of the last view not touching the bottom of the list 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project above = fillUp(position - 1, temp.getTop() - dividerHeight); 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(childCount); 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (tempIsSelected) { 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return temp; 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (above != null) { 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return above; 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return below; 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Check if we have dragged the bottom of the list too high (we have pushed the 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top element off the top of the screen when we did not need to). Correct by sliding 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * everything back down. 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childCount Number of children 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void correctTooHigh(int childCount) { 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // First see if the last item is visible. If it is not, it is OK for the 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top of the list to be pushed up. 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastPosition = mFirstPosition + childCount - 1; 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastPosition == mItemCount - 1 && childCount > 0) { 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the last child ... 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View lastChild = getChildAt(childCount - 1); 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and its bottom edge 13989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastBottom = lastChild.getBottom(); 13999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is bottom of our drawable area 14019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int end = (mBottom - mTop) - mListPadding.bottom; 14029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is how far the bottom edge of the last view is from the bottom of the 14049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // drawable area 14059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomOffset = end - lastBottom; 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View firstChild = getChildAt(0); 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstTop = firstChild.getTop(); 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure we are 1) Too high, and 2) Either there are more rows above the 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first row or the first row is scrolled off the top of the drawable area 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bottomOffset > 0 && (mFirstPosition > 0 || firstTop < mListPadding.top)) { 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0) { 14139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't pull the top too far down 14149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomOffset = Math.min(bottomOffset, mListPadding.top - firstTop); 14159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Move everything down 14179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(bottomOffset); 14189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition > 0) { 14199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill the gap that was opened above mFirstPosition with more rows, if 14209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // possible 14219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mFirstPosition - 1, firstChild.getTop() - mDividerHeight); 14229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Close up the remaining gap 14239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 14249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Check if we have dragged the bottom of the list too low (we have pushed the 14329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bottom element off the bottom of the screen when we did not need to). Correct by sliding 14339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * everything back up. 14349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 14359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childCount Number of children 14369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void correctTooLow(int childCount) { 14389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // First see if the first item is visible. If it is not, it is OK for the 14399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // bottom of the list to be pushed down. 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0 && childCount > 0) { 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the first child ... 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View firstChild = getChildAt(0); 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and its top edge 14469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstTop = firstChild.getTop(); 14479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is top of our drawable area 14499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int start = mListPadding.top; 14509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is bottom of our drawable area 14529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int end = (mBottom - mTop) - mListPadding.bottom; 14539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is how far the top edge of the first view is from the top of the 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // drawable area 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topOffset = firstTop - start; 14579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View lastChild = getChildAt(childCount - 1); 14589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastBottom = lastChild.getBottom(); 14599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastPosition = mFirstPosition + childCount - 1; 14609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure we are 1) Too low, and 2) Either there are more rows below the 14629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // last row or the last row is scrolled off the bottom of the drawable area 14636198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (topOffset > 0) { 14646198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (lastPosition < mItemCount - 1 || lastBottom > end) { 14656198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (lastPosition == mItemCount - 1) { 14666198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Don't pull the bottom too far up 14676198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy topOffset = Math.min(topOffset, lastBottom - end); 14686198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy } 14696198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Move everything up 14706198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy offsetChildrenTopAndBottom(-topOffset); 14716198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (lastPosition < mItemCount - 1) { 14726198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Fill the gap that was opened below the last position with more rows, if 14736198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // possible 14746198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy fillDown(lastPosition + 1, lastChild.getBottom() + mDividerHeight); 14756198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Close up the remaining gap 14766198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy adjustViewsUpOrDown(); 14776198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy } 14786198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy } else if (lastPosition == mItemCount - 1) { 14796198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy adjustViewsUpOrDown(); 14809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void layoutChildren() { 14879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean blockLayoutRequests = mBlockLayoutRequests; 1488d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette if (blockLayoutRequests) { 14894df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project return; 14909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1492d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette mBlockLayoutRequests = true; 1493d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette 14949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 14959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.layoutChildren(); 14969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 14989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter == null) { 15009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 15019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 15029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 15039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1505d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette final int childrenTop = mListPadding.top; 1506d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette final int childrenBottom = mBottom - mTop - mListPadding.bottom; 1507d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette final int childCount = getChildCount(); 15089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1509ead0d4d8282b35a10bf8816cd99a62a8499d9031Romain Guy int index = 0; 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = 0; 15119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 15139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldSel = null; 15149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldFirst = null; 15159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newSel = null; 15169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember stuff we will need down below 15189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mLayoutMode) { 15199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SET_SELECTION: 15209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = mNextSelectedPosition - mFirstPosition; 15219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0 && index < childCount) { 15229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSel = getChildAt(index); 15239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 15259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_TOP: 15269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_BOTTOM: 15279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SPECIFIC: 15289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SYNC: 15299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 15309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_MOVE_SELECTION: 15319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: 15329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember the previously selected view 15339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = mSelectedPosition - mFirstPosition; 15349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0 && index < childCount) { 15359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel = getChildAt(index); 15369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember the previous first child 15399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldFirst = getChildAt(0); 15409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNextSelectedPosition >= 0) { 15429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = mNextSelectedPosition - mSelectedPosition; 15439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Caution: newSel might be null 15469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSel = getChildAt(index + delta); 15479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean dataChanged = mDataChanged; 15519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dataChanged) { 15529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleDataChanged(); 15539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Handle the empty set by removing all views that are visible 15569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // and calling it a day 15579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 15589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 15599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 15609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 1561b45f124a041adf81b3ac8b8dec6b396e751e92d7Romain Guy } else if (mItemCount != mAdapter.getCount()) { 1562b45f124a041adf81b3ac8b8dec6b396e751e92d7Romain Guy throw new IllegalStateException("The content of the adapter has changed but " 1563b45f124a041adf81b3ac8b8dec6b396e751e92d7Romain Guy + "ListView did not receive a notification. Make sure the content of " 15647d8314db41707a98afb269a78e7bc90ac75d37fcAlan Viverette + "your adapter is not modified from a background thread, but only from " 15657d8314db41707a98afb269a78e7bc90ac75d37fcAlan Viverette + "the UI thread. Make sure your adapter calls notifyDataSetChanged() " 15667d8314db41707a98afb269a78e7bc90ac75d37fcAlan Viverette + "when its content changes. [in ListView(" + getId() + ", " + getClass() 15673940f2df36fbe6a712c88655fc78244977ebd0abOwen Lin + ") with Adapter(" + mAdapter.getClass() + ")]"); 15689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(mNextSelectedPosition); 15719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15723e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null; 15733e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette View accessibilityFocusLayoutRestoreView = null; 15743e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette int accessibilityFocusPosition = INVALID_POSITION; 15753e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette 15763e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Remember which child, if any, had accessibility focus. This must 15773e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // occur before recycling any views, since that will clear 15783e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // accessibility focus. 15793e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final ViewRootImpl viewRootImpl = getViewRootImpl(); 15803e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (viewRootImpl != null) { 15813e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final View focusHost = viewRootImpl.getAccessibilityFocusedHost(); 15823e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (focusHost != null) { 15833e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final View focusChild = getAccessibilityFocusedChild(focusHost); 15843e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (focusChild != null) { 15853e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (!dataChanged || isDirectChildHeaderOrFooter(focusChild) 15863e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette || focusChild.hasTransientState() || mAdapterHasStableIds) { 15873e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // The views won't be changing, so try to maintain 15883e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // focus on the current host and virtual view. 15893e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette accessibilityFocusLayoutRestoreView = focusHost; 15903e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette accessibilityFocusLayoutRestoreNode = viewRootImpl 15913e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette .getAccessibilityFocusedVirtualView(); 15923e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 15933e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette 15943e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // If all else fails, maintain focus at the same 15953e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // position. 15963e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette accessibilityFocusPosition = getPositionForView(focusChild); 15973e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 15983e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 1599b53c5f6b6f84518145c5cbfd3cc1729758fbc7c0Alan Viverette } 1600b53c5f6b6f84518145c5cbfd3cc1729758fbc7c0Alan Viverette 16013e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette View focusLayoutRestoreDirectChild = null; 16023e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette View focusLayoutRestoreView = null; 16033e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette 16043e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Take focus back to us temporarily to avoid the eventual call to 16053e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // clear focus when removing the focused child below from messing 16063e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // things up when ViewAncestor assigns focus back to someone else. 1607d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette final View focusedChild = getFocusedChild(); 1608d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette if (focusedChild != null) { 16093e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // TODO: in some cases focusedChild.getParent() == null 16103e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette 16113e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // We can remember the focused view to restore after re-layout 16123e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // if the data hasn't changed, or if the focused position is a 16133e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // header or footer. 16143e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { 16153e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette focusLayoutRestoreDirectChild = focusedChild; 16163e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Remember the specific view that had focus. 16173e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette focusLayoutRestoreView = findFocus(); 16183e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (focusLayoutRestoreView != null) { 16193e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Tell it we are going to mess with it. 16203e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette focusLayoutRestoreView.onStartTemporaryDetach(); 16213e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 16223e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 16233e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette requestFocus(); 1624d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette } 1625d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette 16269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pull all children into the RecycleBin. 16279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // These views will be reused if possible 16289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstPosition = mFirstPosition; 16299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final RecycleBin recycleBin = mRecycler; 16309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dataChanged) { 16319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < childCount; i++) { 1632079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(getChildAt(i), firstPosition+i); 16339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.fillActiveViews(childCount, firstPosition); 16369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear out old views 16399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachAllViewsFromParent(); 1640539ee8716b4f81260bab2e9f3dc5d88d81c99985Adam Powell recycleBin.removeSkippedScrap(); 16419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mLayoutMode) { 16439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SET_SELECTION: 16449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSel != null) { 16459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromSelection(newSel.getTop(), childrenTop, childrenBottom); 16469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromMiddle(childrenTop, childrenBottom); 16489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SYNC: 16519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mSyncPosition, mSpecificTop); 16529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_BOTTOM: 16549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillUp(mItemCount - 1, childrenBottom); 16559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 16569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_TOP: 16589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = 0; 16599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromTop(childrenTop); 16609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 16619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SPECIFIC: 16639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(reconcileSelectedPosition(), mSpecificTop); 16649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_MOVE_SELECTION: 16669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = moveSelection(oldSel, newSel, delta, childrenTop, childrenBottom); 16679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: 16699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount == 0) { 16709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 16719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int position = lookForSelectablePosition(0, true); 16729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 16739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromTop(childrenTop); 16749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int position = lookForSelectablePosition(mItemCount - 1, false); 16769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 16779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillUp(mItemCount - 1, childrenBottom); 16789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { 16819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mSelectedPosition, 16829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel == null ? childrenTop : oldSel.getTop()); 16839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (mFirstPosition < mItemCount) { 16849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mFirstPosition, 16859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldFirst == null ? childrenTop : oldFirst.getTop()); 16869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(0, childrenTop); 16889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Flush any cached views that did not get reused above 16949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.scrapActiveViews(); 16959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel != null) { 16973e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // The current selected item should get focus if items are 16983e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // focusable. 16993e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { 17003e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && 17013e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette focusLayoutRestoreView != null && 17023e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); 17033e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (!focusWasTaken) { 17043e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Selected item didn't take focus, but we still want to 17053e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // make sure something else outside of the selected view 17063e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // has focus. 17073616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final View focused = getFocusedChild(); 17083616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (focused != null) { 17093616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy focused.clearFocus(); 17103616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 1711079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(INVALID_POSITION, sel); 17123e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } else { 17133e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette sel.setSelected(false); 17143e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette mSelectorRect.setEmpty(); 17153616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 17163616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } else { 1717079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(INVALID_POSITION, sel); 17183616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 17193616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mSelectedTop = sel.getTop(); 17209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1721d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette // If the user's finger is down, select the motion position. 1722d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette // Otherwise, clear selection. 1723d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette if (mTouchMode == TOUCH_MODE_TAP || mTouchMode == TOUCH_MODE_DONE_WAITING) { 1724d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette final View child = getChildAt(mMotionPosition - mFirstPosition); 1725d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette if (child != null) { 1726d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette positionSelector(mMotionPosition, child); 1727d44696c4cfdda1e7e4e10a21b68f54ce5a4a459dAlan Viverette } 17283616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } else { 17293616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mSelectedTop = 0; 17303616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mSelectorRect.setEmpty(); 17313616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 17329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17333e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Even if there is not selected position, we may need to 17343e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // restore focus (i.e. something focusable in touch mode). 17353e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (hasFocus() && focusLayoutRestoreView != null) { 17363e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette focusLayoutRestoreView.requestFocus(); 17373e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 17383e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 17396820751c0ad396328da39adfb3756ffc838c0cc7Alan Viverette 17403e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Attempt to restore accessibility focus, if necessary. 17412e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette if (viewRootImpl != null) { 17422e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette final View newAccessibilityFocusedView = viewRootImpl.getAccessibilityFocusedHost(); 17432e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette if (newAccessibilityFocusedView == null) { 17442e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette if (accessibilityFocusLayoutRestoreView != null 17452e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette && accessibilityFocusLayoutRestoreView.isAttachedToWindow()) { 17462e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette final AccessibilityNodeProvider provider = 17472e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette accessibilityFocusLayoutRestoreView.getAccessibilityNodeProvider(); 17482e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette if (accessibilityFocusLayoutRestoreNode != null && provider != null) { 17492e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette final int virtualViewId = AccessibilityNodeInfo.getVirtualDescendantId( 17502e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette accessibilityFocusLayoutRestoreNode.getSourceNodeId()); 17512e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette provider.performAction(virtualViewId, 17522e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS, null); 17532e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette } else { 17542e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette accessibilityFocusLayoutRestoreView.requestAccessibilityFocus(); 17552e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette } 17562e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette } else if (accessibilityFocusPosition != INVALID_POSITION) { 17572e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette // Bound the position within the visible children. 17582e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette final int position = MathUtils.constrain( 17592e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette accessibilityFocusPosition - mFirstPosition, 0, 17602e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette getChildCount() - 1); 17612e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette final View restoreView = getChildAt(position); 17622e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette if (restoreView != null) { 17632e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette restoreView.requestAccessibilityFocus(); 17642e6fc8ca5696367a680656f73c1b9b95648eb6faAlan Viverette } 17656820751c0ad396328da39adfb3756ffc838c0cc7Alan Viverette } 176630ee76cf05f785bbf819b71954242c835c597ce1alanv } 176730ee76cf05f785bbf819b71954242c835c597ce1alanv } 176830ee76cf05f785bbf819b71954242c835c597ce1alanv 17693e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // Tell focus view we are done mucking with it, if it is still in 17703e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette // our view hierarchy. 17713e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (focusLayoutRestoreView != null 17723e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette && focusLayoutRestoreView.getWindowToken() != null) { 17733e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette focusLayoutRestoreView.onFinishTemporaryDetach(); 17749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_NORMAL; 17779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataChanged = false; 1778161abf3d44feebb8462f7d0cbee81574d666234bAdam Powell if (mPositionScrollAfterLayout != null) { 1779161abf3d44feebb8462f7d0cbee81574d666234bAdam Powell post(mPositionScrollAfterLayout); 1780161abf3d44feebb8462f7d0cbee81574d666234bAdam Powell mPositionScrollAfterLayout = null; 1781161abf3d44feebb8462f7d0cbee81574d666234bAdam Powell } 17829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNeedSync = false; 17839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(mSelectedPosition); 17849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project updateScrollIndicators(); 17869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0) { 17889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 17899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 17929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 17939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!blockLayoutRequests) { 17949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBlockLayoutRequests = false; 17959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 18003e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette * @param child a direct child of this list. 18013e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette * @return Whether child is a header or footer view. 18023e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette */ 18033e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette private boolean isDirectChildHeaderOrFooter(View child) { 18043e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final ArrayList<FixedViewInfo> headers = mHeaderViewInfos; 18053e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final int numHeaders = headers.size(); 18063e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette for (int i = 0; i < numHeaders; i++) { 18073e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (child == headers.get(i).view) { 18083e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette return true; 18093e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 18103e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 18113e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette 18123e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final ArrayList<FixedViewInfo> footers = mFooterViewInfos; 18133e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette final int numFooters = footers.size(); 18143e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette for (int i = 0; i < numFooters; i++) { 18153e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette if (child == footers.get(i).view) { 18163e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette return true; 18173e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 18183e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 18193e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette 18203e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette return false; 18213e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette } 18223e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette 18233e14162fc655e7a0dae61318911f3e29c07d0bf0Alan Viverette /** 18249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Obtain the view and add it to our list of children. The view can be made 18259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * fresh, converted from an unused view, or used as is if it was in the 18269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * recycle bin. 18279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 18289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Logical position in the list 18299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y Top or bottom edge of the view to add 18309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flow If flow is true, align top edge to y. If false, align bottom 18319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge to y. 18329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenLeft Left edge where children should be positioned 18339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selected Is this position selected? 18349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return View that was added 18359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 18369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View makeAndAddView(int position, int y, boolean flow, int childrenLeft, 18379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected) { 18389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 18399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mDataChanged) { 1842079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn // Try to use an existing view for this position 18439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = mRecycler.getActiveView(position); 18449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 18459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Found it -- we're using an existing child 18469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This just needs to be positioned 18479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setupChild(child, position, y, flow, childrenLeft, selected, true); 18489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 18509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make a new view for this position, or convert an unused view if possible 185421875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy child = obtainView(position, mIsScrap); 18559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This needs to be positioned and measured 185721875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy setupChild(child, position, y, flow, childrenLeft, selected, mIsScrap[0]); 18589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 18609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 18639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a view as a child and make sure it is measured (if necessary) and 18649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * positioned properly. 18659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 18669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The view to add 18679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The position of this child 18689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y position relative to which this view will be positioned 18699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flowDown If true, align top edge to y. If false, align bottom 18709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge to y. 18719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenLeft Left edge where children should be positioned 18729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selected Is this position selected? 18739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param recycled Has this view been pulled from the recycle bin? If so it 18749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * does not need to be remeasured. 18759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 18769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void setupChild(View child, int position, int y, boolean flowDown, int childrenLeft, 18779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected, boolean recycled) { 18785fade8c69aef621312232ef0647502d7a63990b9Romain Guy Trace.traceBegin(Trace.TRACE_TAG_VIEW, "setupListItem"); 18795fade8c69aef621312232ef0647502d7a63990b9Romain Guy 18809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean isSelected = selected && shouldShowSelector(); 18819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean updateChildSelected = isSelected != child.isSelected(); 18823616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final int mode = mTouchMode; 18833616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL && 18843616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mMotionPosition == position; 18853616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final boolean updateChildPressed = isPressed != child.isPressed(); 18869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean needToMeasure = !recycled || updateChildSelected || child.isLayoutRequested(); 18879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Respect layout params that are already in the view. Otherwise make some up... 18899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // noinspection unchecked 18909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project AbsListView.LayoutParams p = (AbsListView.LayoutParams) child.getLayoutParams(); 18919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 1892aebd28f729fa28016d70551d0372ab7fcd56ee1aAdam Powell p = (AbsListView.LayoutParams) generateDefaultLayoutParams(); 18939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p.viewType = mAdapter.getItemViewType(position); 18959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18960bf88594c43ced48d862d122e3e84967b3b63658Romain Guy if ((recycled && !p.forceAdd) || (p.recycledHeaderFooter && 1897c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER)) { 18989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project attachViewToParent(child, flowDown ? -1 : 0, p); 18999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19000bf88594c43ced48d862d122e3e84967b3b63658Romain Guy p.forceAdd = false; 19014df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project if (p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER) { 19024df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project p.recycledHeaderFooter = true; 19034df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project } 19049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addViewInLayout(child, flowDown ? -1 : 0, p, true); 19059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (updateChildSelected) { 19089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setSelected(isSelected); 19099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19113616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (updateChildPressed) { 19123616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy child.setPressed(isPressed); 19133616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 19143616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy 19159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null) { 19169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child instanceof Checkable) { 19179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ((Checkable) child).setChecked(mCheckStates.get(position)); 1918d0fa371f276fde32d81c037006941bc93da0bb03Dianne Hackborn } else if (getContext().getApplicationInfo().targetSdkVersion 1919d0fa371f276fde32d81c037006941bc93da0bb03Dianne Hackborn >= android.os.Build.VERSION_CODES.HONEYCOMB) { 1920d0fa371f276fde32d81c037006941bc93da0bb03Dianne Hackborn child.setActivated(mCheckStates.get(position)); 19219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToMeasure) { 19259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 19269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 19279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 19289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 19299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 19309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 19319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 19339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 19359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cleanupLayoutState(child); 19379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int w = child.getMeasuredWidth(); 19409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int h = child.getMeasuredHeight(); 19419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childTop = flowDown ? y : y - h; 19429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToMeasure) { 19449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childRight = childrenLeft + w; 19459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childBottom = childTop + h; 19469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childrenLeft, childTop, childRight, childBottom); 19479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.offsetLeftAndRight(childrenLeft - child.getLeft()); 19499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.offsetTopAndBottom(childTop - child.getTop()); 19509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCachingStarted && !child.isDrawingCacheEnabled()) { 19539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setDrawingCacheEnabled(true); 19549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1955079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn 1956079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn if (recycled && (((AbsListView.LayoutParams)child.getLayoutParams()).scrappedFromPosition) 1957079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn != position) { 1958079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn child.jumpDrawablesToCurrentState(); 1959079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn } 19605fade8c69aef621312232ef0647502d7a63990b9Romain Guy 19615fade8c69aef621312232ef0647502d7a63990b9Romain Guy Trace.traceEnd(Trace.TRACE_TAG_VIEW); 19629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 19659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean canAnimate() { 19669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.canAnimate() && mItemCount > 0; 19679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 19709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the currently selected item. If in touch mode, the item will not be selected 19719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * but it will still be positioned appropriately. If the specified selection position 19729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is less than 0, then the item at position 0 will be selected. 19739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 19749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Index (starting at 0) of the data item to be selected. 19759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 19769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 19779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelection(int position) { 19789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionFromTop(position, 0); 19799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 19829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Makes the item at the supplied position selected. 1983f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron * 19849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position the position of the item to select 19859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 19869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 19879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void setSelectionInt(int position) { 19889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 1989f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron boolean awakeScrollbars = false; 1990f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 1991f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron final int selectedPosition = mSelectedPosition; 1992f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 1993f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (selectedPosition >= 0) { 1994f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (position == selectedPosition - 1) { 1995f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakeScrollbars = true; 1996f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } else if (position == selectedPosition + 1) { 1997f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakeScrollbars = true; 1998f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 1999f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 2000f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 20011fa179ef41c06bd19da70fd9bf95741238791940Adam Powell if (mPositionScroller != null) { 20021fa179ef41c06bd19da70fd9bf95741238791940Adam Powell mPositionScroller.stop(); 20031fa179ef41c06bd19da70fd9bf95741238791940Adam Powell } 20041fa179ef41c06bd19da70fd9bf95741238791940Adam Powell 20059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layoutChildren(); 2006f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 2007f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (awakeScrollbars) { 2008f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakenScrollBars(); 2009f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 20109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 20139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Find a position that can be selected (i.e., is not a separator). 20149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 20159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The starting position to look at. 20169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param lookDown Whether to look down for other positions. 20179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The next selectable position starting at position and then searching either up or 20189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down. Returns {@link #INVALID_POSITION} if nothing can be found. 20199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 20209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 20219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lookForSelectablePosition(int position, boolean lookDown) { 20229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = mAdapter; 20239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter == null || isInTouchMode()) { 20249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 20259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = adapter.getCount(); 20289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mAreAllItemsSelectable) { 20299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lookDown) { 20309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = Math.max(0, position); 20319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (position < count && !adapter.isEnabled(position)) { 20329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position++; 20339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 20359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = Math.min(position, count - 1); 20369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (position >= 0 && !adapter.isEnabled(position)) { 20379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position--; 20389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2040af9c5ea240746de088549261a505895cbf4882edAlan Viverette } 2041af9c5ea240746de088549261a505895cbf4882edAlan Viverette 2042af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (position < 0 || position >= count) { 2043af9c5ea240746de088549261a505895cbf4882edAlan Viverette return INVALID_POSITION; 2044af9c5ea240746de088549261a505895cbf4882edAlan Viverette } 2045af9c5ea240746de088549261a505895cbf4882edAlan Viverette 2046af9c5ea240746de088549261a505895cbf4882edAlan Viverette return position; 2047af9c5ea240746de088549261a505895cbf4882edAlan Viverette } 20489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2049af9c5ea240746de088549261a505895cbf4882edAlan Viverette /** 2050af9c5ea240746de088549261a505895cbf4882edAlan Viverette * Find a position that can be selected (i.e., is not a separator). If there 2051af9c5ea240746de088549261a505895cbf4882edAlan Viverette * are no selectable positions in the specified direction from the starting 2052af9c5ea240746de088549261a505895cbf4882edAlan Viverette * position, searches in the opposite direction from the starting position 2053af9c5ea240746de088549261a505895cbf4882edAlan Viverette * to the current position. 2054af9c5ea240746de088549261a505895cbf4882edAlan Viverette * 2055af9c5ea240746de088549261a505895cbf4882edAlan Viverette * @param current the current position 2056af9c5ea240746de088549261a505895cbf4882edAlan Viverette * @param position the starting position 2057af9c5ea240746de088549261a505895cbf4882edAlan Viverette * @param lookDown whether to look down for other positions 2058af9c5ea240746de088549261a505895cbf4882edAlan Viverette * @return the next selectable position, or {@link #INVALID_POSITION} if 2059af9c5ea240746de088549261a505895cbf4882edAlan Viverette * nothing can be found 2060af9c5ea240746de088549261a505895cbf4882edAlan Viverette */ 2061af9c5ea240746de088549261a505895cbf4882edAlan Viverette int lookForSelectablePositionAfter(int current, int position, boolean lookDown) { 2062af9c5ea240746de088549261a505895cbf4882edAlan Viverette final ListAdapter adapter = mAdapter; 2063af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (adapter == null || isInTouchMode()) { 2064af9c5ea240746de088549261a505895cbf4882edAlan Viverette return INVALID_POSITION; 2065af9c5ea240746de088549261a505895cbf4882edAlan Viverette } 2066af9c5ea240746de088549261a505895cbf4882edAlan Viverette 2067af9c5ea240746de088549261a505895cbf4882edAlan Viverette // First check after the starting position in the specified direction. 2068af9c5ea240746de088549261a505895cbf4882edAlan Viverette final int after = lookForSelectablePosition(position, lookDown); 2069af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (after != INVALID_POSITION) { 2070af9c5ea240746de088549261a505895cbf4882edAlan Viverette return after; 2071af9c5ea240746de088549261a505895cbf4882edAlan Viverette } 2072af9c5ea240746de088549261a505895cbf4882edAlan Viverette 2073af9c5ea240746de088549261a505895cbf4882edAlan Viverette // Then check between the starting position and the current position. 2074af9c5ea240746de088549261a505895cbf4882edAlan Viverette final int count = adapter.getCount(); 2075af9c5ea240746de088549261a505895cbf4882edAlan Viverette current = MathUtils.constrain(current, -1, count - 1); 2076af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (lookDown) { 2077af9c5ea240746de088549261a505895cbf4882edAlan Viverette position = Math.min(position - 1, count - 1); 2078af9c5ea240746de088549261a505895cbf4882edAlan Viverette while ((position > current) && !adapter.isEnabled(position)) { 2079af9c5ea240746de088549261a505895cbf4882edAlan Viverette position--; 2080af9c5ea240746de088549261a505895cbf4882edAlan Viverette } 2081af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (position <= current) { 20829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 20839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2085af9c5ea240746de088549261a505895cbf4882edAlan Viverette position = Math.max(0, position + 1); 2086af9c5ea240746de088549261a505895cbf4882edAlan Viverette while ((position < current) && !adapter.isEnabled(position)) { 2087af9c5ea240746de088549261a505895cbf4882edAlan Viverette position++; 2088af9c5ea240746de088549261a505895cbf4882edAlan Viverette } 2089af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (position >= current) { 20909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 20919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2093af9c5ea240746de088549261a505895cbf4882edAlan Viverette 2094af9c5ea240746de088549261a505895cbf4882edAlan Viverette return position; 20959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 20989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * setSelectionAfterHeaderView set the selection to be the first list item 20999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * after the header views. 21009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 21019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelectionAfterHeaderView() { 21029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = mHeaderViewInfos.size(); 21039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 21049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextSelectedPosition = 0; 21059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 21069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter != null) { 21099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelection(count); 21109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 21119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextSelectedPosition = count; 21129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SET_SELECTION; 21139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 21189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 21199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Dispatch in the normal way 21209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = super.dispatchKeyEvent(event); 21219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!handled) { 21229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If we didn't handle it... 21239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focused = getFocusedChild(); 21249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focused != null && event.getAction() == KeyEvent.ACTION_DOWN) { 21259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and our focused child didn't handle it 21269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... give it to ourselves so we can scroll if necessary 21279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = onKeyDown(event.getKeyCode(), event); 21289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 21319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 21349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyDown(int keyCode, KeyEvent event) { 21359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, 1, event); 21369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 21399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 21409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, repeatCount, event); 21419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 21449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyUp(int keyCode, KeyEvent event) { 21459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, 1, event); 21469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean commonKey(int keyCode, int count, KeyEvent event) { 214931986b5b696c399b356c8819cb581441027bef36Adam Powell if (mAdapter == null || !isAttachedToWindow()) { 21509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 21519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDataChanged) { 21549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layoutChildren(); 21559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 21589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int action = event.getAction(); 21599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (action != KeyEvent.ACTION_UP) { 21619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 21629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_UP: 21634e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21648d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded(); 21658d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (!handled) { 21664e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown while (count-- > 0) { 21678d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (arrowScroll(FOCUS_UP)) { 21688d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = true; 21698d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } else { 21708d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown break; 21718d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 21724e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21744e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 21758d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); 21769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 21789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_DOWN: 21804e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21818d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded(); 21828d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (!handled) { 21834e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown while (count-- > 0) { 21848d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (arrowScroll(FOCUS_DOWN)) { 21858d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = true; 21868d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } else { 21878d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown break; 21888d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 21894e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21914e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 21928d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); 21939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 21959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 21974e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21984e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown handled = handleHorizontalFocusWithinListItem(View.FOCUS_LEFT); 21994e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 22014e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 22029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 22034e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 22044e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown handled = handleHorizontalFocusWithinListItem(View.FOCUS_RIGHT); 22054e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 22079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 22099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: 22108d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (event.hasNoModifiers()) { 22118d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded(); 22128d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (!handled 22138d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown && event.getRepeatCount() == 0 && getChildCount() > 0) { 22148d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown keyPressed(); 22158d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = true; 22168d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 22179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 22199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 22219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mPopup == null || !mPopup.isShowing()) { 22224e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 22238d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_DOWN); 22244e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) { 22258d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_UP); 22269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = true; 22289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 22304e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 22314e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_PAGE_UP: 22324e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 22338d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_UP); 22344e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 22358d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); 22364e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22374e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 22384e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 22394e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_PAGE_DOWN: 22404e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 22418d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_DOWN); 22424e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 22438d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); 22444e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22454e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 22464e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 22474e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_MOVE_HOME: 22484e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 22498d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); 22504e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22514e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 22524e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 22534e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_MOVE_END: 22544e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 22558d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); 22564e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22574e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 22584e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 22594e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_TAB: 22604e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // XXX Sometimes it is useful to be able to TAB through the items in 22614e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // a ListView sequentially. Unfortunately this can create an 22624e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // asymmetry in TAB navigation order unless the list selection 22634e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // always reverts to the top or bottom when receiving TAB focus from 22644e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // another widget. Leaving this behavior disabled for now but 22654e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // perhaps it should be configurable (and more comprehensive). 22664e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (false) { 22674e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 22688d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || arrowScroll(FOCUS_DOWN); 22694e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) { 22708d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || arrowScroll(FOCUS_UP); 22714e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22724e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 22734e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 22749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22778d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (handled) { 22788d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return true; 22799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22818d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (sendToTextFilter(keyCode, count, event)) { 22829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 22838d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 22849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22858d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown switch (action) { 22868d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown case KeyEvent.ACTION_DOWN: 22878d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return super.onKeyDown(keyCode, event); 22889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22898d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown case KeyEvent.ACTION_UP: 22908d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return super.onKeyUp(keyCode, event); 22919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22928d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown case KeyEvent.ACTION_MULTIPLE: 22938d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return super.onKeyMultiple(keyCode, count, event); 22948d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown 22958d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown default: // shouldn't happen 22968d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return false; 22979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 23019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls up or down by the number of items currently present on screen. 23029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 23039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 23049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 23059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean pageScroll(int direction) { 2307af9c5ea240746de088549261a505895cbf4882edAlan Viverette final int nextPage; 2308af9c5ea240746de088549261a505895cbf4882edAlan Viverette final boolean down; 23099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == FOCUS_UP) { 23119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextPage = Math.max(0, mSelectedPosition - getChildCount() - 1); 2312af9c5ea240746de088549261a505895cbf4882edAlan Viverette down = false; 23139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == FOCUS_DOWN) { 23149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextPage = Math.min(mItemCount - 1, mSelectedPosition + getChildCount() - 1); 23159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project down = true; 2316af9c5ea240746de088549261a505895cbf4882edAlan Viverette } else { 2317af9c5ea240746de088549261a505895cbf4882edAlan Viverette return false; 23189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextPage >= 0) { 2321af9c5ea240746de088549261a505895cbf4882edAlan Viverette final int position = lookForSelectablePositionAfter(mSelectedPosition, nextPage, down); 23229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 23239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SPECIFIC; 23249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpecificTop = mPaddingTop + getVerticalFadingEdgeLength(); 23259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2326af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (down && (position > (mItemCount - getChildCount()))) { 23279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_BOTTOM; 23289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2330af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (!down && (position < getChildCount())) { 23319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_TOP; 23329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 23359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 2336f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (!awakenScrollBars()) { 2337f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron invalidate(); 2338f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 23399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 23419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 23459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2348af9c5ea240746de088549261a505895cbf4882edAlan Viverette * Go to the last or first item if possible (not worrying about panning 2349af9c5ea240746de088549261a505895cbf4882edAlan Viverette * across or navigating within the internal focus of the currently selected 2350af9c5ea240746de088549261a505895cbf4882edAlan Viverette * item.) 23519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 23529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 23539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 23549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean fullScroll(int direction) { 23569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean moved = false; 23579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == FOCUS_UP) { 23589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition != 0) { 2359af9c5ea240746de088549261a505895cbf4882edAlan Viverette final int position = lookForSelectablePositionAfter(mSelectedPosition, 0, true); 23609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 23619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_TOP; 23629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 23639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 23649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project moved = true; 23669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == FOCUS_DOWN) { 2368af9c5ea240746de088549261a505895cbf4882edAlan Viverette final int lastItem = (mItemCount - 1); 2369af9c5ea240746de088549261a505895cbf4882edAlan Viverette if (mSelectedPosition < lastItem) { 2370af9c5ea240746de088549261a505895cbf4882edAlan Viverette final int position = lookForSelectablePositionAfter( 2371af9c5ea240746de088549261a505895cbf4882edAlan Viverette mSelectedPosition, lastItem, false); 23729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 23739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_BOTTOM; 23749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 23759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 23769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project moved = true; 23789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2381f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (moved && !awakenScrollBars()) { 2382f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakenScrollBars(); 23839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 23849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return moved; 23879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 23909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * To avoid horizontal focus searches changing the selected item, we 23919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manually focus search within the selected item (as applicable), and 23929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * prevent focus from jumping to something within another item. 23939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction one of {View.FOCUS_LEFT, View.FOCUS_RIGHT} 23949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether this consumes the key event. 23959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean handleHorizontalFocusWithinListItem(int direction) { 23979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction != View.FOCUS_LEFT && direction != View.FOCUS_RIGHT) { 2398304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy throw new IllegalArgumentException("direction must be one of" 2399304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy + " {View.FOCUS_LEFT, View.FOCUS_RIGHT}"); 24009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 24039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && numChildren > 0 && mSelectedPosition != INVALID_POSITION) { 24049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View selectedView = getSelectedView(); 2405304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy if (selectedView != null && selectedView.hasFocus() && 2406304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy selectedView instanceof ViewGroup) { 2407304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy 24089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View currentFocus = selectedView.findFocus(); 24099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = FocusFinder.getInstance().findNextFocus( 2410304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy (ViewGroup) selectedView, currentFocus, direction); 24119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus != null) { 24129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // do the math to get interesting rect in next focus' coordinates 24139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocus.getFocusedRect(mTempRect); 24149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocus, mTempRect); 24159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetRectIntoDescendantCoords(nextFocus, mTempRect); 24169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus.requestFocus(direction, mTempRect)) { 24179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 24189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we are blocking the key from being handled (by returning true) 24219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the global result is going to be some other view within this 24229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // list. this is to acheive the overall goal of having 24239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // horizontal d-pad navigation remain in the current item. 2424304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy final View globalNextFocus = FocusFinder.getInstance().findNextFocus( 2425304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy (ViewGroup) getRootView(), currentFocus, direction); 24269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (globalNextFocus != null) { 24279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return isViewAncestorOf(globalNextFocus, this); 24289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 24329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls to the next or previous item if possible. 24369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 24379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 24389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 24399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 24409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 24419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean arrowScroll(int direction) { 24429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 24439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = true; 24449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean handled = arrowScrollImpl(direction); 24459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (handled) { 24469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project playSoundEffect(SoundEffectConstants.getContantForFocusDirection(direction)); 24479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 24499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 24509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = false; 24519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24552a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell * Used by {@link #arrowScrollImpl(int)} to help determine the next selected position 245649fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim * to move to. This return a position in the direction given if the selected item 245749fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim * is fully visible. 24582a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell * 245949fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim * @param selectedView Current selected view to move from 24602a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell * @param selectedPos Current selected position to move from 24612a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell * @param direction Direction to move in 24622a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell * @return Desired selected position after moving in the given direction 24632a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell */ 246449fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim private final int nextSelectedPositionForDirection( 246549fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim View selectedView, int selectedPos, int direction) { 24662a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell int nextSelected; 246749fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim 24682a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell if (direction == View.FOCUS_DOWN) { 246949fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim final int listBottom = getHeight() - mListPadding.bottom; 247049fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim if (selectedView != null && selectedView.getBottom() <= listBottom) { 247149fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim nextSelected = selectedPos != INVALID_POSITION && selectedPos >= mFirstPosition ? 247249fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim selectedPos + 1 : 247349fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim mFirstPosition; 247449fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim } else { 247549fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim return INVALID_POSITION; 247649fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim } 24772a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell } else { 247849fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim final int listTop = mListPadding.top; 247949fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim if (selectedView != null && selectedView.getTop() >= listTop) { 248049fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim final int lastPos = mFirstPosition + getChildCount() - 1; 248149fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim nextSelected = selectedPos != INVALID_POSITION && selectedPos <= lastPos ? 248249fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim selectedPos - 1 : 248349fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim lastPos; 248449fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim } else { 248549fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim return INVALID_POSITION; 248649fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim } 24872a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell } 24882a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell 24892a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell if (nextSelected < 0 || nextSelected >= mAdapter.getCount()) { 24902a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell return INVALID_POSITION; 24912a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell } 24922a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell return lookForSelectablePosition(nextSelected, direction == View.FOCUS_DOWN); 24932a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell } 24942a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell 24952a93911b87f7aac6d0dcceabc5983e81befeeda5Adam Powell /** 24969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle an arrow scroll going up or down. Take into account whether items are selectable, 24979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether there are focusable items etc. 24989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 24999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction Either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN}. 25009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether any scrolling, selection or focus change occured. 25019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean arrowScrollImpl(int direction) { 25039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() <= 0) { 25049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 25059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = getSelectedView(); 2508079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn int selectedPos = mSelectedPosition; 25099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 251049fc4dcd4c0d88b74084d6b2a2d843ad17b8a1ebJaewan Kim int nextSelectedPosition = nextSelectedPositionForDirection(selectedView, selectedPos, direction); 25119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = amountToScroll(direction, nextSelectedPosition); 25129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if we are moving focus, we may OVERRIDE the default behavior 25149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ArrowScrollFocusResult focusResult = mItemsCanFocus ? arrowScrollFocused(direction) : null; 25159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusResult != null) { 25169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextSelectedPosition = focusResult.getSelectedPosition(); 25179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = focusResult.getAmountToScroll(); 25189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean needToRedraw = focusResult != null; 25219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 25229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); 25239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(nextSelectedPosition); 25249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(nextSelectedPosition); 25259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = getSelectedView(); 2526079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn selectedPos = nextSelectedPosition; 25279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && focusResult == null) { 25289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // there was no new view found to take focus, make sure we 25299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // don't leave focus with the old selection 25309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focused = getFocusedChild(); 25319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focused != null) { 25329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focused.clearFocus(); 25339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project needToRedraw = true; 25369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 25379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (amountToScroll > 0) { 25409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollListItemsBy((direction == View.FOCUS_UP) ? amountToScroll : -amountToScroll); 25419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project needToRedraw = true; 25429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if we didn't find a new focusable, make sure any existing focused 25459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item that was panned off screen gives up focus. 25469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && (focusResult == null) 25479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && selectedView != null && selectedView.hasFocus()) { 25489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focused = selectedView.findFocus(); 25491ea6889136cdad8fc01de0665b3a16a4dcb259feMark Brophy if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { 25509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focused.clearFocus(); 25519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the current selection is panned off, we need to remove the selection 25559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition == INVALID_POSITION && selectedView != null 25569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && !isViewAncestorOf(selectedView, this)) { 25579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = null; 25589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project hideSelector(); 25599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // but we don't want to set the ressurect position (that would make subsequent 25619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // unhandled key events bring back the item we just scrolled off!) 25629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResurrectToPosition = INVALID_POSITION; 25639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToRedraw) { 25669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedView != null) { 2567079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(selectedPos, selectedView); 25689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = selectedView.getTop(); 25699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2570f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (!awakenScrollBars()) { 2571f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron invalidate(); 2572f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 25739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 25749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 25759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 25789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When selection changes, it is possible that the previously selected or the 25829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * next selected item will change its size. If so, we need to offset some folks, 25839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and re-layout the items as appropriate. 25849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 25859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedView The currently selected view (before changing selection). 25869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should be <code>null</code> if there was no previous selection. 25879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction Either {@link android.view.View#FOCUS_UP} or 25889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 25899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newSelectedPosition The position of the next selection. 25909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocusAssigned whether new focus was assigned. This matters because 25919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * when something has focus, we don't want to show selection (ugh). 25929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void handleNewSelectionChange(View selectedView, int direction, int newSelectedPosition, 25949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean newFocusAssigned) { 25959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSelectedPosition == INVALID_POSITION) { 25969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("newSelectedPosition needs to be valid"); 25979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // whether or not we are moving down or up, we want to preserve the 26009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top of whatever view is on top: 26019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // - moving down: the view that had selection 26029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // - moving up: the view that is getting selection 26039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View topView; 26049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View bottomView; 26059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topViewIndex, bottomViewIndex; 26069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean topSelected = false; 26079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedIndex = mSelectedPosition - mFirstPosition; 26089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int nextSelectedIndex = newSelectedPosition - mFirstPosition; 26099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP) { 26109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topViewIndex = nextSelectedIndex; 26119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomViewIndex = selectedIndex; 26129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView = getChildAt(topViewIndex); 26139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView = selectedView; 26149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topSelected = true; 26159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 26169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topViewIndex = selectedIndex; 26179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomViewIndex = nextSelectedIndex; 26189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView = selectedView; 26199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView = getChildAt(bottomViewIndex); 26209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 26239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // start with top view: is it changing size? 26259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (topView != null) { 26269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView.setSelected(!newFocusAssigned && topSelected); 26279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureAndAdjustDown(topView, topViewIndex, numChildren); 26289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is the bottom view changing size? 26319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bottomView != null) { 26329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView.setSelected(!newFocusAssigned && !topSelected); 26339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureAndAdjustDown(bottomView, bottomViewIndex, numChildren); 26349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Re-measure a child, and if its height changes, lay it out preserving its 26399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top, and adjust the children below it appropriately. 26409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child 26419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childIndex The view group index of the child. 26429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param numChildren The number of children in the view group. 26439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureAndAdjustDown(View child, int childIndex, int numChildren) { 26459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldHeight = child.getHeight(); 26469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureItem(child); 26479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getMeasuredHeight() != oldHeight) { 26489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // lay out the view, preserving its top 26499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project relayoutMeasuredItem(child); 26509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // adjust views below appropriately 26529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int heightDelta = child.getMeasuredHeight() - oldHeight; 26539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = childIndex + 1; i < numChildren; i++) { 26549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChildAt(i).offsetTopAndBottom(heightDelta); 26559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Measure a particular list child. 26619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * TODO: unify with setUpChild. 26629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child. 26639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureItem(View child) { 26659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams p = child.getLayoutParams(); 26669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 26679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p = new ViewGroup.LayoutParams( 2668980a938c1c9a6a5791a8240e5a1e6638ab28dc77Romain Guy ViewGroup.LayoutParams.MATCH_PARENT, 26699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT); 26709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 26739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 26749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 26759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 26769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 26779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 26789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 26799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 26809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 26829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout a child that has been measured, preserving its top position. 26869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * TODO: unify with setUpChild. 26879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child. 26889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void relayoutMeasuredItem(View child) { 26909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int w = child.getMeasuredWidth(); 26919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int h = child.getMeasuredHeight(); 26929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childLeft = mListPadding.left; 26939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childRight = childLeft + w; 26949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childTop = child.getTop(); 26959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childBottom = childTop + h; 26969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childLeft, childTop, childRight, childBottom); 26979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 27009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to preview next items when arrow srolling. 27019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 27029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getArrowScrollPreviewLength() { 27039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.max(MIN_SCROLL_PREVIEW_PIXELS, getVerticalFadingEdgeLength()); 27049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 27079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine how much we need to scroll in order to get the next selected view 27089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible, with a fading edge showing below as applicable. The amount is 27099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * capped at {@link #getMaxScrollAmount()} . 27109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 27119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 27129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 27139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextSelectedPosition The position of the next selection, or 27149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #INVALID_POSITION} if there is no next selectable position 27159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to scroll. Note: this is always positive! Direction 27169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needs to be taken into account when actually scrolling. 27179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 27189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int amountToScroll(int direction, int nextSelectedPosition) { 27199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 27209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top; 27219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27221ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho int numChildren = getChildCount(); 27239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 27259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int indexToMakeVisible = numChildren - 1; 27269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 27279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project indexToMakeVisible = nextSelectedPosition - mFirstPosition; 27289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27291ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho while (numChildren <= indexToMakeVisible) { 27301ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho // Child to view is not attached yet. 27311ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho addViewBelow(getChildAt(numChildren - 1), mFirstPosition + numChildren - 1); 27321ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho numChildren++; 27331ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho } 27349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionToMakeVisible = mFirstPosition + indexToMakeVisible; 27359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View viewToMakeVisible = getChildAt(indexToMakeVisible); 27369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int goalBottom = listBottom; 27389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionToMakeVisible < mItemCount - 1) { 27399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project goalBottom -= getArrowScrollPreviewLength(); 27409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewToMakeVisible.getBottom() <= goalBottom) { 27439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item is fully visible. 27449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 27459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION 27489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (goalBottom - viewToMakeVisible.getTop()) >= getMaxScrollAmount()) { 27499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item already has enough of it visible, changing selection is good enough 27509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 27519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = (viewToMakeVisible.getBottom() - goalBottom); 27549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mFirstPosition + numChildren) == mItemCount) { 27569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // last is last in list -> make sure we don't scroll past it 27579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int max = getChildAt(numChildren - 1).getBottom() - listBottom; 27589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = Math.min(amountToScroll, max); 27599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.min(amountToScroll, getMaxScrollAmount()); 27629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 27639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int indexToMakeVisible = 0; 27649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 27659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project indexToMakeVisible = nextSelectedPosition - mFirstPosition; 27669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27671ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho while (indexToMakeVisible < 0) { 27681ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho // Child to view is not attached yet. 27691ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho addViewAbove(getChildAt(0), mFirstPosition); 27701ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho mFirstPosition--; 27711ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho indexToMakeVisible = nextSelectedPosition - mFirstPosition; 27721ad11b9c6c7b555c27b917f26ecc08446f589284Justin Ho } 27739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionToMakeVisible = mFirstPosition + indexToMakeVisible; 27749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View viewToMakeVisible = getChildAt(indexToMakeVisible); 27759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int goalTop = listTop; 27769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionToMakeVisible > 0) { 27779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project goalTop += getArrowScrollPreviewLength(); 27789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewToMakeVisible.getTop() >= goalTop) { 27809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item is fully visible. 27819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 27829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION && 27859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewToMakeVisible.getBottom() - goalTop) >= getMaxScrollAmount()) { 27869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item already has enough of it visible, changing selection is good enough 27879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 27889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = (goalTop - viewToMakeVisible.getTop()); 27919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0) { 27929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first is first in list -> make sure we don't scroll past it 27939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int max = listTop - getChildAt(0).getTop(); 27949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = Math.min(amountToScroll, max); 27959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.min(amountToScroll, getMaxScrollAmount()); 27979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Holds results of focus aware arrow scrolling. 28029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static private class ArrowScrollFocusResult { 28049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mSelectedPosition; 28059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mAmountToScroll; 28069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * How {@link android.widget.ListView#arrowScrollFocused} returns its values. 28099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void populate(int selectedPosition, int amountToScroll) { 28119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition = selectedPosition; 28129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAmountToScroll = amountToScroll; 28139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSelectedPosition() { 28169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSelectedPosition; 28179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getAmountToScroll() { 28209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mAmountToScroll; 28219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 28269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 28279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The position of the next selectable position of the views that 28289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * are currently visible, taking into account the fact that there might 28299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be no selection. Returns {@link #INVALID_POSITION} if there is no 28309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selectable view on screen in the given direction. 28319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int lookForSelectablePositionOnScreen(int direction) { 28339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstPosition = mFirstPosition; 28349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 28359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int startPos = (mSelectedPosition != INVALID_POSITION) ? 28369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition + 1 : 28379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project firstPosition; 28389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos >= mAdapter.getCount()) { 28399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 28409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos < firstPosition) { 28429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startPos = firstPosition; 28439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePos = getLastVisiblePosition(); 28469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = getAdapter(); 28479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int pos = startPos; pos <= lastVisiblePos; pos++) { 28489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter.isEnabled(pos) 28499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) { 28509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return pos; 28519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 28549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int last = firstPosition + getChildCount() - 1; 28559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int startPos = (mSelectedPosition != INVALID_POSITION) ? 28569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition - 1 : 28579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project firstPosition + getChildCount() - 1; 28585d9d03a0234faa3cffd11502f973057045cafe82Dianne Hackborn if (startPos < 0 || startPos >= mAdapter.getCount()) { 28599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 28609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos > last) { 28629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startPos = last; 28639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = getAdapter(); 28669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int pos = startPos; pos >= firstPosition; pos--) { 28679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter.isEnabled(pos) 28689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) { 28699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return pos; 28709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 28749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Do an arrow scroll based on focus searching. If a new view is 28789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * given focus, return the selection delta and amount to scroll via 28799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an {@link ArrowScrollFocusResult}, otherwise, return null. 28809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 28819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 28829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 28839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The result if focus has changed, or <code>null</code>. 28849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrowScrollFocusResult arrowScrollFocused(final int direction) { 28869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View selectedView = getSelectedView(); 28879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocus; 28889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedView != null && selectedView.hasFocus()) { 28899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldFocus = selectedView.findFocus(); 28909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); 28919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 28929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 28939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean topFadingEdgeShowing = (mFirstPosition > 0); 28949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top + 28959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (topFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); 28969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int ySearchPoint = 28979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (selectedView != null && selectedView.getTop() > listTop) ? 28989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView.getTop() : 28999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listTop; 29009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.set(0, ySearchPoint, 0, ySearchPoint); 29019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 29029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean bottomFadingEdgeShowing = 29039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (mFirstPosition + getChildCount() - 1) < mItemCount; 29049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom - 29059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (bottomFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); 29069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int ySearchPoint = 29079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (selectedView != null && selectedView.getBottom() < listBottom) ? 29089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView.getBottom() : 29099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listBottom; 29109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.set(0, ySearchPoint, 0, ySearchPoint); 29119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); 29139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocus != null) { 29169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionOfNewFocus = positionOfNewFocus(newFocus); 29179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the focus change is in a different new position, make sure 29199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we aren't jumping over another selectable position 29209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { 29219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectablePosition = lookForSelectablePositionOnScreen(direction); 29229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectablePosition != INVALID_POSITION && 29239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ((direction == View.FOCUS_DOWN && selectablePosition < positionOfNewFocus) || 29249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (direction == View.FOCUS_UP && selectablePosition > positionOfNewFocus))) { 29259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 29269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); 29309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxScrollAmount = getMaxScrollAmount(); 29329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusScroll < maxScrollAmount) { 29339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // not moving too far, safe to give next view focus 29349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.requestFocus(direction); 29359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); 29369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mArrowScrollFocusResult; 29379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (distanceToView(newFocus) < maxScrollAmount){ 29389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Case to consider: 29399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // too far to get entire next focusable on screen, but by going 29409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // max scroll amount, we are getting it at least partially in view, 29419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so give it focus and scroll the max ammount. 29429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.requestFocus(direction); 29439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); 29449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mArrowScrollFocusResult; 29459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 29489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 29519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocus The view that would have focus. 29529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the position that contains newFocus 29539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int positionOfNewFocus(View newFocus) { 29559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 29569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numChildren; i++) { 29579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View child = getChildAt(i); 29589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isViewAncestorOf(newFocus, child)) { 29599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFirstPosition + i; 29609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("newFocus is not a child of any of the" 29639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + " children of the list!"); 29649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 29679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return true if child is an ancestor of parent, (or equal to the parent). 29689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isViewAncestorOf(View child, View parent) { 29709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 29719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 29729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 29759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewAncestorOf((View) theParent, parent); 29769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 29799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine how much we need to scroll in order to get newFocus in view. 29809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 29819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 29829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocus The view that would take focus. 29839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param positionOfNewFocus The position of the list item containing newFocus 29849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to scroll. Note: this is always positive! Direction 29859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needs to be taken into account when actually scrolling. 29869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int amountToScrollToNewFocus(int direction, View newFocus, int positionOfNewFocus) { 29889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = 0; 29899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.getDrawingRect(mTempRect); 29909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(newFocus, mTempRect); 29919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP) { 29929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.top < mListPadding.top) { 29939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = mListPadding.top - mTempRect.top; 29949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionOfNewFocus > 0) { 29959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll += getArrowScrollPreviewLength(); 29969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 29999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 30009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.bottom > listBottom) { 30019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = mTempRect.bottom - listBottom; 30029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionOfNewFocus < mItemCount - 1) { 30039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll += getArrowScrollPreviewLength(); 30049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return amountToScroll; 30089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 30119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine the distance to the nearest edge of a view in a particular 3012fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * direction. 3013fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * 30149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param descendant A descendant of this list. 30159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The distance, or 0 if the nearest edge is already on screen. 30169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 30179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int distanceToView(View descendant) { 30189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = 0; 30199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 30209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 30219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = mBottom - mTop - mListPadding.bottom; 30229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.bottom < mListPadding.top) { 30239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project distance = mListPadding.top - mTempRect.bottom; 30249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (mTempRect.top > listBottom) { 30259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project distance = mTempRect.top - listBottom; 30269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return distance; 30289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 30329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scroll the children by amount, adding a view at the end and removing 30339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views that fall off as necessary. 30349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 30359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param amount The amount (positive or negative) to scroll. 30369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 30379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollListItemsBy(int amount) { 30389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(amount); 30399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 30419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top; 3042c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project final AbsListView.RecycleBin recycleBin = mRecycler; 30439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (amount < 0) { 30459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // shifted items up 30469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may need to pan views into the bottom space 30489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numChildren = getChildCount(); 30499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View last = getChildAt(numChildren - 1); 30509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (last.getBottom() < listBottom) { 30519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePosition = mFirstPosition + numChildren - 1; 30529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastVisiblePosition < mItemCount - 1) { 30539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project last = addViewBelow(last, lastVisiblePosition); 30549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project numChildren++; 30559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 30569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 30579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may have brought in the last child of the list that is skinnier 30619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // than the fading edge, thereby leaving space at the end. need 30629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // to shift back 30639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (last.getBottom() < listBottom) { 30649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(listBottom - last.getBottom()); 30659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top views may be panned off screen 30689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View first = getChildAt(0); 30699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (first.getBottom() < listTop) { 3070c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project AbsListView.LayoutParams layoutParams = (LayoutParams) first.getLayoutParams(); 3071c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project if (recycleBin.shouldRecycleViewType(layoutParams.viewType)) { 3072079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(first, mFirstPosition); 3073c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } 3074158d6b70ac2f0c8fd7dafe0f865112090fb31699Mattias Niklewski detachViewFromParent(first); 30759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project first = getChildAt(0); 30769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition++; 30779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 30799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // shifted items down 30809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View first = getChildAt(0); 30819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may need to pan views into top 30839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ((first.getTop() > listTop) && (mFirstPosition > 0)) { 30849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project first = addViewAbove(first, mFirstPosition); 30859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition--; 30869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may have brought the very first child of the list in too far and 30899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to shift it back 30909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (first.getTop() > listTop) { 30919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(listTop - first.getTop()); 30929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastIndex = getChildCount() - 1; 30959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View last = getChildAt(lastIndex); 30969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // bottom view may be panned off screen 30989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (last.getTop() > listBottom) { 3099c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project AbsListView.LayoutParams layoutParams = (LayoutParams) last.getLayoutParams(); 3100c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project if (recycleBin.shouldRecycleViewType(layoutParams.viewType)) { 3101079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(last, mFirstPosition+lastIndex); 3102c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } 3103158d6b70ac2f0c8fd7dafe0f865112090fb31699Mattias Niklewski detachViewFromParent(last); 31049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project last = getChildAt(--lastIndex); 31059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View addViewAbove(View theView, int position) { 31109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int abovePosition = position - 1; 311121875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy View view = obtainView(abovePosition, mIsScrap); 31129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int edgeOfNewChild = theView.getTop() - mDividerHeight; 311321875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy setupChild(view, abovePosition, edgeOfNewChild, false, mListPadding.left, 311421875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy false, mIsScrap[0]); 31159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view; 31169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View addViewBelow(View theView, int position) { 31199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int belowPosition = position + 1; 312021875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy View view = obtainView(belowPosition, mIsScrap); 31219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int edgeOfNewChild = theView.getBottom() + mDividerHeight; 312221875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy setupChild(view, belowPosition, edgeOfNewChild, true, mListPadding.left, 312321875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy false, mIsScrap[0]); 31249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view; 31259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 31289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates that the views created by the ListAdapter can contain focusable 31299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. 31309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 31319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param itemsCanFocus true if items can get focus, false otherwise 31329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 31339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setItemsCanFocus(boolean itemsCanFocus) { 31349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemsCanFocus = itemsCanFocus; 31359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!itemsCanFocus) { 31369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS); 31379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 31419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the views created by the ListAdapter can contain focusable 31429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. 31439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 31449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean getItemsCanFocus() { 31459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mItemsCanFocus; 31469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 314924443ea3992e372e47daa50266b0f2ec38cac388Romain Guy public boolean isOpaque() { 31507840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase boolean retValue = (mCachingActive && mIsCacheColorOpaque && mDividerIsOpaque && 31518f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy hasOpaqueScrollbars()) || super.isOpaque(); 31527840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase if (retValue) { 31537840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase // only return true if the list items cover the entire area of the view 31543ba8f5d675831647e45d0ce11507c85dfb5f753bAdam Powell final int listTop = mListPadding != null ? mListPadding.top : mPaddingTop; 31557840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase View first = getChildAt(0); 31567840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase if (first == null || first.getTop() > listTop) { 31577840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase return false; 31587840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase } 31593ba8f5d675831647e45d0ce11507c85dfb5f753bAdam Powell final int listBottom = getHeight() - 31603ba8f5d675831647e45d0ce11507c85dfb5f753bAdam Powell (mListPadding != null ? mListPadding.bottom : mPaddingBottom); 31617840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase View last = getChildAt(getChildCount() - 1); 31627840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase if (last == null || last.getBottom() < listBottom) { 31637840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase return false; 31647840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase } 31657840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase } 31667840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase return retValue; 316724443ea3992e372e47daa50266b0f2ec38cac388Romain Guy } 316824443ea3992e372e47daa50266b0f2ec38cac388Romain Guy 316924443ea3992e372e47daa50266b0f2ec38cac388Romain Guy @Override 317024443ea3992e372e47daa50266b0f2ec38cac388Romain Guy public void setCacheColorHint(int color) { 31718f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy final boolean opaque = (color >>> 24) == 0xFF; 31728f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy mIsCacheColorOpaque = opaque; 31738f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy if (opaque) { 3174a02903fbee6725563da4472bd120f844e9d5518cRomain Guy if (mDividerPaint == null) { 3175a02903fbee6725563da4472bd120f844e9d5518cRomain Guy mDividerPaint = new Paint(); 3176a02903fbee6725563da4472bd120f844e9d5518cRomain Guy } 31778f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy mDividerPaint.setColor(color); 31788f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy } 317924443ea3992e372e47daa50266b0f2ec38cac388Romain Guy super.setCacheColorHint(color); 318024443ea3992e372e47daa50266b0f2ec38cac388Romain Guy } 3181637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3182637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell void drawOverscrollHeader(Canvas canvas, Drawable drawable, Rect bounds) { 3183637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int height = drawable.getMinimumHeight(); 3184637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3185637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.save(); 3186637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.clipRect(bounds); 3187637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3188637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int span = bounds.bottom - bounds.top; 3189637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (span < height) { 3190637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bounds.bottom - height; 3191637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3192637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3193637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.setBounds(bounds); 3194637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.draw(canvas); 3195637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3196637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restore(); 3197637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3198637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3199637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell void drawOverscrollFooter(Canvas canvas, Drawable drawable, Rect bounds) { 3200637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int height = drawable.getMinimumHeight(); 3201637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3202637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.save(); 3203637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.clipRect(bounds); 3204637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3205637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int span = bounds.bottom - bounds.top; 3206637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (span < height) { 3207637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = bounds.top + height; 3208637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3209637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3210637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.setBounds(bounds); 3211637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.draw(canvas); 3212637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3213637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restore(); 3214637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3215637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 321624443ea3992e372e47daa50266b0f2ec38cac388Romain Guy @Override 32179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void dispatchDraw(Canvas canvas) { 32180211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy if (mCachingStarted) { 32190211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy mCachingActive = true; 32200211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy } 32210211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy 32229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the dividers 32239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 3224637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable overscrollHeader = mOverScrollHeader; 3225637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable overscrollFooter = mOverScrollFooter; 3226637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final boolean drawOverscrollHeader = overscrollHeader != null; 3227637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final boolean drawOverscrollFooter = overscrollFooter != null; 3228bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell final boolean drawDividers = dividerHeight > 0 && mDivider != null; 32299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3230637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawDividers || drawOverscrollHeader || drawOverscrollFooter) { 32319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Only modify the top and bottom in the loop, we set the left and right here 32329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Rect bounds = mTempRect; 32339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.left = mPaddingLeft; 32349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.right = mRight - mLeft - mPaddingRight; 32359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = getChildCount(); 32379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int headerCount = mHeaderViewInfos.size(); 3238bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell final int itemCount = mItemCount; 3239b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final int footerLimit = (itemCount - mFooterViewInfos.size()); 32409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean headerDividers = mHeaderDividersEnabled; 32419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean footerDividers = mFooterDividersEnabled; 32429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int first = mFirstPosition; 32432bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy final boolean areAllItemsSelectable = mAreAllItemsSelectable; 32442bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy final ListAdapter adapter = mAdapter; 3245e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // If the list is opaque *and* the background is not, we want to 3246e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // fill a rect where the dividers would be for non-selectable items 3247e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // If the list is opaque and the background is also opaque, we don't 3248e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // need to draw anything since the background will do it for us 3249179de8a37cb886e61264d2b7efd5bd4f29a5b381Romain Guy final boolean fillForMissingDividers = isOpaque() && !super.isOpaque(); 3250e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy 3251e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy if (fillForMissingDividers && mDividerPaint == null && mIsCacheColorOpaque) { 3252a02903fbee6725563da4472bd120f844e9d5518cRomain Guy mDividerPaint = new Paint(); 3253e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy mDividerPaint.setColor(getCacheColorHint()); 3254a02903fbee6725563da4472bd120f844e9d5518cRomain Guy } 32558f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy final Paint paint = mDividerPaint; 32569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32579456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell int effectivePaddingTop = 0; 32589456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell int effectivePaddingBottom = 0; 32599456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 32609456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell effectivePaddingTop = mListPadding.top; 32619456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell effectivePaddingBottom = mListPadding.bottom; 32629456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell } 32639456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell 32649456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell final int listBottom = mBottom - mTop - effectivePaddingBottom + mScrollY; 32659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 3266637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int bottom = 0; 32670b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell 3268637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Draw top divider or header for overscroll 3269637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollY = mScrollY; 3270637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (count > 0 && scrollY < 0) { 3271637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawOverscrollHeader) { 3272637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = 0; 3273637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = scrollY; 3274637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollHeader(canvas, overscrollHeader, bounds); 3275637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (drawDividers) { 3276637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = 0; 3277637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = -dividerHeight; 3278637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawDivider(canvas, bounds, -1); 3279637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3280637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3281637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 32829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 3283b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final int itemIndex = (first + i); 3284b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final boolean isHeader = (itemIndex < headerCount); 3285b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final boolean isFooter = (itemIndex >= footerLimit); 3286b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette if ((headerDividers || !isHeader) && (footerDividers || !isFooter)) { 3287b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final View child = getChildAt(i); 32889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottom = child.getBottom(); 3289b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final boolean isLastItem = (i == (count - 1)); 3290b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette 3291b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette if (drawDividers && (bottom < listBottom) 3292b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette && !(drawOverscrollFooter && isLastItem)) { 3293b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final int nextIndex = (itemIndex + 1); 329420cc605b69a017316112929666255226c184a376Alan Viverette // Draw dividers between enabled items, headers 329520cc605b69a017316112929666255226c184a376Alan Viverette // and/or footers when enabled and requested, and 329620cc605b69a017316112929666255226c184a376Alan Viverette // after the last enabled item. 329720cc605b69a017316112929666255226c184a376Alan Viverette if (adapter.isEnabled(itemIndex) && (headerDividers || !isHeader 329820cc605b69a017316112929666255226c184a376Alan Viverette && (nextIndex >= headerCount)) && (isLastItem 329920cc605b69a017316112929666255226c184a376Alan Viverette || adapter.isEnabled(nextIndex) && (footerDividers || !isFooter 330020cc605b69a017316112929666255226c184a376Alan Viverette && (nextIndex < footerLimit)))) { 3301637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bottom; 3302637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = bottom + dividerHeight; 3303637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawDivider(canvas, bounds, i); 3304637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (fillForMissingDividers) { 3305637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bottom; 3306637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = bottom + dividerHeight; 3307637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.drawRect(bounds, paint); 3308637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 33099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3312637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3313637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overFooterBottom = mBottom + mScrollY; 3314637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawOverscrollFooter && first + count == itemCount && 3315637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell overFooterBottom > bottom) { 3316637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bottom; 3317637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = overFooterBottom; 3318637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollFooter(canvas, overscrollFooter, bounds); 3319637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 33209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 33219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int top; 33229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3323bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell final int scrollY = mScrollY; 3324bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 3325637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (count > 0 && drawOverscrollHeader) { 3326637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = scrollY; 3327637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = getChildAt(0).getTop(); 3328637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollHeader(canvas, overscrollHeader, bounds); 3329637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3330637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3331637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int start = drawOverscrollHeader ? 1 : 0; 3332637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell for (int i = start; i < count; i++) { 3333b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final int itemIndex = (first + i); 3334b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final boolean isHeader = (itemIndex < headerCount); 3335b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final boolean isFooter = (itemIndex >= footerLimit); 3336b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette if ((headerDividers || !isHeader) && (footerDividers || !isFooter)) { 3337b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final View child = getChildAt(i); 33389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project top = child.getTop(); 3339b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette if (drawDividers && (top > effectivePaddingTop)) { 3340b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final boolean isFirstItem = (i == start); 3341b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette final int previousIndex = (itemIndex - 1); 334220cc605b69a017316112929666255226c184a376Alan Viverette // Draw dividers between enabled items, headers 334320cc605b69a017316112929666255226c184a376Alan Viverette // and/or footers when enabled and requested, and 334420cc605b69a017316112929666255226c184a376Alan Viverette // before the first enabled item. 334520cc605b69a017316112929666255226c184a376Alan Viverette if (adapter.isEnabled(itemIndex) && (headerDividers || !isHeader 334620cc605b69a017316112929666255226c184a376Alan Viverette && (previousIndex >= headerCount)) && (isFirstItem || 334720cc605b69a017316112929666255226c184a376Alan Viverette adapter.isEnabled(previousIndex) && (footerDividers || !isFooter 334820cc605b69a017316112929666255226c184a376Alan Viverette && (previousIndex < footerLimit)))) { 33498f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.top = top - dividerHeight; 33508f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.bottom = top; 3351b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette // Give the method the child ABOVE the divider, 3352b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette // so we subtract one from our child position. 3353b9fc4b879bab5640038fb09b40133611f91d7274Alan Viverette // Give -1 when there is no child above the 33548f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy // divider. 33558f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy drawDivider(canvas, bounds, i - 1); 3356e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy } else if (fillForMissingDividers) { 33578f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.top = top - dividerHeight; 33588f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.bottom = top; 33598f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy canvas.drawRect(bounds, paint); 33608f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy } 33619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3364bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 3365179de8a37cb886e61264d2b7efd5bd4f29a5b381Romain Guy if (count > 0 && scrollY > 0) { 3366637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawOverscrollFooter) { 3367637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int absListBottom = mBottom; 3368637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = absListBottom; 3369637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = absListBottom + scrollY; 3370637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollFooter(canvas, overscrollFooter, bounds); 3371637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (drawDividers) { 3372637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = listBottom; 3373637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = listBottom + dividerHeight; 3374637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawDivider(canvas, bounds, -1); 3375637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3376bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell } 33779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 33809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the indicators (these should be drawn above the dividers) and children 33819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.dispatchDraw(canvas); 33829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 33840211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy @Override 33850211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy protected boolean drawChild(Canvas canvas, View child, long drawingTime) { 33860211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy boolean more = super.drawChild(canvas, child, drawingTime); 33870211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy if (mCachingActive && child.mCachingFailed) { 33880211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy mCachingActive = false; 33890211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy } 33900211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy return more; 33910211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy } 33920211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy 33939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 33949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Draws a divider for the given child in the given bounds. 33959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 33969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param canvas The canvas to draw to. 33979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bounds The bounds of the divider. 33989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childIndex The index of child (of the View) above the divider. 33999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This will be -1 if there is no child above the divider to be 34009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drawn. 34019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void drawDivider(Canvas canvas, Rect bounds, int childIndex) { 34039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This widget draws the same divider for all children 34049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Drawable divider = mDivider; 34059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 340695930e13faac8c17dabfaa1478089baa772f091bRomain Guy divider.setBounds(bounds); 34079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project divider.draw(canvas); 34089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 34119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the drawable that will be drawn between each item in the list. 34129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the current drawable drawn between list elements 34149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Drawable getDivider() { 34169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDivider; 34179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 34209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the drawable that will be drawn between each item in the list. If the drawable does 34219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not have an intrinsic height, you should also call {@link #setDividerHeight(int)} 34229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param divider The drawable to use. 34249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setDivider(Drawable divider) { 34269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (divider != null) { 34279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = divider.getIntrinsicHeight(); 34289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 34299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = 0; 34309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDivider = divider; 343224443ea3992e372e47daa50266b0f2ec38cac388Romain Guy mDividerIsOpaque = divider == null || divider.getOpacity() == PixelFormat.OPAQUE; 3433eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy requestLayout(); 3434eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy invalidate(); 34359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 34389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns the height of the divider that will be drawn between each item in the list. 34399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getDividerHeight() { 34419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDividerHeight; 34429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 34459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the height of the divider that will be drawn between each item in the list. Calling 34469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this will override the intrinsic height as set by {@link #setDivider(Drawable)} 34479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The new height of the divider in pixels. 34499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setDividerHeight(int height) { 34519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = height; 3452eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy requestLayout(); 3453eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy invalidate(); 34549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 34579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Enables or disables the drawing of the divider for header views. 34589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param headerDividersEnabled True to draw the headers, false otherwise. 34609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setFooterDividersEnabled(boolean) 34625542103589696e2945b5fe5e251292873e3af897Alan Viverette * @see #areHeaderDividersEnabled() 34639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addHeaderView(android.view.View) 34649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setHeaderDividersEnabled(boolean headerDividersEnabled) { 34669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderDividersEnabled = headerDividersEnabled; 34679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 34689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 34715542103589696e2945b5fe5e251292873e3af897Alan Viverette * @return Whether the drawing of the divider for header views is enabled 34725542103589696e2945b5fe5e251292873e3af897Alan Viverette * 34735542103589696e2945b5fe5e251292873e3af897Alan Viverette * @see #setHeaderDividersEnabled(boolean) 34745542103589696e2945b5fe5e251292873e3af897Alan Viverette */ 34755542103589696e2945b5fe5e251292873e3af897Alan Viverette public boolean areHeaderDividersEnabled() { 34765542103589696e2945b5fe5e251292873e3af897Alan Viverette return mHeaderDividersEnabled; 34775542103589696e2945b5fe5e251292873e3af897Alan Viverette } 34785542103589696e2945b5fe5e251292873e3af897Alan Viverette 34795542103589696e2945b5fe5e251292873e3af897Alan Viverette /** 34809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Enables or disables the drawing of the divider for footer views. 34819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param footerDividersEnabled True to draw the footers, false otherwise. 34839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setHeaderDividersEnabled(boolean) 34855542103589696e2945b5fe5e251292873e3af897Alan Viverette * @see #areFooterDividersEnabled() 34869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addFooterView(android.view.View) 34879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFooterDividersEnabled(boolean footerDividersEnabled) { 34899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterDividersEnabled = footerDividersEnabled; 34909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 34919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34925542103589696e2945b5fe5e251292873e3af897Alan Viverette 34935542103589696e2945b5fe5e251292873e3af897Alan Viverette /** 34945542103589696e2945b5fe5e251292873e3af897Alan Viverette * @return Whether the drawing of the divider for footer views is enabled 34955542103589696e2945b5fe5e251292873e3af897Alan Viverette * 34965542103589696e2945b5fe5e251292873e3af897Alan Viverette * @see #setFooterDividersEnabled(boolean) 34975542103589696e2945b5fe5e251292873e3af897Alan Viverette */ 34985542103589696e2945b5fe5e251292873e3af897Alan Viverette public boolean areFooterDividersEnabled() { 34995542103589696e2945b5fe5e251292873e3af897Alan Viverette return mFooterDividersEnabled; 35005542103589696e2945b5fe5e251292873e3af897Alan Viverette } 3501bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 3502637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3503637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * Sets the drawable that will be drawn above all other list content. 3504637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * This area can become visible when the user overscrolls the list. 3505637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * 3506637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @param header The drawable to use 3507637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3508637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverscrollHeader(Drawable header) { 3509637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverScrollHeader = header; 3510637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScrollY < 0) { 3511637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 3512637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3513637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3514637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3515637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3516637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @return The drawable that will be drawn above all other list content 3517637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3518637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public Drawable getOverscrollHeader() { 3519637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return mOverScrollHeader; 3520637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3521637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3522637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3523637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * Sets the drawable that will be drawn below all other list content. 3524637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * This area can become visible when the user overscrolls the list, 3525637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * or when the list's content does not fully fill the container area. 3526637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * 3527637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @param footer The drawable to use 3528637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3529637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverscrollFooter(Drawable footer) { 3530637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverScrollFooter = footer; 3531637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 3532637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3533637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3534637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3535637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @return The drawable that will be drawn below all other list content 3536637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3537637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public Drawable getOverscrollFooter() { 3538637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return mOverScrollFooter; 3539637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3540637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 35419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 35429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { 35439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 35449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3545e1bf486846ce7589727ad84440bd9a2d42751055Adam Powell final ListAdapter adapter = mAdapter; 35469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int closetChildIndex = -1; 3547dcce1216b0066f3f9ed1b01a485684e8617e7ea4Adam Powell int closestChildTop = 0; 3548e1bf486846ce7589727ad84440bd9a2d42751055Adam Powell if (adapter != null && gainFocus && previouslyFocusedRect != null) { 35499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect.offset(mScrollX, mScrollY); 35509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3551d7507834e73f32b4c82839036dc3897a1587e668Adam Powell // Don't cache the result of getChildCount or mFirstPosition here, 3552d7507834e73f32b4c82839036dc3897a1587e668Adam Powell // it could change in layoutChildren. 3553d7507834e73f32b4c82839036dc3897a1587e668Adam Powell if (adapter.getCount() < getChildCount() + mFirstPosition) { 3554c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell mLayoutMode = LAYOUT_NORMAL; 3555c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell layoutChildren(); 3556c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell } 3557c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell 35589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // figure out which item should be selected based on previously 35599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // focused rect 35609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect otherRect = mTempRect; 35619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int minDistance = Integer.MAX_VALUE; 35629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 3563d7507834e73f32b4c82839036dc3897a1587e668Adam Powell final int firstPosition = mFirstPosition; 35649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < childCount; i++) { 35669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // only consider selectable views 35679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!adapter.isEnabled(firstPosition + i)) { 35689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 35699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View other = getChildAt(i); 35729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project other.getDrawingRect(otherRect); 35739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(other, otherRect); 35749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = getDistance(previouslyFocusedRect, otherRect, direction); 35759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (distance < minDistance) { 35779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project minDistance = distance; 35789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closetChildIndex = i; 3579dcce1216b0066f3f9ed1b01a485684e8617e7ea4Adam Powell closestChildTop = other.getTop(); 35809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (closetChildIndex >= 0) { 3585dcce1216b0066f3f9ed1b01a485684e8617e7ea4Adam Powell setSelectionFromTop(closetChildIndex + mFirstPosition, closestChildTop); 35869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 35879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 35889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 35939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (non-Javadoc) 35949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 35959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Children specified in XML are assumed to be header views. After we have 35969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * parsed them move them out of the children list and into mHeaderViews. 35979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 35989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 35999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFinishInflate() { 36009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFinishInflate(); 36019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 36039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 36049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; ++i) { 36059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addHeaderView(getChildAt(i)); 36069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeAllViews(); 36089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 36129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#findViewById(int) 36139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * First look in our children, then in any header and footer views that may be scrolled off. 36149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 36159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 36169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected View findViewTraversal(int id) { 36179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 36189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = super.findViewTraversal(id); 36199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v == null) { 36209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewInHeadersOrFooters(mHeaderViewInfos, id); 36219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 36229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewInHeadersOrFooters(mFooterViewInfos, id); 36259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 36269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 36339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 36349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Look in the passed in list of headers or footers for the view. 36359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 36369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View findViewInHeadersOrFooters(ArrayList<FixedViewInfo> where, int id) { 36379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (where != null) { 36389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 36399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 36409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; i++) { 36429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = where.get(i).view; 36439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!v.isRootNamespace()) { 36459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = v.findViewById(id); 36469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 36489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 36549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 36574e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * @see android.view.View#findViewWithTag(Object) 36589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * First look in our children, then in any header and footer views that may be scrolled off. 36599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 36609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 36619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected View findViewWithTagTraversal(Object tag) { 36629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 36639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = super.findViewWithTagTraversal(tag); 36649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v == null) { 36654e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = findViewWithTagInHeadersOrFooters(mHeaderViewInfos, tag); 36669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 36679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36704e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = findViewWithTagInHeadersOrFooters(mFooterViewInfos, tag); 36719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 36729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 36799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 36809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Look in the passed in list of headers or footers for the view with the tag. 36819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 36824e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View findViewWithTagInHeadersOrFooters(ArrayList<FixedViewInfo> where, Object tag) { 36839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (where != null) { 36849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 36859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 36869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; i++) { 36889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = where.get(i).view; 36899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!v.isRootNamespace()) { 36919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = v.findViewWithTag(tag); 36929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 36939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 36949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 36959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 36999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 37009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 37019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 37024e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown /** 37034e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * @hide 37044e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * @see android.view.View#findViewByPredicate(Predicate) 37054e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * First look in our children, then in any header and footer views that may be scrolled off. 37064e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown */ 37074e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown @Override 37084dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { 37094e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View v; 37104dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown v = super.findViewByPredicateTraversal(predicate, childToSkip); 37114e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v == null) { 37124dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown v = findViewByPredicateInHeadersOrFooters(mHeaderViewInfos, predicate, childToSkip); 37134e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v != null) { 37144e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 37154e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37164e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 37174dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown v = findViewByPredicateInHeadersOrFooters(mFooterViewInfos, predicate, childToSkip); 37184e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v != null) { 37194e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 37204e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37214e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37224e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 37234e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37244e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 37254e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown /* (non-Javadoc) 37264e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * 37274e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * Look in the passed in list of headers or footers for the first view that matches 37284e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * the predicate. 37294e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown */ 37304e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View findViewByPredicateInHeadersOrFooters(ArrayList<FixedViewInfo> where, 37314dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown Predicate<View> predicate, View childToSkip) { 37324e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (where != null) { 37334e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown int len = where.size(); 37344e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View v; 37354e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 37364e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown for (int i = 0; i < len; i++) { 37374e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = where.get(i).view; 37384e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 37394dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown if (v != childToSkip && !v.isRootNamespace()) { 37404e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = v.findViewByPredicate(predicate); 37414e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 37424e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v != null) { 37434e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 37444e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37454e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37464e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37474e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37484e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return null; 37494e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 37504e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 37519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3752fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * Returns the set of checked items ids. The result is only valid if the 37538f1bfe1a7cef702fd74e5405443e9fdb7c5e7556Adam Powell * choice mode has not been set to {@link #CHOICE_MODE_NONE}. 3754fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * 3755fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * @return A new array which contains the id of each checked item in the 3756fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * list. 37578f1bfe1a7cef702fd74e5405443e9fdb7c5e7556Adam Powell * 3758463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell * @deprecated Use {@link #getCheckedItemIds()} instead. 3759ad28bed52ccabd252149b5297a2d94bacdb388ccRomain Guy */ 37608350f7dbc3a62211b2891f35911e4073d24c4cc5Adam Powell @Deprecated 3761ad28bed52ccabd252149b5297a2d94bacdb388ccRomain Guy public long[] getCheckItemIds() { 3762463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Use new behavior that correctly handles stable ID mapping. 3763463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (mAdapter != null && mAdapter.hasStableIds()) { 3764463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return getCheckedItemIds(); 3765463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3766463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3767463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Old behavior was buggy, but would sort of work for adapters without stable IDs. 3768463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Fall back to it to support legacy apps. 3769463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null && mAdapter != null) { 3770463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final SparseBooleanArray states = mCheckStates; 3771463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final int count = states.size(); 3772463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final long[] ids = new long[count]; 3773463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final ListAdapter adapter = mAdapter; 3774463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3775463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell int checkedCount = 0; 3776463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell for (int i = 0; i < count; i++) { 3777463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (states.valueAt(i)) { 3778463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell ids[checkedCount++] = adapter.getItemId(states.keyAt(i)); 3779463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3780463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3781463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3782463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Trim array if needed. mCheckStates may contain false values 3783463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // resulting in checkedCount being smaller than count. 3784463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (checkedCount == count) { 3785463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return ids; 3786463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } else { 3787463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final long[] result = new long[checkedCount]; 3788463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell System.arraycopy(ids, 0, result, 0, checkedCount); 3789463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3790463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return result; 3791463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3792463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3793463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return new long[0]; 37948f1bfe1a7cef702fd74e5405443e9fdb7c5e7556Adam Powell } 37958a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov 37968a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov @Override 3797441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette int getHeightForPosition(int position) { 3798441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int height = super.getHeightForPosition(position); 3799441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if (shouldAdjustHeightForDivider(position)) { 3800441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette return height + mDividerHeight; 3801441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3802441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette return height; 3803441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3804441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette 3805441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette private boolean shouldAdjustHeightForDivider(int itemIndex) { 3806441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int dividerHeight = mDividerHeight; 3807441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final Drawable overscrollHeader = mOverScrollHeader; 3808441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final Drawable overscrollFooter = mOverScrollFooter; 3809441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean drawOverscrollHeader = overscrollHeader != null; 3810441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean drawOverscrollFooter = overscrollFooter != null; 3811441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean drawDividers = dividerHeight > 0 && mDivider != null; 3812441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette 3813441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if (drawDividers) { 3814441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean fillForMissingDividers = isOpaque() && !super.isOpaque(); 3815441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int itemCount = mItemCount; 3816441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int headerCount = mHeaderViewInfos.size(); 3817441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int footerLimit = (itemCount - mFooterViewInfos.size()); 3818441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean isHeader = (itemIndex < headerCount); 3819441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean isFooter = (itemIndex >= footerLimit); 3820441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean headerDividers = mHeaderDividersEnabled; 3821441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean footerDividers = mFooterDividersEnabled; 3822441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if ((headerDividers || !isHeader) && (footerDividers || !isFooter)) { 3823441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final ListAdapter adapter = mAdapter; 3824441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if (!mStackFromBottom) { 3825441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean isLastItem = (itemIndex == (itemCount - 1)); 3826441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if (!drawOverscrollFooter || !isLastItem) { 3827441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int nextIndex = itemIndex + 1; 3828441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette // Draw dividers between enabled items, headers 3829441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette // and/or footers when enabled and requested, and 3830441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette // after the last enabled item. 3831441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if (adapter.isEnabled(itemIndex) && (headerDividers || !isHeader 3832441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette && (nextIndex >= headerCount)) && (isLastItem 3833441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette || adapter.isEnabled(nextIndex) && (footerDividers || !isFooter 3834441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette && (nextIndex < footerLimit)))) { 3835441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette return true; 3836441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } else if (fillForMissingDividers) { 3837441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette return true; 3838441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3839441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3840441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } else { 3841441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int start = drawOverscrollHeader ? 1 : 0; 3842441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final boolean isFirstItem = (itemIndex == start); 3843441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if (!isFirstItem) { 3844441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette final int previousIndex = (itemIndex - 1); 3845441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette // Draw dividers between enabled items, headers 3846441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette // and/or footers when enabled and requested, and 3847441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette // before the first enabled item. 3848441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette if (adapter.isEnabled(itemIndex) && (headerDividers || !isHeader 3849441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette && (previousIndex >= headerCount)) && (isFirstItem || 3850441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette adapter.isEnabled(previousIndex) && (footerDividers || !isFooter 3851441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette && (previousIndex < footerLimit)))) { 3852441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette return true; 3853441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } else if (fillForMissingDividers) { 3854441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette return true; 3855441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3856441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3857441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3858441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3859441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3860441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette 3861441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette return false; 3862441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3863441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette 3864441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette @Override 3865d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette AbsPositionScroller createPositionScroller() { 3866d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette return new ListViewPositionScroller(); 3867441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette } 3868441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette 3869441b437b72dd92c1267c4f2cce5f28337e51cd2cAlan Viverette @Override 38708a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 38718a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov super.onInitializeAccessibilityEvent(event); 38728a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov event.setClassName(ListView.class.getName()); 38738a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov } 38748a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov 38758a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov @Override 38768a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 38778a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov super.onInitializeAccessibilityNodeInfo(info); 38788a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov info.setClassName(ListView.class.getName()); 38795b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette 38805b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette final int count = getCount(); 388176769ae02e713f50816ee67ff618b748d95050a8Alan Viverette final int selectionMode = getSelectionModeForAccessibility(); 388276769ae02e713f50816ee67ff618b748d95050a8Alan Viverette final CollectionInfo collectionInfo = CollectionInfo.obtain(1, count, false, selectionMode); 38835b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette info.setCollectionInfo(collectionInfo); 38845b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette } 38855b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette 38865b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette @Override 38875b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette public void onInitializeAccessibilityNodeInfoForItem( 38885b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette View view, int position, AccessibilityNodeInfo info) { 38895b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette super.onInitializeAccessibilityNodeInfoForItem(view, position, info); 38905b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette 38915b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette final LayoutParams lp = (LayoutParams) view.getLayoutParams(); 38925b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette final boolean isHeading = lp != null && lp.viewType != ITEM_VIEW_TYPE_HEADER_OR_FOOTER; 389376769ae02e713f50816ee67ff618b748d95050a8Alan Viverette final boolean isSelected = isItemChecked(position); 389476769ae02e713f50816ee67ff618b748d95050a8Alan Viverette final CollectionItemInfo itemInfo = CollectionItemInfo.obtain( 389576769ae02e713f50816ee67ff618b748d95050a8Alan Viverette 0, 1, position, 1, isHeading, isSelected); 38965b2081dc41cccd76780a2cb4e9a973505c13446cAlan Viverette info.setCollectionItemInfo(itemInfo); 38978a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov } 3898d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette 3899d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette /** 3900d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette * Sub-position scroller that understands the layout of a ListView. 3901d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette */ 3902d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette class ListViewPositionScroller extends AbsSubPositionScroller { 3903d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette @Override 3904d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette public int getRowForPosition(int position) { 3905d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette return position; 3906d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette } 3907d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette 3908d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette @Override 3909d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette public int getFirstPositionForRow(int row) { 3910d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette return row; 3911d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette } 3912d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette 3913d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette @Override 3914d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette public int getHeightForRow(int row) { 3915d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette return getHeightForPosition(row); 3916d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette } 3917d22db216fe7da01d70d4db3b3e76797aea64e956Alan Viverette } 39189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 3919