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 19fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport com.android.internal.R; 204e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brownimport com.android.internal.util.Predicate; 21fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport com.google.android.collect.Lists; 22fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 24499cb9f516062b654952d282f211bee44c31a3c2Winson Chungimport android.content.Intent; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Canvas; 278f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guyimport android.graphics.Paint; 28fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.graphics.PixelFormat; 29fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.graphics.Rect; 30fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.graphics.drawable.Drawable; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.SparseBooleanArray; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.FocusFinder; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.KeyEvent; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.MotionEvent; 36fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunneimport android.view.SoundEffectConstants; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewDebug; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 4175986cf9bc57ef11ad70f36fb77fbbf5d63af6ecsvetoslavganovimport android.view.accessibility.AccessibilityEvent; 42499cb9f516062b654952d282f211bee44c31a3c2Winson Chungimport android.widget.RemoteViews.RemoteView; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.ArrayList; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Implementation Notes: 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Some terminology: 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * index - index of the items that are currently visible 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position - index of the items in the cursor 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A view that shows items in a vertically scrolling list. The items 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * come from the {@link ListAdapter} associated with this view. 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6041ec65355bd6ded652769725b276d47c54a0d913Scott Main * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-listview.html">List View 6141ec65355bd6ded652769725b276d47c54a0d913Scott Main * tutorial</a>.</p> 6241ec65355bd6ded652769725b276d47c54a0d913Scott Main * 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_entries 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_divider 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_dividerHeight 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_headerDividersEnabled 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_footerDividersEnabled 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 69499cb9f516062b654952d282f211bee44c31a3c2Winson Chung@RemoteView 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ListView extends AbsListView { 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Used to indicate a no preference for a position type. 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final int NO_POSITION = -1; 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When arrow scrolling, ListView will never scroll more than this factor 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * times the height of the list. 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final float MAX_SCROLL_FACTOR = 0.33f; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When arrow scrolling, need a certain amount of pixels to preview next 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. This is usually the fading edge, but if that is small enough, 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * we want to make sure we preview at least this many pixels. 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int MIN_SCROLL_PREVIEW_PIXELS = 2; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A class that represents a fixed view in a list, for example a header at the top 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or a footer at the bottom. 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public class FixedViewInfo { 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** The view to add to the list */ 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public View view; 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** The data backing the view. This is returned from {@link ListAdapter#getItem(int)}. */ 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Object data; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** <code>true</code> if the fixed view should be selectable in the list */ 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSelectable; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrayList<FixedViewInfo> mHeaderViewInfos = Lists.newArrayList(); 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrayList<FixedViewInfo> mFooterViewInfos = Lists.newArrayList(); 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Drawable mDivider; 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mDividerHeight; 107fb60386b46d0c6216c765c10bd33ac42ca780917Adam Cohen 108637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Drawable mOverScrollHeader; 109637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Drawable mOverScrollFooter; 110637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 11124443ea3992e372e47daa50266b0f2ec38cac388Romain Guy private boolean mIsCacheColorOpaque; 11224443ea3992e372e47daa50266b0f2ec38cac388Romain Guy private boolean mDividerIsOpaque; 11324443ea3992e372e47daa50266b0f2ec38cac388Romain Guy 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mHeaderDividersEnabled; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mFooterDividersEnabled; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mAreAllItemsSelectable = true; 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mItemsCanFocus = false; 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // used for temporary calculations. 122c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project private final Rect mTempRect = new Rect(); 123a02903fbee6725563da4472bd120f844e9d5518cRomain Guy private Paint mDividerPaint; 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // the single allocated result per list view; kinda cheesey but avoids 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // allocating these thingies too often. 1279c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy private final ArrowScrollFocusResult mArrowScrollFocusResult = new ArrowScrollFocusResult(); 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1299bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell // Keeps focused children visible through resizes 1309bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private FocusSelector mFocusSelector; 1318350f7dbc3a62211b2891f35911e4073d24c4cc5Adam Powell 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context) { 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context, AttributeSet attrs) { 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.listViewStyle); 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context, AttributeSet attrs, int defStyle) { 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = context.obtainStyledAttributes(attrs, 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView, defStyle, 0); 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CharSequence[] entries = a.getTextArray( 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView_entries); 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entries != null) { 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setAdapter(new ArrayAdapter<CharSequence>(context, 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.layout.simple_list_item_1, entries)); 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Drawable d = a.getDrawable(com.android.internal.R.styleable.ListView_divider); 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (d != null) { 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If a divider is specified use its intrinsic height for divider height 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDivider(d); 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 158bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 159637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable osHeader = a.getDrawable( 160637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell com.android.internal.R.styleable.ListView_overScrollHeader); 161637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (osHeader != null) { 162637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell setOverscrollHeader(osHeader); 163637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 164637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 165637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable osFooter = a.getDrawable( 166637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell com.android.internal.R.styleable.ListView_overScrollFooter); 167637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (osFooter != null) { 168637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell setOverscrollFooter(osFooter); 169637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 170637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Use the height specified, zero being the default 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = a.getDimensionPixelSize( 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView_dividerHeight, 0); 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dividerHeight != 0) { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDividerHeight(dividerHeight); 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderDividersEnabled = a.getBoolean(R.styleable.ListView_headerDividersEnabled, true); 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterDividersEnabled = a.getBoolean(R.styleable.ListView_footerDividersEnabled, true); 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount a list view will scroll in response to 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mBottom - mTop)); 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Make sure views are touching the top or bottom edge, as appropriate for 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * our gravity 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void adjustViewsUpOrDown() { 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta; 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Uh-oh -- we came up short. Slide all views up to make them 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // align with the top 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = getChildAt(0); 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = child.getTop() - mListPadding.top; 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition != 0) { 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's OK to have some space above the first item if it is 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // part of the vertical spacing 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta -= mDividerHeight; 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta < 0) { 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We only are looking to see if we are too low, not too high 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = 0; 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we are too high, slide all views down to align with bottom 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = getChildAt(childCount - 1); 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = child.getBottom() - (getHeight() - mListPadding.bottom); 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition + childCount < mItemCount) { 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's OK to have some space below the last item if it is 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // part of the vertical spacing 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta += mDividerHeight; 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = 0; 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(-delta); 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the top of the list. If addHeaderView is 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * NOTE: Call this before calling setAdapter. This is so ListView can wrap 245176f9fc215194411cf0461a178d77fa57486112bGilles Debunne * the supplied cursor with one that will also account for header and footer 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views. 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param data Data to associate with this view 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isSelectable whether the item is selectable 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addHeaderView(View v, Object data, boolean isSelectable) { 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25422c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen if (mAdapter != null && ! (mAdapter instanceof HeaderViewListAdapter)) { 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException( 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Cannot add header view to list -- setAdapter has already been called."); 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FixedViewInfo info = new FixedViewInfo(); 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.view = v; 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.data = data; 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.isSelectable = isSelectable; 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderViewInfos.add(info); 26422c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen 26522c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen // in the case of re-adding a header view, or adding one later on, 26622c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen // we need to notify the observer 267247a0f0a16f956c463644f732dacb6c8d0979ba3Adam Powell if (mAdapter != null && mDataSetObserver != null) { 26822c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen mDataSetObserver.onChanged(); 26922c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen } 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the top of the list. If addHeaderView is 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * NOTE: Call this before calling setAdapter. This is so ListView can wrap 278176f9fc215194411cf0461a178d77fa57486112bGilles Debunne * the supplied cursor with one that will also account for header and footer 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views. 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addHeaderView(View v) { 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addHeaderView(v, null, true); 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getHeaderViewsCount() { 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mHeaderViewInfos.size(); 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes a previously-added header view. 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to remove 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the view was removed, false if the view was not a header 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * view 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean removeHeaderView(View v) { 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mHeaderViewInfos.size() > 0) { 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean result = false; 302247a0f0a16f956c463644f732dacb6c8d0979ba3Adam Powell if (mAdapter != null && ((HeaderViewListAdapter) mAdapter).removeHeader(v)) { 30322c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen if (mDataSetObserver != null) { 30422c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen mDataSetObserver.onChanged(); 30522c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen } 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result = true; 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeFixedViewInfo(v, mHeaderViewInfos); 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void removeFixedViewInfo(View v, ArrayList<FixedViewInfo> where) { 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; ++i) { 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FixedViewInfo info = where.get(i); 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (info.view == v) { 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project where.remove(i); 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the bottom of the list. If addFooterView is 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * NOTE: Call this before calling setAdapter. This is so ListView can wrap 331176f9fc215194411cf0461a178d77fa57486112bGilles Debunne * the supplied cursor with one that will also account for header and footer 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views. 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param data Data to associate with this view 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isSelectable true if the footer view can be selected 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addFooterView(View v, Object data, boolean isSelectable) { 33922c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen 34063f9689627b8fd9b94afd35b1274939c56e5642fMarco Nelissen // NOTE: do not enforce the adapter being null here, since unlike in 34163f9689627b8fd9b94afd35b1274939c56e5642fMarco Nelissen // addHeaderView, it was never enforced here, and so existing apps are 34263f9689627b8fd9b94afd35b1274939c56e5642fMarco Nelissen // relying on being able to add a footer and then calling setAdapter to 34363f9689627b8fd9b94afd35b1274939c56e5642fMarco Nelissen // force creation of the HeaderViewListAdapter wrapper 34422c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FixedViewInfo info = new FixedViewInfo(); 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.view = v; 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.data = data; 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.isSelectable = isSelectable; 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterViewInfos.add(info); 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // in the case of re-adding a footer view, or adding one later on, 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we need to notify the observer 353247a0f0a16f956c463644f732dacb6c8d0979ba3Adam Powell if (mAdapter != null && mDataSetObserver != null) { 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataSetObserver.onChanged(); 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the bottom of the list. If addFooterView is called more 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * than once, the views will appear in the order they were added. Views added using 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this call can take focus if they want. 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>NOTE: Call this before calling setAdapter. This is so ListView can wrap the supplied 363176f9fc215194411cf0461a178d77fa57486112bGilles Debunne * cursor with one that will also account for header and footer views. 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addFooterView(View v) { 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addFooterView(v, null, true); 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getFooterViewsCount() { 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFooterViewInfos.size(); 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes a previously-added footer view. 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to remove 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * true if the view was removed, false if the view was not a footer view 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean removeFooterView(View v) { 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFooterViewInfos.size() > 0) { 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean result = false; 387247a0f0a16f956c463644f732dacb6c8d0979ba3Adam Powell if (mAdapter != null && ((HeaderViewListAdapter) mAdapter).removeFooter(v)) { 38822c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen if (mDataSetObserver != null) { 38922c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen mDataSetObserver.onChanged(); 39022c04a316a482176957fd27285c0fe36e2f3979cMarco Nelissen } 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result = true; 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeFixedViewInfo(v, mFooterViewInfos); 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the adapter currently in use in this ListView. The returned adapter 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * might not be the same adapter passed to {@link #setAdapter(ListAdapter)} but 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * might be a {@link WrapperListAdapter}. 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The adapter currently used to display data in this ListView. 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setAdapter(ListAdapter) 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListAdapter getAdapter() { 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mAdapter; 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 414499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * Sets up this AbsListView to use a remote views adapter which connects to a RemoteViewsService 415499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * through the specified intent. 416499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * @param intent the intent used to identify the RemoteViewsService for the adapter to connect to. 417499cb9f516062b654952d282f211bee44c31a3c2Winson Chung */ 418499cb9f516062b654952d282f211bee44c31a3c2Winson Chung @android.view.RemotableViewMethod 419499cb9f516062b654952d282f211bee44c31a3c2Winson Chung public void setRemoteViewsAdapter(Intent intent) { 420499cb9f516062b654952d282f211bee44c31a3c2Winson Chung super.setRemoteViewsAdapter(intent); 421499cb9f516062b654952d282f211bee44c31a3c2Winson Chung } 422499cb9f516062b654952d282f211bee44c31a3c2Winson Chung 423499cb9f516062b654952d282f211bee44c31a3c2Winson Chung /** 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the data behind this ListView. 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The adapter passed to this method may be wrapped by a {@link WrapperListAdapter}, 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * depending on the ListView features currently in use. For instance, adding 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * headers and/or footers will cause the adapter to be wrapped. 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param adapter The ListAdapter which is responsible for maintaining the 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * data backing this list and for producing a view to represent an 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * item in that data set. 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #getAdapter() 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setAdapter(ListAdapter adapter) { 438df36b0579e1e550de3d66a20362717e49b23235cRomain Guy if (mAdapter != null && mDataSetObserver != null) { 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter.unregisterDataSetObserver(mDataSetObserver); 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.clear(); 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mHeaderViewInfos.size() > 0|| mFooterViewInfos.size() > 0) { 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter = new HeaderViewListAdapter(mHeaderViewInfos, mFooterViewInfos, adapter); 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter = adapter; 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldSelectedPosition = INVALID_POSITION; 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldSelectedRowId = INVALID_ROW_ID; 453f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell 454f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell // AbsListView#setAdapter will update choice mode states. 455f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell super.setAdapter(adapter); 456f343e1ba7e796120eefa917dbf78348feea98e11Adam Powell 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter != null) { 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAreAllItemsSelectable = mAdapter.areAllItemsEnabled(); 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldItemCount = mItemCount; 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemCount = mAdapter.getCount(); 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkFocus(); 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataSetObserver = new AdapterDataSetObserver(); 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter.registerDataSetObserver(mDataSetObserver); 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.setViewTypeCount(mAdapter.getViewTypeCount()); 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position; 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mStackFromBottom) { 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(mItemCount - 1, false); 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(0, true); 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing selected 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAreAllItemsSelectable = true; 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkFocus(); 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing selected 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The list is empty. Clear everything out. 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void resetList() { 4972e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy // The parent's resetList() will remove all views from the layout so we need to 4982e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy // cleanup the state of our footers and headers 4992e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy clearRecycledState(mHeaderViewInfos); 5002e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy clearRecycledState(mFooterViewInfos); 5012e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.resetList(); 5032e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_NORMAL; 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5072e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy private void clearRecycledState(ArrayList<FixedViewInfo> infos) { 5082e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy if (infos != null) { 5092e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy final int count = infos.size(); 5102e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5112e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy for (int i = 0; i < count; i++) { 5122e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy final View child = infos.get(i).view; 5132e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy final LayoutParams p = (LayoutParams) child.getLayoutParams(); 5142e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy if (p != null) { 5152e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy p.recycledHeaderFooter = false; 5162e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5172e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5182e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5192e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy } 5202e447d46d9936c325fe5209262564fc3c5e795a2Romain Guy 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the list needs to show the top fading edge 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean showingTopFadingEdge() { 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mScrollY + mListPadding.top; 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mFirstPosition > 0) || (getChildAt(0).getTop() > listTop); 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the list needs to show the bottom fading edge 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean showingBottomFadingEdge() { 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomOfBottomChild = getChildAt(childCount - 1).getBottom(); 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePosition = mFirstPosition + childCount - 1; 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = mScrollY + getHeight() - mListPadding.bottom; 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (lastVisiblePosition < mItemCount - 1) 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || (bottomOfBottomChild < listBottom); 5419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) { 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int rectTopWithinChild = rect.top; 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset so rect is in coordinates of the this view 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rect.offset(child.getLeft(), child.getTop()); 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rect.offset(-child.getScrollX(), -child.getScrollY()); 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int height = getHeight(); 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listUnfadedTop = getScrollY(); 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listUnfadedBottom = listUnfadedTop + height; 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int fadingEdge = getVerticalFadingEdgeLength(); 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (showingTopFadingEdge()) { 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for top fading edge as long as rect isn't at very top 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mSelectedPosition > 0) || (rectTopWithinChild > fadingEdge)) { 5619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listUnfadedTop += fadingEdge; 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomOfBottomChild = getChildAt(childCount - 1).getBottom(); 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (showingBottomFadingEdge()) { 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for bottom fading edge as long as rect isn't at very bottom 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mSelectedPosition < mItemCount - 1) 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || (rect.bottom < (bottomOfBottomChild - fadingEdge))) { 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listUnfadedBottom -= fadingEdge; 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollYDelta = 0; 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.bottom > listUnfadedBottom && rect.top > listUnfadedTop) { 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to MOVE DOWN to get it in view: move down just enough so 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 5829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 5859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.top - listUnfadedTop); 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at bottom of screen 5889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.bottom - listUnfadedBottom); 5899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our children 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToBottom = bottomOfBottomChild - listUnfadedBottom; 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.min(scrollYDelta, distanceToBottom); 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.top < listUnfadedTop && rect.bottom < listUnfadedBottom) { 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to MOVE UP to get it in view: move up just enough so that 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (listUnfadedBottom - rect.bottom); 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at top 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (listUnfadedTop - rect.top); 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the top our children 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int top = getChildAt(0).getTop(); 6099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int deltaToTop = top - listUnfadedTop; 6109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.max(scrollYDelta, deltaToTop); 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = scrollYDelta != 0; 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollListItemsBy(-scrollYDelta); 616079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(INVALID_POSITION, child); 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = child.getTop(); 6189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 6199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 6219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void fillGap(boolean down) { 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = getChildCount(); 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down) { 6308c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int paddingTop = 0; 6318c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 6328c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell paddingTop = getListPaddingTop(); 6338c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int startOffset = count > 0 ? getChildAt(count - 1).getBottom() + mDividerHeight : 6358c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell paddingTop; 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mFirstPosition + count, startOffset); 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6398c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int paddingBottom = 0; 6408c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 6418c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell paddingBottom = getListPaddingBottom(); 6428c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int startOffset = count > 0 ? getChildAt(0).getTop() - mDividerHeight : 6448c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell getHeight() - paddingBottom; 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mFirstPosition - 1, startOffset); 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from pos down to the end of the list view. 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pos The first position to put in the list 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextTop The location where the top of the item associated with pos 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should be drawn 6579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected, if it happens to be in the 6599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * range that we draw. 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillDown(int pos, int nextTop) { 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = null; 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6648c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int end = (mBottom - mTop); 6658c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 6668c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell end -= mListPadding.bottom; 6678c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (nextTop < end && pos < mItemCount) { 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is this the selected item? 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected = pos == mSelectedPosition; 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = makeAndAddView(pos, nextTop, true, mListPadding.left, selected); 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextTop = child.getBottom() + mDividerHeight; 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selected) { 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = child; 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pos++; 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedView; 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from pos up to the top of the list view. 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pos The first position to put in the list 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextBottom The location where the bottom of the item associated 6909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * with pos should be drawn 6919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected 6939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillUp(int pos, int nextBottom) { 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = null; 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6978c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell int end = 0; 6988c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 6998c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell end = mListPadding.top; 7008c3e0fc84f69e9fe704dc20dd6c2bab1ce43fe93Adam Powell } 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (nextBottom > end && pos >= 0) { 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is this the selected item? 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected = pos == mSelectedPosition; 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = makeAndAddView(pos, nextBottom, false, mListPadding.left, selected); 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextBottom = child.getTop() - mDividerHeight; 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selected) { 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = child; 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pos--; 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = pos + 1; 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedView; 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from top to bottom, starting with mFirstPosition 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextTop The location where the top of the first item should be 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drawn 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromTop(int nextTop) { 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = Math.min(mFirstPosition, mSelectedPosition); 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = Math.min(mFirstPosition, mItemCount - 1); 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition < 0) { 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = 0; 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return fillDown(mFirstPosition, nextTop); 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Put mSelectedPosition in the middle of the screen and then build up and 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down from there. This method forces mSelectedPosition to the center. 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Top of the area in which children can be drawn, as 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * measured in pixels 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Bottom of the area in which children can be drawn, 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * as measured in pixels 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Currently selected view 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromMiddle(int childrenTop, int childrenBottom) { 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = childrenBottom - childrenTop; 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = reconcileSelectedPosition(); 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel = makeAndAddView(position, childrenTop, true, 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, true); 7539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = position; 7549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selHeight = sel.getMeasuredHeight(); 7569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selHeight <= height) { 7579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom((height - selHeight) / 2); 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, position); 7619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 7639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 7649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 7669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 7699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Once the selected view as been placed, fill up the visible area above and 7739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * below it. 7749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param sel The selected view 7769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The position corresponding to sel 7779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void fillAboveAndBelow(View sel, int position) { 7799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 7809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 7819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(position - 1, sel.getTop() - dividerHeight); 7829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(position + 1, sel.getBottom() + dividerHeight); 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(position + 1, sel.getBottom() + dividerHeight); 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 7879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(position - 1, sel.getTop() - dividerHeight); 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the grid based on positioning the new selection at a specific 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * location. The selection may be moved so that it does not intersect the 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * faded edges. The grid is then filled upwards and downwards from there. 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedTop Where the selected item should be 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Where to start drawing children 7999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Last pixel where children can be drawn 8009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that currently has selection 8019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromSelection(int selectedTop, int childrenTop, int childrenBottom) { 8039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdgeLength = getVerticalFadingEdgeLength(); 8049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedPosition = mSelectedPosition; 8059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int topSelectionPixel = getTopSelectionPixel(childrenTop, fadingEdgeLength, 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomSelectionPixel = getBottomSelectionPixel(childrenBottom, fadingEdgeLength, 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, selectedTop, true, mListPadding.left, true); 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends below the bottom of the list 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getBottom() > bottomSelectionPixel) { 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available above the selection into which we can scroll 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // upwards 8209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceAbove = sel.getTop() - topSelectionPixel; 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the bottom of the selected item 8239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // fully into view 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceBelow = sel.getBottom() - bottomSelectionPixel; 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int offset = Math.min(spaceAbove, spaceBelow); 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now offset the selected item to get it into view 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(-offset); 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (sel.getTop() < topSelectionPixel) { 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the top of the selected item fully 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // into view 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceAbove = topSelectionPixel - sel.getTop(); 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available below the selection into which we can scroll 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // downwards 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceBelow = bottomSelectionPixel - sel.getBottom(); 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int offset = Math.min(spaceAbove, spaceBelow); 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Offset the selected item to get it into view 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(offset); 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calculate the bottom-most pixel we can draw the selection into 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Bottom pixel were children can be drawn 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fadingEdgeLength Length of the fading edge in pixels, if present 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedPosition The position that will be selected 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The bottom-most pixel we can draw the selection into 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getBottomSelectionPixel(int childrenBottom, int fadingEdgeLength, 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedPosition) { 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomSelectionPixel = childrenBottom; 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedPosition != mItemCount - 1) { 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomSelectionPixel -= fadingEdgeLength; 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bottomSelectionPixel; 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calculate the top-most pixel we can draw the selection into 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Top pixel were children can be drawn 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fadingEdgeLength Length of the fading edge in pixels, if present 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedPosition The position that will be selected 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The top-most pixel we can draw the selection into 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getTopSelectionPixel(int childrenTop, int fadingEdgeLength, int selectedPosition) { 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first pixel we can draw the selection into 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topSelectionPixel = childrenTop; 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedPosition > 0) { 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topSelectionPixel += fadingEdgeLength; 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return topSelectionPixel; 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 889499cb9f516062b654952d282f211bee44c31a3c2Winson Chung /** 890499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * Smoothly scroll to the specified adapter position. The view will 891499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * scroll such that the indicated position is displayed. 892499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * @param position Scroll to this adapter position. 893499cb9f516062b654952d282f211bee44c31a3c2Winson Chung */ 894499cb9f516062b654952d282f211bee44c31a3c2Winson Chung @android.view.RemotableViewMethod 895499cb9f516062b654952d282f211bee44c31a3c2Winson Chung public void smoothScrollToPosition(int position) { 896499cb9f516062b654952d282f211bee44c31a3c2Winson Chung super.smoothScrollToPosition(position); 897499cb9f516062b654952d282f211bee44c31a3c2Winson Chung } 898499cb9f516062b654952d282f211bee44c31a3c2Winson Chung 899499cb9f516062b654952d282f211bee44c31a3c2Winson Chung /** 900499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * Smoothly scroll to the specified adapter position offset. The view will 901499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * scroll such that the indicated position is displayed. 902499cb9f516062b654952d282f211bee44c31a3c2Winson Chung * @param offset The amount to offset from the adapter position to scroll to. 903499cb9f516062b654952d282f211bee44c31a3c2Winson Chung */ 904499cb9f516062b654952d282f211bee44c31a3c2Winson Chung @android.view.RemotableViewMethod 905499cb9f516062b654952d282f211bee44c31a3c2Winson Chung public void smoothScrollByOffset(int offset) { 906499cb9f516062b654952d282f211bee44c31a3c2Winson Chung super.smoothScrollByOffset(offset); 907499cb9f516062b654952d282f211bee44c31a3c2Winson Chung } 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list based on positioning the new selection relative to the old 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selection. The new selection will be placed at, above, or below the 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * location of the new selection depending on how the selection is moving. 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The selection will then be pinned to the visible part of the screen, 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * excluding the edges that are faded. The list is then filled upwards and 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * downwards from there. 9169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param oldSel The old selected view. Useful for trying to put the new 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selection in the same place 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newSel The view that is to become selected. Useful for trying to 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * put the new selection in the same place 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta Which way we are moving 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Where to start drawing children 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Last pixel where children can be drawn 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that currently has selection 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View moveSelection(View oldSel, View newSel, int delta, int childrenTop, 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenBottom) { 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdgeLength = getVerticalFadingEdgeLength(); 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedPosition = mSelectedPosition; 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int topSelectionPixel = getTopSelectionPixel(childrenTop, fadingEdgeLength, 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomSelectionPixel = getBottomSelectionPixel(childrenTop, fadingEdgeLength, 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 1: Scrolling down. 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Before After 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | A | | A | 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | 1 | => +-------+ 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ | B | 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | B | | 2 | 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Try to keep the top of the previously selected item where it was. 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * oldSel = A 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * sel = B 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Put oldSel (A) where it belongs 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel = makeAndAddView(selectedPosition - 1, oldSel.getTop(), true, 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, false); 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now put the new selection (B) below that 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldSel.getBottom() + dividerHeight, true, 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, true); 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends below the bottom of the list 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getBottom() > bottomSelectionPixel) { 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available above the selection into which we can scroll upwards 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceAbove = sel.getTop() - topSelectionPixel; 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the bottom of the selected item fully into view 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceBelow = sel.getBottom() - bottomSelectionPixel; 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't scroll more than half the height of the list 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int halfVerticalSpace = (childrenBottom - childrenTop) / 2; 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset = Math.min(spaceAbove, spaceBelow); 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset = Math.min(offset, halfVerticalSpace); 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We placed oldSel, so offset that item 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel.offsetTopAndBottom(-offset); 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now offset the selected item to get it into view 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(-offset); 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mSelectedPosition - 2, sel.getTop() - dividerHeight); 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mSelectedPosition + 1, sel.getBottom() + dividerHeight); 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mSelectedPosition + 1, sel.getBottom() + dividerHeight); 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mSelectedPosition - 2, sel.getTop() - dividerHeight); 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (delta < 0) { 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 2: Scrolling up. 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Before After 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | A | | A | 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ => | 1 | 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | B | +-------+ 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | 2 | | B | 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Try to keep the top of the item about to become selected where it was. 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * newSel = A 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * olSel = B 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSel != null) { 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Try to position the top of newSel (A) where it was before it was selected 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, newSel.getTop(), true, mListPadding.left, 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project true); 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If (A) was not on screen and so did not have a view, position 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it above the oldSel (B) 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldSel.getTop(), false, mListPadding.left, 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project true); 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends above the top of the list 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getTop() < topSelectionPixel) { 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the top of the selected item fully into view 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceAbove = topSelectionPixel - sel.getTop(); 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available below the selection into which we can scroll downwards 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceBelow = bottomSelectionPixel - sel.getBottom(); 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't scroll more than half the height of the list 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int halfVerticalSpace = (childrenBottom - childrenTop) / 2; 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset = Math.min(spaceAbove, spaceBelow); 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset = Math.min(offset, halfVerticalSpace); 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Offset the selected item to get it into view 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(offset); 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldTop = oldSel.getTop(); 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 3: Staying still 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldTop, true, mListPadding.left, true); 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We're staying still... 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (oldTop < childrenTop) { 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... but the top of the old selection was off screen. 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (This can happen if the data changes size out from under us) 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newBottom = sel.getBottom(); 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newBottom < childrenTop + 20) { 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Not enough visible -- bring it onscreen 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(childrenTop - sel.getTop()); 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10779bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private class FocusSelector implements Runnable { 10789bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private int mPosition; 10799bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell private int mPositionTop; 10809bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 10819bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell public FocusSelector setup(int position, int top) { 10829bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell mPosition = position; 10839bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell mPositionTop = top; 10849bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell return this; 10859bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 10869bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 10879bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell public void run() { 10889bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell setSelectionFromTop(mPosition, mPositionTop); 10899bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 10909bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 10919bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 10929bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell @Override 10939bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell protected void onSizeChanged(int w, int h, int oldw, int oldh) { 10949bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell if (getChildCount() > 0) { 10959bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell View focusedChild = getFocusedChild(); 10969bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell if (focusedChild != null) { 10979bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int childPosition = mFirstPosition + indexOfChild(focusedChild); 10989bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int childBottom = focusedChild.getBottom(); 10999bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int offset = Math.max(0, childBottom - (h - mPaddingTop)); 11009bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell final int top = focusedChild.getTop() - offset; 11019bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell if (mFocusSelector == null) { 11029bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell mFocusSelector = new FocusSelector(); 11039bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11049bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell post(mFocusSelector.setup(childPosition, top)); 11059bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11069bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11079bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell super.onSizeChanged(w, h, oldw, oldh); 11089bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell } 11099bf3c128509de5bd66222943a00acfcd1000cd62Adam Powell 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 11129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Sets up mListPadding 11139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 11149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int widthMode = MeasureSpec.getMode(widthMeasureSpec); 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int heightMode = MeasureSpec.getMode(heightMeasureSpec); 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int widthSize = MeasureSpec.getSize(widthMeasureSpec); 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int heightSize = MeasureSpec.getSize(heightMeasureSpec); 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidth = 0; 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeight = 0; 1122189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn int childState = 0; 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemCount = mAdapter == null ? 0 : mAdapter.getCount(); 11259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && (widthMode == MeasureSpec.UNSPECIFIED || 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightMode == MeasureSpec.UNSPECIFIED)) { 112721875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy final View child = obtainView(0, mIsScrap); 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureScrapChild(child, 0, widthMeasureSpec); 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childWidth = child.getMeasuredWidth(); 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeight = child.getMeasuredHeight(); 1133189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn childState = combineMeasuredStates(childState, child.getMeasuredState()); 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11359c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy if (recycleOnMeasure() && mRecycler.shouldRecycleViewType( 11369c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy ((LayoutParams) child.getLayoutParams()).viewType)) { 1137079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn mRecycler.addScrapView(child, -1); 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (widthMode == MeasureSpec.UNSPECIFIED) { 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project widthSize = mListPadding.left + mListPadding.right + childWidth + 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getVerticalScrollbarWidth(); 1144189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn } else { 1145189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn widthSize |= (childState&MEASURED_STATE_MASK); 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.UNSPECIFIED) { 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightSize = mListPadding.top + mListPadding.bottom + childHeight + 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getVerticalFadingEdgeLength() * 2; 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.AT_MOST) { 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // TODO: after first layout we should maybe start at the first visible position, not 0 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightSize = measureHeightOfChildren(widthMeasureSpec, 0, NO_POSITION, heightSize, -1); 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1158189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn setMeasuredDimension(widthSize , heightSize); 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mWidthMeasureSpec = widthMeasureSpec; 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureScrapChild(View child, int position, int widthMeasureSpec) { 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LayoutParams p = (LayoutParams) child.getLayoutParams(); 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 1165980a938c1c9a6a5791a8240e5a1e6638ab28dc77Romain Guy p = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT, 0); 11674df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project child.setLayoutParams(p); 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p.viewType = mAdapter.getItemViewType(position); 11700bf88594c43ced48d862d122e3e84967b3b63658Romain Guy p.forceAdd = true; 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(widthMeasureSpec, 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True to recycle the views used to measure this ListView in 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * UNSPECIFIED/AT_MOST modes, false otherwise. 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1189bea95162ca25bd00b0479d93739b6283795c3986Konstantin Lopyrev @ViewDebug.ExportedProperty(category = "list") 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean recycleOnMeasure() { 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Measures the height of the given range of children (inclusive) and 11969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returns the height with this ListView's padding and divider heights 11979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * included. If maxHeight is provided, the measuring will stop when the 11989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * current height reaches maxHeight. 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param widthMeasureSpec The width measure spec to be given to a child's 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link View#measure(int, int)}. 12029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param startPosition The position of the first child to be shown. 12039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param endPosition The (inclusive) position of the last child to be 12049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * shown. Specify {@link #NO_POSITION} if the last child should be 12059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the last available child from the adapter. 12069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param maxHeight The maximum height that will be returned (if all the 12079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children don't fit in this value, this value will be 12089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returned). 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param disallowPartialChildPosition In general, whether the returned 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * height should only contain entire children. This is more 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * powerful--it is the first inclusive position at which partial 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children will not be allowed. Example: it looks nice to have 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least 3 completely visible children, and in portrait this 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will most likely fit; but in landscape there could be times 12159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * when even 2 children can not be completely shown, so a value 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of 2 (remember, inclusive) would be good (assuming 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * startPosition is 0). 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The height of this ListView with the given children. 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int measureHeightOfChildren(int widthMeasureSpec, int startPosition, int endPosition, 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxHeight, int disallowPartialChildPosition) { 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = mAdapter; 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter == null) { 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mListPadding.top + mListPadding.bottom; 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Include the padding of the list 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int returnedHeight = mListPadding.top + mListPadding.bottom; 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = ((mDividerHeight > 0) && mDivider != null) ? mDividerHeight : 0; 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The previous height value that was less than maxHeight and contained 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no partial children 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int prevHeightWithoutPartialChild = 0; 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int i; 12359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 12369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // mItemCount - 1 since endPosition parameter is inclusive 12389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endPosition = (endPosition == NO_POSITION) ? adapter.getCount() - 1 : endPosition; 12399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final AbsListView.RecycleBin recycleBin = mRecycler; 12409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean recyle = recycleOnMeasure(); 124121875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy final boolean[] isScrap = mIsScrap; 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (i = startPosition; i <= endPosition; ++i) { 124421875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy child = obtainView(i, isScrap); 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureScrapChild(child, i, widthMeasureSpec); 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i > 0) { 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Count the divider for all but one child 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project returnedHeight += dividerHeight; 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Recycle the view before we possibly return from the method 12549c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy if (recyle && recycleBin.shouldRecycleViewType( 12559c3184cc162ee8c10eabd3f996629a9397a1f551Romain Guy ((LayoutParams) child.getLayoutParams()).viewType)) { 1256079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(child, -1); 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project returnedHeight += child.getMeasuredHeight(); 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (returnedHeight >= maxHeight) { 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We went over, figure out which height to return. If returnedHeight > maxHeight, 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // then the i'th position did not fit completely. 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (disallowPartialChildPosition >= 0) // Disallowing is enabled (> -1) 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (i > disallowPartialChildPosition) // We've past the min pos 12669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (prevHeightWithoutPartialChild > 0) // We have a prev height 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (returnedHeight != maxHeight) // i'th child did not fit completely 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ? prevHeightWithoutPartialChild 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : maxHeight; 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((disallowPartialChildPosition >= 0) && (i >= disallowPartialChildPosition)) { 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevHeightWithoutPartialChild = returnedHeight; 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // At this point, we went through the range of children, and they each 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // completely fit, so return the returnedHeight 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return returnedHeight; 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int findMotionRow(int y) { 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 128684222e04252720cf681032e865db526ce4a612a4Adam Powell if (!mStackFromBottom) { 128784222e04252720cf681032e865db526ce4a612a4Adam Powell for (int i = 0; i < childCount; i++) { 128884222e04252720cf681032e865db526ce4a612a4Adam Powell View v = getChildAt(i); 128984222e04252720cf681032e865db526ce4a612a4Adam Powell if (y <= v.getBottom()) { 129084222e04252720cf681032e865db526ce4a612a4Adam Powell return mFirstPosition + i; 129184222e04252720cf681032e865db526ce4a612a4Adam Powell } 129284222e04252720cf681032e865db526ce4a612a4Adam Powell } 129384222e04252720cf681032e865db526ce4a612a4Adam Powell } else { 129484222e04252720cf681032e865db526ce4a612a4Adam Powell for (int i = childCount - 1; i >= 0; i--) { 129584222e04252720cf681032e865db526ce4a612a4Adam Powell View v = getChildAt(i); 129684222e04252720cf681032e865db526ce4a612a4Adam Powell if (y >= v.getTop()) { 129784222e04252720cf681032e865db526ce4a612a4Adam Powell return mFirstPosition + i; 129884222e04252720cf681032e865db526ce4a612a4Adam Powell } 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Put a specific item at a specific location on the screen and then build 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * up and down from there. 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The reference view to use as the starting point 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param top Pixel offset from the top of this view to the top of the 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * reference view. 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The selected view, or null if the selected view is outside the 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible area. 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillSpecific(int position, int top) { 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean tempIsSelected = position == mSelectedPosition; 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View temp = makeAndAddView(position, top, true, mListPadding.left, tempIsSelected); 13199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Possibly changed again in fillUp if we add rows above this one. 13209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = position; 13219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View above; 13239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View below; 13249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 13269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project above = fillUp(position - 1, temp.getTop() - dividerHeight); 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will correct for the top of the first view not touching the top of the list 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project below = fillDown(position + 1, temp.getBottom() + dividerHeight); 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(childCount); 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project below = fillDown(position + 1, temp.getBottom() + dividerHeight); 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will correct for the bottom of the last view not touching the bottom of the list 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project above = fillUp(position - 1, temp.getTop() - dividerHeight); 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(childCount); 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (tempIsSelected) { 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return temp; 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (above != null) { 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return above; 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return below; 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Check if we have dragged the bottom of the list too high (we have pushed the 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top element off the top of the screen when we did not need to). Correct by sliding 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * everything back down. 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childCount Number of children 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void correctTooHigh(int childCount) { 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // First see if the last item is visible. If it is not, it is OK for the 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top of the list to be pushed up. 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastPosition = mFirstPosition + childCount - 1; 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastPosition == mItemCount - 1 && childCount > 0) { 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the last child ... 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View lastChild = getChildAt(childCount - 1); 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and its bottom edge 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastBottom = lastChild.getBottom(); 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is bottom of our drawable area 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int end = (mBottom - mTop) - mListPadding.bottom; 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is how far the bottom edge of the last view is from the bottom of the 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // drawable area 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomOffset = end - lastBottom; 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View firstChild = getChildAt(0); 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstTop = firstChild.getTop(); 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure we are 1) Too high, and 2) Either there are more rows above the 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first row or the first row is scrolled off the top of the drawable area 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bottomOffset > 0 && (mFirstPosition > 0 || firstTop < mListPadding.top)) { 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0) { 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't pull the top too far down 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomOffset = Math.min(bottomOffset, mListPadding.top - firstTop); 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Move everything down 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(bottomOffset); 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition > 0) { 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill the gap that was opened above mFirstPosition with more rows, if 13949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // possible 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mFirstPosition - 1, firstChild.getTop() - mDividerHeight); 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Close up the remaining gap 13979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 13989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Check if we have dragged the bottom of the list too low (we have pushed the 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bottom element off the bottom of the screen when we did not need to). Correct by sliding 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * everything back up. 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childCount Number of children 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void correctTooLow(int childCount) { 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // First see if the first item is visible. If it is not, it is OK for the 14139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // bottom of the list to be pushed down. 14149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0 && childCount > 0) { 14159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the first child ... 14179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View firstChild = getChildAt(0); 14189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and its top edge 14209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstTop = firstChild.getTop(); 14219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is top of our drawable area 14239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int start = mListPadding.top; 14249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is bottom of our drawable area 14269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int end = (mBottom - mTop) - mListPadding.bottom; 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is how far the top edge of the first view is from the top of the 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // drawable area 14309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topOffset = firstTop - start; 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View lastChild = getChildAt(childCount - 1); 14329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastBottom = lastChild.getBottom(); 14339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastPosition = mFirstPosition + childCount - 1; 14349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure we are 1) Too low, and 2) Either there are more rows below the 14369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // last row or the last row is scrolled off the bottom of the drawable area 14376198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (topOffset > 0) { 14386198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (lastPosition < mItemCount - 1 || lastBottom > end) { 14396198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (lastPosition == mItemCount - 1) { 14406198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Don't pull the bottom too far up 14416198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy topOffset = Math.min(topOffset, lastBottom - end); 14426198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy } 14436198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Move everything up 14446198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy offsetChildrenTopAndBottom(-topOffset); 14456198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy if (lastPosition < mItemCount - 1) { 14466198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Fill the gap that was opened below the last position with more rows, if 14476198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // possible 14486198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy fillDown(lastPosition + 1, lastChild.getBottom() + mDividerHeight); 14496198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy // Close up the remaining gap 14506198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy adjustViewsUpOrDown(); 14516198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy } 14526198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy } else if (lastPosition == mItemCount - 1) { 14536198ae8468668bf7374535c2eeeab8de7f8e7e99Romain Guy adjustViewsUpOrDown(); 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void layoutChildren() { 14619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean blockLayoutRequests = mBlockLayoutRequests; 14629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!blockLayoutRequests) { 14639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBlockLayoutRequests = true; 14644df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project } else { 14654df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project return; 14669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 14699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.layoutChildren(); 14709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 14729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter == null) { 14749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 14759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 14769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 14779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenTop = mListPadding.top; 14809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenBottom = mBottom - mTop - mListPadding.bottom; 14819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 1483ead0d4d8282b35a10bf8816cd99a62a8499d9031Romain Guy int index = 0; 14849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = 0; 14859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 14879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldSel = null; 14889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldFirst = null; 14899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newSel = null; 14909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusLayoutRestoreView = null; 14929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember stuff we will need down below 14949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mLayoutMode) { 14959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SET_SELECTION: 14969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = mNextSelectedPosition - mFirstPosition; 14979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0 && index < childCount) { 14989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSel = getChildAt(index); 14999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 15019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_TOP: 15029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_BOTTOM: 15039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SPECIFIC: 15049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SYNC: 15059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 15069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_MOVE_SELECTION: 15079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: 15089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember the previously selected view 15099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = mSelectedPosition - mFirstPosition; 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0 && index < childCount) { 15119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel = getChildAt(index); 15129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember the previous first child 15159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldFirst = getChildAt(0); 15169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNextSelectedPosition >= 0) { 15189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = mNextSelectedPosition - mSelectedPosition; 15199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Caution: newSel might be null 15229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSel = getChildAt(index + delta); 15239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean dataChanged = mDataChanged; 15279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dataChanged) { 15289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleDataChanged(); 15299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Handle the empty set by removing all views that are visible 15329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // and calling it a day 15339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 15349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 15359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 15369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 1537b45f124a041adf81b3ac8b8dec6b396e751e92d7Romain Guy } else if (mItemCount != mAdapter.getCount()) { 1538b45f124a041adf81b3ac8b8dec6b396e751e92d7Romain Guy throw new IllegalStateException("The content of the adapter has changed but " 1539b45f124a041adf81b3ac8b8dec6b396e751e92d7Romain Guy + "ListView did not receive a notification. Make sure the content of " 1540b45f124a041adf81b3ac8b8dec6b396e751e92d7Romain Guy + "your adapter is not modified from a background thread, but only " 15413940f2df36fbe6a712c88655fc78244977ebd0abOwen Lin + "from the UI thread. [in ListView(" + getId() + ", " + getClass() 15423940f2df36fbe6a712c88655fc78244977ebd0abOwen Lin + ") with Adapter(" + mAdapter.getClass() + ")]"); 15439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(mNextSelectedPosition); 15469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pull all children into the RecycleBin. 15489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // These views will be reused if possible 15499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstPosition = mFirstPosition; 15509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final RecycleBin recycleBin = mRecycler; 15519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // reset the focus restoration 15539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusLayoutRestoreDirectChild = null; 15549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't put header or footer views into the Recycler. Those are 15569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // already cached in mHeaderViews; 15579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dataChanged) { 15589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < childCount; i++) { 1559079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(getChildAt(i), firstPosition+i); 15609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ViewDebug.TRACE_RECYCLER) { 15619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewDebug.trace(getChildAt(i), 15629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP, index, i); 15639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 15669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.fillActiveViews(childCount, firstPosition); 15679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // take focus back to us temporarily to avoid the eventual 15709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // call to clear focus when removing the focused child below 1571c6cc0f8c19d9eccf408a443fa2bf668af261dcd0Joe Onorato // from messing things up when ViewAncestor assigns focus back 15729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // to someone else 15739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focusedChild = getFocusedChild(); 15749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusedChild != null) { 15759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // TODO: in some cases focusedChild.getParent() == null 15769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we can remember the focused view to restore after relayout if the 15789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // data hasn't changed, or if the focused position is a header or footer 15799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { 15804df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project focusLayoutRestoreDirectChild = focusedChild; 15814df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project // remember the specific view that had focus 15824df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project focusLayoutRestoreView = findFocus(); 15834df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project if (focusLayoutRestoreView != null) { 15844df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project // tell it we are going to mess with it 15854df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project focusLayoutRestoreView.onStartTemporaryDetach(); 15869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestFocus(); 15899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear out old views 15929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachAllViewsFromParent(); 15939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mLayoutMode) { 15959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SET_SELECTION: 15969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSel != null) { 15979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromSelection(newSel.getTop(), childrenTop, childrenBottom); 15989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 15999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromMiddle(childrenTop, childrenBottom); 16009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SYNC: 16039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mSyncPosition, mSpecificTop); 16049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_BOTTOM: 16069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillUp(mItemCount - 1, childrenBottom); 16079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 16089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_TOP: 16109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = 0; 16119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromTop(childrenTop); 16129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 16139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SPECIFIC: 16159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(reconcileSelectedPosition(), mSpecificTop); 16169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_MOVE_SELECTION: 16189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = moveSelection(oldSel, newSel, delta, childrenTop, childrenBottom); 16199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: 16219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount == 0) { 16229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 16239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int position = lookForSelectablePosition(0, true); 16249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 16259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromTop(childrenTop); 16269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int position = lookForSelectablePosition(mItemCount - 1, false); 16289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 16299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillUp(mItemCount - 1, childrenBottom); 16309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { 16339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mSelectedPosition, 16349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel == null ? childrenTop : oldSel.getTop()); 16359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (mFirstPosition < mItemCount) { 16369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mFirstPosition, 16379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldFirst == null ? childrenTop : oldFirst.getTop()); 16389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(0, childrenTop); 16409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 16439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Flush any cached views that did not get reused above 16469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.scrapActiveViews(); 16479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel != null) { 16493616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy // the current selected item should get focus if items 16503616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy // are focusable 16513616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { 16523616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && 16533616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); 16543616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (!focusWasTaken) { 16553616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy // selected item didn't take focus, fine, but still want 16563616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy // to make sure something else outside of the selected view 16573616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy // has focus 16583616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final View focused = getFocusedChild(); 16593616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (focused != null) { 16603616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy focused.clearFocus(); 16613616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 1662079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(INVALID_POSITION, sel); 16633616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } else { 16643616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy sel.setSelected(false); 16653616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mSelectorRect.setEmpty(); 16663616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 16673616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } else { 1668079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(INVALID_POSITION, sel); 16693616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 16703616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mSelectedTop = sel.getTop(); 16719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16723616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { 16733616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy View child = getChildAt(mMotionPosition - mFirstPosition); 1674079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn if (child != null) positionSelector(mMotionPosition, child); 16753616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } else { 16763616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mSelectedTop = 0; 16773616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mSelectorRect.setEmpty(); 16783616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 16793616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy 16803616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy // even if there is not selected position, we may need to restore 16813616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy // focus (i.e. something focusable in touch mode) 16823616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (hasFocus() && focusLayoutRestoreView != null) { 16833616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy focusLayoutRestoreView.requestFocus(); 16843616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 16859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // tell focus view we are done mucking with it, if it is still in 16889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // our view hierarchy. 16899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusLayoutRestoreView != null 16909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && focusLayoutRestoreView.getWindowToken() != null) { 16919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusLayoutRestoreView.onFinishTemporaryDetach(); 16929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_NORMAL; 16959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataChanged = false; 16969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNeedSync = false; 16979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(mSelectedPosition); 16989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project updateScrollIndicators(); 17009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0) { 17029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 17039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 17069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 17079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!blockLayoutRequests) { 17089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBlockLayoutRequests = false; 17099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 17149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child a direct child of this list. 17159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether child is a header or footer view. 17169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isDirectChildHeaderOrFooter(View child) { 17189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ArrayList<FixedViewInfo> headers = mHeaderViewInfos; 17209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numHeaders = headers.size(); 17219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numHeaders; i++) { 17229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == headers.get(i).view) { 17239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 17249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ArrayList<FixedViewInfo> footers = mFooterViewInfos; 17279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numFooters = footers.size(); 17289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numFooters; i++) { 17299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == footers.get(i).view) { 17309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 17319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 17349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 17379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Obtain the view and add it to our list of children. The view can be made 17389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * fresh, converted from an unused view, or used as is if it was in the 17399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * recycle bin. 17409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 17419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Logical position in the list 17429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y Top or bottom edge of the view to add 17439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flow If flow is true, align top edge to y. If false, align bottom 17449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge to y. 17459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenLeft Left edge where children should be positioned 17469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selected Is this position selected? 17479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return View that was added 17489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View makeAndAddView(int position, int y, boolean flow, int childrenLeft, 17509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected) { 17519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 17529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mDataChanged) { 1755079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn // Try to use an existing view for this position 17569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = mRecycler.getActiveView(position); 17579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 17589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ViewDebug.TRACE_RECYCLER) { 17599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewDebug.trace(child, ViewDebug.RecyclerTraceType.RECYCLE_FROM_ACTIVE_HEAP, 17609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position, getChildCount()); 17619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Found it -- we're using an existing child 17649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This just needs to be positioned 17659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setupChild(child, position, y, flow, childrenLeft, selected, true); 17669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 17689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make a new view for this position, or convert an unused view if possible 177221875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy child = obtainView(position, mIsScrap); 17739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This needs to be positioned and measured 177521875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy setupChild(child, position, y, flow, childrenLeft, selected, mIsScrap[0]); 17769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 17789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 17819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a view as a child and make sure it is measured (if necessary) and 17829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * positioned properly. 17839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 17849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The view to add 17859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The position of this child 17869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y position relative to which this view will be positioned 17879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flowDown If true, align top edge to y. If false, align bottom 17889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge to y. 17899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenLeft Left edge where children should be positioned 17909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selected Is this position selected? 17919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param recycled Has this view been pulled from the recycle bin? If so it 17929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * does not need to be remeasured. 17939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void setupChild(View child, int position, int y, boolean flowDown, int childrenLeft, 17959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected, boolean recycled) { 17969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean isSelected = selected && shouldShowSelector(); 17979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean updateChildSelected = isSelected != child.isSelected(); 17983616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final int mode = mTouchMode; 17993616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL && 18003616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy mMotionPosition == position; 18013616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy final boolean updateChildPressed = isPressed != child.isPressed(); 18029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean needToMeasure = !recycled || updateChildSelected || child.isLayoutRequested(); 18039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Respect layout params that are already in the view. Otherwise make some up... 18059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // noinspection unchecked 18069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project AbsListView.LayoutParams p = (AbsListView.LayoutParams) child.getLayoutParams(); 18079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 1808980a938c1c9a6a5791a8240e5a1e6638ab28dc77Romain Guy p = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 18099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT, 0); 18109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p.viewType = mAdapter.getItemViewType(position); 18129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18130bf88594c43ced48d862d122e3e84967b3b63658Romain Guy if ((recycled && !p.forceAdd) || (p.recycledHeaderFooter && 1814c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER)) { 18159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project attachViewToParent(child, flowDown ? -1 : 0, p); 18169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 18170bf88594c43ced48d862d122e3e84967b3b63658Romain Guy p.forceAdd = false; 18184df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project if (p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER) { 18194df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project p.recycledHeaderFooter = true; 18204df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project } 18219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addViewInLayout(child, flowDown ? -1 : 0, p, true); 18229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (updateChildSelected) { 18259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setSelected(isSelected); 18269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18283616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy if (updateChildPressed) { 18293616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy child.setPressed(isPressed); 18303616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy } 18313616a412cbd620168fd87ce83978d83a9c0621c6Romain Guy 18329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null) { 18339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child instanceof Checkable) { 18349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ((Checkable) child).setChecked(mCheckStates.get(position)); 1835d0fa371f276fde32d81c037006941bc93da0bb03Dianne Hackborn } else if (getContext().getApplicationInfo().targetSdkVersion 1836d0fa371f276fde32d81c037006941bc93da0bb03Dianne Hackborn >= android.os.Build.VERSION_CODES.HONEYCOMB) { 1837d0fa371f276fde32d81c037006941bc93da0bb03Dianne Hackborn child.setActivated(mCheckStates.get(position)); 18389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToMeasure) { 18429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 18439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 18449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 18459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 18469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 18479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 18489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 18499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 18509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 18529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 18539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cleanupLayoutState(child); 18549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int w = child.getMeasuredWidth(); 18579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int h = child.getMeasuredHeight(); 18589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childTop = flowDown ? y : y - h; 18599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToMeasure) { 18619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childRight = childrenLeft + w; 18629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childBottom = childTop + h; 18639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childrenLeft, childTop, childRight, childBottom); 18649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 18659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.offsetLeftAndRight(childrenLeft - child.getLeft()); 18669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.offsetTopAndBottom(childTop - child.getTop()); 18679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCachingStarted && !child.isDrawingCacheEnabled()) { 18709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setDrawingCacheEnabled(true); 18719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1872079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn 1873079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn if (recycled && (((AbsListView.LayoutParams)child.getLayoutParams()).scrappedFromPosition) 1874079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn != position) { 1875079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn child.jumpDrawablesToCurrentState(); 1876079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn } 18779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 18809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean canAnimate() { 18819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.canAnimate() && mItemCount > 0; 18829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 18859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the currently selected item. If in touch mode, the item will not be selected 18869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * but it will still be positioned appropriately. If the specified selection position 18879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is less than 0, then the item at position 0 will be selected. 18889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 18899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Index (starting at 0) of the data item to be selected. 18909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 18919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 18929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelection(int position) { 18939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionFromTop(position, 0); 18949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 18979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the selected item and positions the selection y pixels from the top edge 18989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the ListView. (If in touch mode, the item will not be selected but it will 18999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * still be positioned appropriately.) 19009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 19019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Index (starting at 0) of the data item to be selected. 19029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The distance from the top edge of the ListView (plus padding) that the 19039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * item will be positioned. 19049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 19059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelectionFromTop(int position, int y) { 19069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter == null) { 19079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 19089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!isInTouchMode()) { 19119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(position, true); 19129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 19139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 19149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResurrectToPosition = position; 19179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 19209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SPECIFIC; 19219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpecificTop = mListPadding.top + y; 19229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNeedSync) { 19249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSyncPosition = position; 19259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSyncRowId = mAdapter.getItemId(position); 19269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 19299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 19339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Makes the item at the supplied position selected. 1934f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron * 19359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position the position of the item to select 19369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 19379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 19389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void setSelectionInt(int position) { 19399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 1940f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron boolean awakeScrollbars = false; 1941f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 1942f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron final int selectedPosition = mSelectedPosition; 1943f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 1944f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (selectedPosition >= 0) { 1945f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (position == selectedPosition - 1) { 1946f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakeScrollbars = true; 1947f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } else if (position == selectedPosition + 1) { 1948f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakeScrollbars = true; 1949f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 1950f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 1951f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 19529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layoutChildren(); 1953f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron 1954f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (awakeScrollbars) { 1955f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakenScrollBars(); 1956f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 19579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 19609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Find a position that can be selected (i.e., is not a separator). 19619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 19629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The starting position to look at. 19639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param lookDown Whether to look down for other positions. 19649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The next selectable position starting at position and then searching either up or 19659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down. Returns {@link #INVALID_POSITION} if nothing can be found. 19669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 19679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 19689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lookForSelectablePosition(int position, boolean lookDown) { 19699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = mAdapter; 19709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter == null || isInTouchMode()) { 19719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 19729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = adapter.getCount(); 19759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mAreAllItemsSelectable) { 19769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lookDown) { 19779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = Math.max(0, position); 19789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (position < count && !adapter.isEnabled(position)) { 19799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position++; 19809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = Math.min(position, count - 1); 19839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (position >= 0 && !adapter.isEnabled(position)) { 19849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position--; 19859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position < 0 || position >= count) { 19899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 19909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return position; 19929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position < 0 || position >= count) { 19949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 19959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return position; 19979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 20019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * setSelectionAfterHeaderView set the selection to be the first list item 20029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * after the header views. 20039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 20049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelectionAfterHeaderView() { 20059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = mHeaderViewInfos.size(); 20069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 20079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextSelectedPosition = 0; 20089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 20099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter != null) { 20129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelection(count); 20139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 20149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextSelectedPosition = count; 20159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SET_SELECTION; 20169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 20219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 20229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Dispatch in the normal way 20239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = super.dispatchKeyEvent(event); 20249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!handled) { 20259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If we didn't handle it... 20269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focused = getFocusedChild(); 20279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focused != null && event.getAction() == KeyEvent.ACTION_DOWN) { 20289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and our focused child didn't handle it 20299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... give it to ourselves so we can scroll if necessary 20309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = onKeyDown(event.getKeyCode(), event); 20319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 20349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 20379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyDown(int keyCode, KeyEvent event) { 20389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, 1, event); 20399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 20429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 20439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, repeatCount, event); 20449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 20479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyUp(int keyCode, KeyEvent event) { 20489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, 1, event); 20499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean commonKey(int keyCode, int count, KeyEvent event) { 2052a2b986e72c403f0b2ea593884e3135254bb83d30Adam Powell if (mAdapter == null || !mIsAttached) { 20539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 20549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDataChanged) { 20579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layoutChildren(); 20589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 20619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int action = event.getAction(); 20629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (action != KeyEvent.ACTION_UP) { 20649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 20659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_UP: 20664e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 20678d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded(); 20688d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (!handled) { 20694e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown while (count-- > 0) { 20708d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (arrowScroll(FOCUS_UP)) { 20718d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = true; 20728d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } else { 20738d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown break; 20748d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 20754e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 20769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20774e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 20788d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); 20799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 20819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_DOWN: 20834e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 20848d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded(); 20858d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (!handled) { 20864e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown while (count-- > 0) { 20878d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (arrowScroll(FOCUS_DOWN)) { 20888d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = true; 20898d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } else { 20908d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown break; 20918d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 20924e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 20939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20944e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 20958d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); 20969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 20989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 21004e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21014e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown handled = handleHorizontalFocusWithinListItem(View.FOCUS_LEFT); 21024e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 21044e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 21059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 21064e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21074e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown handled = handleHorizontalFocusWithinListItem(View.FOCUS_RIGHT); 21084e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 21109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 21129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: 21138d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (event.hasNoModifiers()) { 21148d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded(); 21158d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (!handled 21168d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown && event.getRepeatCount() == 0 && getChildCount() > 0) { 21178d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown keyPressed(); 21188d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = true; 21198d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 21209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 21229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 21249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mPopup == null || !mPopup.isShowing()) { 21254e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21268d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_DOWN); 21274e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) { 21288d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_UP); 21299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = true; 21319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 21334e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 21344e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_PAGE_UP: 21354e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21368d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_UP); 21374e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 21388d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); 21394e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21404e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 21414e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 21424e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_PAGE_DOWN: 21434e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21448d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_DOWN); 21454e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_ALT_ON)) { 21468d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); 21474e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21484e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 21494e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 21504e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_MOVE_HOME: 21514e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21528d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); 21534e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21544e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 21554e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 21564e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_MOVE_END: 21574e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21588d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); 21594e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21604e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 21614e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 21624e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown case KeyEvent.KEYCODE_TAB: 21634e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // XXX Sometimes it is useful to be able to TAB through the items in 21644e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // a ListView sequentially. Unfortunately this can create an 21654e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // asymmetry in TAB navigation order unless the list selection 21664e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // always reverts to the top or bottom when receiving TAB focus from 21674e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // another widget. Leaving this behavior disabled for now but 21684e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown // perhaps it should be configurable (and more comprehensive). 21694e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (false) { 21704e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (event.hasNoModifiers()) { 21718d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || arrowScroll(FOCUS_DOWN); 21724e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) { 21738d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown handled = resurrectSelectionIfNeeded() || arrowScroll(FOCUS_UP); 21744e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21754e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 21764e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown break; 21779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21808d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (handled) { 21818d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return true; 21829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21848d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown if (sendToTextFilter(keyCode, count, event)) { 21859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 21868d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown } 21879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21888d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown switch (action) { 21898d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown case KeyEvent.ACTION_DOWN: 21908d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return super.onKeyDown(keyCode, event); 21919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21928d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown case KeyEvent.ACTION_UP: 21938d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return super.onKeyUp(keyCode, event); 21949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21958d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown case KeyEvent.ACTION_MULTIPLE: 21968d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return super.onKeyMultiple(keyCode, count, event); 21978d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown 21988d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown default: // shouldn't happen 21998d6d3b83fb765eefc6fd38de77f1f45d2523ab89Jeff Brown return false; 22009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 22049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls up or down by the number of items currently present on screen. 22059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 22069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 22079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 22089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 22099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean pageScroll(int direction) { 22109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int nextPage = -1; 22119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean down = false; 22129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == FOCUS_UP) { 22149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextPage = Math.max(0, mSelectedPosition - getChildCount() - 1); 22159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == FOCUS_DOWN) { 22169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextPage = Math.min(mItemCount - 1, mSelectedPosition + getChildCount() - 1); 22179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project down = true; 22189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextPage >= 0) { 22219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = lookForSelectablePosition(nextPage, down); 22229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 22239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SPECIFIC; 22249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpecificTop = mPaddingTop + getVerticalFadingEdgeLength(); 22259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down && position > mItemCount - getChildCount()) { 22279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_BOTTOM; 22289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!down && position < getChildCount()) { 22319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_TOP; 22329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 22359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 2236f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (!awakenScrollBars()) { 2237f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron invalidate(); 2238f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 22399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 22419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 22459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 22489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Go to the last or first item if possible (not worrying about panning across or navigating 22499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within the internal focus of the currently selected item.) 22509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 22519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 22529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 22539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 22549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 22559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean fullScroll(int direction) { 22569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean moved = false; 22579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == FOCUS_UP) { 22589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition != 0) { 22599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = lookForSelectablePosition(0, true); 22609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 22619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_TOP; 22629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 22639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 22649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project moved = true; 22669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == FOCUS_DOWN) { 22689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition < mItemCount - 1) { 22699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = lookForSelectablePosition(mItemCount - 1, true); 22709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 22719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_BOTTOM; 22729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 22739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 22749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project moved = true; 22769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2279f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (moved && !awakenScrollBars()) { 2280f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron awakenScrollBars(); 22819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 22829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return moved; 22859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 22889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * To avoid horizontal focus searches changing the selected item, we 22899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manually focus search within the selected item (as applicable), and 22909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * prevent focus from jumping to something within another item. 22919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction one of {View.FOCUS_LEFT, View.FOCUS_RIGHT} 22929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether this consumes the key event. 22939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 22949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean handleHorizontalFocusWithinListItem(int direction) { 22959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction != View.FOCUS_LEFT && direction != View.FOCUS_RIGHT) { 2296304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy throw new IllegalArgumentException("direction must be one of" 2297304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy + " {View.FOCUS_LEFT, View.FOCUS_RIGHT}"); 22989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 23019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && numChildren > 0 && mSelectedPosition != INVALID_POSITION) { 23029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View selectedView = getSelectedView(); 2303304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy if (selectedView != null && selectedView.hasFocus() && 2304304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy selectedView instanceof ViewGroup) { 2305304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy 23069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View currentFocus = selectedView.findFocus(); 23079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = FocusFinder.getInstance().findNextFocus( 2308304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy (ViewGroup) selectedView, currentFocus, direction); 23099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus != null) { 23109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // do the math to get interesting rect in next focus' coordinates 23119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocus.getFocusedRect(mTempRect); 23129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocus, mTempRect); 23139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetRectIntoDescendantCoords(nextFocus, mTempRect); 23149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus.requestFocus(direction, mTempRect)) { 23159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 23169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we are blocking the key from being handled (by returning true) 23199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the global result is going to be some other view within this 23209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // list. this is to acheive the overall goal of having 23219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // horizontal d-pad navigation remain in the current item. 2322304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy final View globalNextFocus = FocusFinder.getInstance().findNextFocus( 2323304eefa6a33da9b75b4075cc7eb170cf4ced4cdbRomain Guy (ViewGroup) getRootView(), currentFocus, direction); 23249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (globalNextFocus != null) { 23259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return isViewAncestorOf(globalNextFocus, this); 23269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 23309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 23339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls to the next or previous item if possible. 23349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 23359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 23369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 23379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 23389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean arrowScroll(int direction) { 23409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 23419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = true; 23429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean handled = arrowScrollImpl(direction); 23439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (handled) { 23449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project playSoundEffect(SoundEffectConstants.getContantForFocusDirection(direction)); 23459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 23479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 23489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = false; 23499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 23539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle an arrow scroll going up or down. Take into account whether items are selectable, 23549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether there are focusable items etc. 23559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 23569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction Either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN}. 23579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether any scrolling, selection or focus change occured. 23589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean arrowScrollImpl(int direction) { 23609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() <= 0) { 23619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 23629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = getSelectedView(); 2365079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn int selectedPos = mSelectedPosition; 23669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); 23689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = amountToScroll(direction, nextSelectedPosition); 23699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if we are moving focus, we may OVERRIDE the default behavior 23719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ArrowScrollFocusResult focusResult = mItemsCanFocus ? arrowScrollFocused(direction) : null; 23729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusResult != null) { 23739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextSelectedPosition = focusResult.getSelectedPosition(); 23749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = focusResult.getAmountToScroll(); 23759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean needToRedraw = focusResult != null; 23789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 23799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); 23809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(nextSelectedPosition); 23819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(nextSelectedPosition); 23829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = getSelectedView(); 2383079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn selectedPos = nextSelectedPosition; 23849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && focusResult == null) { 23859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // there was no new view found to take focus, make sure we 23869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // don't leave focus with the old selection 23879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focused = getFocusedChild(); 23889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focused != null) { 23899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focused.clearFocus(); 23909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project needToRedraw = true; 23939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 23949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (amountToScroll > 0) { 23979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollListItemsBy((direction == View.FOCUS_UP) ? amountToScroll : -amountToScroll); 23989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project needToRedraw = true; 23999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if we didn't find a new focusable, make sure any existing focused 24029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item that was panned off screen gives up focus. 24039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && (focusResult == null) 24049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && selectedView != null && selectedView.hasFocus()) { 24059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focused = selectedView.findFocus(); 24061ea6889136cdad8fc01de0665b3a16a4dcb259feMark Brophy if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { 24079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focused.clearFocus(); 24089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the current selection is panned off, we need to remove the selection 24129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition == INVALID_POSITION && selectedView != null 24139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && !isViewAncestorOf(selectedView, this)) { 24149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = null; 24159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project hideSelector(); 24169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // but we don't want to set the ressurect position (that would make subsequent 24189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // unhandled key events bring back the item we just scrolled off!) 24199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResurrectToPosition = INVALID_POSITION; 24209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToRedraw) { 24239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedView != null) { 2424079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn positionSelector(selectedPos, selectedView); 24259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = selectedView.getTop(); 24269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2427f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron if (!awakenScrollBars()) { 2428f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron invalidate(); 2429f116bf8884b5b58aae261d148003811aa4a7c6e9Mike Cleron } 24309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 24319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 24329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 24359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When selection changes, it is possible that the previously selected or the 24399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * next selected item will change its size. If so, we need to offset some folks, 24409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and re-layout the items as appropriate. 24419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 24429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedView The currently selected view (before changing selection). 24439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should be <code>null</code> if there was no previous selection. 24449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction Either {@link android.view.View#FOCUS_UP} or 24459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 24469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newSelectedPosition The position of the next selection. 24479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocusAssigned whether new focus was assigned. This matters because 24489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * when something has focus, we don't want to show selection (ugh). 24499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 24509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void handleNewSelectionChange(View selectedView, int direction, int newSelectedPosition, 24519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean newFocusAssigned) { 24529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSelectedPosition == INVALID_POSITION) { 24539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("newSelectedPosition needs to be valid"); 24549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // whether or not we are moving down or up, we want to preserve the 24579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top of whatever view is on top: 24589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // - moving down: the view that had selection 24599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // - moving up: the view that is getting selection 24609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View topView; 24619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View bottomView; 24629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topViewIndex, bottomViewIndex; 24639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean topSelected = false; 24649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedIndex = mSelectedPosition - mFirstPosition; 24659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int nextSelectedIndex = newSelectedPosition - mFirstPosition; 24669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP) { 24679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topViewIndex = nextSelectedIndex; 24689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomViewIndex = selectedIndex; 24699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView = getChildAt(topViewIndex); 24709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView = selectedView; 24719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topSelected = true; 24729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 24739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topViewIndex = selectedIndex; 24749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomViewIndex = nextSelectedIndex; 24759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView = selectedView; 24769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView = getChildAt(bottomViewIndex); 24779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 24809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // start with top view: is it changing size? 24829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (topView != null) { 24839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView.setSelected(!newFocusAssigned && topSelected); 24849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureAndAdjustDown(topView, topViewIndex, numChildren); 24859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is the bottom view changing size? 24889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bottomView != null) { 24899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView.setSelected(!newFocusAssigned && !topSelected); 24909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureAndAdjustDown(bottomView, bottomViewIndex, numChildren); 24919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Re-measure a child, and if its height changes, lay it out preserving its 24969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top, and adjust the children below it appropriately. 24979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child 24989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childIndex The view group index of the child. 24999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param numChildren The number of children in the view group. 25009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureAndAdjustDown(View child, int childIndex, int numChildren) { 25029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldHeight = child.getHeight(); 25039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureItem(child); 25049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getMeasuredHeight() != oldHeight) { 25059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // lay out the view, preserving its top 25069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project relayoutMeasuredItem(child); 25079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // adjust views below appropriately 25099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int heightDelta = child.getMeasuredHeight() - oldHeight; 25109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = childIndex + 1; i < numChildren; i++) { 25119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChildAt(i).offsetTopAndBottom(heightDelta); 25129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Measure a particular list child. 25189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * TODO: unify with setUpChild. 25199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child. 25209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureItem(View child) { 25229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams p = child.getLayoutParams(); 25239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 25249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p = new ViewGroup.LayoutParams( 2525980a938c1c9a6a5791a8240e5a1e6638ab28dc77Romain Guy ViewGroup.LayoutParams.MATCH_PARENT, 25269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT); 25279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 25309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 25319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 25329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 25339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 25349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 25359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 25369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 25379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 25399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout a child that has been measured, preserving its top position. 25439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * TODO: unify with setUpChild. 25449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child. 25459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void relayoutMeasuredItem(View child) { 25479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int w = child.getMeasuredWidth(); 25489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int h = child.getMeasuredHeight(); 25499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childLeft = mListPadding.left; 25509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childRight = childLeft + w; 25519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childTop = child.getTop(); 25529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childBottom = childTop + h; 25539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childLeft, childTop, childRight, childBottom); 25549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to preview next items when arrow srolling. 25589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getArrowScrollPreviewLength() { 25609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.max(MIN_SCROLL_PREVIEW_PIXELS, getVerticalFadingEdgeLength()); 25619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine how much we need to scroll in order to get the next selected view 25659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible, with a fading edge showing below as applicable. The amount is 25669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * capped at {@link #getMaxScrollAmount()} . 25679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 25689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 25699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 25709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextSelectedPosition The position of the next selection, or 25719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #INVALID_POSITION} if there is no next selectable position 25729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to scroll. Note: this is always positive! Direction 25739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needs to be taken into account when actually scrolling. 25749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int amountToScroll(int direction, int nextSelectedPosition) { 25769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 25779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top; 25789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 25809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 25829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int indexToMakeVisible = numChildren - 1; 25839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 25849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project indexToMakeVisible = nextSelectedPosition - mFirstPosition; 25859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionToMakeVisible = mFirstPosition + indexToMakeVisible; 25889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View viewToMakeVisible = getChildAt(indexToMakeVisible); 25899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int goalBottom = listBottom; 25919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionToMakeVisible < mItemCount - 1) { 25929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project goalBottom -= getArrowScrollPreviewLength(); 25939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewToMakeVisible.getBottom() <= goalBottom) { 25969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item is fully visible. 25979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 25989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION 26019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (goalBottom - viewToMakeVisible.getTop()) >= getMaxScrollAmount()) { 26029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item already has enough of it visible, changing selection is good enough 26039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 26049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = (viewToMakeVisible.getBottom() - goalBottom); 26079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mFirstPosition + numChildren) == mItemCount) { 26099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // last is last in list -> make sure we don't scroll past it 26109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int max = getChildAt(numChildren - 1).getBottom() - listBottom; 26119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = Math.min(amountToScroll, max); 26129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.min(amountToScroll, getMaxScrollAmount()); 26159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 26169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int indexToMakeVisible = 0; 26179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 26189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project indexToMakeVisible = nextSelectedPosition - mFirstPosition; 26199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionToMakeVisible = mFirstPosition + indexToMakeVisible; 26219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View viewToMakeVisible = getChildAt(indexToMakeVisible); 26229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int goalTop = listTop; 26239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionToMakeVisible > 0) { 26249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project goalTop += getArrowScrollPreviewLength(); 26259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewToMakeVisible.getTop() >= goalTop) { 26279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item is fully visible. 26289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 26299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION && 26329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewToMakeVisible.getBottom() - goalTop) >= getMaxScrollAmount()) { 26339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item already has enough of it visible, changing selection is good enough 26349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 26359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = (goalTop - viewToMakeVisible.getTop()); 26389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0) { 26399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first is first in list -> make sure we don't scroll past it 26409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int max = listTop - getChildAt(0).getTop(); 26419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = Math.min(amountToScroll, max); 26429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.min(amountToScroll, getMaxScrollAmount()); 26449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Holds results of focus aware arrow scrolling. 26499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static private class ArrowScrollFocusResult { 26519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mSelectedPosition; 26529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mAmountToScroll; 26539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * How {@link android.widget.ListView#arrowScrollFocused} returns its values. 26569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void populate(int selectedPosition, int amountToScroll) { 26589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition = selectedPosition; 26599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAmountToScroll = amountToScroll; 26609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSelectedPosition() { 26639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSelectedPosition; 26649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getAmountToScroll() { 26679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mAmountToScroll; 26689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 26739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 26749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The position of the next selectable position of the views that 26759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * are currently visible, taking into account the fact that there might 26769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be no selection. Returns {@link #INVALID_POSITION} if there is no 26779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selectable view on screen in the given direction. 26789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int lookForSelectablePositionOnScreen(int direction) { 26809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstPosition = mFirstPosition; 26819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 26829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int startPos = (mSelectedPosition != INVALID_POSITION) ? 26839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition + 1 : 26849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project firstPosition; 26859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos >= mAdapter.getCount()) { 26869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 26879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos < firstPosition) { 26899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startPos = firstPosition; 26909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePos = getLastVisiblePosition(); 26939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = getAdapter(); 26949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int pos = startPos; pos <= lastVisiblePos; pos++) { 26959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter.isEnabled(pos) 26969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) { 26979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return pos; 26989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 27019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int last = firstPosition + getChildCount() - 1; 27029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int startPos = (mSelectedPosition != INVALID_POSITION) ? 27039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition - 1 : 27049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project firstPosition + getChildCount() - 1; 27055d9d03a0234faa3cffd11502f973057045cafe82Dianne Hackborn if (startPos < 0 || startPos >= mAdapter.getCount()) { 27069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 27079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos > last) { 27099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startPos = last; 27109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = getAdapter(); 27139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int pos = startPos; pos >= firstPosition; pos--) { 27149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter.isEnabled(pos) 27159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) { 27169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return pos; 27179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 27219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 27249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Do an arrow scroll based on focus searching. If a new view is 27259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * given focus, return the selection delta and amount to scroll via 27269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an {@link ArrowScrollFocusResult}, otherwise, return null. 27279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 27289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 27299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 27309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The result if focus has changed, or <code>null</code>. 27319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 27329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrowScrollFocusResult arrowScrollFocused(final int direction) { 27339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View selectedView = getSelectedView(); 27349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocus; 27359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedView != null && selectedView.hasFocus()) { 27369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldFocus = selectedView.findFocus(); 27379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); 27389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 27399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 27409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean topFadingEdgeShowing = (mFirstPosition > 0); 27419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top + 27429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (topFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); 27439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int ySearchPoint = 27449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (selectedView != null && selectedView.getTop() > listTop) ? 27459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView.getTop() : 27469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listTop; 27479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.set(0, ySearchPoint, 0, ySearchPoint); 27489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 27499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean bottomFadingEdgeShowing = 27509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (mFirstPosition + getChildCount() - 1) < mItemCount; 27519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom - 27529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (bottomFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); 27539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int ySearchPoint = 27549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (selectedView != null && selectedView.getBottom() < listBottom) ? 27559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView.getBottom() : 27569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listBottom; 27579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.set(0, ySearchPoint, 0, ySearchPoint); 27589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); 27609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocus != null) { 27639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionOfNewFocus = positionOfNewFocus(newFocus); 27649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the focus change is in a different new position, make sure 27669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we aren't jumping over another selectable position 27679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { 27689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectablePosition = lookForSelectablePositionOnScreen(direction); 27699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectablePosition != INVALID_POSITION && 27709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ((direction == View.FOCUS_DOWN && selectablePosition < positionOfNewFocus) || 27719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (direction == View.FOCUS_UP && selectablePosition > positionOfNewFocus))) { 27729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 27739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); 27779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxScrollAmount = getMaxScrollAmount(); 27799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusScroll < maxScrollAmount) { 27809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // not moving too far, safe to give next view focus 27819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.requestFocus(direction); 27829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); 27839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mArrowScrollFocusResult; 27849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (distanceToView(newFocus) < maxScrollAmount){ 27859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Case to consider: 27869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // too far to get entire next focusable on screen, but by going 27879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // max scroll amount, we are getting it at least partially in view, 27889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so give it focus and scroll the max ammount. 27899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.requestFocus(direction); 27909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); 27919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mArrowScrollFocusResult; 27929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 27959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 27989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocus The view that would have focus. 27999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the position that contains newFocus 28009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int positionOfNewFocus(View newFocus) { 28029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 28039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numChildren; i++) { 28049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View child = getChildAt(i); 28059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isViewAncestorOf(newFocus, child)) { 28069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFirstPosition + i; 28079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("newFocus is not a child of any of the" 28109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + " children of the list!"); 28119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return true if child is an ancestor of parent, (or equal to the parent). 28159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isViewAncestorOf(View child, View parent) { 28179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 28189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 28199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 28229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewAncestorOf((View) theParent, parent); 28239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine how much we need to scroll in order to get newFocus in view. 28279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 28289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 28299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocus The view that would take focus. 28309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param positionOfNewFocus The position of the list item containing newFocus 28319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to scroll. Note: this is always positive! Direction 28329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needs to be taken into account when actually scrolling. 28339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int amountToScrollToNewFocus(int direction, View newFocus, int positionOfNewFocus) { 28359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = 0; 28369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.getDrawingRect(mTempRect); 28379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(newFocus, mTempRect); 28389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP) { 28399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.top < mListPadding.top) { 28409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = mListPadding.top - mTempRect.top; 28419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionOfNewFocus > 0) { 28429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll += getArrowScrollPreviewLength(); 28439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 28469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 28479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.bottom > listBottom) { 28489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = mTempRect.bottom - listBottom; 28499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionOfNewFocus < mItemCount - 1) { 28509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll += getArrowScrollPreviewLength(); 28519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return amountToScroll; 28559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine the distance to the nearest edge of a view in a particular 2859fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * direction. 2860fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * 28619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param descendant A descendant of this list. 28629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The distance, or 0 if the nearest edge is already on screen. 28639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int distanceToView(View descendant) { 28659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = 0; 28669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 28679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 28689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = mBottom - mTop - mListPadding.bottom; 28699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.bottom < mListPadding.top) { 28709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project distance = mListPadding.top - mTempRect.bottom; 28719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (mTempRect.top > listBottom) { 28729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project distance = mTempRect.top - listBottom; 28739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return distance; 28759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scroll the children by amount, adding a view at the end and removing 28809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views that fall off as necessary. 28819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 28829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param amount The amount (positive or negative) to scroll. 28839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollListItemsBy(int amount) { 28859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(amount); 28869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 28889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top; 2889c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project final AbsListView.RecycleBin recycleBin = mRecycler; 28909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (amount < 0) { 28929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // shifted items up 28939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may need to pan views into the bottom space 28959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numChildren = getChildCount(); 28969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View last = getChildAt(numChildren - 1); 28979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (last.getBottom() < listBottom) { 28989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePosition = mFirstPosition + numChildren - 1; 28999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastVisiblePosition < mItemCount - 1) { 29009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project last = addViewBelow(last, lastVisiblePosition); 29019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project numChildren++; 29029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 29039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 29049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may have brought in the last child of the list that is skinnier 29089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // than the fading edge, thereby leaving space at the end. need 29099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // to shift back 29109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (last.getBottom() < listBottom) { 29119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(listBottom - last.getBottom()); 29129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top views may be panned off screen 29159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View first = getChildAt(0); 29169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (first.getBottom() < listTop) { 2917c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project AbsListView.LayoutParams layoutParams = (LayoutParams) first.getLayoutParams(); 2918c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project if (recycleBin.shouldRecycleViewType(layoutParams.viewType)) { 29192d51bff2b6597804307d8883a071ff18adc2644aRomain Guy detachViewFromParent(first); 2920079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(first, mFirstPosition); 2921c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } else { 29222d51bff2b6597804307d8883a071ff18adc2644aRomain Guy removeViewInLayout(first); 2923c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } 29249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project first = getChildAt(0); 29259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition++; 29269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 29289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // shifted items down 29299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View first = getChildAt(0); 29309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may need to pan views into top 29329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ((first.getTop() > listTop) && (mFirstPosition > 0)) { 29339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project first = addViewAbove(first, mFirstPosition); 29349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition--; 29359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may have brought the very first child of the list in too far and 29389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to shift it back 29399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (first.getTop() > listTop) { 29409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(listTop - first.getTop()); 29419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastIndex = getChildCount() - 1; 29449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View last = getChildAt(lastIndex); 29459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // bottom view may be panned off screen 29479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (last.getTop() > listBottom) { 2948c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project AbsListView.LayoutParams layoutParams = (LayoutParams) last.getLayoutParams(); 2949c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project if (recycleBin.shouldRecycleViewType(layoutParams.viewType)) { 29502d51bff2b6597804307d8883a071ff18adc2644aRomain Guy detachViewFromParent(last); 2951079e23575024e103358c982152afb7a720ae1a8aDianne Hackborn recycleBin.addScrapView(last, mFirstPosition+lastIndex); 2952c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } else { 29532d51bff2b6597804307d8883a071ff18adc2644aRomain Guy removeViewInLayout(last); 2954c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } 29559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project last = getChildAt(--lastIndex); 29569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View addViewAbove(View theView, int position) { 29619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int abovePosition = position - 1; 296221875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy View view = obtainView(abovePosition, mIsScrap); 29639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int edgeOfNewChild = theView.getTop() - mDividerHeight; 296421875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy setupChild(view, abovePosition, edgeOfNewChild, false, mListPadding.left, 296521875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy false, mIsScrap[0]); 29669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view; 29679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View addViewBelow(View theView, int position) { 29709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int belowPosition = position + 1; 297121875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy View view = obtainView(belowPosition, mIsScrap); 29729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int edgeOfNewChild = theView.getBottom() + mDividerHeight; 297321875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy setupChild(view, belowPosition, edgeOfNewChild, true, mListPadding.left, 297421875052adddf2b52bc57fea62bf097b8aa04cbfRomain Guy false, mIsScrap[0]); 29759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view; 29769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 29799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates that the views created by the ListAdapter can contain focusable 29809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. 29819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 29829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param itemsCanFocus true if items can get focus, false otherwise 29839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setItemsCanFocus(boolean itemsCanFocus) { 29859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemsCanFocus = itemsCanFocus; 29869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!itemsCanFocus) { 29879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS); 29889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 29929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the views created by the ListAdapter can contain focusable 29939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. 29949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean getItemsCanFocus() { 29969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mItemsCanFocus; 29979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 300024443ea3992e372e47daa50266b0f2ec38cac388Romain Guy public boolean isOpaque() { 30017840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase boolean retValue = (mCachingActive && mIsCacheColorOpaque && mDividerIsOpaque && 30028f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy hasOpaqueScrollbars()) || super.isOpaque(); 30037840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase if (retValue) { 30047840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase // only return true if the list items cover the entire area of the view 30053ba8f5d675831647e45d0ce11507c85dfb5f753bAdam Powell final int listTop = mListPadding != null ? mListPadding.top : mPaddingTop; 30067840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase View first = getChildAt(0); 30077840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase if (first == null || first.getTop() > listTop) { 30087840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase return false; 30097840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase } 30103ba8f5d675831647e45d0ce11507c85dfb5f753bAdam Powell final int listBottom = getHeight() - 30113ba8f5d675831647e45d0ce11507c85dfb5f753bAdam Powell (mListPadding != null ? mListPadding.bottom : mPaddingBottom); 30127840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase View last = getChildAt(getChildCount() - 1); 30137840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase if (last == null || last.getBottom() < listBottom) { 30147840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase return false; 30157840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase } 30167840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase } 30177840055f76f2ba1a0052aee09e578cf9314f5364Chet Haase return retValue; 301824443ea3992e372e47daa50266b0f2ec38cac388Romain Guy } 301924443ea3992e372e47daa50266b0f2ec38cac388Romain Guy 302024443ea3992e372e47daa50266b0f2ec38cac388Romain Guy @Override 302124443ea3992e372e47daa50266b0f2ec38cac388Romain Guy public void setCacheColorHint(int color) { 30228f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy final boolean opaque = (color >>> 24) == 0xFF; 30238f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy mIsCacheColorOpaque = opaque; 30248f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy if (opaque) { 3025a02903fbee6725563da4472bd120f844e9d5518cRomain Guy if (mDividerPaint == null) { 3026a02903fbee6725563da4472bd120f844e9d5518cRomain Guy mDividerPaint = new Paint(); 3027a02903fbee6725563da4472bd120f844e9d5518cRomain Guy } 30288f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy mDividerPaint.setColor(color); 30298f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy } 303024443ea3992e372e47daa50266b0f2ec38cac388Romain Guy super.setCacheColorHint(color); 303124443ea3992e372e47daa50266b0f2ec38cac388Romain Guy } 3032637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3033637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell void drawOverscrollHeader(Canvas canvas, Drawable drawable, Rect bounds) { 3034637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int height = drawable.getMinimumHeight(); 3035637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3036637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.save(); 3037637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.clipRect(bounds); 3038637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3039637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int span = bounds.bottom - bounds.top; 3040637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (span < height) { 3041637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bounds.bottom - height; 3042637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3043637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3044637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.setBounds(bounds); 3045637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.draw(canvas); 3046637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3047637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restore(); 3048637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3049637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3050637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell void drawOverscrollFooter(Canvas canvas, Drawable drawable, Rect bounds) { 3051637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int height = drawable.getMinimumHeight(); 3052637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3053637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.save(); 3054637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.clipRect(bounds); 3055637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3056637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int span = bounds.bottom - bounds.top; 3057637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (span < height) { 3058637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = bounds.top + height; 3059637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3060637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3061637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.setBounds(bounds); 3062637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawable.draw(canvas); 3063637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3064637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restore(); 3065637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3066637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 306724443ea3992e372e47daa50266b0f2ec38cac388Romain Guy @Override 30689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void dispatchDraw(Canvas canvas) { 30690211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy if (mCachingStarted) { 30700211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy mCachingActive = true; 30710211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy } 30720211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy 30739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the dividers 30749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 3075637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable overscrollHeader = mOverScrollHeader; 3076637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable overscrollFooter = mOverScrollFooter; 3077637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final boolean drawOverscrollHeader = overscrollHeader != null; 3078637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final boolean drawOverscrollFooter = overscrollFooter != null; 3079bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell final boolean drawDividers = dividerHeight > 0 && mDivider != null; 30809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3081637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawDividers || drawOverscrollHeader || drawOverscrollFooter) { 30829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Only modify the top and bottom in the loop, we set the left and right here 30839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Rect bounds = mTempRect; 30849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.left = mPaddingLeft; 30859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.right = mRight - mLeft - mPaddingRight; 30869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = getChildCount(); 30889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int headerCount = mHeaderViewInfos.size(); 3089bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell final int itemCount = mItemCount; 3090bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell final int footerLimit = itemCount - mFooterViewInfos.size() - 1; 30919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean headerDividers = mHeaderDividersEnabled; 30929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean footerDividers = mFooterDividersEnabled; 30939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int first = mFirstPosition; 30942bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy final boolean areAllItemsSelectable = mAreAllItemsSelectable; 30952bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy final ListAdapter adapter = mAdapter; 3096e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // If the list is opaque *and* the background is not, we want to 3097e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // fill a rect where the dividers would be for non-selectable items 3098e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // If the list is opaque and the background is also opaque, we don't 3099e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy // need to draw anything since the background will do it for us 3100179de8a37cb886e61264d2b7efd5bd4f29a5b381Romain Guy final boolean fillForMissingDividers = isOpaque() && !super.isOpaque(); 3101e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy 3102e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy if (fillForMissingDividers && mDividerPaint == null && mIsCacheColorOpaque) { 3103a02903fbee6725563da4472bd120f844e9d5518cRomain Guy mDividerPaint = new Paint(); 3104e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy mDividerPaint.setColor(getCacheColorHint()); 3105a02903fbee6725563da4472bd120f844e9d5518cRomain Guy } 31068f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy final Paint paint = mDividerPaint; 31079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31089456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell int effectivePaddingTop = 0; 31099456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell int effectivePaddingBottom = 0; 31109456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell if ((mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) { 31119456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell effectivePaddingTop = mListPadding.top; 31129456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell effectivePaddingBottom = mListPadding.bottom; 31139456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell } 31149456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell 31159456655f93f34a11f4b4696212f2649eed0c35dbAdam Powell final int listBottom = mBottom - mTop - effectivePaddingBottom + mScrollY; 31169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 3117637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int bottom = 0; 31180b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell 3119637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Draw top divider or header for overscroll 3120637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollY = mScrollY; 3121637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (count > 0 && scrollY < 0) { 3122637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawOverscrollHeader) { 3123637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = 0; 3124637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = scrollY; 3125637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollHeader(canvas, overscrollHeader, bounds); 3126637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (drawDividers) { 3127637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = 0; 3128637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = -dividerHeight; 3129637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawDivider(canvas, bounds, -1); 3130637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3131637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3132637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 31339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 31349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((headerDividers || first + i >= headerCount) && 31359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (footerDividers || first + i < footerLimit)) { 31369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(i); 31379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottom = child.getBottom(); 31382bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy // Don't draw dividers next to items that are not enabled 3139637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3140637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawDividers && 3141637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell (bottom < listBottom && !(drawOverscrollFooter && i == count - 1))) { 3142637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if ((areAllItemsSelectable || 3143637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell (adapter.isEnabled(first + i) && (i == count - 1 || 3144637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell adapter.isEnabled(first + i + 1))))) { 3145637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bottom; 3146637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = bottom + dividerHeight; 3147637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawDivider(canvas, bounds, i); 3148637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (fillForMissingDividers) { 3149637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bottom; 3150637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = bottom + dividerHeight; 3151637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.drawRect(bounds, paint); 3152637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 31539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3156637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3157637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overFooterBottom = mBottom + mScrollY; 3158637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawOverscrollFooter && first + count == itemCount && 3159637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell overFooterBottom > bottom) { 3160637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = bottom; 3161637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = overFooterBottom; 3162637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollFooter(canvas, overscrollFooter, bounds); 3163637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 31649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 31659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int top; 31669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3167bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell final int scrollY = mScrollY; 3168bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 3169637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (count > 0 && drawOverscrollHeader) { 3170637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = scrollY; 3171637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = getChildAt(0).getTop(); 3172637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollHeader(canvas, overscrollHeader, bounds); 3173637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3174637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3175637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int start = drawOverscrollHeader ? 1 : 0; 3176637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell for (int i = start; i < count; i++) { 31779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((headerDividers || first + i >= headerCount) && 31789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (footerDividers || first + i < footerLimit)) { 31799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(i); 31809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project top = child.getTop(); 31812bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy // Don't draw dividers next to items that are not enabled 31820211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy if (top > effectivePaddingTop) { 31838f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy if ((areAllItemsSelectable || 31848f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy (adapter.isEnabled(first + i) && (i == count - 1 || 31858f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy adapter.isEnabled(first + i + 1))))) { 31868f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.top = top - dividerHeight; 31878f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.bottom = top; 31888f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy // Give the method the child ABOVE the divider, so we 31898f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy // subtract one from our child 31908f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy // position. Give -1 when there is no child above the 31918f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy // divider. 31928f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy drawDivider(canvas, bounds, i - 1); 3193e32edc614e62ac874a969d3cc6bb1e0c0c3f2607Romain Guy } else if (fillForMissingDividers) { 31948f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.top = top - dividerHeight; 31958f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy bounds.bottom = top; 31968f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy canvas.drawRect(bounds, paint); 31978f1344f5e7c92f2fd532f65e5584afe0e4cc6b11Romain Guy } 31989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3201bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 3202179de8a37cb886e61264d2b7efd5bd4f29a5b381Romain Guy if (count > 0 && scrollY > 0) { 3203637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (drawOverscrollFooter) { 3204637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int absListBottom = mBottom; 3205637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = absListBottom; 3206637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = absListBottom + scrollY; 3207637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawOverscrollFooter(canvas, overscrollFooter, bounds); 3208637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (drawDividers) { 3209637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.top = listBottom; 3210637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell bounds.bottom = listBottom + dividerHeight; 3211637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell drawDivider(canvas, bounds, -1); 3212637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3213bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell } 32149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the indicators (these should be drawn above the dividers) and children 32189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.dispatchDraw(canvas); 32199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32210211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy @Override 32220211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy protected boolean drawChild(Canvas canvas, View child, long drawingTime) { 32230211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy boolean more = super.drawChild(canvas, child, drawingTime); 32240211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy if (mCachingActive && child.mCachingFailed) { 32250211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy mCachingActive = false; 32260211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy } 32270211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy return more; 32280211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy } 32290211a0a10d20ec99bd78905ea9cd2960f7beb4c8Romain Guy 32309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Draws a divider for the given child in the given bounds. 32329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param canvas The canvas to draw to. 32349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bounds The bounds of the divider. 32359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childIndex The index of child (of the View) above the divider. 32369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This will be -1 if there is no child above the divider to be 32379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drawn. 32389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void drawDivider(Canvas canvas, Rect bounds, int childIndex) { 32409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This widget draws the same divider for all children 32419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Drawable divider = mDivider; 32429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 324395930e13faac8c17dabfaa1478089baa772f091bRomain Guy divider.setBounds(bounds); 32449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project divider.draw(canvas); 32459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the drawable that will be drawn between each item in the list. 32499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the current drawable drawn between list elements 32519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Drawable getDivider() { 32539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDivider; 32549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the drawable that will be drawn between each item in the list. If the drawable does 32589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not have an intrinsic height, you should also call {@link #setDividerHeight(int)} 32599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param divider The drawable to use. 32619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setDivider(Drawable divider) { 32639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (divider != null) { 32649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = divider.getIntrinsicHeight(); 32659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 32669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = 0; 32679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDivider = divider; 326924443ea3992e372e47daa50266b0f2ec38cac388Romain Guy mDividerIsOpaque = divider == null || divider.getOpacity() == PixelFormat.OPAQUE; 3270eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy requestLayout(); 3271eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy invalidate(); 32729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns the height of the divider that will be drawn between each item in the list. 32769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getDividerHeight() { 32789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDividerHeight; 32799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the height of the divider that will be drawn between each item in the list. Calling 32839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this will override the intrinsic height as set by {@link #setDivider(Drawable)} 32849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The new height of the divider in pixels. 32869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setDividerHeight(int height) { 32889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = height; 3289eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy requestLayout(); 3290eeb55e673feca137bd0106ca31f9b68509a4ae36Romain Guy invalidate(); 32919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Enables or disables the drawing of the divider for header views. 32959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param headerDividersEnabled True to draw the headers, false otherwise. 32979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setFooterDividersEnabled(boolean) 32999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addHeaderView(android.view.View) 33009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 33019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setHeaderDividersEnabled(boolean headerDividersEnabled) { 33029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderDividersEnabled = headerDividersEnabled; 33039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 33049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 33069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 33079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Enables or disables the drawing of the divider for footer views. 33089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 33099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param footerDividersEnabled True to draw the footers, false otherwise. 33109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 33119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setHeaderDividersEnabled(boolean) 33129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addFooterView(android.view.View) 33139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 33149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFooterDividersEnabled(boolean footerDividersEnabled) { 33159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterDividersEnabled = footerDividersEnabled; 33169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 33179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3318bfb5d4b93bb739a012ecec604473838c1343c88aAdam Powell 3319637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3320637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * Sets the drawable that will be drawn above all other list content. 3321637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * This area can become visible when the user overscrolls the list. 3322637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * 3323637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @param header The drawable to use 3324637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3325637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverscrollHeader(Drawable header) { 3326637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverScrollHeader = header; 3327637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScrollY < 0) { 3328637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 3329637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3330637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3331637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3332637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3333637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @return The drawable that will be drawn above all other list content 3334637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3335637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public Drawable getOverscrollHeader() { 3336637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return mOverScrollHeader; 3337637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3338637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3339637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3340637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * Sets the drawable that will be drawn below all other list content. 3341637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * This area can become visible when the user overscrolls the list, 3342637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * or when the list's content does not fully fill the container area. 3343637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * 3344637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @param footer The drawable to use 3345637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3346637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverscrollFooter(Drawable footer) { 3347637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverScrollFooter = footer; 3348637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 3349637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3350637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 3351637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell /** 3352637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell * @return The drawable that will be drawn below all other list content 3353637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell */ 3354637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public Drawable getOverscrollFooter() { 3355637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return mOverScrollFooter; 3356637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 3357637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 33589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 33599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { 33609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 33619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3362e1bf486846ce7589727ad84440bd9a2d42751055Adam Powell final ListAdapter adapter = mAdapter; 33639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int closetChildIndex = -1; 3364dcce1216b0066f3f9ed1b01a485684e8617e7ea4Adam Powell int closestChildTop = 0; 3365e1bf486846ce7589727ad84440bd9a2d42751055Adam Powell if (adapter != null && gainFocus && previouslyFocusedRect != null) { 33669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect.offset(mScrollX, mScrollY); 33679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3368d7507834e73f32b4c82839036dc3897a1587e668Adam Powell // Don't cache the result of getChildCount or mFirstPosition here, 3369d7507834e73f32b4c82839036dc3897a1587e668Adam Powell // it could change in layoutChildren. 3370d7507834e73f32b4c82839036dc3897a1587e668Adam Powell if (adapter.getCount() < getChildCount() + mFirstPosition) { 3371c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell mLayoutMode = LAYOUT_NORMAL; 3372c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell layoutChildren(); 3373c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell } 3374c854f281a1c330931a2a03eef802ad7d4521998eAdam Powell 33759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // figure out which item should be selected based on previously 33769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // focused rect 33779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect otherRect = mTempRect; 33789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int minDistance = Integer.MAX_VALUE; 33799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 3380d7507834e73f32b4c82839036dc3897a1587e668Adam Powell final int firstPosition = mFirstPosition; 33819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 33829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < childCount; i++) { 33839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // only consider selectable views 33849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!adapter.isEnabled(firstPosition + i)) { 33859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 33869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 33889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View other = getChildAt(i); 33899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project other.getDrawingRect(otherRect); 33909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(other, otherRect); 33919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = getDistance(previouslyFocusedRect, otherRect, direction); 33929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 33939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (distance < minDistance) { 33949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project minDistance = distance; 33959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closetChildIndex = i; 3396dcce1216b0066f3f9ed1b01a485684e8617e7ea4Adam Powell closestChildTop = other.getTop(); 33979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 33999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (closetChildIndex >= 0) { 3402dcce1216b0066f3f9ed1b01a485684e8617e7ea4Adam Powell setSelectionFromTop(closetChildIndex + mFirstPosition, closestChildTop); 34039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 34049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 34059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 34109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (non-Javadoc) 34119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Children specified in XML are assumed to be header views. After we have 34139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * parsed them move them out of the children list and into mHeaderViews. 34149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 34169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFinishInflate() { 34179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFinishInflate(); 34189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 34209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 34219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; ++i) { 34229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addHeaderView(getChildAt(i)); 34239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeAllViews(); 34259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 34299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#findViewById(int) 34309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * First look in our children, then in any header and footer views that may be scrolled off. 34319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 34339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected View findViewTraversal(int id) { 34349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 34359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = super.findViewTraversal(id); 34369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v == null) { 34379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewInHeadersOrFooters(mHeaderViewInfos, id); 34389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 34399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 34409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewInHeadersOrFooters(mFooterViewInfos, id); 34429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 34439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 34449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 34479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 34509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Look in the passed in list of headers or footers for the view. 34529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View findViewInHeadersOrFooters(ArrayList<FixedViewInfo> where, int id) { 34549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (where != null) { 34559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 34569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 34579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; i++) { 34599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = where.get(i).view; 34609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!v.isRootNamespace()) { 34629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = v.findViewById(id); 34639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 34659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 34669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 34719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 34744e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * @see android.view.View#findViewWithTag(Object) 34759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * First look in our children, then in any header and footer views that may be scrolled off. 34769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 34789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected View findViewWithTagTraversal(Object tag) { 34799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 34809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = super.findViewWithTagTraversal(tag); 34819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v == null) { 34824e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = findViewWithTagInHeadersOrFooters(mHeaderViewInfos, tag); 34839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 34849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 34859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34874e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = findViewWithTagInHeadersOrFooters(mFooterViewInfos, tag); 34889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 34899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 34909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 34939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 34949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 34959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 34969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 34979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Look in the passed in list of headers or footers for the view with the tag. 34989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 34994e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View findViewWithTagInHeadersOrFooters(ArrayList<FixedViewInfo> where, Object tag) { 35009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (where != null) { 35019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 35029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 35039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; i++) { 35059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = where.get(i).view; 35069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!v.isRootNamespace()) { 35089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = v.findViewWithTag(tag); 35099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 35119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 35129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 35179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 35189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 35194e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown /** 35204e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * @hide 35214e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * @see android.view.View#findViewByPredicate(Predicate) 35224e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * First look in our children, then in any header and footer views that may be scrolled off. 35234e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown */ 35244e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown @Override 35254dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { 35264e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View v; 35274dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown v = super.findViewByPredicateTraversal(predicate, childToSkip); 35284e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v == null) { 35294dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown v = findViewByPredicateInHeadersOrFooters(mHeaderViewInfos, predicate, childToSkip); 35304e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v != null) { 35314e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 35324e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35334e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 35344dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown v = findViewByPredicateInHeadersOrFooters(mFooterViewInfos, predicate, childToSkip); 35354e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v != null) { 35364e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 35374e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35384e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35394e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 35404e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35414e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 35424e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown /* (non-Javadoc) 35434e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * 35444e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * Look in the passed in list of headers or footers for the first view that matches 35454e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown * the predicate. 35464e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown */ 35474e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View findViewByPredicateInHeadersOrFooters(ArrayList<FixedViewInfo> where, 35484dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown Predicate<View> predicate, View childToSkip) { 35494e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (where != null) { 35504e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown int len = where.size(); 35514e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown View v; 35524e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 35534e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown for (int i = 0; i < len; i++) { 35544e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = where.get(i).view; 35554e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 35564dfbec2665bd5f567d7321f2e88a39e1ab45fdf8Jeff Brown if (v != childToSkip && !v.isRootNamespace()) { 35574e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown v = v.findViewByPredicate(predicate); 35584e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 35594e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown if (v != null) { 35604e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return v; 35614e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35624e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35634e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35644e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35654e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown return null; 35664e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown } 35674e6319b73c85082e18d1c532b86336ddd1f8cfaaJeff Brown 35689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3569fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * Returns the set of checked items ids. The result is only valid if the 35708f1bfe1a7cef702fd74e5405443e9fdb7c5e7556Adam Powell * choice mode has not been set to {@link #CHOICE_MODE_NONE}. 3571fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * 3572fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * @return A new array which contains the id of each checked item in the 3573fd3ddfa6f0559eb29eea179690144a7357c34b3dGilles Debunne * list. 35748f1bfe1a7cef702fd74e5405443e9fdb7c5e7556Adam Powell * 3575463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell * @deprecated Use {@link #getCheckedItemIds()} instead. 3576ad28bed52ccabd252149b5297a2d94bacdb388ccRomain Guy */ 35778350f7dbc3a62211b2891f35911e4073d24c4cc5Adam Powell @Deprecated 3578ad28bed52ccabd252149b5297a2d94bacdb388ccRomain Guy public long[] getCheckItemIds() { 3579463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Use new behavior that correctly handles stable ID mapping. 3580463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (mAdapter != null && mAdapter.hasStableIds()) { 3581463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return getCheckedItemIds(); 3582463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3583463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3584463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Old behavior was buggy, but would sort of work for adapters without stable IDs. 3585463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Fall back to it to support legacy apps. 3586463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null && mAdapter != null) { 3587463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final SparseBooleanArray states = mCheckStates; 3588463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final int count = states.size(); 3589463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final long[] ids = new long[count]; 3590463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final ListAdapter adapter = mAdapter; 3591463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3592463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell int checkedCount = 0; 3593463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell for (int i = 0; i < count; i++) { 3594463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (states.valueAt(i)) { 3595463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell ids[checkedCount++] = adapter.getItemId(states.keyAt(i)); 3596463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3597463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3598463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3599463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // Trim array if needed. mCheckStates may contain false values 3600463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell // resulting in checkedCount being smaller than count. 3601463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell if (checkedCount == count) { 3602463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return ids; 3603463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } else { 3604463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell final long[] result = new long[checkedCount]; 3605463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell System.arraycopy(ids, 0, result, 0, checkedCount); 3606463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell 3607463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return result; 3608463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3609463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell } 3610463ceff8a44ec2bf67b0394be7f7e70613a55478Adam Powell return new long[0]; 36118f1bfe1a7cef702fd74e5405443e9fdb7c5e7556Adam Powell } 36129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 3613