ListView.java revision 2bed22744281a093ee5e76eab531819f3c62b0bf
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 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Canvas; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Rect; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.drawable.Drawable; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.drawable.ColorDrawable; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Parcel; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Parcelable; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.SparseBooleanArray; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.FocusFinder; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.KeyEvent; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.MotionEvent; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewDebug; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.SoundEffectConstants; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport com.google.android.collect.Lists; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport com.android.internal.R; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.ArrayList; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Implementation Notes: 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Some terminology: 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * index - index of the items that are currently visible 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position - index of the items in the cursor 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A view that shows items in a vertically scrolling list. The items 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * come from the {@link ListAdapter} associated with this view. 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_entries 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_divider 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_dividerHeight 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_choiceMode 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_headerDividersEnabled 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ListView_footerDividersEnabled 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ListView extends AbsListView { 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Used to indicate a no preference for a position type. 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final int NO_POSITION = -1; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Normal list that does not indicate choices 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int CHOICE_MODE_NONE = 0; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The list allows up to one choice 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int CHOICE_MODE_SINGLE = 1; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The list allows multiple choices 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int CHOICE_MODE_MULTIPLE = 2; 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When arrow scrolling, ListView will never scroll more than this factor 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * times the height of the list. 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final float MAX_SCROLL_FACTOR = 0.33f; 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When arrow scrolling, need a certain amount of pixels to preview next 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. This is usually the fading edge, but if that is small enough, 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * we want to make sure we preview at least this many pixels. 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int MIN_SCROLL_PREVIEW_PIXELS = 2; 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A class that represents a fixed view in a list, for example a header at the top 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or a footer at the bottom. 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public class FixedViewInfo { 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** The view to add to the list */ 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public View view; 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** The data backing the view. This is returned from {@link ListAdapter#getItem(int)}. */ 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Object data; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** <code>true</code> if the fixed view should be selectable in the list */ 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSelectable; 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrayList<FixedViewInfo> mHeaderViewInfos = Lists.newArrayList(); 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrayList<FixedViewInfo> mFooterViewInfos = Lists.newArrayList(); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Drawable mDivider; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mDividerHeight; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mClipDivider; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mHeaderDividersEnabled; 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mFooterDividersEnabled; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mAreAllItemsSelectable = true; 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mItemsCanFocus = false; 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mChoiceMode = CHOICE_MODE_NONE; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private SparseBooleanArray mCheckStates; 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // used for temporary calculations. 129c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project private final Rect mTempRect = new Rect(); 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // the single allocated result per list view; kinda cheesey but avoids 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // allocating these thingies too often. 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrowScrollFocusResult mArrowScrollFocusResult = new ArrowScrollFocusResult(); 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context) { 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context, AttributeSet attrs) { 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.listViewStyle); 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListView(Context context, AttributeSet attrs, int defStyle) { 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = context.obtainStyledAttributes(attrs, 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView, defStyle, 0); 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project CharSequence[] entries = a.getTextArray( 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView_entries); 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entries != null) { 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setAdapter(new ArrayAdapter<CharSequence>(context, 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.layout.simple_list_item_1, entries)); 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Drawable d = a.getDrawable(com.android.internal.R.styleable.ListView_divider); 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (d != null) { 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If a divider is specified use its intrinsic height for divider height 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDivider(d); 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Use the height specified, zero being the default 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = a.getDimensionPixelSize( 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ListView_dividerHeight, 0); 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dividerHeight != 0) { 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDividerHeight(dividerHeight); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderDividersEnabled = a.getBoolean(R.styleable.ListView_headerDividersEnabled, true); 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterDividersEnabled = a.getBoolean(R.styleable.ListView_footerDividersEnabled, true); 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount a list view will scroll in response to 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mBottom - mTop)); 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Make sure views are touching the top or bottom edge, as appropriate for 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * our gravity 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void adjustViewsUpOrDown() { 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta; 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Uh-oh -- we came up short. Slide all views up to make them 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // align with the top 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = getChildAt(0); 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = child.getTop() - mListPadding.top; 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition != 0) { 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's OK to have some space above the first item if it is 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // part of the vertical spacing 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta -= mDividerHeight; 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta < 0) { 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We only are looking to see if we are too low, not too high 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = 0; 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we are too high, slide all views down to align with bottom 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = getChildAt(childCount - 1); 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = child.getBottom() - (getHeight() - mListPadding.bottom); 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition + childCount < mItemCount) { 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's OK to have some space below the last item if it is 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // part of the vertical spacing 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta += mDividerHeight; 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = 0; 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(-delta); 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the top of the list. If addHeaderView is 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * NOTE: Call this before calling setAdapter. This is so ListView can wrap 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the supplied cursor with one that that will also account for header 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views. 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param data Data to associate with this view 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isSelectable whether the item is selectable 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addHeaderView(View v, Object data, boolean isSelectable) { 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter != null) { 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException( 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Cannot add header view to list -- setAdapter has already been called."); 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FixedViewInfo info = new FixedViewInfo(); 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.view = v; 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.data = data; 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.isSelectable = isSelectable; 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderViewInfos.add(info); 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the top of the list. If addHeaderView is 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * NOTE: Call this before calling setAdapter. This is so ListView can wrap 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the supplied cursor with one that that will also account for header 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views. 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addHeaderView(View v) { 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addHeaderView(v, null, true); 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getHeaderViewsCount() { 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mHeaderViewInfos.size(); 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes a previously-added header view. 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to remove 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the view was removed, false if the view was not a header 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * view 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean removeHeaderView(View v) { 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mHeaderViewInfos.size() > 0) { 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean result = false; 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (((HeaderViewListAdapter) mAdapter).removeHeader(v)) { 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataSetObserver.onChanged(); 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result = true; 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeFixedViewInfo(v, mHeaderViewInfos); 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void removeFixedViewInfo(View v, ArrayList<FixedViewInfo> where) { 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; ++i) { 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FixedViewInfo info = where.get(i); 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (info.view == v) { 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project where.remove(i); 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the bottom of the list. If addFooterView is 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * called more than once, the views will appear in the order they were 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * added. Views added using this call can take focus if they want. 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * NOTE: Call this before calling setAdapter. This is so ListView can wrap 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the supplied cursor with one that that will also account for header 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views. 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param data Data to associate with this view 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isSelectable true if the footer view can be selected 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addFooterView(View v, Object data, boolean isSelectable) { 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FixedViewInfo info = new FixedViewInfo(); 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.view = v; 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.data = data; 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project info.isSelectable = isSelectable; 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterViewInfos.add(info); 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // in the case of re-adding a footer view, or adding one later on, 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we need to notify the observer 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDataSetObserver != null) { 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataSetObserver.onChanged(); 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a fixed view to appear at the bottom of the list. If addFooterView is called more 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * than once, the views will appear in the order they were added. Views added using 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this call can take focus if they want. 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>NOTE: Call this before calling setAdapter. This is so ListView can wrap the supplied 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * cursor with one that that will also account for header views. 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to add. 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addFooterView(View v) { 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addFooterView(v, null, true); 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getFooterViewsCount() { 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFooterViewInfos.size(); 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes a previously-added footer view. 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param v The view to remove 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * true if the view was removed, false if the view was not a footer view 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean removeFooterView(View v) { 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFooterViewInfos.size() > 0) { 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean result = false; 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (((HeaderViewListAdapter) mAdapter).removeFooter(v)) { 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataSetObserver.onChanged(); 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result = true; 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeFixedViewInfo(v, mFooterViewInfos); 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the adapter currently in use in this ListView. The returned adapter 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * might not be the same adapter passed to {@link #setAdapter(ListAdapter)} but 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * might be a {@link WrapperListAdapter}. 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The adapter currently used to display data in this ListView. 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setAdapter(ListAdapter) 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ListAdapter getAdapter() { 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mAdapter; 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the data behind this ListView. 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The adapter passed to this method may be wrapped by a {@link WrapperListAdapter}, 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * depending on the ListView features currently in use. For instance, adding 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * headers and/or footers will cause the adapter to be wrapped. 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param adapter The ListAdapter which is responsible for maintaining the 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * data backing this list and for producing a view to represent an 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * item in that data set. 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #getAdapter() 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setAdapter(ListAdapter adapter) { 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (null != mAdapter) { 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter.unregisterDataSetObserver(mDataSetObserver); 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.clear(); 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mHeaderViewInfos.size() > 0|| mFooterViewInfos.size() > 0) { 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter = new HeaderViewListAdapter(mHeaderViewInfos, mFooterViewInfos, adapter); 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter = adapter; 4149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldSelectedPosition = INVALID_POSITION; 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldSelectedRowId = INVALID_ROW_ID; 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter != null) { 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAreAllItemsSelectable = mAdapter.areAllItemsEnabled(); 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOldItemCount = mItemCount; 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemCount = mAdapter.getCount(); 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkFocus(); 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataSetObserver = new AdapterDataSetObserver(); 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAdapter.registerDataSetObserver(mDataSetObserver); 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.setViewTypeCount(mAdapter.getViewTypeCount()); 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position; 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mStackFromBottom) { 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(mItemCount - 1, false); 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(0, true); 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing selected 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAreAllItemsSelectable = true; 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkFocus(); 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing selected 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCheckStates != null) { 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.clear(); 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The list is empty. Clear everything out. 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void resetList() { 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.resetList(); 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_NORMAL; 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the list needs to show the top fading edge 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean showingTopFadingEdge() { 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mScrollY + mListPadding.top; 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mFirstPosition > 0) || (getChildAt(0).getTop() > listTop); 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the list needs to show the bottom fading edge 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean showingBottomFadingEdge() { 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomOfBottomChild = getChildAt(childCount - 1).getBottom(); 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePosition = mFirstPosition + childCount - 1; 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = mScrollY + getHeight() - mListPadding.bottom; 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (lastVisiblePosition < mItemCount - 1) 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || (bottomOfBottomChild < listBottom); 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) { 4929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int rectTopWithinChild = rect.top; 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset so rect is in coordinates of the this view 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rect.offset(child.getLeft(), child.getTop()); 4979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rect.offset(-child.getScrollX(), -child.getScrollY()); 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int height = getHeight(); 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listUnfadedTop = getScrollY(); 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listUnfadedBottom = listUnfadedTop + height; 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int fadingEdge = getVerticalFadingEdgeLength(); 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (showingTopFadingEdge()) { 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for top fading edge as long as rect isn't at very top 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mSelectedPosition > 0) || (rectTopWithinChild > fadingEdge)) { 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listUnfadedTop += fadingEdge; 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomOfBottomChild = getChildAt(childCount - 1).getBottom(); 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (showingBottomFadingEdge()) { 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for bottom fading edge as long as rect isn't at very bottom 5169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mSelectedPosition < mItemCount - 1) 5179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project || (rect.bottom < (bottomOfBottomChild - fadingEdge))) { 5189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listUnfadedBottom -= fadingEdge; 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollYDelta = 0; 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.bottom > listUnfadedBottom && rect.top > listUnfadedTop) { 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to MOVE DOWN to get it in view: move down just enough so 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 5289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.top - listUnfadedTop); 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at bottom of screen 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.bottom - listUnfadedBottom); 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our children 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToBottom = bottomOfBottomChild - listUnfadedBottom; 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.min(scrollYDelta, distanceToBottom); 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.top < listUnfadedTop && rect.bottom < listUnfadedBottom) { 5419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to MOVE UP to get it in view: move up just enough so that 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (listUnfadedBottom - rect.bottom); 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at top 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (listUnfadedTop - rect.top); 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the top our children 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int top = getChildAt(0).getTop(); 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int deltaToTop = top - listUnfadedTop; 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.max(scrollYDelta, deltaToTop); 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = scrollYDelta != 0; 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 5619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollListItemsBy(-scrollYDelta); 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project positionSelector(child); 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = child.getTop(); 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void fillGap(boolean down) { 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = getChildCount(); 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down) { 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int startOffset = count > 0 ? getChildAt(count - 1).getBottom() + mDividerHeight : 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getListPaddingTop(); 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mFirstPosition + count, startOffset); 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int startOffset = count > 0 ? getChildAt(0).getTop() - mDividerHeight : 5829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getHeight() - getListPaddingBottom(); 5839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mFirstPosition - 1, startOffset); 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 5859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from pos down to the end of the list view. 5909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pos The first position to put in the list 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextTop The location where the top of the item associated with pos 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should be drawn 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected, if it happens to be in the 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * range that we draw. 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillDown(int pos, int nextTop) { 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = null; 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int end = (mBottom - mTop) - mListPadding.bottom; 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (nextTop < end && pos < mItemCount) { 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is this the selected item? 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected = pos == mSelectedPosition; 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = makeAndAddView(pos, nextTop, true, mListPadding.left, selected); 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextTop = child.getBottom() + mDividerHeight; 6109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selected) { 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = child; 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pos++; 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedView; 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from pos up to the top of the list view. 6219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pos The first position to put in the list 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextBottom The location where the bottom of the item associated 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * with pos should be drawn 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillUp(int pos, int nextBottom) { 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = null; 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int end = mListPadding.top; 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (nextBottom > end && pos >= 0) { 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is this the selected item? 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected = pos == mSelectedPosition; 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = makeAndAddView(pos, nextBottom, false, mListPadding.left, selected); 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextBottom = child.getTop() - mDividerHeight; 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selected) { 6409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = child; 6419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pos--; 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = pos + 1; 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedView; 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list from top to bottom, starting with mFirstPosition 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextTop The location where the top of the first item should be 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drawn 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that is currently selected 6579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromTop(int nextTop) { 6599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = Math.min(mFirstPosition, mSelectedPosition); 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = Math.min(mFirstPosition, mItemCount - 1); 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition < 0) { 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = 0; 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return fillDown(mFirstPosition, nextTop); 6659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Put mSelectedPosition in the middle of the screen and then build up and 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down from there. This method forces mSelectedPosition to the center. 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Top of the area in which children can be drawn, as 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * measured in pixels 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Bottom of the area in which children can be drawn, 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * as measured in pixels 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Currently selected view 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromMiddle(int childrenTop, int childrenBottom) { 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = childrenBottom - childrenTop; 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = reconcileSelectedPosition(); 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel = makeAndAddView(position, childrenTop, true, 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, true); 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = position; 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selHeight = sel.getMeasuredHeight(); 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selHeight <= height) { 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom((height - selHeight) / 2); 6909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, position); 6939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 6989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Once the selected view as been placed, fill up the visible area above and 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * below it. 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param sel The selected view 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The position corresponding to sel 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void fillAboveAndBelow(View sel, int position) { 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(position - 1, sel.getTop() - dividerHeight); 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(position + 1, sel.getBottom() + dividerHeight); 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(position + 1, sel.getBottom() + dividerHeight); 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(position - 1, sel.getTop() - dividerHeight); 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the grid based on positioning the new selection at a specific 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * location. The selection may be moved so that it does not intersect the 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * faded edges. The grid is then filled upwards and downwards from there. 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedTop Where the selected item should be 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Where to start drawing children 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Last pixel where children can be drawn 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that currently has selection 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillFromSelection(int selectedTop, int childrenTop, int childrenBottom) { 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdgeLength = getVerticalFadingEdgeLength(); 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedPosition = mSelectedPosition; 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int topSelectionPixel = getTopSelectionPixel(childrenTop, fadingEdgeLength, 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomSelectionPixel = getBottomSelectionPixel(childrenBottom, fadingEdgeLength, 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, selectedTop, true, mListPadding.left, true); 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends below the bottom of the list 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getBottom() > bottomSelectionPixel) { 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available above the selection into which we can scroll 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // upwards 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceAbove = sel.getTop() - topSelectionPixel; 7539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the bottom of the selected item 7559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // fully into view 7569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceBelow = sel.getBottom() - bottomSelectionPixel; 7579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int offset = Math.min(spaceAbove, spaceBelow); 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now offset the selected item to get it into view 7609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(-offset); 7619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (sel.getTop() < topSelectionPixel) { 7629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the top of the selected item fully 7639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // into view 7649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceAbove = topSelectionPixel - sel.getTop(); 7659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available below the selection into which we can scroll 7679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // downwards 7689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int spaceBelow = bottomSelectionPixel - sel.getBottom(); 7699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int offset = Math.min(spaceAbove, spaceBelow); 7709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Offset the selected item to get it into view 7729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(offset); 7739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 7769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 7779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 7799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(getChildCount()); 7809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(getChildCount()); 7829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calculate the bottom-most pixel we can draw the selection into 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Bottom pixel were children can be drawn 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fadingEdgeLength Length of the fading edge in pixels, if present 7929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedPosition The position that will be selected 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The bottom-most pixel we can draw the selection into 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getBottomSelectionPixel(int childrenBottom, int fadingEdgeLength, 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedPosition) { 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomSelectionPixel = childrenBottom; 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedPosition != mItemCount - 1) { 7999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomSelectionPixel -= fadingEdgeLength; 8009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bottomSelectionPixel; 8029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calculate the top-most pixel we can draw the selection into 8069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Top pixel were children can be drawn 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fadingEdgeLength Length of the fading edge in pixels, if present 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedPosition The position that will be selected 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The top-most pixel we can draw the selection into 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getTopSelectionPixel(int childrenTop, int fadingEdgeLength, int selectedPosition) { 8139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first pixel we can draw the selection into 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topSelectionPixel = childrenTop; 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedPosition > 0) { 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topSelectionPixel += fadingEdgeLength; 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return topSelectionPixel; 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fills the list based on positioning the new selection relative to the old 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selection. The new selection will be placed at, above, or below the 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * location of the new selection depending on how the selection is moving. 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The selection will then be pinned to the visible part of the screen, 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * excluding the edges that are faded. The list is then filled upwards and 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * downwards from there. 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param oldSel The old selected view. Useful for trying to put the new 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selection in the same place 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newSel The view that is to become selected. Useful for trying to 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * put the new selection in the same place 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta Which way we are moving 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenTop Where to start drawing children 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenBottom Last pixel where children can be drawn 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The view that currently has selection 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View moveSelection(View oldSel, View newSel, int delta, int childrenTop, 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenBottom) { 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdgeLength = getVerticalFadingEdgeLength(); 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedPosition = mSelectedPosition; 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int topSelectionPixel = getTopSelectionPixel(childrenTop, fadingEdgeLength, 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomSelectionPixel = getBottomSelectionPixel(childrenTop, fadingEdgeLength, 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedPosition); 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 1: Scrolling down. 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Before After 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | A | | A | 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | 1 | => +-------+ 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ | B | 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | B | | 2 | 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Try to keep the top of the previously selected item where it was. 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * oldSel = A 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * sel = B 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Put oldSel (A) where it belongs 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel = makeAndAddView(selectedPosition - 1, oldSel.getTop(), true, 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, false); 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now put the new selection (B) below that 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldSel.getBottom() + dividerHeight, true, 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left, true); 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends below the bottom of the list 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getBottom() > bottomSelectionPixel) { 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available above the selection into which we can scroll upwards 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceAbove = sel.getTop() - topSelectionPixel; 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the bottom of the selected item fully into view 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceBelow = sel.getBottom() - bottomSelectionPixel; 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't scroll more than half the height of the list 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int halfVerticalSpace = (childrenBottom - childrenTop) / 2; 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset = Math.min(spaceAbove, spaceBelow); 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset = Math.min(offset, halfVerticalSpace); 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We placed oldSel, so offset that item 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel.offsetTopAndBottom(-offset); 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Now offset the selected item to get it into view 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(-offset); 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mSelectedPosition - 2, sel.getTop() - dividerHeight); 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mSelectedPosition + 1, sel.getBottom() + dividerHeight); 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(mSelectedPosition + 1, sel.getBottom() + dividerHeight); 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mSelectedPosition - 2, sel.getTop() - dividerHeight); 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (delta < 0) { 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 2: Scrolling up. 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Before After 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | A | | A | 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ => | 1 | 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | B | +-------+ 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | 2 | | B | 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * +-------+ +-------+ 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * | | | | 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Try to keep the top of the item about to become selected where it was. 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * newSel = A 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * olSel = B 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSel != null) { 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Try to position the top of newSel (A) where it was before it was selected 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, newSel.getTop(), true, mListPadding.left, 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project true); 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If (A) was not on screen and so did not have a view, position 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it above the oldSel (B) 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldSel.getTop(), false, mListPadding.left, 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project true); 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Some of the newly selected item extends above the top of the list 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel.getTop() < topSelectionPixel) { 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space required to bring the top of the selected item fully into view 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceAbove = topSelectionPixel - sel.getTop(); 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Find space available below the selection into which we can scroll downwards 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spaceBelow = bottomSelectionPixel - sel.getBottom(); 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't scroll more than half the height of the list 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int halfVerticalSpace = (childrenBottom - childrenTop) / 2; 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset = Math.min(spaceAbove, spaceBelow); 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset = Math.min(offset, halfVerticalSpace); 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Offset the selected item to get it into view 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(offset); 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldTop = oldSel.getTop(); 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Case 3: Staying still 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = makeAndAddView(selectedPosition, oldTop, true, mListPadding.left, true); 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We're staying still... 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (oldTop < childrenTop) { 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... but the top of the old selection was off screen. 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (This can happen if the data changes size out from under us) 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newBottom = sel.getBottom(); 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newBottom < childrenTop + 20) { 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Not enough visible -- bring it onscreen 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetTopAndBottom(childrenTop - sel.getTop()); 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill in views above and below 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillAboveAndBelow(sel, selectedPosition); 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sel; 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Sets up mListPadding 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int widthMode = MeasureSpec.getMode(widthMeasureSpec); 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int heightMode = MeasureSpec.getMode(heightMeasureSpec); 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int widthSize = MeasureSpec.getSize(widthMeasureSpec); 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int heightSize = MeasureSpec.getSize(heightMeasureSpec); 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidth = 0; 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeight = 0; 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemCount = mAdapter == null ? 0 : mAdapter.getCount(); 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && (widthMode == MeasureSpec.UNSPECIFIED || 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightMode == MeasureSpec.UNSPECIFIED)) { 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View child = obtainView(0); 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureScrapChild(child, 0, widthMeasureSpec); 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childWidth = child.getMeasuredWidth(); 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeight = child.getMeasuredHeight(); 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (recycleOnMeasure()) { 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.addScrapView(child); 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (widthMode == MeasureSpec.UNSPECIFIED) { 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project widthSize = mListPadding.left + mListPadding.right + childWidth + 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getVerticalScrollbarWidth(); 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.UNSPECIFIED) { 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightSize = mListPadding.top + mListPadding.bottom + childHeight + 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getVerticalFadingEdgeLength() * 2; 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.AT_MOST) { 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // TODO: after first layout we should maybe start at the first visible position, not 0 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project heightSize = measureHeightOfChildren(widthMeasureSpec, 0, NO_POSITION, heightSize, -1); 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setMeasuredDimension(widthSize, heightSize); 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mWidthMeasureSpec = widthMeasureSpec; 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureScrapChild(View child, int position, int widthMeasureSpec) { 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LayoutParams p = (LayoutParams) child.getLayoutParams(); 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p = new LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT, 0); 10424df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project child.setLayoutParams(p); 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p.viewType = mAdapter.getItemViewType(position); 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(widthMeasureSpec, 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True to recycle the views used to measure this ListView in 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * UNSPECIFIED/AT_MOST modes, false otherwise. 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean recycleOnMeasure() { 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Measures the height of the given range of children (inclusive) and 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returns the height with this ListView's padding and divider heights 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * included. If maxHeight is provided, the measuring will stop when the 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * current height reaches maxHeight. 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param widthMeasureSpec The width measure spec to be given to a child's 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link View#measure(int, int)}. 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param startPosition The position of the first child to be shown. 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param endPosition The (inclusive) position of the last child to be 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * shown. Specify {@link #NO_POSITION} if the last child should be 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the last available child from the adapter. 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param maxHeight The maximum height that will be returned (if all the 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children don't fit in this value, this value will be 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returned). 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param disallowPartialChildPosition In general, whether the returned 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * height should only contain entire children. This is more 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * powerful--it is the first inclusive position at which partial 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children will not be allowed. Example: it looks nice to have 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least 3 completely visible children, and in portrait this 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will most likely fit; but in landscape there could be times 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * when even 2 children can not be completely shown, so a value 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of 2 (remember, inclusive) would be good (assuming 10909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * startPosition is 0). 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The height of this ListView with the given children. 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int measureHeightOfChildren(int widthMeasureSpec, int startPosition, int endPosition, 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxHeight, int disallowPartialChildPosition) { 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = mAdapter; 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter == null) { 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mListPadding.top + mListPadding.bottom; 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Include the padding of the list 11029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int returnedHeight = mListPadding.top + mListPadding.bottom; 11039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = ((mDividerHeight > 0) && mDivider != null) ? mDividerHeight : 0; 11049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The previous height value that was less than maxHeight and contained 11059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no partial children 11069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int prevHeightWithoutPartialChild = 0; 11079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int i; 11089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 11099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // mItemCount - 1 since endPosition parameter is inclusive 11119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endPosition = (endPosition == NO_POSITION) ? adapter.getCount() - 1 : endPosition; 11129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final AbsListView.RecycleBin recycleBin = mRecycler; 11139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean recyle = recycleOnMeasure(); 11149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (i = startPosition; i <= endPosition; ++i) { 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = obtainView(i); 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureScrapChild(child, i, widthMeasureSpec); 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i > 0) { 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Count the divider for all but one child 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project returnedHeight += dividerHeight; 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Recycle the view before we possibly return from the method 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (recyle) { 11279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.addScrapView(child); 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project returnedHeight += child.getMeasuredHeight(); 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (returnedHeight >= maxHeight) { 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We went over, figure out which height to return. If returnedHeight > maxHeight, 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // then the i'th position did not fit completely. 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (disallowPartialChildPosition >= 0) // Disallowing is enabled (> -1) 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (i > disallowPartialChildPosition) // We've past the min pos 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (prevHeightWithoutPartialChild > 0) // We have a prev height 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (returnedHeight != maxHeight) // i'th child did not fit completely 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ? prevHeightWithoutPartialChild 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : maxHeight; 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((disallowPartialChildPosition >= 0) && (i >= disallowPartialChildPosition)) { 11449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevHeightWithoutPartialChild = returnedHeight; 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // At this point, we went through the range of children, and they each 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // completely fit, so return the returnedHeight 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return returnedHeight; 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int findMotionRow(int y) { 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < childCount; i++) { 11589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v = getChildAt(i); 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (y <= v.getBottom()) { 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFirstPosition + i; 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFirstPosition + childCount - 1; 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Put a specific item at a specific location on the screen and then build 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * up and down from there. 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The reference view to use as the starting point 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param top Pixel offset from the top of this view to the top of the 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * reference view. 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The selected view, or null if the selected view is outside the 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible area. 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View fillSpecific(int position, int top) { 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean tempIsSelected = position == mSelectedPosition; 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View temp = makeAndAddView(position, top, true, mListPadding.left, tempIsSelected); 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Possibly changed again in fillUp if we add rows above this one. 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = position; 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View above; 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View below; 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project above = fillUp(position - 1, temp.getTop() - dividerHeight); 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will correct for the top of the first view not touching the top of the list 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project below = fillDown(position + 1, temp.getBottom() + dividerHeight); 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 11969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooHigh(childCount); 11979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project below = fillDown(position + 1, temp.getBottom() + dividerHeight); 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will correct for the bottom of the last view not touching the bottom of the list 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 12029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project above = fillUp(position - 1, temp.getTop() - dividerHeight); 12039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 12049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount > 0) { 12059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project correctTooLow(childCount); 12069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (tempIsSelected) { 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return temp; 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (above != null) { 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return above; 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return below; 12159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Check if we have dragged the bottom of the list too high (we have pushed the 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top element off the top of the screen when we did not need to). Correct by sliding 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * everything back down. 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childCount Number of children 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void correctTooHigh(int childCount) { 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // First see if the last item is visible. If it is not, it is OK for the 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top of the list to be pushed up. 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastPosition = mFirstPosition + childCount - 1; 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastPosition == mItemCount - 1 && childCount > 0) { 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the last child ... 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View lastChild = getChildAt(childCount - 1); 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and its bottom edge 12359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastBottom = lastChild.getBottom(); 12369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is bottom of our drawable area 12389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int end = (mBottom - mTop) - mListPadding.bottom; 12399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is how far the bottom edge of the last view is from the bottom of the 12419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // drawable area 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottomOffset = end - lastBottom; 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View firstChild = getChildAt(0); 12449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstTop = firstChild.getTop(); 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure we are 1) Too high, and 2) Either there are more rows above the 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first row or the first row is scrolled off the top of the drawable area 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bottomOffset > 0 && (mFirstPosition > 0 || firstTop < mListPadding.top)) { 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0) { 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't pull the top too far down 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomOffset = Math.min(bottomOffset, mListPadding.top - firstTop); 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Move everything down 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(bottomOffset); 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition > 0) { 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill the gap that was opened above mFirstPosition with more rows, if 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // possible 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillUp(mFirstPosition - 1, firstChild.getTop() - mDividerHeight); 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Close up the remaining gap 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Check if we have dragged the bottom of the list too low (we have pushed the 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bottom element off the bottom of the screen when we did not need to). Correct by sliding 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * everything back up. 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childCount Number of children 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void correctTooLow(int childCount) { 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // First see if the first item is visible. If it is not, it is OK for the 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // bottom of the list to be pushed down. 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0 && childCount > 0) { 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the first child ... 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View firstChild = getChildAt(0); 12819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and its top edge 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstTop = firstChild.getTop(); 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is top of our drawable area 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int start = mListPadding.top; 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is bottom of our drawable area 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int end = (mBottom - mTop) - mListPadding.bottom; 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is how far the top edge of the first view is from the top of the 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // drawable area 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topOffset = firstTop - start; 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View lastChild = getChildAt(childCount - 1); 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastBottom = lastChild.getBottom(); 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastPosition = mFirstPosition + childCount - 1; 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure we are 1) Too low, and 2) Either there are more rows below the 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // last row or the last row is scrolled off the bottom of the drawable area 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (topOffset > 0 && (lastPosition < mItemCount - 1 || lastBottom > end)) { 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastPosition == mItemCount - 1 ) { 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't pull the bottom too far up 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topOffset = Math.min(topOffset, lastBottom - end); 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Move everything up 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(-topOffset); 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastPosition < mItemCount - 1) { 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fill the gap that was opened below the last position with more rows, if 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // possible 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillDown(lastPosition + 1, lastChild.getBottom() + mDividerHeight); 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Close up the remaining gap 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void layoutChildren() { 13209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean blockLayoutRequests = mBlockLayoutRequests; 13219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!blockLayoutRequests) { 13229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBlockLayoutRequests = true; 13234df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project } else { 13244df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project return; 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.layoutChildren(); 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter == null) { 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenTop = mListPadding.top; 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenBottom = mBottom - mTop - mListPadding.bottom; 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childCount = getChildCount(); 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int index; 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = 0; 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel; 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldSel = null; 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldFirst = null; 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newSel = null; 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusLayoutRestoreView = null; 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember stuff we will need down below 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mLayoutMode) { 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SET_SELECTION: 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = mNextSelectedPosition - mFirstPosition; 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0 && index < childCount) { 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSel = getChildAt(index); 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_TOP: 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_BOTTOM: 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SPECIFIC: 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SYNC: 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_MOVE_SELECTION: 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember the previously selected view 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = mSelectedPosition - mFirstPosition; 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0 && index < childCount) { 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel = getChildAt(index); 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember the previous first child 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldFirst = getChildAt(0); 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNextSelectedPosition >= 0) { 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = mNextSelectedPosition - mSelectedPosition; 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Caution: newSel might be null 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSel = getChildAt(index + delta); 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean dataChanged = mDataChanged; 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dataChanged) { 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleDataChanged(); 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Handle the empty set by removing all views that are visible 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // and calling it a day 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 13949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(mNextSelectedPosition); 13999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pull all children into the RecycleBin. 14019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // These views will be reused if possible 14029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstPosition = mFirstPosition; 14039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final RecycleBin recycleBin = mRecycler; 14049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // reset the focus restoration 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusLayoutRestoreDirectChild = null; 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't put header or footer views into the Recycler. Those are 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // already cached in mHeaderViews; 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dataChanged) { 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < childCount; i++) { 14139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.addScrapView(getChildAt(i)); 14149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ViewDebug.TRACE_RECYCLER) { 14159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewDebug.trace(getChildAt(i), 14169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP, index, i); 14179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.fillActiveViews(childCount, firstPosition); 14219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // take focus back to us temporarily to avoid the eventual 14249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // call to clear focus when removing the focused child below 14259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // from messing things up when ViewRoot assigns focus back 14269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // to someone else 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focusedChild = getFocusedChild(); 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusedChild != null) { 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // TODO: in some cases focusedChild.getParent() == null 14309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we can remember the focused view to restore after relayout if the 14329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // data hasn't changed, or if the focused position is a header or footer 14339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { 14344df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project focusLayoutRestoreDirectChild = focusedChild; 14354df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project // remember the specific view that had focus 14364df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project focusLayoutRestoreView = findFocus(); 14374df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project if (focusLayoutRestoreView != null) { 14384df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project // tell it we are going to mess with it 14394df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project focusLayoutRestoreView.onStartTemporaryDetach(); 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestFocus(); 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear out old views 14469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //removeAllViewsInLayout(); 14479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachAllViewsFromParent(); 14489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mLayoutMode) { 14509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SET_SELECTION: 14519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSel != null) { 14529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromSelection(newSel.getTop(), childrenTop, childrenBottom); 14539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromMiddle(childrenTop, childrenBottom); 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 14579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SYNC: 14589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mSyncPosition, mSpecificTop); 14599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 14609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_BOTTOM: 14619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillUp(mItemCount - 1, childrenBottom); 14629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 14639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 14649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_FORCE_TOP: 14659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = 0; 14669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromTop(childrenTop); 14679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustViewsUpOrDown(); 14689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 14699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_SPECIFIC: 14709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(reconcileSelectedPosition(), mSpecificTop); 14719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 14729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case LAYOUT_MOVE_SELECTION: 14739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = moveSelection(oldSel, newSel, delta, childrenTop, childrenBottom); 14749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 14759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: 14769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childCount == 0) { 14779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 14789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int position = lookForSelectablePosition(0, true); 14799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 14809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillFromTop(childrenTop); 14819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int position = lookForSelectablePosition(mItemCount - 1, false); 14839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(position); 14849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillUp(mItemCount - 1, childrenBottom); 14859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { 14889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mSelectedPosition, 14899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSel == null ? childrenTop : oldSel.getTop()); 14909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (mFirstPosition < mItemCount) { 14919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(mFirstPosition, 14929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldFirst == null ? childrenTop : oldFirst.getTop()); 14939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel = fillSpecific(0, childrenTop); 14959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 14989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Flush any cached views that did not get reused above 15019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleBin.scrapActiveViews(); 15029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sel != null) { 15049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // the current selected item should get focus if items 15059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // are focusable 15069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { 15079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && 15089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); 15099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!focusWasTaken) { 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // selected item didn't take focus, fine, but still want 15119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // to make sure something else outside of the selected view 15129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // has focus 15139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focused = getFocusedChild(); 15149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focused != null) { 15159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focused.clearFocus(); 15169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project positionSelector(sel); 15189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 15199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.setSelected(false); 15209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectorRect.setEmpty(); 15219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 15239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project positionSelector(sel); 15249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = sel.getTop(); 15269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 15279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = 0; 15289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectorRect.setEmpty(); 15299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // even if there is not selected position, we may need to restore 15319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // focus (i.e. something focusable in touch mode) 15329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (hasFocus() && focusLayoutRestoreView != null) { 15339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusLayoutRestoreView.requestFocus(); 15349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // tell focus view we are done mucking with it, if it is still in 15389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // our view hierarchy. 15399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusLayoutRestoreView != null 15409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && focusLayoutRestoreView.getWindowToken() != null) { 15419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusLayoutRestoreView.onFinishTemporaryDetach(); 15429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_NORMAL; 15459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataChanged = false; 15469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNeedSync = false; 15479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(mSelectedPosition); 15489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project updateScrollIndicators(); 15509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0) { 15529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 15539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 15569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 15579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!blockLayoutRequests) { 15589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBlockLayoutRequests = false; 15599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child a direct child of this list. 15659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether child is a header or footer view. 15669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 15679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isDirectChildHeaderOrFooter(View child) { 15689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ArrayList<FixedViewInfo> headers = mHeaderViewInfos; 15709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numHeaders = headers.size(); 15719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numHeaders; i++) { 15729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == headers.get(i).view) { 15739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 15749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ArrayList<FixedViewInfo> footers = mFooterViewInfos; 15779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numFooters = footers.size(); 15789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numFooters; i++) { 15799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == footers.get(i).view) { 15809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 15819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 15849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Obtain the view and add it to our list of children. The view can be made 15889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * fresh, converted from an unused view, or used as is if it was in the 15899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * recycle bin. 15909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 15919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Logical position in the list 15929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y Top or bottom edge of the view to add 15939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flow If flow is true, align top edge to y. If false, align bottom 15949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge to y. 15959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenLeft Left edge where children should be positioned 15969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selected Is this position selected? 15979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return View that was added 15989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 15999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View makeAndAddView(int position, int y, boolean flow, int childrenLeft, 16009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected) { 16019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 16029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mDataChanged) { 16059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Try to use an exsiting view for this position 16069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = mRecycler.getActiveView(position); 16079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 16089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ViewDebug.TRACE_RECYCLER) { 16099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewDebug.trace(child, ViewDebug.RecyclerTraceType.RECYCLE_FROM_ACTIVE_HEAP, 16109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position, getChildCount()); 16119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Found it -- we're using an existing child 16149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This just needs to be positioned 16159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setupChild(child, position, y, flow, childrenLeft, selected, true); 16169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 16189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make a new view for this position, or convert an unused view if possible 16229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = obtainView(position); 16239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This needs to be positioned and measured 16259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setupChild(child, position, y, flow, childrenLeft, selected, false); 16269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 16289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 16319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Add a view as a child and make sure it is measured (if necessary) and 16329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * positioned properly. 16339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 16349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The view to add 16359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The position of this child 16369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The y position relative to which this view will be positioned 16379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flowDown If true, align top edge to y. If false, align bottom 16389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge to y. 16399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childrenLeft Left edge where children should be positioned 16409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selected Is this position selected? 16419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param recycled Has this view been pulled from the recycle bin? If so it 16429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * does not need to be remeasured. 16439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 16449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void setupChild(View child, int position, int y, boolean flowDown, int childrenLeft, 16459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean selected, boolean recycled) { 16469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean isSelected = selected && shouldShowSelector(); 16479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean updateChildSelected = isSelected != child.isSelected(); 16489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean needToMeasure = !recycled || updateChildSelected || child.isLayoutRequested(); 16499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Respect layout params that are already in the view. Otherwise make some up... 16519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // noinspection unchecked 16529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project AbsListView.LayoutParams p = (AbsListView.LayoutParams) child.getLayoutParams(); 16539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 16549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 16559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT, 0); 16569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p.viewType = mAdapter.getItemViewType(position); 16589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1659c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project if (recycled || (p.recycledHeaderFooter && 1660c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER)) { 16619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project attachViewToParent(child, flowDown ? -1 : 0, p); 16629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16634df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project if (p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER) { 16644df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project p.recycledHeaderFooter = true; 16654df2423a947bcd3f024cc3d3a1a315a8dc428598The Android Open Source Project } 16669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addViewInLayout(child, flowDown ? -1 : 0, p, true); 16679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (updateChildSelected) { 16709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setSelected(isSelected); 16719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null) { 16749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child instanceof Checkable) { 16759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ((Checkable) child).setChecked(mCheckStates.get(position)); 16769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToMeasure) { 16809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 16819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 16829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 16839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 16849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 16859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 16869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 16889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 16909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 16919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cleanupLayoutState(child); 16929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int w = child.getMeasuredWidth(); 16959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int h = child.getMeasuredHeight(); 16969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childTop = flowDown ? y : y - h; 16979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToMeasure) { 16999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childRight = childrenLeft + w; 17009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childBottom = childTop + h; 17019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childrenLeft, childTop, childRight, childBottom); 17029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 17039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.offsetLeftAndRight(childrenLeft - child.getLeft()); 17049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.offsetTopAndBottom(childTop - child.getTop()); 17059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCachingStarted && !child.isDrawingCacheEnabled()) { 17089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setDrawingCacheEnabled(true); 17099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 17139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean canAnimate() { 17149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.canAnimate() && mItemCount > 0; 17159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 17189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the currently selected item. If in touch mode, the item will not be selected 17199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * but it will still be positioned appropriately. If the specified selection position 17209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is less than 0, then the item at position 0 will be selected. 17219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 17229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Index (starting at 0) of the data item to be selected. 17239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 17259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelection(int position) { 17269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionFromTop(position, 0); 17279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 17309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the selected item and positions the selection y pixels from the top edge 17319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the ListView. (If in touch mode, the item will not be selected but it will 17329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * still be positioned appropriately.) 17339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 17349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Index (starting at 0) of the data item to be selected. 17359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y The distance from the top edge of the ListView (plus padding) that the 17369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * item will be positioned. 17379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelectionFromTop(int position, int y) { 17399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter == null) { 17409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 17419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!isInTouchMode()) { 17449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = lookForSelectablePosition(position, true); 17459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 17469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 17479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 17499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResurrectToPosition = position; 17509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 17539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SPECIFIC; 17549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpecificTop = mListPadding.top + y; 17559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNeedSync) { 17579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSyncPosition = position; 17589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSyncRowId = mAdapter.getItemId(position); 17599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 17629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 17669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Makes the item at the supplied position selected. 17679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 17689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position the position of the item to select 17699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 17719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void setSelectionInt(int position) { 17729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(position); 17739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layoutChildren(); 17749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 17779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Find a position that can be selected (i.e., is not a separator). 17789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 17799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The starting position to look at. 17809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param lookDown Whether to look down for other positions. 17819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The next selectable position starting at position and then searching either up or 17829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down. Returns {@link #INVALID_POSITION} if nothing can be found. 17839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 17859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lookForSelectablePosition(int position, boolean lookDown) { 17869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = mAdapter; 17879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter == null || isInTouchMode()) { 17889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 17899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 17919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = adapter.getCount(); 17929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mAreAllItemsSelectable) { 17939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lookDown) { 17949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = Math.max(0, position); 17959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (position < count && !adapter.isEnabled(position)) { 17969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position++; 17979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 17999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position = Math.min(position, count - 1); 18009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (position >= 0 && !adapter.isEnabled(position)) { 18019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project position--; 18029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position < 0 || position >= count) { 18069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 18079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return position; 18099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 18109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position < 0 || position >= count) { 18119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 18129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return position; 18149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 18189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * setSelectionAfterHeaderView set the selection to be the first list item 18199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * after the header views. 18209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 18219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSelectionAfterHeaderView() { 18229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = mHeaderViewInfos.size(); 18239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 18249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextSelectedPosition = 0; 18259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 18269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter != null) { 18299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelection(count); 18309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 18319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNextSelectedPosition = count; 18329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SET_SELECTION; 18339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 18389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 18399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Dispatch in the normal way 18409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = super.dispatchKeyEvent(event); 18419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!handled) { 18429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If we didn't handle it... 18439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focused = getFocusedChild(); 18449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focused != null && event.getAction() == KeyEvent.ACTION_DOWN) { 18459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... and our focused child didn't handle it 18469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // ... give it to ourselves so we can scroll if necessary 18479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = onKeyDown(event.getKeyCode(), event); 18489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 18519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 18549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyDown(int keyCode, KeyEvent event) { 18559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, 1, event); 18569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 18599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 18609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, repeatCount, event); 18619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 18649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyUp(int keyCode, KeyEvent event) { 18659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return commonKey(keyCode, 1, event); 18669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean commonKey(int keyCode, int count, KeyEvent event) { 18699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mAdapter == null) { 18709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 18719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDataChanged) { 18749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layoutChildren(); 18759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 18789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int action = event.getAction(); 18799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 18809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (action != KeyEvent.ACTION_UP) { 18819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition < 0) { 18829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 18839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_UP: 18849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_DOWN: 18859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 18869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: 18879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 18889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (resurrectSelection()) { 18899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 18909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 18949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_UP: 18959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 18969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (count > 0) { 18979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(FOCUS_UP); 18989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count--; 18999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(FOCUS_UP); 19029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 19049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_DOWN: 19069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 19079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (count > 0) { 19089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(FOCUS_DOWN); 19099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count--; 19109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(FOCUS_DOWN); 19139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 19159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 19179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = handleHorizontalFocusWithinListItem(View.FOCUS_LEFT); 19189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 19199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 19209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = handleHorizontalFocusWithinListItem(View.FOCUS_RIGHT); 19219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 19229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 19249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: 19259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && event.getRepeatCount() == 0) { 19269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project keyPressed(); 19279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = true; 19299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 19309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 19329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mPopup == null || !mPopup.isShowing()) { 19339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isShiftPressed()) { 19349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pageScroll(FOCUS_DOWN); 19359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pageScroll(FOCUS_UP); 19379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = true; 19399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 19419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!handled) { 19459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = sendToTextFilter(keyCode, count, event); 19469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (handled) { 19499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 19509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 19519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (action) { 19529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.ACTION_DOWN: 19539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyDown(keyCode, event); 19549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.ACTION_UP: 19569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyUp(keyCode, event); 19579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.ACTION_MULTIPLE: 19599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyMultiple(keyCode, count, event); 19609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project default: // shouldn't happen 19629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 19639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 19689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls up or down by the number of items currently present on screen. 19699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 19709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 19719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 19729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 19739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean pageScroll(int direction) { 19749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int nextPage = -1; 19759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean down = false; 19769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == FOCUS_UP) { 19789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextPage = Math.max(0, mSelectedPosition - getChildCount() - 1); 19799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == FOCUS_DOWN) { 19809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextPage = Math.min(mItemCount - 1, mSelectedPosition + getChildCount() - 1); 19819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project down = true; 19829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextPage >= 0) { 19859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = lookForSelectablePosition(nextPage, down); 19869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 19879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_SPECIFIC; 19889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpecificTop = mPaddingTop + getVerticalFadingEdgeLength(); 19899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down && position > mItemCount - getChildCount()) { 19919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_BOTTOM; 19929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!down && position < getChildCount()) { 19959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_TOP; 19969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 19979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 19999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 20009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 20019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 20039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 20079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 20109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Go to the last or first item if possible (not worrying about panning across or navigating 20119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within the internal focus of the currently selected item.) 20129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 20139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 20149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 20159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 20169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 20179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean fullScroll(int direction) { 20189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean moved = false; 20199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == FOCUS_UP) { 20209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition != 0) { 20219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = lookForSelectablePosition(0, true); 20229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 20239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_TOP; 20249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 20259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 20269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project moved = true; 20289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == FOCUS_DOWN) { 20309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition < mItemCount - 1) { 20319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int position = lookForSelectablePosition(mItemCount - 1, true); 20329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (position >= 0) { 20339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLayoutMode = LAYOUT_FORCE_BOTTOM; 20349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionInt(position); 20359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 20369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project moved = true; 20389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (moved) { 20429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 20439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return moved; 20469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 20499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * To avoid horizontal focus searches changing the selected item, we 20509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manually focus search within the selected item (as applicable), and 20519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * prevent focus from jumping to something within another item. 20529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction one of {View.FOCUS_LEFT, View.FOCUS_RIGHT} 20539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether this consumes the key event. 20549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 20559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean handleHorizontalFocusWithinListItem(int direction) { 20569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction != View.FOCUS_LEFT && direction != View.FOCUS_RIGHT) { 20579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("direction must be one of {View.FOCUS_LEFT, View.FOCUS_RIGHT}"); 20589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 20619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && numChildren > 0 && mSelectedPosition != INVALID_POSITION) { 20629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View selectedView = getSelectedView(); 20639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedView.hasFocus() && selectedView instanceof ViewGroup) { 20649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View currentFocus = selectedView.findFocus(); 20659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = FocusFinder.getInstance().findNextFocus( 20669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (ViewGroup) selectedView, 20679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocus, 20689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction); 20699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus != null) { 20709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // do the math to get interesting rect in next focus' coordinates 20719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocus.getFocusedRect(mTempRect); 20729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocus, mTempRect); 20739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetRectIntoDescendantCoords(nextFocus, mTempRect); 20749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus.requestFocus(direction, mTempRect)) { 20759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 20769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we are blocking the key from being handled (by returning true) 20799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the global result is going to be some other view within this 20809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // list. this is to acheive the overall goal of having 20819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // horizontal d-pad navigation remain in the current item. 20829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View globalNextFocus = FocusFinder.getInstance() 20839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project .findNextFocus( 20849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (ViewGroup) getRootView(), 20859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocus, 20869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction); 20879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (globalNextFocus != null) { 20889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return isViewAncestorOf(globalNextFocus, this); 20899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 20939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 20949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 20959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 20969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls to the next or previous item if possible. 20979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 20989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} 20999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 21009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether selection was moved 21019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 21029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean arrowScroll(int direction) { 21039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 21049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = true; 21059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean handled = arrowScrollImpl(direction); 21069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (handled) { 21079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project playSoundEffect(SoundEffectConstants.getContantForFocusDirection(direction)); 21089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 21109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 21119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = false; 21129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 21169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle an arrow scroll going up or down. Take into account whether items are selectable, 21179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether there are focusable items etc. 21189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 21199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction Either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN}. 21209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether any scrolling, selection or focus change occured. 21219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 21229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean arrowScrollImpl(int direction) { 21239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() <= 0) { 21249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 21259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selectedView = getSelectedView(); 21289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); 21309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = amountToScroll(direction, nextSelectedPosition); 21319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if we are moving focus, we may OVERRIDE the default behavior 21339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ArrowScrollFocusResult focusResult = mItemsCanFocus ? arrowScrollFocused(direction) : null; 21349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusResult != null) { 21359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextSelectedPosition = focusResult.getSelectedPosition(); 21369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = focusResult.getAmountToScroll(); 21379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean needToRedraw = focusResult != null; 21409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 21419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); 21429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(nextSelectedPosition); 21439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(nextSelectedPosition); 21449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = getSelectedView(); 21459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && focusResult == null) { 21469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // there was no new view found to take focus, make sure we 21479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // don't leave focus with the old selection 21489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focused = getFocusedChild(); 21499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focused != null) { 21509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focused.clearFocus(); 21519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project needToRedraw = true; 21549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 21559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (amountToScroll > 0) { 21589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollListItemsBy((direction == View.FOCUS_UP) ? amountToScroll : -amountToScroll); 21599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project needToRedraw = true; 21609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if we didn't find a new focusable, make sure any existing focused 21639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item that was panned off screen gives up focus. 21649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && (focusResult == null) 21659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && selectedView != null && selectedView.hasFocus()) { 21669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View focused = selectedView.findFocus(); 21679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (distanceToView(focused) > 0) { 21689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focused.clearFocus(); 21699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the current selection is panned off, we need to remove the selection 21739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition == INVALID_POSITION && selectedView != null 21749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && !isViewAncestorOf(selectedView, this)) { 21759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView = null; 21769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project hideSelector(); 21779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // but we don't want to set the ressurect position (that would make subsequent 21799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // unhandled key events bring back the item we just scrolled off!) 21809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResurrectToPosition = INVALID_POSITION; 21819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (needToRedraw) { 21849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedView != null) { 21859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project positionSelector(selectedView); 21869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedTop = selectedView.getTop(); 21879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 21899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invokeOnItemScrollListener(); 21909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 21919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 21949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 21959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 21969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 21979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When selection changes, it is possible that the previously selected or the 21989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * next selected item will change its size. If so, we need to offset some folks, 21999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and re-layout the items as appropriate. 22009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 22019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param selectedView The currently selected view (before changing selection). 22029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should be <code>null</code> if there was no previous selection. 22039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction Either {@link android.view.View#FOCUS_UP} or 22049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 22059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newSelectedPosition The position of the next selection. 22069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocusAssigned whether new focus was assigned. This matters because 22079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * when something has focus, we don't want to show selection (ugh). 22089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 22099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void handleNewSelectionChange(View selectedView, int direction, int newSelectedPosition, 22109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean newFocusAssigned) { 22119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newSelectedPosition == INVALID_POSITION) { 22129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("newSelectedPosition needs to be valid"); 22139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // whether or not we are moving down or up, we want to preserve the 22169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top of whatever view is on top: 22179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // - moving down: the view that had selection 22189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // - moving up: the view that is getting selection 22199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View topView; 22209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View bottomView; 22219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int topViewIndex, bottomViewIndex; 22229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean topSelected = false; 22239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectedIndex = mSelectedPosition - mFirstPosition; 22249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int nextSelectedIndex = newSelectedPosition - mFirstPosition; 22259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP) { 22269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topViewIndex = nextSelectedIndex; 22279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomViewIndex = selectedIndex; 22289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView = getChildAt(topViewIndex); 22299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView = selectedView; 22309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topSelected = true; 22319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 22329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topViewIndex = selectedIndex; 22339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomViewIndex = nextSelectedIndex; 22349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView = selectedView; 22359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView = getChildAt(bottomViewIndex); 22369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 22399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // start with top view: is it changing size? 22419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (topView != null) { 22429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project topView.setSelected(!newFocusAssigned && topSelected); 22439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureAndAdjustDown(topView, topViewIndex, numChildren); 22449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is the bottom view changing size? 22479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bottomView != null) { 22489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottomView.setSelected(!newFocusAssigned && !topSelected); 22499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureAndAdjustDown(bottomView, bottomViewIndex, numChildren); 22509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 22549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Re-measure a child, and if its height changes, lay it out preserving its 22559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top, and adjust the children below it appropriately. 22569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child 22579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childIndex The view group index of the child. 22589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param numChildren The number of children in the view group. 22599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 22609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureAndAdjustDown(View child, int childIndex, int numChildren) { 22619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldHeight = child.getHeight(); 22629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project measureItem(child); 22639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getMeasuredHeight() != oldHeight) { 22649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // lay out the view, preserving its top 22659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project relayoutMeasuredItem(child); 22669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // adjust views below appropriately 22689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int heightDelta = child.getMeasuredHeight() - oldHeight; 22699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = childIndex + 1; i < numChildren; i++) { 22709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChildAt(i).offsetTopAndBottom(heightDelta); 22719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 22769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Measure a particular list child. 22779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * TODO: unify with setUpChild. 22789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child. 22799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 22809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void measureItem(View child) { 22819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams p = child.getLayoutParams(); 22829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (p == null) { 22839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project p = new ViewGroup.LayoutParams( 22849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.FILL_PARENT, 22859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT); 22869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 22889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 22899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mListPadding.left + mListPadding.right, p.width); 22909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lpHeight = p.height; 22919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec; 22929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lpHeight > 0) { 22939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 22949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 22959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 22969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 22989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 22999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 23019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout a child that has been measured, preserving its top position. 23029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * TODO: unify with setUpChild. 23039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The child. 23049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void relayoutMeasuredItem(View child) { 23069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int w = child.getMeasuredWidth(); 23079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int h = child.getMeasuredHeight(); 23089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childLeft = mListPadding.left; 23099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childRight = childLeft + w; 23109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childTop = child.getTop(); 23119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childBottom = childTop + h; 23129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childLeft, childTop, childRight, childBottom); 23139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 23169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to preview next items when arrow srolling. 23179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getArrowScrollPreviewLength() { 23199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.max(MIN_SCROLL_PREVIEW_PIXELS, getVerticalFadingEdgeLength()); 23209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 23239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine how much we need to scroll in order to get the next selected view 23249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible, with a fading edge showing below as applicable. The amount is 23259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * capped at {@link #getMaxScrollAmount()} . 23269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 23279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 23289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 23299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param nextSelectedPosition The position of the next selection, or 23309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #INVALID_POSITION} if there is no next selectable position 23319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to scroll. Note: this is always positive! Direction 23329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needs to be taken into account when actually scrolling. 23339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 23349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int amountToScroll(int direction, int nextSelectedPosition) { 23359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 23369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top; 23379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 23399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 23419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int indexToMakeVisible = numChildren - 1; 23429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 23439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project indexToMakeVisible = nextSelectedPosition - mFirstPosition; 23449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionToMakeVisible = mFirstPosition + indexToMakeVisible; 23479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View viewToMakeVisible = getChildAt(indexToMakeVisible); 23489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int goalBottom = listBottom; 23509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionToMakeVisible < mItemCount - 1) { 23519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project goalBottom -= getArrowScrollPreviewLength(); 23529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewToMakeVisible.getBottom() <= goalBottom) { 23559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item is fully visible. 23569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 23579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION 23609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (goalBottom - viewToMakeVisible.getTop()) >= getMaxScrollAmount()) { 23619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item already has enough of it visible, changing selection is good enough 23629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 23639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = (viewToMakeVisible.getBottom() - goalBottom); 23669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((mFirstPosition + numChildren) == mItemCount) { 23689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // last is last in list -> make sure we don't scroll past it 23699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int max = getChildAt(numChildren - 1).getBottom() - listBottom; 23709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = Math.min(amountToScroll, max); 23719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.min(amountToScroll, getMaxScrollAmount()); 23749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 23759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int indexToMakeVisible = 0; 23769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION) { 23779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project indexToMakeVisible = nextSelectedPosition - mFirstPosition; 23789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionToMakeVisible = mFirstPosition + indexToMakeVisible; 23809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View viewToMakeVisible = getChildAt(indexToMakeVisible); 23819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int goalTop = listTop; 23829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionToMakeVisible > 0) { 23839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project goalTop += getArrowScrollPreviewLength(); 23849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewToMakeVisible.getTop() >= goalTop) { 23869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item is fully visible. 23879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 23889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextSelectedPosition != INVALID_POSITION && 23919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewToMakeVisible.getBottom() - goalTop) >= getMaxScrollAmount()) { 23929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // item already has enough of it visible, changing selection is good enough 23939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 23949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 23959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 23969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = (goalTop - viewToMakeVisible.getTop()); 23979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFirstPosition == 0) { 23989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // first is first in list -> make sure we don't scroll past it 23999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int max = listTop - getChildAt(0).getTop(); 24009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = Math.min(amountToScroll, max); 24019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Math.min(amountToScroll, getMaxScrollAmount()); 24039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Holds results of focus aware arrow scrolling. 24089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 24099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static private class ArrowScrollFocusResult { 24109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mSelectedPosition; 24119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mAmountToScroll; 24129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * How {@link android.widget.ListView#arrowScrollFocused} returns its values. 24159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 24169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void populate(int selectedPosition, int amountToScroll) { 24179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition = selectedPosition; 24189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAmountToScroll = amountToScroll; 24199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSelectedPosition() { 24229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSelectedPosition; 24239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getAmountToScroll() { 24269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mAmountToScroll; 24279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 24329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 24339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The position of the next selectable position of the views that 24349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * are currently visible, taking into account the fact that there might 24359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be no selection. Returns {@link #INVALID_POSITION} if there is no 24369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selectable view on screen in the given direction. 24379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 24389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int lookForSelectablePositionOnScreen(int direction) { 24399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstPosition = mFirstPosition; 24409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 24419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int startPos = (mSelectedPosition != INVALID_POSITION) ? 24429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition + 1 : 24439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project firstPosition; 24449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos >= mAdapter.getCount()) { 24459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 24469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos < firstPosition) { 24489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startPos = firstPosition; 24499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePos = getLastVisiblePosition(); 24529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = getAdapter(); 24539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int pos = startPos; pos <= lastVisiblePos; pos++) { 24549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter.isEnabled(pos) 24559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) { 24569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return pos; 24579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 24609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int last = firstPosition + getChildCount() - 1; 24619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int startPos = (mSelectedPosition != INVALID_POSITION) ? 24629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedPosition - 1 : 24639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project firstPosition + getChildCount() - 1; 24649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos < 0) { 24659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 24669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (startPos > last) { 24689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startPos = last; 24699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = getAdapter(); 24729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int pos = startPos; pos >= firstPosition; pos--) { 24739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (adapter.isEnabled(pos) 24749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) { 24759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return pos; 24769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 24809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 24819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 24829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 24839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Do an arrow scroll based on focus searching. If a new view is 24849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * given focus, return the selection delta and amount to scroll via 24859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an {@link ArrowScrollFocusResult}, otherwise, return null. 24869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 24879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 24889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 24899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The result if focus has changed, or <code>null</code>. 24909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 24919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrowScrollFocusResult arrowScrollFocused(final int direction) { 24929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View selectedView = getSelectedView(); 24939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocus; 24949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedView != null && selectedView.hasFocus()) { 24959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldFocus = selectedView.findFocus(); 24969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); 24979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 24989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_DOWN) { 24999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean topFadingEdgeShowing = (mFirstPosition > 0); 25009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top + 25019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (topFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); 25029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int ySearchPoint = 25039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (selectedView != null && selectedView.getTop() > listTop) ? 25049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView.getTop() : 25059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listTop; 25069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.set(0, ySearchPoint, 0, ySearchPoint); 25079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 25089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean bottomFadingEdgeShowing = 25099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (mFirstPosition + getChildCount() - 1) < mItemCount; 25109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom - 25119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (bottomFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); 25129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int ySearchPoint = 25139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (selectedView != null && selectedView.getBottom() < listBottom) ? 25149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectedView.getBottom() : 25159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project listBottom; 25169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.set(0, ySearchPoint, 0, ySearchPoint); 25179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); 25199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocus != null) { 25229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int positionOfNewFocus = positionOfNewFocus(newFocus); 25239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // if the focus change is in a different new position, make sure 25259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we aren't jumping over another selectable position 25269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { 25279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int selectablePosition = lookForSelectablePositionOnScreen(direction); 25289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectablePosition != INVALID_POSITION && 25299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ((direction == View.FOCUS_DOWN && selectablePosition < positionOfNewFocus) || 25309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (direction == View.FOCUS_UP && selectablePosition > positionOfNewFocus))) { 25319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 25329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); 25369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxScrollAmount = getMaxScrollAmount(); 25389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusScroll < maxScrollAmount) { 25399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // not moving too far, safe to give next view focus 25409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.requestFocus(direction); 25419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); 25429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mArrowScrollFocusResult; 25439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (distanceToView(newFocus) < maxScrollAmount){ 25449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Case to consider: 25459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // too far to get entire next focusable on screen, but by going 25469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // max scroll amount, we are getting it at least partially in view, 25479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so give it focus and scroll the max ammount. 25489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.requestFocus(direction); 25499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); 25509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mArrowScrollFocusResult; 25519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 25549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocus The view that would have focus. 25589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the position that contains newFocus 25599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int positionOfNewFocus(View newFocus) { 25619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int numChildren = getChildCount(); 25629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numChildren; i++) { 25639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View child = getChildAt(i); 25649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isViewAncestorOf(newFocus, child)) { 25659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFirstPosition + i; 25669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("newFocus is not a child of any of the" 25699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + " children of the list!"); 25709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return true if child is an ancestor of parent, (or equal to the parent). 25749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isViewAncestorOf(View child, View parent) { 25769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 25779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 25789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 25819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewAncestorOf((View) theParent, parent); 25829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 25839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 25849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 25859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine how much we need to scroll in order to get newFocus in view. 25869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction either {@link android.view.View#FOCUS_UP} or 25879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN}. 25889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocus The view that would take focus. 25899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param positionOfNewFocus The position of the list item containing newFocus 25909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The amount to scroll. Note: this is always positive! Direction 25919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * needs to be taken into account when actually scrolling. 25929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 25939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int amountToScrollToNewFocus(int direction, View newFocus, int positionOfNewFocus) { 25949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int amountToScroll = 0; 25959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocus.getDrawingRect(mTempRect); 25969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(newFocus, mTempRect); 25979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP) { 25989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.top < mListPadding.top) { 25999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = mListPadding.top - mTempRect.top; 26009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionOfNewFocus > 0) { 26019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll += getArrowScrollPreviewLength(); 26029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 26059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 26069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.bottom > listBottom) { 26079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll = mTempRect.bottom - listBottom; 26089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (positionOfNewFocus < mItemCount - 1) { 26099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project amountToScroll += getArrowScrollPreviewLength(); 26109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return amountToScroll; 26149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determine the distance to the nearest edge of a view in a particular 26189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * direciton. 26199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param descendant A descendant of this list. 26209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The distance, or 0 if the nearest edge is already on screen. 26219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int distanceToView(View descendant) { 26239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = 0; 26249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 26259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 26269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = mBottom - mTop - mListPadding.bottom; 26279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.bottom < mListPadding.top) { 26289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project distance = mListPadding.top - mTempRect.bottom; 26299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (mTempRect.top > listBottom) { 26309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project distance = mTempRect.top - listBottom; 26319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return distance; 26339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 26379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scroll the children by amount, adding a view at the end and removing 26389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views that fall off as necessary. 26399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 26409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param amount The amount (positive or negative) to scroll. 26419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 26429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollListItemsBy(int amount) { 26439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(amount); 26449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listBottom = getHeight() - mListPadding.bottom; 26469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int listTop = mListPadding.top; 2647c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project final AbsListView.RecycleBin recycleBin = mRecycler; 26489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (amount < 0) { 26509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // shifted items up 26519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may need to pan views into the bottom space 26539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numChildren = getChildCount(); 26549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View last = getChildAt(numChildren - 1); 26559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (last.getBottom() < listBottom) { 26569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int lastVisiblePosition = mFirstPosition + numChildren - 1; 26579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastVisiblePosition < mItemCount - 1) { 26589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project last = addViewBelow(last, lastVisiblePosition); 26599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project numChildren++; 26609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 26619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 26629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may have brought in the last child of the list that is skinnier 26669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // than the fading edge, thereby leaving space at the end. need 26679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // to shift back 26689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (last.getBottom() < listBottom) { 26699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(listBottom - last.getBottom()); 26709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // top views may be panned off screen 26739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View first = getChildAt(0); 26749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (first.getBottom() < listTop) { 2675c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project AbsListView.LayoutParams layoutParams = (LayoutParams) first.getLayoutParams(); 2676c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project if (recycleBin.shouldRecycleViewType(layoutParams.viewType)) { 2677c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project removeViewInLayout(first); 2678c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project recycleBin.addScrapView(first); 2679c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } else { 2680c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project detachViewFromParent(first); 2681c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } 26829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project first = getChildAt(0); 26839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition++; 26849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 26869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // shifted items down 26879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View first = getChildAt(0); 26889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may need to pan views into top 26909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ((first.getTop() > listTop) && (mFirstPosition > 0)) { 26919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project first = addViewAbove(first, mFirstPosition); 26929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition--; 26939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 26949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // may have brought the very first child of the list in too far and 26969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to shift it back 26979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (first.getTop() > listTop) { 26989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenTopAndBottom(listTop - first.getTop()); 26999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int lastIndex = getChildCount() - 1; 27029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View last = getChildAt(lastIndex); 27039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // bottom view may be panned off screen 27059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (last.getTop() > listBottom) { 2706c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project AbsListView.LayoutParams layoutParams = (LayoutParams) last.getLayoutParams(); 2707c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project if (recycleBin.shouldRecycleViewType(layoutParams.viewType)) { 2708c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project removeViewInLayout(last); 2709c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project recycleBin.addScrapView(last); 2710c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } else { 2711c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project detachViewFromParent(last); 2712c39a6e0c51e182338deb8b63d07933b585134929The Android Open Source Project } 27139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project last = getChildAt(--lastIndex); 27149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View addViewAbove(View theView, int position) { 27199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int abovePosition = position - 1; 27209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = obtainView(abovePosition); 27219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int edgeOfNewChild = theView.getTop() - mDividerHeight; 27229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setupChild(view, abovePosition, edgeOfNewChild, false, mListPadding.left, false, false); 27239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view; 27249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View addViewBelow(View theView, int position) { 27279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int belowPosition = position + 1; 27289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = obtainView(belowPosition); 27299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int edgeOfNewChild = theView.getBottom() + mDividerHeight; 27309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setupChild(view, belowPosition, edgeOfNewChild, true, mListPadding.left, false, false); 27319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view; 27329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 27359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates that the views created by the ListAdapter can contain focusable 27369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. 27379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 27389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param itemsCanFocus true if items can get focus, false otherwise 27399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 27409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setItemsCanFocus(boolean itemsCanFocus) { 27419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mItemsCanFocus = itemsCanFocus; 27429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!itemsCanFocus) { 27439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS); 27449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 27489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the views created by the ListAdapter can contain focusable 27499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * items. 27509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 27519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean getItemsCanFocus() { 27529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mItemsCanFocus; 27539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 27569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void dispatchDraw(Canvas canvas) { 27579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the dividers 27589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int dividerHeight = mDividerHeight; 27599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (dividerHeight > 0 && mDivider != null) { 27619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Only modify the top and bottom in the loop, we set the left and right here 27629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Rect bounds = mTempRect; 27639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.left = mPaddingLeft; 27649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.right = mRight - mLeft - mPaddingRight; 27659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int count = getChildCount(); 27679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int headerCount = mHeaderViewInfos.size(); 27689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int footerLimit = mItemCount - mFooterViewInfos.size() - 1; 27699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean headerDividers = mHeaderDividersEnabled; 27709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean footerDividers = mFooterDividersEnabled; 27719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int first = mFirstPosition; 27722bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy final boolean areAllItemsSelectable = mAreAllItemsSelectable; 27732bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy final ListAdapter adapter = mAdapter; 27749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mStackFromBottom) { 27769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bottom; 27779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listBottom = mBottom - mTop - mListPadding.bottom; 27789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 27809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((headerDividers || first + i >= headerCount) && 27819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (footerDividers || first + i < footerLimit)) { 27829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(i); 27839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bottom = child.getBottom(); 27842bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy // Don't draw dividers next to items that are not enabled 27852bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy if (bottom < listBottom && (areAllItemsSelectable || 27862bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy (adapter.isEnabled(first + i) && (i == count - 1 || 27872bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy adapter.isEnabled(first + i + 1))))) { 27889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.top = bottom; 27899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.bottom = bottom + dividerHeight; 27909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project drawDivider(canvas, bounds, i); 27919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 27949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 27959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int top; 27969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int listTop = mListPadding.top; 27979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 27999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((headerDividers || first + i >= headerCount) && 28009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (footerDividers || first + i < footerLimit)) { 28019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(i); 28029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project top = child.getTop(); 28032bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy // Don't draw dividers next to items that are not enabled 28042bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy if (top > listTop && (areAllItemsSelectable || 28052bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy (adapter.isEnabled(first + i) && (i == count - 1 || 28062bed22744281a093ee5e76eab531819f3c62b0bfRomain Guy adapter.isEnabled(first + i + 1))))) { 28079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.top = top - dividerHeight; 28089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bounds.bottom = top; 28099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Give the method the child ABOVE the divider, so we 28109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // subtract one from our child 28119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // position. Give -1 when there is no child above the 28129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // divider. 28139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project drawDivider(canvas, bounds, i - 1); 28149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the indicators (these should be drawn above the dividers) and children 28219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.dispatchDraw(canvas); 28229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Draws a divider for the given child in the given bounds. 28269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 28279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param canvas The canvas to draw to. 28289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bounds The bounds of the divider. 28299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param childIndex The index of child (of the View) above the divider. 28309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This will be -1 if there is no child above the divider to be 28319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drawn. 28329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void drawDivider(Canvas canvas, Rect bounds, int childIndex) { 28349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This widget draws the same divider for all children 28359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Drawable divider = mDivider; 28369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean clipDivider = mClipDivider; 28379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!clipDivider) { 28399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project divider.setBounds(bounds); 28409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 28419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.save(); 28429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.clipRect(bounds); 28439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project divider.draw(canvas); 28469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (clipDivider) { 28489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.restore(); 28499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the drawable that will be drawn between each item in the list. 28549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 28559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the current drawable drawn between list elements 28569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Drawable getDivider() { 28589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDivider; 28599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the drawable that will be drawn between each item in the list. If the drawable does 28639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not have an intrinsic height, you should also call {@link #setDividerHeight(int)} 28649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 28659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param divider The drawable to use. 28669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setDivider(Drawable divider) { 28689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (divider != null) { 28699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = divider.getIntrinsicHeight(); 28709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClipDivider = divider instanceof ColorDrawable; 28719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 28729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = 0; 28739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mClipDivider = false; 28749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDivider = divider; 28769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayoutIfNecessary(); 28779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns the height of the divider that will be drawn between each item in the list. 28819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getDividerHeight() { 28839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDividerHeight; 28849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the height of the divider that will be drawn between each item in the list. Calling 28889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this will override the intrinsic height as set by {@link #setDivider(Drawable)} 28899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 28909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param height The new height of the divider in pixels. 28919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 28929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setDividerHeight(int height) { 28939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDividerHeight = height; 28949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayoutIfNecessary(); 28959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 28979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 28989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Enables or disables the drawing of the divider for header views. 28999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 29009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param headerDividersEnabled True to draw the headers, false otherwise. 29019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 29029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setFooterDividersEnabled(boolean) 29039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addHeaderView(android.view.View) 29049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setHeaderDividersEnabled(boolean headerDividersEnabled) { 29069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mHeaderDividersEnabled = headerDividersEnabled; 29079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 29089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 29119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Enables or disables the drawing of the divider for footer views. 29129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 29139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param footerDividersEnabled True to draw the footers, false otherwise. 29149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 29159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setHeaderDividersEnabled(boolean) 29169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addFooterView(android.view.View) 29179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFooterDividersEnabled(boolean footerDividersEnabled) { 29199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFooterDividersEnabled = footerDividersEnabled; 29209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 29219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 29249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { 29259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 29269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int closetChildIndex = -1; 29289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (gainFocus && previouslyFocusedRect != null) { 29299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect.offset(mScrollX, mScrollY); 29309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // figure out which item should be selected based on previously 29329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // focused rect 29339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect otherRect = mTempRect; 29349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int minDistance = Integer.MAX_VALUE; 29359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childCount = getChildCount(); 29369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int firstPosition = mFirstPosition; 29379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ListAdapter adapter = mAdapter; 29389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < childCount; i++) { 29409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // only consider selectable views 29419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!adapter.isEnabled(firstPosition + i)) { 29429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 29439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View other = getChildAt(i); 29469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project other.getDrawingRect(otherRect); 29479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(other, otherRect); 29489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = getDistance(previouslyFocusedRect, otherRect, direction); 29499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (distance < minDistance) { 29519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project minDistance = distance; 29529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closetChildIndex = i; 29539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (closetChildIndex >= 0) { 29589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelection(closetChildIndex + mFirstPosition); 29599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 29609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 29619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 29669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (non-Javadoc) 29679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 29689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Children specified in XML are assumed to be header views. After we have 29699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * parsed them move them out of the children list and into mHeaderViews. 29709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 29729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFinishInflate() { 29739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFinishInflate(); 29749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 29769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 29779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; ++i) { 29789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addHeaderView(getChildAt(i)); 29799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeAllViews(); 29819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 29849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 29859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#findViewById(int) 29869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * First look in our children, then in any header and footer views that may be scrolled off. 29879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 29889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 29899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected View findViewTraversal(int id) { 29909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 29919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = super.findViewTraversal(id); 29929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v == null) { 29939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewInHeadersOrFooters(mHeaderViewInfos, id); 29949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 29959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 29969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 29979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewInHeadersOrFooters(mFooterViewInfos, id); 29989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 29999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 30009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 30039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 30069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 30079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Look in the passed in list of headers or footers for the view. 30089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 30099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View findViewInHeadersOrFooters(ArrayList<FixedViewInfo> where, int id) { 30109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (where != null) { 30119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 30129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 30139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; i++) { 30159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = where.get(i).view; 30169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!v.isRootNamespace()) { 30189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = v.findViewById(id); 30199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 30219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 30229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 30279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 30309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#findViewWithTag(String) 30319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * First look in our children, then in any header and footer views that may be scrolled off. 30329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 30339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 30349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected View findViewWithTagTraversal(Object tag) { 30359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 30369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = super.findViewWithTagTraversal(tag); 30379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v == null) { 30389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewTagInHeadersOrFooters(mHeaderViewInfos, tag); 30399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 30409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 30419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = findViewTagInHeadersOrFooters(mFooterViewInfos, tag); 30449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 30459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 30469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 30499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* (non-Javadoc) 30529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 30539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Look in the passed in list of headers or footers for the view with the tag. 30549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 30559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View findViewTagInHeadersOrFooters(ArrayList<FixedViewInfo> where, Object tag) { 30569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (where != null) { 30579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = where.size(); 30589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v; 30599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; i++) { 30619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = where.get(i).view; 30629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!v.isRootNamespace()) { 30649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project v = v.findViewWithTag(tag); 30659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (v != null) { 30679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return v; 30689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 30739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 30769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent ev) { 30779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemsCanFocus && ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { 30789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't handle edge touches immediately -- they may actually belong to one of our 30799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // descendants. 30809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 30819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onTouchEvent(ev); 30839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 30869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setChoiceMode(int) 30879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 30889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The current choice mode 30899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 30909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getChoiceMode() { 30919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mChoiceMode; 30929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 30939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 30949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 30959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Defines the choice behavior for the List. By default, Lists do not have any choice behavior 30969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * ({@link #CHOICE_MODE_NONE}). By setting the choiceMode to {@link #CHOICE_MODE_SINGLE}, the 30979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * List allows up to one item to be in a chosen state. By setting the choiceMode to 30989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #CHOICE_MODE_MULTIPLE}, the list allows any number of items to be chosen. 30999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 31009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param choiceMode One of {@link #CHOICE_MODE_NONE}, {@link #CHOICE_MODE_SINGLE}, or 31019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #CHOICE_MODE_MULTIPLE} 31029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 31039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setChoiceMode(int choiceMode) { 31049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChoiceMode = choiceMode; 31059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates == null) { 31069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates = new SparseBooleanArray(); 31079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 31119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean performItemClick(View view, int position, long id) { 31129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 31139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode != CHOICE_MODE_NONE) { 31159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = true; 31169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode == CHOICE_MODE_MULTIPLE) { 31189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean oldValue = mCheckStates.get(position, false); 31199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.put(position, !oldValue); 31209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 31219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean oldValue = mCheckStates.get(position, false); 31229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!oldValue) { 31239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.clear(); 31249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.put(position, true); 31259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataChanged = true; 31299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rememberSyncState(); 31309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 31319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled |= super.performItemClick(view, position, id); 31349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 31369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 31399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the checked state of the specified position. The is only valid if 31409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the choice mode has been set to {@link #CHOICE_MODE_SINGLE} or 31419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #CHOICE_MODE_MULTIPLE}. 31429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 31439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The item whose checked state is to be checked 31449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param value The new checked sate for the item 31459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 31469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setItemChecked(int position, boolean value) { 31479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode == CHOICE_MODE_NONE) { 31489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 31499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode == CHOICE_MODE_MULTIPLE) { 31529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.put(position, value); 31539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 31549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean oldValue = mCheckStates.get(position, false); 31559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.clear(); 31569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!oldValue) { 31579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.put(position, true); 31589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Do not generate a data change while we are in the layout phase 31629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mInLayout && !mBlockLayoutRequests) { 31639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataChanged = true; 31649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rememberSyncState(); 31659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 31669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 31709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the checked state of the specified position. The result is only 31719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * valid if the choice mode has not been set to {@link #CHOICE_MODE_SINGLE} 31729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or {@link #CHOICE_MODE_MULTIPLE}. 31739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 31749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position The item whose checked state to return 31759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The item's checked state 31769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 31779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setChoiceMode(int) 31789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 31799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isItemChecked(int position) { 31809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode != CHOICE_MODE_NONE && mCheckStates != null) { 31819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCheckStates.get(position); 31829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 31859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 31869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 31879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 31889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the currently checked item. The result is only valid if the choice 31899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mode has not been set to {@link #CHOICE_MODE_SINGLE}. 31909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 31919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The position of the currently checked item or 31929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #INVALID_POSITION} if nothing is selected 31939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 31949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #setChoiceMode(int) 31959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 31969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getCheckedItemPosition() { 31979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode == CHOICE_MODE_SINGLE && mCheckStates != null && mCheckStates.size() == 1) { 31989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCheckStates.keyAt(0); 31999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return INVALID_POSITION; 32029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the set of checked items in the list. The result is only valid if 32069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the choice mode has not been set to {@link #CHOICE_MODE_SINGLE}. 32079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 32089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return A SparseBooleanArray which will return true for each call to 32099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * get(int position) where position is a position in the list. 32109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SparseBooleanArray getCheckedItemPositions() { 32129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChoiceMode != CHOICE_MODE_NONE) { 32139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCheckStates; 32149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 32169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Clear any choices previously set 32209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void clearChoices() { 32229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCheckStates != null) { 32239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates.clear(); 32249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static class SavedState extends BaseSavedState { 32289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SparseBooleanArray checkState; 32299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor called from {@link ListView#onSaveInstanceState()} 32329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SavedState(Parcelable superState, SparseBooleanArray checkState) { 32349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(superState); 32359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this.checkState = checkState; 32369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 32399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor called from {@link #CREATOR} 32409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 32419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private SavedState(Parcel in) { 32429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(in); 32439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkState = in.readSparseBooleanArray(); 32449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 32479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void writeToParcel(Parcel out, int flags) { 32489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.writeToParcel(out, flags); 32499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project out.writeSparseBooleanArray(checkState); 32509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 32539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public String toString() { 32549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return "ListView.SavedState{" 32559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + Integer.toHexString(System.identityHashCode(this)) 32569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + " checkState=" + checkState + "}"; 32579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final Parcelable.Creator<SavedState> CREATOR 32609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project = new Parcelable.Creator<SavedState>() { 32619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SavedState createFromParcel(Parcel in) { 32629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new SavedState(in); 32639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SavedState[] newArray(int size) { 32669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new SavedState[size]; 32679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 32699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 32729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Parcelable onSaveInstanceState() { 32739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Parcelable superState = super.onSaveInstanceState(); 32749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new SavedState(superState, mCheckStates); 32759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 32789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onRestoreInstanceState(Parcelable state) { 32799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SavedState ss = (SavedState) state; 32809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onRestoreInstanceState(ss.getSuperState()); 32829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ss.checkState != null) { 32849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCheckStates = ss.checkState; 32859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 32879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 32889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 3289