19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2008 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.view; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Rect; 20fbf097732137a32930d151f7ba6816a5b870c32aJeff Brownimport android.graphics.Region; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 226e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haaseimport java.util.ArrayList; 23105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Projectimport java.util.concurrent.CopyOnWriteArrayList; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A view tree observer is used to register listeners that can be notified of global 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * changes in the view tree. Such global events include, but are not limited to, 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout of the whole tree, beginning of the drawing pass, touch mode change.... 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A ViewTreeObserver should never be instantiated by applications as it is provided 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * by the views hierarchy. Refer to {@link android.view.View#getViewTreeObserver()} 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * for more information. 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic final class ViewTreeObserver { 35105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project private CopyOnWriteArrayList<OnGlobalFocusChangeListener> mOnGlobalFocusListeners; 36105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project private CopyOnWriteArrayList<OnGlobalLayoutListener> mOnGlobalLayoutListeners; 37105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project private CopyOnWriteArrayList<OnTouchModeChangeListener> mOnTouchModeChangeListeners; 38105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project private CopyOnWriteArrayList<OnComputeInternalInsetsListener> mOnComputeInternalInsetsListeners; 39105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project private CopyOnWriteArrayList<OnScrollChangedListener> mOnScrollChangedListeners; 406e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase private ArrayList<OnPreDrawListener> mOnPreDrawListeners; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mAlive = true; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Interface definition for a callback to be invoked when the focus state within 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the view tree changes. 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public interface OnGlobalFocusChangeListener { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Callback method to be invoked when the focus changes in the view tree. When 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the view tree transitions from touch mode to non-touch mode, oldFocus is null. 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When the view tree transitions from non-touch mode to touch mode, newFocus is 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * null. When focus changes in non-touch mode (without transition from or to 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * touch mode) either oldFocus or newFocus can be null. 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param oldFocus The previously focused view, if any. 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param newFocus The newly focused View, if any. 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onGlobalFocusChanged(View oldFocus, View newFocus); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Interface definition for a callback to be invoked when the global layout state 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or the visibility of views within the view tree changes. 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public interface OnGlobalLayoutListener { 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Callback method to be invoked when the global layout state or the visibility of views 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within the view tree changes 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onGlobalLayout(); 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Interface definition for a callback to be invoked when the view tree is about to be drawn. 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public interface OnPreDrawListener { 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Callback method to be invoked when the view tree is about to be drawn. At this point, all 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * views in the tree have been measured and given a frame. Clients can use this to adjust 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * their scroll bounds or even to request a new layout before drawing occurs. 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Return true to proceed with the current drawing pass, or false to cancel. 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#onMeasure 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#onLayout 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#onDraw 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onPreDraw(); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Interface definition for a callback to be invoked when the touch mode changes. 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public interface OnTouchModeChangeListener { 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Callback method to be invoked when the touch mode changes. 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param isInTouchMode True if the view hierarchy is now in touch mode, false otherwise. 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onTouchModeChanged(boolean isInTouchMode); 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Interface definition for a callback to be invoked when 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * something in the view tree has been scrolled. 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public interface OnScrollChangedListener { 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Callback method to be invoked when something in the view tree 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * has been scrolled. 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onScrollChanged(); 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Parameters used with OnComputeInternalInsetsListener. 118935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * 119935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * We are not yet ready to commit to this API and support it, so 120935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * @hide 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final static class InternalInsetsInfo { 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Offsets from the frame of the window at which the content of 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * windows behind it should be placed. 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final Rect contentInsets = new Rect(); 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 130fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown * Offsets from the frame of the window at which windows behind it 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * are visible. 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final Rect visibleInsets = new Rect(); 134fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown 135fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown /** 136fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown * Touchable region defined relative to the origin of the frame of the window. 137fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown * Only used when {@link #setTouchableInsets(int)} is called with 138fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown * the option {@link #TOUCHABLE_INSETS_REGION}. 139fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown */ 140fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown public final Region touchableRegion = new Region(); 141fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Option for {@link #setTouchableInsets(int)}: the entire window frame 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * can be touched. 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int TOUCHABLE_INSETS_FRAME = 0; 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Option for {@link #setTouchableInsets(int)}: the area inside of 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the content insets can be touched. 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int TOUCHABLE_INSETS_CONTENT = 1; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Option for {@link #setTouchableInsets(int)}: the area inside of 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the visible insets can be touched. 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int TOUCHABLE_INSETS_VISIBLE = 2; 159fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown 160fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown /** 161fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown * Option for {@link #setTouchableInsets(int)}: the area inside of 162fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown * the provided touchable region in {@link #touchableRegion} can be touched. 163fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown */ 164fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown public static final int TOUCHABLE_INSETS_REGION = 3; 165fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set which parts of the window can be touched: either 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #TOUCHABLE_INSETS_FRAME}, {@link #TOUCHABLE_INSETS_CONTENT}, 169fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown * {@link #TOUCHABLE_INSETS_VISIBLE}, or {@link #TOUCHABLE_INSETS_REGION}. 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setTouchableInsets(int val) { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTouchableInsets = val; 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getTouchableInsets() { 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mTouchableInsets; 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mTouchableInsets; 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void reset() { 182fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown contentInsets.setEmpty(); 183fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown visibleInsets.setEmpty(); 184fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown touchableRegion.setEmpty(); 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTouchableInsets = TOUCHABLE_INSETS_FRAME; 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public boolean equals(Object o) { 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (o == null) { 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project InternalInsetsInfo other = (InternalInsetsInfo)o; 194fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown if (mTouchableInsets != other.mTouchableInsets) { 195fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown return false; 196fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown } 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!contentInsets.equals(other.contentInsets)) { 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!visibleInsets.equals(other.visibleInsets)) { 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 203fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown return touchableRegion.equals(other.touchableRegion); 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (ClassCastException e) { 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void set(InternalInsetsInfo other) { 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project contentInsets.set(other.contentInsets); 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project visibleInsets.set(other.visibleInsets); 212fbf097732137a32930d151f7ba6816a5b870c32aJeff Brown touchableRegion.set(other.touchableRegion); 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTouchableInsets = other.mTouchableInsets; 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Interface definition for a callback to be invoked when layout has 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * completed and the client can compute its interior insets. 220935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * 221935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * We are not yet ready to commit to this API and support it, so 222935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * @hide 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public interface OnComputeInternalInsetsListener { 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Callback method to be invoked when layout has completed and the 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * client can compute its interior insets. 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param inoutInfo Should be filled in by the implementation with 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the information about the insets of the window. This is called 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * with whatever values the previous OnComputeInternalInsetsListener 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returned, if there are multiple such listeners in the window. 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onComputeInternalInsets(InternalInsetsInfo inoutInfo); 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new ViewTreeObserver. This constructor should not be called 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewTreeObserver() { 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Merges all the listeners registered on the specified observer with the listeners 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * registered on this object. After this method is invoked, the specified observer 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will return false in {@link #isAlive()} and should not be used anymore. 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param observer The ViewTreeObserver whose listeners must be added to this observer 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void merge(ViewTreeObserver observer) { 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (observer.mOnGlobalFocusListeners != null) { 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnGlobalFocusListeners != null) { 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalFocusListeners.addAll(observer.mOnGlobalFocusListeners); 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalFocusListeners = observer.mOnGlobalFocusListeners; 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (observer.mOnGlobalLayoutListeners != null) { 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnGlobalLayoutListeners != null) { 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalLayoutListeners.addAll(observer.mOnGlobalLayoutListeners); 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalLayoutListeners = observer.mOnGlobalLayoutListeners; 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (observer.mOnPreDrawListeners != null) { 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnPreDrawListeners != null) { 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnPreDrawListeners.addAll(observer.mOnPreDrawListeners); 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnPreDrawListeners = observer.mOnPreDrawListeners; 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (observer.mOnTouchModeChangeListeners != null) { 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnTouchModeChangeListeners != null) { 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnTouchModeChangeListeners.addAll(observer.mOnTouchModeChangeListeners); 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnTouchModeChangeListeners = observer.mOnTouchModeChangeListeners; 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (observer.mOnComputeInternalInsetsListeners != null) { 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnComputeInternalInsetsListeners != null) { 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnComputeInternalInsetsListeners.addAll(observer.mOnComputeInternalInsetsListeners); 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnComputeInternalInsetsListeners = observer.mOnComputeInternalInsetsListeners; 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project observer.kill(); 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Register a callback to be invoked when the focus state within the view tree changes. 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param listener The callback to add 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addOnGlobalFocusChangeListener(OnGlobalFocusChangeListener listener) { 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnGlobalFocusListeners == null) { 305105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnGlobalFocusListeners = new CopyOnWriteArrayList<OnGlobalFocusChangeListener>(); 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalFocusListeners.add(listener); 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remove a previously installed focus change callback. 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param victim The callback to remove 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addOnGlobalFocusChangeListener(OnGlobalFocusChangeListener) 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void removeOnGlobalFocusChangeListener(OnGlobalFocusChangeListener victim) { 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnGlobalFocusListeners == null) { 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalFocusListeners.remove(victim); 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Register a callback to be invoked when the global layout state or the visibility of views 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within the view tree changes 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param listener The callback to add 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addOnGlobalLayoutListener(OnGlobalLayoutListener listener) { 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnGlobalLayoutListeners == null) { 340105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnGlobalLayoutListeners = new CopyOnWriteArrayList<OnGlobalLayoutListener>(); 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalLayoutListeners.add(listener); 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remove a previously installed global layout callback 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param victim The callback to remove 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addOnGlobalLayoutListener(OnGlobalLayoutListener) 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void removeGlobalOnLayoutListener(OnGlobalLayoutListener victim) { 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnGlobalLayoutListeners == null) { 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnGlobalLayoutListeners.remove(victim); 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Register a callback to be invoked when the view tree is about to be drawn 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param listener The callback to add 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addOnPreDrawListener(OnPreDrawListener listener) { 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnPreDrawListeners == null) { 3746e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase mOnPreDrawListeners = new ArrayList<OnPreDrawListener>(); 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnPreDrawListeners.add(listener); 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remove a previously installed pre-draw callback 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param victim The callback to remove 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addOnPreDrawListener(OnPreDrawListener) 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void removeOnPreDrawListener(OnPreDrawListener victim) { 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnPreDrawListeners == null) { 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnPreDrawListeners.remove(victim); 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Register a callback to be invoked when a view has been scrolled. 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param listener The callback to add 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addOnScrollChangedListener(OnScrollChangedListener listener) { 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnScrollChangedListeners == null) { 408105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnScrollChangedListeners = new CopyOnWriteArrayList<OnScrollChangedListener>(); 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnScrollChangedListeners.add(listener); 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remove a previously installed scroll-changed callback 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param victim The callback to remove 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addOnScrollChangedListener(OnScrollChangedListener) 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void removeOnScrollChangedListener(OnScrollChangedListener victim) { 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnScrollChangedListeners == null) { 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnScrollChangedListeners.remove(victim); 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Register a callback to be invoked when the invoked when the touch mode changes. 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param listener The callback to add 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addOnTouchModeChangeListener(OnTouchModeChangeListener listener) { 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnTouchModeChangeListeners == null) { 442105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnTouchModeChangeListeners = new CopyOnWriteArrayList<OnTouchModeChangeListener>(); 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnTouchModeChangeListeners.add(listener); 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remove a previously installed touch mode change callback 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param victim The callback to remove 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addOnTouchModeChangeListener(OnTouchModeChangeListener) 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void removeOnTouchModeChangeListener(OnTouchModeChangeListener victim) { 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnTouchModeChangeListeners == null) { 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnTouchModeChangeListeners.remove(victim); 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Register a callback to be invoked when the invoked when it is time to 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * compute the window's internal insets. 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param listener The callback to add 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 472935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * 473935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * We are not yet ready to commit to this API and support it, so 474935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * @hide 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addOnComputeInternalInsetsListener(OnComputeInternalInsetsListener listener) { 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnComputeInternalInsetsListeners == null) { 480105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnComputeInternalInsetsListeners = 481105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project new CopyOnWriteArrayList<OnComputeInternalInsetsListener>(); 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnComputeInternalInsetsListeners.add(listener); 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remove a previously installed internal insets computation callback 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param victim The callback to remove 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalStateException If {@link #isAlive()} returns false 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see #addOnComputeInternalInsetsListener(OnComputeInternalInsetsListener) 495935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * 496935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * We are not yet ready to commit to this API and support it, so 497935ae463d495d41155e27feb849768ad2b8b16dbDianne Hackborn * @hide 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void removeOnComputeInternalInsetsListener(OnComputeInternalInsetsListener victim) { 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkIsAlive(); 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnComputeInternalInsetsListeners == null) { 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOnComputeInternalInsetsListeners.remove(victim); 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void checkIsAlive() { 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mAlive) { 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("This ViewTreeObserver is not alive, call " 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + "getViewTreeObserver() again"); 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates whether this ViewTreeObserver is alive. When an observer is not alive, 5169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * any call to a method (except this one) will throw an exception. 5179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If an application keeps a long-lived reference to this ViewTreeObserver, it should 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * always check for the result of this method before calling any other method. 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if this object is alive and be used, false otherwise. 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isAlive() { 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mAlive; 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Marks this ViewTreeObserver as not alive. After invoking this method, invoking 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * any other method but {@link #isAlive()} and {@link #kill()} will throw an Exception. 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void kill() { 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAlive = false; 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Notifies registered listeners that focus has changed. 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final void dispatchOnGlobalFocusChange(View oldFocus, View newFocus) { 541105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 542105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // perform the dispatching. The iterator is a safe guard against listeners that 543105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // could mutate the list by calling the various add/remove methods. This prevents 544105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // the array from being modified while we iterate it. 545105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project final CopyOnWriteArrayList<OnGlobalFocusChangeListener> listeners = mOnGlobalFocusListeners; 5466e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase if (listeners != null && listeners.size() > 0) { 547105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project for (OnGlobalFocusChangeListener listener : listeners) { 548105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project listener.onGlobalFocusChanged(oldFocus, newFocus); 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Notifies registered listeners that a global layout happened. This can be called 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manually if you are forcing a layout on a View or a hierarchy of Views that are 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not attached to a Window or in the GONE state. 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void dispatchOnGlobalLayout() { 559105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 560105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // perform the dispatching. The iterator is a safe guard against listeners that 561105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // could mutate the list by calling the various add/remove methods. This prevents 562105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // the array from being modified while we iterate it. 563105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project final CopyOnWriteArrayList<OnGlobalLayoutListener> listeners = mOnGlobalLayoutListeners; 5646e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase if (listeners != null && listeners.size() > 0) { 565105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project for (OnGlobalLayoutListener listener : listeners) { 566105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project listener.onGlobalLayout(); 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Notifies registered listeners that the drawing pass is about to start. If a 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * listener returns true, then the drawing pass is canceled and rescheduled. This can 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be called manually if you are forcing the drawing on a View or a hierarchy of Views 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * that are not attached to a Window or in the GONE state. 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if the current draw should be canceled and resceduled, false otherwise. 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final boolean dispatchOnPreDraw() { 5806e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase // NOTE: we *must* clone the listener list to perform the dispatching. 5816e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase // The clone is a safe guard against listeners that 582105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // could mutate the list by calling the various add/remove methods. This prevents 5836e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase // the array from being modified while we process it. 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean cancelDraw = false; 5856e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase if (mOnPreDrawListeners != null && mOnPreDrawListeners.size() > 0) { 5866e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase final ArrayList<OnPreDrawListener> listeners = 5876e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase (ArrayList<OnPreDrawListener>) mOnPreDrawListeners.clone(); 5886e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase int numListeners = listeners.size(); 5896e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase for (int i = 0; i < numListeners; ++i) { 5906e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase cancelDraw |= !(listeners.get(i).onPreDraw()); 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return cancelDraw; 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Notifies registered listeners that the touch mode has changed. 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param inTouchMode True if the touch mode is now enabled, false otherwise. 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final void dispatchOnTouchModeChanged(boolean inTouchMode) { 602105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project final CopyOnWriteArrayList<OnTouchModeChangeListener> listeners = 603105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnTouchModeChangeListeners; 6046e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase if (listeners != null && listeners.size() > 0) { 605105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project for (OnTouchModeChangeListener listener : listeners) { 606105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project listener.onTouchModeChanged(inTouchMode); 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Notifies registered listeners that something has scrolled. 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final void dispatchOnScrollChanged() { 615105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 616105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // perform the dispatching. The iterator is a safe guard against listeners that 617105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // could mutate the list by calling the various add/remove methods. This prevents 618105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // the array from being modified while we iterate it. 619105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project final CopyOnWriteArrayList<OnScrollChangedListener> listeners = mOnScrollChangedListeners; 6206e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase if (listeners != null && listeners.size() > 0) { 621105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project for (OnScrollChangedListener listener : listeners) { 622105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project listener.onScrollChanged(); 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns whether there are listeners for computing internal insets. 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean hasComputeInternalInsetsListeners() { 631105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project final CopyOnWriteArrayList<OnComputeInternalInsetsListener> listeners = 632105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnComputeInternalInsetsListeners; 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (listeners != null && listeners.size() > 0); 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calls all listeners to compute the current insets. 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final void dispatchOnComputeInternalInsets(InternalInsetsInfo inoutInfo) { 640105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 641105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // perform the dispatching. The iterator is a safe guard against listeners that 642105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // could mutate the list by calling the various add/remove methods. This prevents 643105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project // the array from being modified while we iterate it. 644105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project final CopyOnWriteArrayList<OnComputeInternalInsetsListener> listeners = 645105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project mOnComputeInternalInsetsListeners; 6466e0ecb4eed5cd2e1f15766d7028467129974a12dChet Haase if (listeners != null && listeners.size() > 0) { 647105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project for (OnComputeInternalInsetsListener listener : listeners) { 648105925376f8d0f6b318c9938c7b83ef7fef094daThe Android Open Source Project listener.onComputeInternalInsets(inoutInfo); 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 653