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 1994a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamyimport android.annotation.NonNull; 2090f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powellimport android.os.Build; 2197e1be8ef6dfd07324c2a1e7d7f59a5658c023bbAlan Viveretteimport android.os.Build.VERSION_CODES; 22d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglioimport android.os.Parcel; 23d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglioimport android.os.Parcelable; 2417dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powellimport com.android.internal.R; 2517dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 28637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Canvas; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Rect; 30a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganovimport android.os.Bundle; 31ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrickimport android.os.StrictMode; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 330dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengrenimport android.util.Log; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.FocusFinder; 3533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brownimport android.view.InputDevice; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.KeyEvent; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.MotionEvent; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.VelocityTracker; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewConfiguration; 412ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.ViewDebug; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 4394a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamyimport android.view.ViewHierarchyEncoder; 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 45a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityEvent; 46a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityNodeInfo; 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.animation.AnimationUtils; 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.List; 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout container for a view hierarchy that can be scrolled by the user, 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * allowing it to be larger than the physical display. A ScrollView 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link FrameLayout}, meaning you should place one child in it 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * containing the entire contents to scroll; this child may itself be a layout 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manager with a complex hierarchy of objects. A child that is often used 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link LinearLayout} in a vertical orientation, presenting a vertical 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * array of top-level items that the user can scroll through. 5915279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * <p>You should never use a ScrollView with a {@link ListView}, because 6015279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * ListView takes care of its own vertical scrolling. Most importantly, doing this 6115279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * defeats all of the important optimizations in ListView for dealing with 6215279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * large lists, since it effectively forces the ListView to display its entire 6315279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * list of items to fill up the infinite container supplied by ScrollView. 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The {@link TextView} class also 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * takes care of its own scrolling, so does not require a ScrollView, but 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * using the two together is possible to achieve the effect of a text view 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within a larger container. 684e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 6915279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * <p>ScrollView only supports vertical scrolling. For horizontal scrolling, 7015279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * use {@link HorizontalScrollView}. 71fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * 72fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#ScrollView_fillViewport 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ScrollView extends FrameLayout { 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final int ANIMATED_SCROLL_GAP = 250; 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final float MAX_SCROLL_FACTOR = 0.5f; 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 790dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren private static final String TAG = "ScrollView"; 800dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long mLastScroll; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final Rect mTempRect = new Rect(); 84637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private OverScroller mScroller; 8589935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect mEdgeGlowTop; 8689935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect mEdgeGlowBottom; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Position of the last motion event. 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 91df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell private int mLastMotionY; 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True when the layout has changed but the traversal has not come through yet. 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Ideally the view hierarchy would keep track of this for us. 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsLayoutDirty = true; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The child to give focus to in the event that a child has requested focus while the 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout is dirty. This prevents the scroll from being wrong if the child has not been 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * laid out before requesting focus. 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mChildToScrollTo = null; 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True if the user is currently dragging this ScrollView around. This is 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not the same as 'is being flinged', which can be checked by 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mScroller.isFinished() (flinging begins when the user lifts his finger). 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsBeingDragged = false; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determines speed during touch scrolling 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private VelocityTracker mVelocityTracker; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When set to true, the scroll view measure its child to make it fill the currently 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible area. 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 122a174d7a0d5475dbae2b48f7359abf1637a882896Romain Guy @ViewDebug.ExportedProperty(category = "layout") 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mFillViewport; 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether arrow scrolling is animated. 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mSmoothScrollingEnabled = true; 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mTouchSlop; 1314296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMinimumVelocity; 1324296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMaximumVelocity; 1334e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 134637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverscrollDistance; 135637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverflingDistance; 136637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 137bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell /** 138bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * ID of the active pointer. This is used to retain consistency during 139bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * drags/flings if multiple pointers are used. 140bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell */ 141bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell private int mActivePointerId = INVALID_POINTER; 142ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 143ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick /** 14410ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell * Used during scrolling to retrieve the new offset within the window. 14510ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell */ 14610ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell private final int[] mScrollOffset = new int[2]; 14710ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell private final int[] mScrollConsumed = new int[2]; 148744beffb6ae76d682c559970bb634722c835a32eAdam Powell private int mNestedYOffset; 14910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell 15010ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell /** 151ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * The StrictMode "critical time span" objects to catch animation 152ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * stutters. Non-null when a time-sensitive animation is 153ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * in-flight. Must call finish() on them when done animating. 154ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * These are no-ops on user builds. 155ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick */ 156ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick private StrictMode.Span mScrollStrictSpan = null; // aka "drag" 157ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick private StrictMode.Span mFlingStrictSpan = null; 158ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 159bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell /** 160bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * Sentinel value for no current active pointer. 161bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * Used by {@link #mActivePointerId}. 162bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell */ 163bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell private static final int INVALID_POINTER = -1; 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 165d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio private SavedState mSavedState; 166d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScrollView(Context context) { 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScrollView(Context context, AttributeSet attrs) { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.scrollViewStyle); 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 175617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette public ScrollView(Context context, AttributeSet attrs, int defStyleAttr) { 176617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette this(context, attrs, defStyleAttr, 0); 177617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette } 178617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette 179617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette public ScrollView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 180617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette super(context, attrs, defStyleAttr, defStyleRes); 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project initScrollView(); 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 183617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette final TypedArray a = context.obtainStyledAttributes( 184617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette attrs, com.android.internal.R.styleable.ScrollView, defStyleAttr, defStyleRes); 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFillViewport(a.getBoolean(R.styleable.ScrollView_fillViewport, false)); 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 192e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy public boolean shouldDelayChildPressedState() { 193e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy return true; 194e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy } 195e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy 196e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy @Override 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getTopFadingEdgeStrength() { 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getVerticalFadingEdgeLength(); 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScrollY < length) { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mScrollY / (float) length; 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getBottomFadingEdgeStrength() { 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getVerticalFadingEdgeLength(); 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomEdge = getHeight() - mPaddingBottom; 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int span = getChildAt(0).getBottom() - mScrollY - bottomEdge; 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (span < length) { 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return span / (float) length; 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount this scroll view will scroll in response to 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mBottom - mTop)); 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void initScrollView() { 236637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller = new OverScroller(getContext()); 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFocusable(true); 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setWillNotDraw(false); 2404296fc4d326447875c26a925f12b3935632f13bbRomain Guy final ViewConfiguration configuration = ViewConfiguration.get(mContext); 2414296fc4d326447875c26a925f12b3935632f13bbRomain Guy mTouchSlop = configuration.getScaledTouchSlop(); 2424296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMinimumVelocity = configuration.getScaledMinimumFlingVelocity(); 2434296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 244637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance = configuration.getScaledOverscrollDistance(); 245637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance = configuration.getScaledOverflingDistance(); 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child) { 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("ScrollView can host only one direct child"); 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child); 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index) { 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("ScrollView can host only one direct child"); 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index); 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, ViewGroup.LayoutParams params) { 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("ScrollView can host only one direct child"); 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, params); 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index, ViewGroup.LayoutParams params) { 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("ScrollView can host only one direct child"); 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index, params); 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns true this ScrollView can be scrolled 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean canScroll() { 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeight = child.getHeight(); 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getHeight() < childHeight + mPaddingTop + mPaddingBottom; 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates whether this ScrollView's content is stretched to fill the viewport. 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if the content fills the viewport, false otherwise. 3004e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 301fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#ScrollView_fillViewport 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isFillViewport() { 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFillViewport; 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates this ScrollView whether it should stretch its content height to fill 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the viewport or not. 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fillViewport True to stretch the content's height to the viewport's 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * boundaries, false otherwise. 3134e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 314fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#ScrollView_fillViewport 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFillViewport(boolean fillViewport) { 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fillViewport != mFillViewport) { 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFillViewport = fillViewport; 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether arrow scrolling will animate its transition. 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSmoothScrollingEnabled() { 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSmoothScrollingEnabled; 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set whether arrow scrolling will animate its transition. 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param smoothScrollingEnabled whether arrow scrolling will animate its transition 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSmoothScrollingEnabled(boolean smoothScrollingEnabled) { 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSmoothScrollingEnabled = smoothScrollingEnabled; 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mFillViewport) { 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.UNSPECIFIED) { 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 351ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 352ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final View child = getChildAt(0); 353115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int widthPadding; 354115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int heightPadding; 355115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 356115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final FrameLayout.LayoutParams lp = (LayoutParams) child.getLayoutParams(); 357115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar if (targetSdkVersion >= VERSION_CODES.M) { 358115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar widthPadding = mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin; 359115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar heightPadding = mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin; 360115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar } else { 361115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar widthPadding = mPaddingLeft + mPaddingRight; 362115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar heightPadding = mPaddingTop + mPaddingBottom; 363115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar } 36497e1be8ef6dfd07324c2a1e7d7f59a5658c023bbAlan Viverette 365115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int desiredHeight = getMeasuredHeight() - heightPadding; 366115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar if (child.getMeasuredHeight() < desiredHeight) { 36797e1be8ef6dfd07324c2a1e7d7f59a5658c023bbAlan Viverette final int childWidthMeasureSpec = getChildMeasureSpec( 36897e1be8ef6dfd07324c2a1e7d7f59a5658c023bbAlan Viverette widthMeasureSpec, widthPadding, lp.width); 36997e1be8ef6dfd07324c2a1e7d7f59a5658c023bbAlan Viverette final int childHeightMeasureSpec = MeasureSpec.makeMeasureSpec( 370115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar desiredHeight, MeasureSpec.EXACTLY); 371ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 372ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Let the focused view and/or our descendants get the key first 3798e618e54ef0f009cac15972af9d9a72d6f6b6f94Romain Guy return super.dispatchKeyEvent(event) || executeKeyEvent(event); 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You can call this function yourself to have the scroll view perform 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling from a key event, just as if the event had been dispatched to 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it by the view hierarchy. 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param event The key event to execute. 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Return true if the event was handled, else false. 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean executeKeyEvent(KeyEvent event) { 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.setEmpty(); 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!canScroll()) { 3942d4cff64b4c864aa5f6859b73ffa65e31ee915acRomain Guy if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) { 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused, View.FOCUS_DOWN); 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocused != null 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && nextFocused != this 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && nextFocused.requestFocus(View.FOCUS_DOWN); 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (event.getAction() == KeyEvent.ACTION_DOWN) { 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (event.getKeyCode()) { 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_UP: 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_UP); 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_UP); 4149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_DOWN: 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_DOWN); 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_DOWN); 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pageScroll(event.isShiftPressed() ? View.FOCUS_UP : View.FOCUS_DOWN); 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4329f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato private boolean inChild(int x, int y) { 4339f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato if (getChildCount() > 0) { 434352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell final int scrollY = mScrollY; 4359f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato final View child = getChildAt(0); 436352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell return !(y < child.getTop() - scrollY 437352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || y >= child.getBottom() - scrollY 4389f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato || x < child.getLeft() 4399f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato || x >= child.getRight()); 4409f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 4419f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato return false; 4429f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 4439f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato 44413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initOrResetVelocityTracker() { 44513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 44613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 44713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } else { 44813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.clear(); 44913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 45013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 45113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 45213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initVelocityTrackerIfNotExists() { 45313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 45413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 45513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 45613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 45713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 45813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void recycleVelocityTracker() { 45913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker != null) { 46013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.recycle(); 46113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = null; 46213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 46313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 46413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 46513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka @Override 46613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) { 46713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (disallowIntercept) { 46813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 46913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 47013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka super.requestDisallowInterceptTouchEvent(disallowIntercept); 47113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 47213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 47313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onInterceptTouchEvent(MotionEvent ev) { 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This method JUST determines whether we want to intercept the motion. 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If we return true, onMotionEvent will be called and we do the actual 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling there. 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Shortcut the most recurring case: the user is in the dragging 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * state and he is moving his finger. We want to intercept this 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * motion. 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((action == MotionEvent.ACTION_MOVE) && (mIsBeingDragged)) { 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 492d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi if (super.onInterceptTouchEvent(ev)) { 493d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi return true; 494d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi } 495d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi 4960278c2fcbae9fccaddd1fca243218a34923417ecAdam Powell /* 4970278c2fcbae9fccaddd1fca243218a34923417ecAdam Powell * Don't try to intercept touch if we can't scroll anyway. 4980278c2fcbae9fccaddd1fca243218a34923417ecAdam Powell */ 4990278c2fcbae9fccaddd1fca243218a34923417ecAdam Powell if (getScrollY() == 0 && !canScrollVertically(1)) { 5000278c2fcbae9fccaddd1fca243218a34923417ecAdam Powell return false; 5010278c2fcbae9fccaddd1fca243218a34923417ecAdam Powell } 5020278c2fcbae9fccaddd1fca243218a34923417ecAdam Powell 503bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell switch (action & MotionEvent.ACTION_MASK) { 504bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_MOVE: { 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether the user has moved far enough from his original down touch. 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Locally do absolute value. mLastMotionY is set to the y value 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the down event. 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5149d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int activePointerId = mActivePointerId; 5159d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell if (activePointerId == INVALID_POINTER) { 5169d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell // If we don't have a valid id, the touch down wasn't on content. 5179d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell break; 5189d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell } 5199d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell 5209d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int pointerIndex = ev.findPointerIndex(activePointerId); 5210dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren if (pointerIndex == -1) { 5220dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren Log.e(TAG, "Invalid pointerId=" + activePointerId 5230dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren + " in onInterceptTouchEvent"); 5240dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren break; 5250dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren } 5260dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren 527df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int y = (int) ev.getY(pointerIndex); 528df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int yDiff = Math.abs(y - mLastMotionY); 52910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell if (yDiff > mTouchSlop && (getNestedScrollAxes() & SCROLL_AXIS_VERTICAL) == 0) { 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = true; 531f7b4accbda1a4d98a5fadbf3984cb9666a4fe9e9Romain Guy mLastMotionY = y; 53213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 53313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 534744beffb6ae76d682c559970bb634722c835a32eAdam Powell mNestedYOffset = 0; 535ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mScrollStrictSpan == null) { 536ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = StrictMode.enterCriticalSpan("ScrollView-scroll"); 537ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 538b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 539b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 540b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 541b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 544bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 546bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_DOWN: { 547df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int y = (int) ev.getY(); 5484cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (!inChild((int) ev.getX(), (int) y)) { 5499f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato mIsBeingDragged = false; 55013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 5519f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato break; 5529f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 5539f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato 554bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell /* 555bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * Remember location of down touch. 556bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * ACTION_DOWN always refers to pointer index 0. 557bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell */ 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastMotionY = y; 559bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = ev.getPointerId(0); 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 56113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initOrResetVelocityTracker(); 56213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 564f2a7e9712f20bdb9563aee681b861569a6372ea4Chris Banes * If being flinged and user touches the screen, initiate drag; 565f2a7e9712f20bdb9563aee681b861569a6372ea4Chris Banes * otherwise don't. mScroller.isFinished should be false when 566f2a7e9712f20bdb9563aee681b861569a6372ea4Chris Banes * being flinged. We need to call computeScrollOffset() first so that 567f2a7e9712f20bdb9563aee681b861569a6372ea4Chris Banes * isFinished() is correct. 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 569f2a7e9712f20bdb9563aee681b861569a6372ea4Chris Banes mScroller.computeScrollOffset(); 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = !mScroller.isFinished(); 571ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mIsBeingDragged && mScrollStrictSpan == null) { 572ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = StrictMode.enterCriticalSpan("ScrollView-scroll"); 573ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 574e9a16a5a3e7e41551e8c95b84d0e2af0dd130afeAdam Powell startNestedScroll(SCROLL_AXIS_VERTICAL); 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 576bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_CANCEL: 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Release the drag */ 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = false; 582bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = INVALID_POINTER; 58313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 584637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange())) { 585df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 586637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 587e9a16a5a3e7e41551e8c95b84d0e2af0dd130afeAdam Powell stopNestedScroll(); 588bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 589bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_POINTER_UP: 590bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell onSecondaryPointerUp(ev); 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The only time we want to intercept motion events is if we are in the 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drag mode. 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mIsBeingDragged; 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent ev) { 60313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 60496d62aff0f97557bc15de98e145d9345288d060cAdam Powell 60596d62aff0f97557bc15de98e145d9345288d060cAdam Powell MotionEvent vtev = MotionEvent.obtain(ev); 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 607744beffb6ae76d682c559970bb634722c835a32eAdam Powell final int actionMasked = ev.getActionMasked(); 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 609744beffb6ae76d682c559970bb634722c835a32eAdam Powell if (actionMasked == MotionEvent.ACTION_DOWN) { 610744beffb6ae76d682c559970bb634722c835a32eAdam Powell mNestedYOffset = 0; 611744beffb6ae76d682c559970bb634722c835a32eAdam Powell } 612744beffb6ae76d682c559970bb634722c835a32eAdam Powell vtev.offsetLocation(0, mNestedYOffset); 613744beffb6ae76d682c559970bb634722c835a32eAdam Powell 614744beffb6ae76d682c559970bb634722c835a32eAdam Powell switch (actionMasked) { 615bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_DOWN: { 616b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (getChildCount() == 0) { 617fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown return false; 618fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown } 619b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if ((mIsBeingDragged = !mScroller.isFinished())) { 620b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 621b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 622b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 623b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 624b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 6254e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 626352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell /* 627352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * If being flinged and user touches, stop the fling. isFinished 628352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * will be false if being flinged. 629352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell */ 630352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (!mScroller.isFinished()) { 631352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mScroller.abortAnimation(); 632ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 633ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 634ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 635ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 636352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 637352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember where the motion event started 639df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(); 640bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = ev.getPointerId(0); 64110ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell startNestedScroll(SCROLL_AXIS_VERTICAL); 6429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 643bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_MOVE: 645b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int activePointerIndex = ev.findPointerIndex(mActivePointerId); 6460dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren if (activePointerIndex == -1) { 6470dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren Log.e(TAG, "Invalid pointerId=" + mActivePointerId + " in onTouchEvent"); 6480dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren break; 6490dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren } 6500dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren 651b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int y = (int) ev.getY(activePointerIndex); 652b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell int deltaY = mLastMotionY - y; 65310ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell if (dispatchNestedPreScroll(0, deltaY, mScrollConsumed, mScrollOffset)) { 654e9a0d6a859961bf97e9e7a0d06b2c47c7516e9b7Yorke Lee deltaY -= mScrollConsumed[1]; 65596d62aff0f97557bc15de98e145d9345288d060cAdam Powell vtev.offsetLocation(0, mScrollOffset[1]); 656744beffb6ae76d682c559970bb634722c835a32eAdam Powell mNestedYOffset += mScrollOffset[1]; 65710ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } 658b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (!mIsBeingDragged && Math.abs(deltaY) > mTouchSlop) { 659b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 660b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 661b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 662b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 663b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell mIsBeingDragged = true; 664b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (deltaY > 0) { 665b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaY -= mTouchSlop; 666b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } else { 667b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaY += mTouchSlop; 668b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 669b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 6709f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato if (mIsBeingDragged) { 6719f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato // Scroll to follow the motion event 672e9a0d6a859961bf97e9e7a0d06b2c47c7516e9b7Yorke Lee mLastMotionY = y - mScrollOffset[1]; 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 674637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldY = mScrollY; 675637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int range = getScrollRange(); 676e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 67710ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 678e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 679e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 680cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette // Calling overScrollBy will call onOverScrolled, which 681cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette // calls onScrollChanged if applicable. 68210ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell if (overScrollBy(0, deltaY, 0, mScrollY, 0, range, 0, mOverscrollDistance, true) 68310ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell && !hasNestedScrollingParent()) { 684637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Break our velocity if we hit a scroll barrier. 685637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mVelocityTracker.clear(); 686637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 687637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 68810ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell final int scrolledDeltaY = mScrollY - oldY; 68910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell final int unconsumedY = deltaY - scrolledDeltaY; 69010ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell if (dispatchNestedScroll(0, scrolledDeltaY, 0, unconsumedY, mScrollOffset)) { 69110ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell mLastMotionY -= mScrollOffset[1]; 69296d62aff0f97557bc15de98e145d9345288d060cAdam Powell vtev.offsetLocation(0, mScrollOffset[1]); 693744beffb6ae76d682c559970bb634722c835a32eAdam Powell mNestedYOffset += mScrollOffset[1]; 69410ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } else if (canOverscroll) { 695637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int pulledToY = oldY + deltaY; 696637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (pulledToY < 0) { 697c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell mEdgeGlowTop.onPull((float) deltaY / getHeight(), 698c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell ev.getX(activePointerIndex) / getWidth()); 699637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowBottom.isFinished()) { 700637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowBottom.onRelease(); 701637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 702637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (pulledToY > range) { 703c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell mEdgeGlowBottom.onPull((float) deltaY / getHeight(), 704c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell 1.f - ev.getX(activePointerIndex) / getWidth()); 705637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowTop.isFinished()) { 706637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowTop.onRelease(); 707637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 708637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 709637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop != null 710637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell && (!mEdgeGlowTop.isFinished() || !mEdgeGlowBottom.isFinished())) { 711df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 712637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 713637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 7149f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 715bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 7164e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira case MotionEvent.ACTION_UP: 7179f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato if (mIsBeingDragged) { 7189f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato final VelocityTracker velocityTracker = mVelocityTracker; 7199f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 720bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell int initialVelocity = (int) velocityTracker.getYVelocity(mActivePointerId); 7219f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato 72210ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell if ((Math.abs(initialVelocity) > mMinimumVelocity)) { 72310ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell flingWithNestedDispatch(-initialVelocity); 72410ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } else if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, 72510ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell getScrollRange())) { 72610ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell postInvalidateOnAnimation(); 72717dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell } 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 729bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = INVALID_POINTER; 730ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick endDrag(); 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 732bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 733352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell case MotionEvent.ACTION_CANCEL: 734352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (mIsBeingDragged && getChildCount() > 0) { 735637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange())) { 736df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 737637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 738352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = INVALID_POINTER; 739ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick endDrag(); 740352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 741352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell break; 7429bc30d31322848d61f518c1db43544988faaba8fAdam Powell case MotionEvent.ACTION_POINTER_DOWN: { 7439bc30d31322848d61f518c1db43544988faaba8fAdam Powell final int index = ev.getActionIndex(); 744df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(index); 7459bc30d31322848d61f518c1db43544988faaba8fAdam Powell mActivePointerId = ev.getPointerId(index); 7469bc30d31322848d61f518c1db43544988faaba8fAdam Powell break; 7479bc30d31322848d61f518c1db43544988faaba8fAdam Powell } 748bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_POINTER_UP: 749bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell onSecondaryPointerUp(ev); 750df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(ev.findPointerIndex(mActivePointerId)); 751bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 75396d62aff0f97557bc15de98e145d9345288d060cAdam Powell 75496d62aff0f97557bc15de98e145d9345288d060cAdam Powell if (mVelocityTracker != null) { 75596d62aff0f97557bc15de98e145d9345288d060cAdam Powell mVelocityTracker.addMovement(vtev); 75696d62aff0f97557bc15de98e145d9345288d060cAdam Powell } 75796d62aff0f97557bc15de98e145d9345288d060cAdam Powell vtev.recycle(); 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7604e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 761bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell private void onSecondaryPointerUp(MotionEvent ev) { 762bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 763bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell MotionEvent.ACTION_POINTER_INDEX_SHIFT; 764bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell final int pointerId = ev.getPointerId(pointerIndex); 765bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell if (pointerId == mActivePointerId) { 766bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell // This was our active pointer going up. Choose a new 767bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell // active pointer and adjust accordingly. 768bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell // TODO: Make this decision more intelligent. 769bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 770df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(newPointerIndex); 771bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = ev.getPointerId(newPointerIndex); 772bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell if (mVelocityTracker != null) { 773bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mVelocityTracker.clear(); 774bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 775bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 776bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 7774e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 778637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 77933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown public boolean onGenericMotionEvent(MotionEvent event) { 78033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { 78133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown switch (event.getAction()) { 78233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown case MotionEvent.ACTION_SCROLL: { 78333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (!mIsBeingDragged) { 78433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final float vscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL); 78533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (vscroll != 0) { 78633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final int delta = (int) (vscroll * getVerticalScrollFactor()); 78733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final int range = getScrollRange(); 78833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown int oldScrollY = mScrollY; 78933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown int newScrollY = oldScrollY - delta; 79033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (newScrollY < 0) { 79133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown newScrollY = 0; 79233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } else if (newScrollY > range) { 79333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown newScrollY = range; 79433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 79533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (newScrollY != oldScrollY) { 79633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown super.scrollTo(mScrollX, newScrollY); 79733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown return true; 79833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 79933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 80033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 80133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 80233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 80333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 80433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown return super.onGenericMotionEvent(event); 80533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 80633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown 80733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown @Override 808637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell protected void onOverScrolled(int scrollX, int scrollY, 809637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell boolean clampedX, boolean clampedY) { 810637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Treat animating scrolls differently; see #computeScroll() for why. 811637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mScroller.isFinished()) { 812cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette final int oldX = mScrollX; 813cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette final int oldY = mScrollY; 814637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollX = scrollX; 815637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollY = scrollY; 8160fd89bf7221431260883cee4597e2db942d799a0Romain Guy invalidateParentIfNeeded(); 817cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette onScrollChanged(mScrollX, mScrollY, oldX, oldY); 818637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (clampedY) { 819637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange()); 820637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 821637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 822637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.scrollTo(scrollX, scrollY); 823637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 824e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy 825e72cf7341a608402309ce894fc12d050cc7c0e14Romain Guy awakenScrollBars(); 826637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 827637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 828a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette /** @hide */ 829a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 830a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette public boolean performAccessibilityActionInternal(int action, Bundle arguments) { 831a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette if (super.performAccessibilityActionInternal(action, arguments)) { 83248d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return true; 83348d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 834fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (!isEnabled()) { 835fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov return false; 836fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 837a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov switch (action) { 838ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: 839ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case R.id.accessibilityActionScrollDown: { 840a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportHeight = getHeight() - mPaddingBottom - mPaddingTop; 841a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollY = Math.min(mScrollY + viewportHeight, getScrollRange()); 842a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollY != mScrollY) { 843a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(0, targetScrollY); 844a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 845a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 846a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 847ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: 848ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case R.id.accessibilityActionScrollUp: { 849a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportHeight = getHeight() - mPaddingBottom - mPaddingTop; 850a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollY = Math.max(mScrollY - viewportHeight, 0); 851a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollY != mScrollY) { 852a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(0, targetScrollY); 853a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 854a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 855a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 856a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 85748d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return false; 858a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 859a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov 860a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn @Override 861a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn public CharSequence getAccessibilityClassName() { 862a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn return ScrollView.class.getName(); 863a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn } 864a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn 865a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette /** @hide */ 866a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov @Override 867a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 868a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette super.onInitializeAccessibilityNodeInfoInternal(info); 869fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled()) { 870fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov final int scrollRange = getScrollRange(); 871fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (scrollRange > 0) { 872fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov info.setScrollable(true); 873fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (mScrollY > 0) { 874ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction( 875ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_BACKWARD); 876ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_UP); 877fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 878fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (mScrollY < scrollRange) { 879ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_FORWARD); 880ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_DOWN); 881fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 882a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 883a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 884a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 885a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 886a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette /** @hide */ 887a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 888a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 889a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette super.onInitializeAccessibilityEventInternal(event); 890d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov final boolean scrollable = getScrollRange() > 0; 891d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollable(scrollable); 892d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollX(mScrollX); 893d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollY(mScrollY); 894d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollX(mScrollX); 895d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollY(getScrollRange()); 896a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 897a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 898637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int getScrollRange() { 899637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int scrollRange = 0; 900637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (getChildCount() > 0) { 901637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell View child = getChildAt(0); 902637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange = Math.max(0, 903637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell child.getHeight() - (getHeight() - mPaddingBottom - mPaddingTop)); 904637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 905637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return scrollRange; 906637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 907637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in the specified bounds. 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param topFocus look for a candidate is the one at the top of the bounds 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if topFocus is true, or at the bottom of the bounds if topFocus is 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * false 9169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param top the top offset of the bounds in which a focusable must be 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bottom the bottom offset of the bounds in which a focusable must 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInBounds(boolean topFocus, int top, int bottom) { 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project List<View> focusables = getFocusables(View.FOCUS_FORWARD); 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusCandidate = null; 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A fully contained focusable is one where its top is below the bound's 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top, and its bottom is above the bound's bottom. A partially 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained focusable is one where some part of it is within the 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds, but it also has some part that is not within bounds. A fully contained 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusable is preferred to a partially contained focusable. 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean foundFullyContainedFocusable = false; 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = focusables.size(); 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = focusables.get(i); 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewTop = view.getTop(); 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewBottom = view.getBottom(); 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (top < viewBottom && viewTop < bottom) { 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the focusable is in the target area, it is a candidate for 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusing 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsFullyContained = (top < viewTop) && 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewBottom < bottom); 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusCandidate == null) { 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* No candidate, take this one */ 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = viewIsFullyContained; 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsCloserToBoundary = 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (topFocus && viewTop < focusCandidate.getTop()) || 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (!topFocus && viewBottom > focusCandidate 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project .getBottom()); 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (foundFullyContainedFocusable) { 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained && viewIsCloserToBoundary) { 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We're dealing with only fully contained views, so 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it has to be closer to the boundary to beat our 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * candidate 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained) { 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Any fully contained view beats a partially contained view */ 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = true; 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (viewIsCloserToBoundary) { 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Partially contained view beats another partially 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained view if it's closer 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return focusCandidate; 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "page up/down" shortcut press. This 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view by one page up or down and give the focus 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the topmost/bottommost component in the new visible area. If no 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_UP} 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page up or 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN} to go one page down 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean pageScroll(int direction) { 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean down = direction == View.FOCUS_DOWN; 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down) { 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = getScrollY() + height; 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = getChildAt(count - 1); 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.top + height > view.getBottom()) { 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = view.getBottom() - height; 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = getScrollY() - height; 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.top < 0) { 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = 0; 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.bottom = mTempRect.top + height; 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.top, mTempRect.bottom); 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "home/end" shortcut press. This 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view to the top or bottom and give the focus 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the topmost/bottommost component in the new visible area. If no 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_UP} 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the top of the view or 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN} to go the bottom 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean fullScroll(int direction) { 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean down = direction == View.FOCUS_DOWN; 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = 0; 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.bottom = height; 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down) { 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = getChildAt(count - 1); 10505435a06010fb50dd8b495df6b7f21f15d82a2c0aMattias Petersson mTempRect.bottom = view.getBottom() + mPaddingBottom; 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = mTempRect.bottom - height; 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.top, mTempRect.bottom); 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Scrolls the view to make the area defined by <code>top</code> and 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <code>bottom</code> visible. This method attempts to give the focus 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to a component visible in this area. If no component can be focused in 10622ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne * the new visible area, the focus is reclaimed by this ScrollView.</p> 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_UP} 10652ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne * to go upward, {@link android.view.View#FOCUS_DOWN} to downward 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param top the top offset of the new area to be made visible 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bottom the bottom offset of the new area to be made visible 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollAndFocus(int direction, int top, int bottom) { 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = true; 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerTop = getScrollY(); 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerBottom = containerTop + height; 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean up = direction == View.FOCUS_UP; 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocused = findFocusableViewInBounds(up, top, bottom); 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocused == null) { 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocused = this; 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (top >= containerTop && bottom <= containerBottom) { 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = false; 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = up ? (top - containerTop) : (bottom - containerBottom); 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(delta); 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10902ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != findFocus()) newFocused.requestFocus(direction); 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle scrolling in response to an up or down arrow click. 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction The direction corresponding to the arrow key that was 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pressed 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if we consumed the event, false otherwise 11019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean arrowScroll(int direction) { 11039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 11059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 11069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, direction); 11089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = getMaxScrollAmount(); 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11117d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra if (nextFocused != null && isWithinDeltaOfScreen(nextFocused, maxJump, getHeight())) { 11129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.getDrawingRect(mTempRect); 11139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(nextFocused, mTempRect); 11149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(scrollDelta); 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(direction); 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no new focus 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = maxJump; 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP && getScrollY() < scrollDelta) { 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = getScrollY(); 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == View.FOCUS_DOWN) { 1124ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 1125ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int daBottom = getChildAt(0).getBottom(); 11265435a06010fb50dd8b495df6b7f21f15d82a2c0aMattias Petersson int screenBottom = getScrollY() + getHeight() - mPaddingBottom; 1127ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (daBottom - screenBottom < maxJump) { 1128ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy scrollDelta = daBottom - screenBottom; 1129ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta == 0) { 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(direction == View.FOCUS_DOWN ? scrollDelta : -scrollDelta); 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused != null && currentFocused.isFocused() 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && isOffScreen(currentFocused)) { 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // previously focused item still has focus and is off screen, give 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it up (take it back to ourselves) 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (also, need to temporarily force FOCUS_BEFORE_DESCENDANTS so we are 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // sure to 11449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get it) 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int descendantFocusability = getDescendantFocusability(); // save 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS); 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestFocus(); 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(descendantFocusability); // restore 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is scrolled off 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * screen. 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isOffScreen(View descendant) { 11587d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra return !isWithinDeltaOfScreen(descendant, 0, getHeight()); 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is within delta 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixels of being on the screen. 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11657d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra private boolean isWithinDeltaOfScreen(View descendant, int delta, int height) { 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mTempRect.bottom + delta) >= getScrollY() 11707d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra && (mTempRect.top - delta) <= (getScrollY() + height); 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Smooth scroll by a Y delta 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta the number of pixels to scroll by on the Y axis 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void doScrollY(int delta) { 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSmoothScrollingEnabled) { 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(0, delta); 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(0, delta); 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link View#scrollBy}, but scroll smoothly instead of immediately. 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dx the number of pixels to scroll by on the X axis 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dy the number of pixels to scroll by on the Y axis 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollBy(int dx, int dy) { 11953fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell if (getChildCount() == 0) { 11963fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell // Nothing to do. 11973fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell return; 11983fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell } 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll; 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (duration > ANIMATED_SCROLL_GAP) { 1201f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int height = getHeight() - mPaddingBottom - mPaddingTop; 1202f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int bottom = getChildAt(0).getHeight(); 1203f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int maxY = Math.max(0, bottom - height); 1204f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int scrollY = mScrollY; 1205f54460576e88d7531b171575d37264dfe0a34f33Adam Powell dy = Math.max(0, Math.min(scrollY + dy, maxY)) - scrollY; 1206f54460576e88d7531b171575d37264dfe0a34f33Adam Powell 1207f54460576e88d7531b171575d37264dfe0a34f33Adam Powell mScroller.startScroll(mScrollX, scrollY, 0, dy); 1208df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mScroller.isFinished()) { 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.abortAnimation(); 1212ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 1213ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 1214ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 1215ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(dx, dy); 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastScroll = AnimationUtils.currentAnimationTimeMillis(); 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link #scrollTo}, but scroll smoothly instead of immediately. 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x the position where to scroll on the X axis 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y the position where to scroll on the Y axis 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollTo(int x, int y) { 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(x - mScrollX, y - mScrollY); 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The scroll range of a scroll view is the overall height of all of its 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children.</p> 12359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeVerticalScrollRange() { 1238a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int count = getChildCount(); 1239a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int contentHeight = getHeight() - mPaddingBottom - mPaddingTop; 12400b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (count == 0) { 1241a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell return contentHeight; 12420b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 12434e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1244637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int scrollRange = getChildAt(0).getBottom(); 1245637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollY = mScrollY; 1246637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overscrollBottom = Math.max(0, scrollRange - contentHeight); 1247637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (scrollY < 0) { 1248637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange -= scrollY; 1249637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (scrollY > overscrollBottom) { 1250637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange += scrollY - overscrollBottom; 1251637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1252637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1253637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return scrollRange; 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12560b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell @Override 12570b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell protected int computeVerticalScrollOffset() { 12580b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return Math.max(0, super.computeVerticalScrollOffset()); 12590b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1262b6824bf58a0cd34395993fa204217e8e246de6fbFilip Gruszczynski protected void measureChild(View child, int parentWidthMeasureSpec, 1263b6824bf58a0cd34395993fa204217e8e246de6fbFilip Gruszczynski int parentHeightMeasureSpec) { 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams lp = child.getLayoutParams(); 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthMeasureSpec; 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightMeasureSpec; 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, mPaddingLeft 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + mPaddingRight, lp.width); 1271115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int verticalPadding = mPaddingTop + mPaddingBottom; 1272d5dbf4b2a09c9cf2d17fa6af3fdf75d1fb774056Adam Powell childHeightMeasureSpec = MeasureSpec.makeSafeMeasureSpec( 1273115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar Math.max(0, MeasureSpec.getSize(parentHeightMeasureSpec) - verticalPadding), 1274115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar MeasureSpec.UNSPECIFIED); 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, 12819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int parentHeightMeasureSpec, int heightUsed) { 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + widthUsed, lp.width); 1287115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int usedTotal = mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin + 1288115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar heightUsed; 1289d5dbf4b2a09c9cf2d17fa6af3fdf75d1fb774056Adam Powell final int childHeightMeasureSpec = MeasureSpec.makeSafeMeasureSpec( 1290115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar Math.max(0, MeasureSpec.getSize(parentHeightMeasureSpec) - usedTotal), 1291115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar MeasureSpec.UNSPECIFIED); 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void computeScroll() { 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScroller.computeScrollOffset()) { 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is called at drawing time by ViewGroup. We don't want to 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // re-show the scrollbars at this point, which scrollTo will do, 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so we replicate most of scrollTo here. 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's a little odd to call onScrollChanged from inside the drawing. 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It is, except when you remember that computeScroll() is used to 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // animate scrolling. So unless we want to defer the onScrollChanged() 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // until the end of the animated scrolling, we don't really have a 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // choice here. 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // I agree. The alternative, which I think would be worse, is to post 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // something and tell the subclasses later. This is bad because there 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // will be a window where mScrollX/Y is different from what the app 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // thinks it is. 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldX = mScrollX; 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldY = mScrollY; 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int x = mScroller.getCurrX(); 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int y = mScroller.getCurrY(); 131917dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell 1320637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (oldX != x || oldY != y) { 1321e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int range = getScrollRange(); 1322e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 1323e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 1324e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 1325e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1326e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio overScrollBy(x - oldX, y - oldY, oldX, oldY, 0, range, 1327637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 0, mOverflingDistance, false); 1328637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell onScrollChanged(mScrollX, mScrollY, oldX, oldY); 1329637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1330e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio if (canOverscroll) { 1331637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (y < 0 && oldY >= 0) { 1332637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowTop.onAbsorb((int) mScroller.getCurrVelocity()); 1333637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (y > range && oldY <= range) { 1334637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowBottom.onAbsorb((int) mScroller.getCurrVelocity()); 1335637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 13369d32d24dbd8a015c9d5c44ed4901d5a666eb8e7fAdam Powell } 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1338e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1339e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy if (!awakenScrollBars()) { 1340e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy // Keep on drawing until the animation has finished. 1341df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1342e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy } 1343ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } else { 1344ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 1345ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 1346ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 1347ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls the view to the given child. 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child the View to scroll to 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollToChild(View child) { 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getDrawingRect(mTempRect); 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Offset from child's local coordinates to ScrollView coordinates */ 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(child, mTempRect); 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta != 0) { 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(0, scrollDelta); 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If rect is off screen, scroll just enough to get it (or at least the 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * first screen size chunk of it) on screen. 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rectangle. 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param immediate True to scroll immediately without animation 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if scrolling was performed 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollToChildRect(Rect rect, boolean immediate) { 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int delta = computeScrollDeltaToGetChildRectOnScreen(rect); 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = delta != 0; 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (immediate) { 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(0, delta); 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(0, delta); 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Compute the amount to scroll in the Y direction in order to get 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a rectangle completely on the screen (or, if taller than the screen, 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least the first screen size chunk of it). 13949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rect. 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The scroll delta. 13979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) { 1399ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() == 0) return 0; 14009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 14029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenTop = getScrollY(); 14039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenBottom = screenTop + height; 14049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdge = getVerticalFadingEdgeLength(); 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for top fading edge as long as rect isn't at very top 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.top > 0) { 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenTop += fadingEdge; 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for bottom fading edge as long as rect isn't at very bottom 14139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.bottom < getChildAt(0).getHeight()) { 14149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenBottom -= fadingEdge; 14159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollYDelta = 0; 14189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.bottom > screenBottom && rect.top > screenTop) { 14209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move down to get it in view: move down just enough so 14219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 14229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 14239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 14259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 14269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.top - screenTop); 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at bottom of screen 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.bottom - screenBottom); 14309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our content 1433ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int bottom = getChildAt(0).getBottom(); 14349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToBottom = bottom - screenBottom; 14359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.min(scrollYDelta, distanceToBottom); 14369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.top < screenTop && rect.bottom < screenBottom) { 14389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move up to get it in view: move up just enough so that 14399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (screenBottom - rect.bottom); 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at top 14479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (screenTop - rect.top); 14489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the top our content 14519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.max(scrollYDelta, -getScrollY()); 14529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollYDelta; 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestChildFocus(View child, View focused) { 14582ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (!mIsLayoutDirty) { 14592ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne scrollToChild(focused); 14602ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne } else { 14612ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne // The child may not be laid out yet, we can't compute the scroll yet 14622ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne mChildToScrollTo = focused; 14639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestChildFocus(child, focused); 14659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When looking for focus in children of a scroll view, need to be a little 14709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * more careful not to give focus to something that is scrolled off screen. 14719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 14729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is more expensive than the default {@link android.view.ViewGroup} 14739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * implementation, otherwise this behavior might have been made the default. 14749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean onRequestFocusInDescendants(int direction, 14779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect previouslyFocusedRect) { 14789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // convert from forward / backward notation to up / down / left / right 14809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (ugh). 14819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_FORWARD) { 14829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_DOWN; 14839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == View.FOCUS_BACKWARD) { 14849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_UP; 14859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = previouslyFocusedRect == null ? 14889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocus(this, null, direction) : 14899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocusFromRect(this, 14909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect, direction); 14919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus == null) { 14939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 14949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isOffScreen(nextFocus)) { 14979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 14989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocus.requestFocus(direction, previouslyFocusedRect); 15014e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira } 15029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 15049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rectangle, 15059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean immediate) { 15069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset into coordinate space of this scroll view 15079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rectangle.offset(child.getLeft() - child.getScrollX(), 15089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getTop() - child.getScrollY()); 15099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollToChildRect(rectangle, immediate); 15119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 15149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestLayout() { 15159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = true; 15169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestLayout(); 15179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1520ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick protected void onDetachedFromWindow() { 1521ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick super.onDetachedFromWindow(); 1522ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1523ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mScrollStrictSpan != null) { 1524ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan.finish(); 1525ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = null; 1526ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1527ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 1528ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 1529ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 1530ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1531ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1532ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1533ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick @Override 15349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onLayout(boolean changed, int l, int t, int r, int b) { 15359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onLayout(changed, l, t, r, b); 15369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = false; 15374e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira // Give a child focus if it needs it 15389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChildToScrollTo != null && isViewDescendantOf(mChildToScrollTo, this)) { 15399c9573721140c260d4614c7ac58923dcfa0cea22Romain Guy scrollToChild(mChildToScrollTo); 15409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChildToScrollTo = null; 15429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15437a46dde1ae56a85fcb5cdac91173424b6355bf3cChet Haase if (!isLaidOut()) { 1544d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio if (mSavedState != null) { 1545d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio mScrollY = mSavedState.scrollPosition; 1546d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio mSavedState = null; 1547d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } // mScrollY default value is "0" 1548d6d543977da14adb3ef9322a0b7ec3fdd027a55eFabrice Di Meglio 1549d6d543977da14adb3ef9322a0b7ec3fdd027a55eFabrice Di Meglio final int childHeight = (getChildCount() > 0) ? getChildAt(0).getMeasuredHeight() : 0; 1550d6d543977da14adb3ef9322a0b7ec3fdd027a55eFabrice Di Meglio final int scrollRange = Math.max(0, 1551d6d543977da14adb3ef9322a0b7ec3fdd027a55eFabrice Di Meglio childHeight - (b - t - mPaddingBottom - mPaddingTop)); 1552d6d543977da14adb3ef9322a0b7ec3fdd027a55eFabrice Di Meglio 1553d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio // Don't forget to clamp 1554d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio if (mScrollY > scrollRange) { 1555d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio mScrollY = scrollRange; 1556d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } else if (mScrollY < 0) { 1557d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio mScrollY = 0; 1558d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1559d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1560d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1561f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa // Calling this with the present values causes it to re-claim them 15629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollTo(mScrollX, mScrollY); 15639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 15669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onSizeChanged(int w, int h, int oldw, int oldh) { 15679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onSizeChanged(w, h, oldw, oldh); 15689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 15709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (null == currentFocused || this == currentFocused) 15719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 15729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15737d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra // If the currently-focused view was visible on the screen when the 15747d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra // screen was at the old height, then scroll the screen to make that 15757d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra // view visible with the new screen height. 15767d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra if (isWithinDeltaOfScreen(currentFocused, 0, oldh)) { 15779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused.getDrawingRect(mTempRect); 15789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocused, mTempRect); 15799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 15809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(scrollDelta); 15819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15824e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira } 15839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1585f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa * Return true if child is a descendant of parent, (or equal to the parent). 15869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1587e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static boolean isViewDescendantOf(View child, View parent) { 15889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 15899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 15909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 15939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewDescendantOf((View) theParent, parent); 15944e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira } 15959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fling the scroll view 15989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 15999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param velocityY The initial velocity in the Y direction. Positive 160052964243dc95f74ac2ab9a96d031a36931a11931Gilles Debunne * numbers mean that the finger/cursor is moving down the screen, 16019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * which means we want to scroll towards the top. 16029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 16039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void fling(int velocityY) { 1604ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 1605ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int height = getHeight() - mPaddingBottom - mPaddingTop; 1606ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int bottom = getChildAt(0).getHeight(); 16074e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 16084e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira mScroller.fling(mScrollX, mScrollY, 0, velocityY, 0, 0, 0, 1609637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Math.max(0, bottom - height), 0, height/2); 16104e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1611ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan == null) { 1612ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = StrictMode.enterCriticalSpan("ScrollView-fling"); 1613ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1614ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1615df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 16169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 161910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell private void flingWithNestedDispatch(int velocityY) { 1620b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell final boolean canFling = (mScrollY > 0 || velocityY > 0) && 1621b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell (mScrollY < getScrollRange() || velocityY < 0); 16229413b245a6e5264ce4e57c48a90ee96f914476e2Adam Powell if (!dispatchNestedPreFling(0, velocityY)) { 16239413b245a6e5264ce4e57c48a90ee96f914476e2Adam Powell dispatchNestedFling(0, velocityY, canFling); 16249413b245a6e5264ce4e57c48a90ee96f914476e2Adam Powell if (canFling) { 16259413b245a6e5264ce4e57c48a90ee96f914476e2Adam Powell fling(velocityY); 16269413b245a6e5264ce4e57c48a90ee96f914476e2Adam Powell } 162710ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } 162810ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } 162910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell 1630ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick private void endDrag() { 1631ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mIsBeingDragged = false; 1632ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 163313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 1634ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1635ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mEdgeGlowTop != null) { 1636ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mEdgeGlowTop.onRelease(); 1637ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mEdgeGlowBottom.onRelease(); 1638ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1639ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1640ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mScrollStrictSpan != null) { 1641ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan.finish(); 1642ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = null; 1643ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1644ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1645ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 16469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 16479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 16489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 16499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>This version also clamps the scrolling to the bounds of our child. 16509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 165152964243dc95f74ac2ab9a96d031a36931a11931Gilles Debunne @Override 16529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void scrollTo(int x, int y) { 16539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we rely on the fact the View.scrollBy calls scrollTo. 16549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 16559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 16569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project x = clamp(x, getWidth() - mPaddingRight - mPaddingLeft, child.getWidth()); 16579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project y = clamp(y, getHeight() - mPaddingBottom - mPaddingTop, child.getHeight()); 16589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x != mScrollX || y != mScrollY) { 16599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.scrollTo(x, y); 16609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1661637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1662637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1663637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1664637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1665637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverScrollMode(int mode) { 1666637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mode != OVER_SCROLL_NEVER) { 1667637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop == null) { 16684e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira Context context = getContext(); 166989935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowTop = new EdgeEffect(context); 167089935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowBottom = new EdgeEffect(context); 1671637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1672637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 1673637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowTop = null; 1674637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowBottom = null; 1675637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1676637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.setOverScrollMode(mode); 1677637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1678637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1679637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 168010ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) { 168110ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell return (nestedScrollAxes & SCROLL_AXIS_VERTICAL) != 0; 168210ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } 168310ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell 1684b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell @Override 1685b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell public void onNestedScrollAccepted(View child, View target, int axes) { 1686b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell super.onNestedScrollAccepted(child, target, axes); 1687b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell startNestedScroll(SCROLL_AXIS_VERTICAL); 1688b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell } 1689b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell 169010ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell /** 169110ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell * @inheritDoc 169210ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell */ 169310ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell @Override 169410ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell public void onStopNestedScroll(View target) { 169510ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell super.onStopNestedScroll(target); 169610ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } 169710ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell 169810ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell @Override 169910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell public void onNestedScroll(View target, int dxConsumed, int dyConsumed, 170010ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell int dxUnconsumed, int dyUnconsumed) { 1701b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell final int oldScrollY = mScrollY; 170210ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell scrollBy(0, dyUnconsumed); 1703b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell final int myConsumed = mScrollY - oldScrollY; 1704b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell final int myUnconsumed = dyUnconsumed - myConsumed; 1705b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell dispatchNestedScroll(0, myConsumed, 0, myUnconsumed, null); 170610ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } 170710ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell 170810ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell /** 170910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell * @inheritDoc 171010ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell */ 171110ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell @Override 1712b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell public boolean onNestedFling(View target, float velocityX, float velocityY, boolean consumed) { 1713b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell if (!consumed) { 1714b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell flingWithNestedDispatch((int) velocityY); 1715b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell return true; 1716b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell } 1717b36e4f944fe28ce68182f9ec91e5341866b49084Adam Powell return false; 171810ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell } 171910ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell 172010ba27734ee6274a772be8d6b1faa703ee3a3d6bAdam Powell @Override 1721637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void draw(Canvas canvas) { 1722637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.draw(canvas); 1723637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop != null) { 1724637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollY = mScrollY; 1725c81c0826289550864d8448a7286e59421e78db39Doris Liu final boolean clipToPadding = getClipToPadding(); 1726637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowTop.isFinished()) { 1727637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 1728c81c0826289550864d8448a7286e59421e78db39Doris Liu final int width; 1729c81c0826289550864d8448a7286e59421e78db39Doris Liu final int height; 1730c81c0826289550864d8448a7286e59421e78db39Doris Liu final float translateX; 1731c81c0826289550864d8448a7286e59421e78db39Doris Liu final float translateY; 1732c81c0826289550864d8448a7286e59421e78db39Doris Liu if (clipToPadding) { 1733c81c0826289550864d8448a7286e59421e78db39Doris Liu width = getWidth() - mPaddingLeft - mPaddingRight; 1734c81c0826289550864d8448a7286e59421e78db39Doris Liu height = getHeight() - mPaddingTop - mPaddingBottom; 1735c81c0826289550864d8448a7286e59421e78db39Doris Liu translateX = mPaddingLeft; 1736c81c0826289550864d8448a7286e59421e78db39Doris Liu translateY = mPaddingTop; 1737c81c0826289550864d8448a7286e59421e78db39Doris Liu } else { 1738c81c0826289550864d8448a7286e59421e78db39Doris Liu width = getWidth(); 1739c81c0826289550864d8448a7286e59421e78db39Doris Liu height = getHeight(); 1740c81c0826289550864d8448a7286e59421e78db39Doris Liu translateX = 0; 1741c81c0826289550864d8448a7286e59421e78db39Doris Liu translateY = 0; 1742c81c0826289550864d8448a7286e59421e78db39Doris Liu } 1743c81c0826289550864d8448a7286e59421e78db39Doris Liu canvas.translate(translateX, Math.min(0, scrollY) + translateY); 1744c81c0826289550864d8448a7286e59421e78db39Doris Liu mEdgeGlowTop.setSize(width, height); 1745637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop.draw(canvas)) { 1746df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1747637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1748637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1749637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1750637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowBottom.isFinished()) { 1751637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 1752c81c0826289550864d8448a7286e59421e78db39Doris Liu final int width; 1753c81c0826289550864d8448a7286e59421e78db39Doris Liu final int height; 1754c81c0826289550864d8448a7286e59421e78db39Doris Liu final float translateX; 1755c81c0826289550864d8448a7286e59421e78db39Doris Liu final float translateY; 1756c81c0826289550864d8448a7286e59421e78db39Doris Liu if (clipToPadding) { 1757c81c0826289550864d8448a7286e59421e78db39Doris Liu width = getWidth() - mPaddingLeft - mPaddingRight; 1758c81c0826289550864d8448a7286e59421e78db39Doris Liu height = getHeight() - mPaddingTop - mPaddingBottom; 1759c81c0826289550864d8448a7286e59421e78db39Doris Liu translateX = mPaddingLeft; 1760c81c0826289550864d8448a7286e59421e78db39Doris Liu translateY = mPaddingTop; 1761c81c0826289550864d8448a7286e59421e78db39Doris Liu } else { 1762c81c0826289550864d8448a7286e59421e78db39Doris Liu width = getWidth(); 1763c81c0826289550864d8448a7286e59421e78db39Doris Liu height = getHeight(); 1764c81c0826289550864d8448a7286e59421e78db39Doris Liu translateX = 0; 1765c81c0826289550864d8448a7286e59421e78db39Doris Liu translateY = 0; 1766c81c0826289550864d8448a7286e59421e78db39Doris Liu } 1767c81c0826289550864d8448a7286e59421e78db39Doris Liu canvas.translate(-width + translateX, 1768c81c0826289550864d8448a7286e59421e78db39Doris Liu Math.max(getScrollRange(), scrollY) + height + translateY); 1769637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(180, width, 0); 1770b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira mEdgeGlowBottom.setSize(width, height); 1771637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowBottom.draw(canvas)) { 1772df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1773637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1774637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1775637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 17769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1779e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static int clamp(int n, int my, int child) { 17809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (my >= child || n < 0) { 17819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* my >= child is this case: 17829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |--------------- me ---------------| 17839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 17849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or 17859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |--------------- me ---------------| 17869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 17879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or 17889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |--------------- me ---------------| 17899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 17909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 17919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * n < 0 is this case: 17929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ me ------| 17939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |-------- child --------| 17949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |-- mScrollX --| 17959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 17969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 17979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 17989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((my+n) > child) { 17999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* this case: 18009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ me ------| 18019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 18029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |-- mScrollX --| 18039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 18049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child-my; 18059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 18069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return n; 18079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1808d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1809d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio @Override 1810d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio protected void onRestoreInstanceState(Parcelable state) { 181190f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell if (mContext.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.JELLY_BEAN_MR2) { 181290f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Some old apps reused IDs in ways they shouldn't have. 181390f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Don't break them, but they don't get scroll state restoration. 181490f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell super.onRestoreInstanceState(state); 181590f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell return; 181690f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell } 1817d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio SavedState ss = (SavedState) state; 1818d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio super.onRestoreInstanceState(ss.getSuperState()); 1819d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio mSavedState = ss; 1820d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio requestLayout(); 1821d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1822d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1823d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio @Override 1824d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio protected Parcelable onSaveInstanceState() { 182590f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell if (mContext.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.JELLY_BEAN_MR2) { 182690f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Some old apps reused IDs in ways they shouldn't have. 182790f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Don't break them, but they don't get scroll state restoration. 182890f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell return super.onSaveInstanceState(); 182990f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell } 1830d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio Parcelable superState = super.onSaveInstanceState(); 1831d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio SavedState ss = new SavedState(superState); 1832d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio ss.scrollPosition = mScrollY; 1833d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio return ss; 1834d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1835d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 183694a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy /** @hide */ 183794a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy @Override 183894a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy protected void encodeProperties(@NonNull ViewHierarchyEncoder encoder) { 183994a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy super.encodeProperties(encoder); 184094a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy encoder.addProperty("fillViewport", mFillViewport); 184194a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy } 184294a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy 1843d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio static class SavedState extends BaseSavedState { 1844d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio public int scrollPosition; 1845d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1846d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio SavedState(Parcelable superState) { 1847d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio super(superState); 1848d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1849d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1850d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio public SavedState(Parcel source) { 1851d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio super(source); 1852d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio scrollPosition = source.readInt(); 1853d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1854d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1855d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio @Override 1856d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio public void writeToParcel(Parcel dest, int flags) { 1857d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio super.writeToParcel(dest, flags); 1858d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio dest.writeInt(scrollPosition); 1859d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1860d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1861d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio @Override 1862d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio public String toString() { 1863d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio return "HorizontalScrollView.SavedState{" 1864d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio + Integer.toHexString(System.identityHashCode(this)) 1865d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio + " scrollPosition=" + scrollPosition + "}"; 1866d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1867d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1868d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio public static final Parcelable.Creator<SavedState> CREATOR 1869d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio = new Parcelable.Creator<SavedState>() { 1870d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio public SavedState createFromParcel(Parcel in) { 1871d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio return new SavedState(in); 1872d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1873d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 1874d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio public SavedState[] newArray(int size) { 1875d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio return new SavedState[size]; 1876d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1877d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio }; 1878d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio } 1879d6befbdd17f528d87e313b3665b248b670f8615cFabrice Di Meglio 18809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1881