ScrollView.java revision 48d1586f4065fc9ab97a679da1e4f7c327c943f2
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 1917dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powellimport com.android.internal.R; 2017dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 23637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Canvas; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Rect; 25a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganovimport android.os.Bundle; 26ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrickimport android.os.StrictMode; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.FocusFinder; 2933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brownimport android.view.InputDevice; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.KeyEvent; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.MotionEvent; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.VelocityTracker; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewConfiguration; 352ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.ViewDebug; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 38a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityEvent; 39a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityNodeInfo; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.animation.AnimationUtils; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.List; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout container for a view hierarchy that can be scrolled by the user, 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * allowing it to be larger than the physical display. A ScrollView 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link FrameLayout}, meaning you should place one child in it 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * containing the entire contents to scroll; this child may itself be a layout 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manager with a complex hierarchy of objects. A child that is often used 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link LinearLayout} in a vertical orientation, presenting a vertical 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * array of top-level items that the user can scroll through. 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The {@link TextView} class also 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * takes care of its own scrolling, so does not require a ScrollView, but 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * using the two together is possible to achieve the effect of a text view 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within a larger container. 574e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>ScrollView only supports vertical scrolling. 59fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * 60fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#ScrollView_fillViewport 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ScrollView extends FrameLayout { 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final int ANIMATED_SCROLL_GAP = 250; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final float MAX_SCROLL_FACTOR = 0.5f; 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long mLastScroll; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final Rect mTempRect = new Rect(); 70637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private OverScroller mScroller; 7189935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect mEdgeGlowTop; 7289935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect mEdgeGlowBottom; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Position of the last motion event. 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 77df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell private int mLastMotionY; 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True when the layout has changed but the traversal has not come through yet. 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Ideally the view hierarchy would keep track of this for us. 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsLayoutDirty = true; 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The child to give focus to in the event that a child has requested focus while the 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout is dirty. This prevents the scroll from being wrong if the child has not been 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * laid out before requesting focus. 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mChildToScrollTo = null; 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True if the user is currently dragging this ScrollView around. This is 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not the same as 'is being flinged', which can be checked by 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mScroller.isFinished() (flinging begins when the user lifts his finger). 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsBeingDragged = false; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determines speed during touch scrolling 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private VelocityTracker mVelocityTracker; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When set to true, the scroll view measure its child to make it fill the currently 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible area. 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 108a174d7a0d5475dbae2b48f7359abf1637a882896Romain Guy @ViewDebug.ExportedProperty(category = "layout") 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mFillViewport; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether arrow scrolling is animated. 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mSmoothScrollingEnabled = true; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mTouchSlop; 1174296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMinimumVelocity; 1184296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMaximumVelocity; 1194e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 120637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverscrollDistance; 121637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverflingDistance; 122637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 123bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell /** 124bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * ID of the active pointer. This is used to retain consistency during 125bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * drags/flings if multiple pointers are used. 126bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell */ 127bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell private int mActivePointerId = INVALID_POINTER; 128ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 129ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick /** 130ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * The StrictMode "critical time span" objects to catch animation 131ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * stutters. Non-null when a time-sensitive animation is 132ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * in-flight. Must call finish() on them when done animating. 133ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick * These are no-ops on user builds. 134ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick */ 135ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick private StrictMode.Span mScrollStrictSpan = null; // aka "drag" 136ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick private StrictMode.Span mFlingStrictSpan = null; 137ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 138bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell /** 139bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * Sentinel value for no current active pointer. 140bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * Used by {@link #mActivePointerId}. 141bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell */ 142bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell private static final int INVALID_POINTER = -1; 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScrollView(Context context) { 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScrollView(Context context, AttributeSet attrs) { 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.scrollViewStyle); 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScrollView(Context context, AttributeSet attrs, int defStyle) { 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project initScrollView(); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.ScrollView, defStyle, 0); 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFillViewport(a.getBoolean(R.styleable.ScrollView_fillViewport, false)); 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 165e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy public boolean shouldDelayChildPressedState() { 166e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy return true; 167e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy } 168e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy 169e0a799a2ac1ca78e30fbac9e4e12a063425c08d3Patrick Dubroy @Override 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getTopFadingEdgeStrength() { 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getVerticalFadingEdgeLength(); 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScrollY < length) { 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mScrollY / (float) length; 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getBottomFadingEdgeStrength() { 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getVerticalFadingEdgeLength(); 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int bottomEdge = getHeight() - mPaddingBottom; 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int span = getChildAt(0).getBottom() - mScrollY - bottomEdge; 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (span < length) { 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return span / (float) length; 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount this scroll view will scroll in response to 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mBottom - mTop)); 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void initScrollView() { 209637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller = new OverScroller(getContext()); 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFocusable(true); 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setWillNotDraw(false); 2134296fc4d326447875c26a925f12b3935632f13bbRomain Guy final ViewConfiguration configuration = ViewConfiguration.get(mContext); 2144296fc4d326447875c26a925f12b3935632f13bbRomain Guy mTouchSlop = configuration.getScaledTouchSlop(); 2154296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMinimumVelocity = configuration.getScaledMinimumFlingVelocity(); 2164296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 217637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance = configuration.getScaledOverscrollDistance(); 218637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance = configuration.getScaledOverflingDistance(); 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child) { 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("ScrollView can host only one direct child"); 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child); 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index) { 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("ScrollView can host only one direct child"); 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index); 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, ViewGroup.LayoutParams params) { 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("ScrollView can host only one direct child"); 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, params); 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, int index, ViewGroup.LayoutParams params) { 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, index, params); 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns true this ScrollView can be scrolled 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean canScroll() { 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeight = child.getHeight(); 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getHeight() < childHeight + mPaddingTop + mPaddingBottom; 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates whether this ScrollView's content is stretched to fill the viewport. 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if the content fills the viewport, false otherwise. 2734e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 274fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#ScrollView_fillViewport 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isFillViewport() { 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFillViewport; 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Indicates this ScrollView whether it should stretch its content height to fill 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the viewport or not. 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fillViewport True to stretch the content's height to the viewport's 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * boundaries, false otherwise. 2864e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 287fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#ScrollView_fillViewport 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFillViewport(boolean fillViewport) { 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fillViewport != mFillViewport) { 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFillViewport = fillViewport; 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether arrow scrolling will animate its transition. 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSmoothScrollingEnabled() { 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSmoothScrollingEnabled; 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set whether arrow scrolling will animate its transition. 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param smoothScrollingEnabled whether arrow scrolling will animate its transition 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSmoothScrollingEnabled(boolean smoothScrollingEnabled) { 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSmoothScrollingEnabled = smoothScrollingEnabled; 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mFillViewport) { 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (heightMode == MeasureSpec.UNSPECIFIED) { 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 324ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 325ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final View child = getChildAt(0); 326ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int height = getMeasuredHeight(); 327ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (child.getMeasuredHeight() < height) { 328ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final FrameLayout.LayoutParams lp = (LayoutParams) child.getLayoutParams(); 3294e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 3309c9573721140c260d4614c7ac58923dcfa0cea22Romain Guy int childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec, 3319c9573721140c260d4614c7ac58923dcfa0cea22Romain Guy mPaddingLeft + mPaddingRight, lp.width); 332ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy height -= mPaddingTop; 333ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy height -= mPaddingBottom; 334ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int childHeightMeasureSpec = 335ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 3364e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 337ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 338ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Let the focused view and/or our descendants get the key first 3458e618e54ef0f009cac15972af9d9a72d6f6b6f94Romain Guy return super.dispatchKeyEvent(event) || executeKeyEvent(event); 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You can call this function yourself to have the scroll view perform 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling from a key event, just as if the event had been dispatched to 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it by the view hierarchy. 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param event The key event to execute. 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Return true if the event was handled, else false. 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean executeKeyEvent(KeyEvent event) { 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.setEmpty(); 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!canScroll()) { 3602d4cff64b4c864aa5f6859b73ffa65e31ee915acRomain Guy if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) { 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused, View.FOCUS_DOWN); 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocused != null 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && nextFocused != this 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && nextFocused.requestFocus(View.FOCUS_DOWN); 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (event.getAction() == KeyEvent.ACTION_DOWN) { 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (event.getKeyCode()) { 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_UP: 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_UP); 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_UP); 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_DOWN: 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_DOWN); 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_DOWN); 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pageScroll(event.isShiftPressed() ? View.FOCUS_UP : View.FOCUS_DOWN); 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3989f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato private boolean inChild(int x, int y) { 3999f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato if (getChildCount() > 0) { 400352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell final int scrollY = mScrollY; 4019f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato final View child = getChildAt(0); 402352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell return !(y < child.getTop() - scrollY 403352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || y >= child.getBottom() - scrollY 4049f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato || x < child.getLeft() 4059f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato || x >= child.getRight()); 4069f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 4079f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato return false; 4089f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 4099f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato 41013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initOrResetVelocityTracker() { 41113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 41213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 41313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } else { 41413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.clear(); 41513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 41613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 41713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 41813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initVelocityTrackerIfNotExists() { 41913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 42013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 42113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 42213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 42313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 42413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void recycleVelocityTracker() { 42513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker != null) { 42613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.recycle(); 42713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = null; 42813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 42913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 43013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 43113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka @Override 43213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) { 43313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (disallowIntercept) { 43413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 43513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 43613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka super.requestDisallowInterceptTouchEvent(disallowIntercept); 43713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 43813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 43913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onInterceptTouchEvent(MotionEvent ev) { 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This method JUST determines whether we want to intercept the motion. 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If we return true, onMotionEvent will be called and we do the actual 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling there. 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Shortcut the most recurring case: the user is in the dragging 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * state and he is moving his finger. We want to intercept this 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * motion. 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((action == MotionEvent.ACTION_MOVE) && (mIsBeingDragged)) { 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 458bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell switch (action & MotionEvent.ACTION_MASK) { 459bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_MOVE: { 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether the user has moved far enough from his original down touch. 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Locally do absolute value. mLastMotionY is set to the y value 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the down event. 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4699d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int activePointerId = mActivePointerId; 4709d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell if (activePointerId == INVALID_POINTER) { 4719d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell // If we don't have a valid id, the touch down wasn't on content. 4729d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell break; 4739d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell } 4749d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell 4759d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int pointerIndex = ev.findPointerIndex(activePointerId); 476df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int y = (int) ev.getY(pointerIndex); 477df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int yDiff = Math.abs(y - mLastMotionY); 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (yDiff > mTouchSlop) { 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = true; 480f7b4accbda1a4d98a5fadbf3984cb9666a4fe9e9Romain Guy mLastMotionY = y; 48113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 48213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 483ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mScrollStrictSpan == null) { 484ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = StrictMode.enterCriticalSpan("ScrollView-scroll"); 485ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 486b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 487b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 488b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 489b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 492bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 494bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_DOWN: { 495df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int y = (int) ev.getY(); 4964cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (!inChild((int) ev.getX(), (int) y)) { 4979f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato mIsBeingDragged = false; 49813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 4999f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato break; 5009f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 5019f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato 502bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell /* 503bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * Remember location of down touch. 504bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell * ACTION_DOWN always refers to pointer index 0. 505bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell */ 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastMotionY = y; 507bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = ev.getPointerId(0); 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 50913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initOrResetVelocityTracker(); 51013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If being flinged and user touches the screen, initiate drag; 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * otherwise don't. mScroller.isFinished should be false when 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being flinged. 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = !mScroller.isFinished(); 517ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mIsBeingDragged && mScrollStrictSpan == null) { 518ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = StrictMode.enterCriticalSpan("ScrollView-scroll"); 519ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 521bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_CANCEL: 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Release the drag */ 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = false; 527bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = INVALID_POINTER; 52813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 529637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange())) { 530df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 531637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 532bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 533bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_POINTER_UP: 534bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell onSecondaryPointerUp(ev); 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The only time we want to intercept motion events is if we are in the 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drag mode. 5419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mIsBeingDragged; 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent ev) { 54713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mVelocityTracker.addMovement(ev); 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 552bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell switch (action & MotionEvent.ACTION_MASK) { 553bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_DOWN: { 554b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (getChildCount() == 0) { 555fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown return false; 556fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown } 557b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if ((mIsBeingDragged = !mScroller.isFinished())) { 558b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 559b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 560b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 561b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 562b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 5634e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 564352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell /* 565352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * If being flinged and user touches, stop the fling. isFinished 566352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * will be false if being flinged. 567352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell */ 568352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (!mScroller.isFinished()) { 569352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mScroller.abortAnimation(); 570ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 571ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 572ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 573ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 574352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 575352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember where the motion event started 577df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(); 578bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = ev.getPointerId(0); 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 580bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_MOVE: 582b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int activePointerIndex = ev.findPointerIndex(mActivePointerId); 583b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int y = (int) ev.getY(activePointerIndex); 584b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell int deltaY = mLastMotionY - y; 585b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (!mIsBeingDragged && Math.abs(deltaY) > mTouchSlop) { 586b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 587b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 588b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 589b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 590b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell mIsBeingDragged = true; 591b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (deltaY > 0) { 592b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaY -= mTouchSlop; 593b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } else { 594b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaY += mTouchSlop; 595b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 596b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 5979f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato if (mIsBeingDragged) { 5989f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato // Scroll to follow the motion event 5999f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato mLastMotionY = y; 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 601637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldX = mScrollX; 602637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldY = mScrollY; 603637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int range = getScrollRange(); 604e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 605e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 606e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 607e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 608f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (overScrollBy(0, deltaY, 0, mScrollY, 609e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 0, range, 0, mOverscrollDistance, true)) { 610637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Break our velocity if we hit a scroll barrier. 611637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mVelocityTracker.clear(); 612637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 613637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell onScrollChanged(mScrollX, mScrollY, oldX, oldY); 614637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 615e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio if (canOverscroll) { 616637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int pulledToY = oldY + deltaY; 617637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (pulledToY < 0) { 618637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowTop.onPull((float) deltaY / getHeight()); 619637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowBottom.isFinished()) { 620637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowBottom.onRelease(); 621637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 622637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (pulledToY > range) { 623637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowBottom.onPull((float) deltaY / getHeight()); 624637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowTop.isFinished()) { 625637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowTop.onRelease(); 626637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 627637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 628637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop != null 629637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell && (!mEdgeGlowTop.isFinished() || !mEdgeGlowBottom.isFinished())) { 630df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 631637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 632637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 6339f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato } 634bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 6354e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira case MotionEvent.ACTION_UP: 6369f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato if (mIsBeingDragged) { 6379f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato final VelocityTracker velocityTracker = mVelocityTracker; 6389f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 639bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell int initialVelocity = (int) velocityTracker.getYVelocity(mActivePointerId); 6409f0e8eeab2c9fdce182ad16fb28ad8fa3033eb75Joe Onorato 641f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (getChildCount() > 0) { 642637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if ((Math.abs(initialVelocity) > mMinimumVelocity)) { 643637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell fling(-initialVelocity); 644637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 645f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, 646f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell getScrollRange())) { 647df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 648637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 649637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 65017dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell } 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 652bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = INVALID_POINTER; 653ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick endDrag(); 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 655bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 656352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell case MotionEvent.ACTION_CANCEL: 657352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (mIsBeingDragged && getChildCount() > 0) { 658637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange())) { 659df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 660637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 661352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = INVALID_POINTER; 662ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick endDrag(); 663352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 664352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell break; 6659bc30d31322848d61f518c1db43544988faaba8fAdam Powell case MotionEvent.ACTION_POINTER_DOWN: { 6669bc30d31322848d61f518c1db43544988faaba8fAdam Powell final int index = ev.getActionIndex(); 667df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(index); 6689bc30d31322848d61f518c1db43544988faaba8fAdam Powell mActivePointerId = ev.getPointerId(index); 6699bc30d31322848d61f518c1db43544988faaba8fAdam Powell break; 6709bc30d31322848d61f518c1db43544988faaba8fAdam Powell } 671bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell case MotionEvent.ACTION_POINTER_UP: 672bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell onSecondaryPointerUp(ev); 673df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(ev.findPointerIndex(mActivePointerId)); 674bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell break; 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6784e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 679bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell private void onSecondaryPointerUp(MotionEvent ev) { 680bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 681bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell MotionEvent.ACTION_POINTER_INDEX_SHIFT; 682bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell final int pointerId = ev.getPointerId(pointerIndex); 683bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell if (pointerId == mActivePointerId) { 684bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell // This was our active pointer going up. Choose a new 685bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell // active pointer and adjust accordingly. 686bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell // TODO: Make this decision more intelligent. 687bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 688df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionY = (int) ev.getY(newPointerIndex); 689bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mActivePointerId = ev.getPointerId(newPointerIndex); 690bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell if (mVelocityTracker != null) { 691bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell mVelocityTracker.clear(); 692bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 693bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 694bc4e7533b9c6a6e45e3cf4a889bcb913b8feefc5Adam Powell } 6954e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 696637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 69733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown public boolean onGenericMotionEvent(MotionEvent event) { 69833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { 69933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown switch (event.getAction()) { 70033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown case MotionEvent.ACTION_SCROLL: { 70133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (!mIsBeingDragged) { 70233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final float vscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL); 70333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (vscroll != 0) { 70433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final int delta = (int) (vscroll * getVerticalScrollFactor()); 70533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final int range = getScrollRange(); 70633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown int oldScrollY = mScrollY; 70733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown int newScrollY = oldScrollY - delta; 70833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (newScrollY < 0) { 70933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown newScrollY = 0; 71033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } else if (newScrollY > range) { 71133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown newScrollY = range; 71233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 71333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (newScrollY != oldScrollY) { 71433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown super.scrollTo(mScrollX, newScrollY); 71533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown return true; 71633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 71733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 71833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 71933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown return super.onGenericMotionEvent(event); 72333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown 72533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown @Override 726637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell protected void onOverScrolled(int scrollX, int scrollY, 727637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell boolean clampedX, boolean clampedY) { 728637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Treat animating scrolls differently; see #computeScroll() for why. 729637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mScroller.isFinished()) { 730637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollX = scrollX; 731637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollY = scrollY; 7320fd89bf7221431260883cee4597e2db942d799a0Romain Guy invalidateParentIfNeeded(); 733637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (clampedY) { 734637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller.springBack(mScrollX, mScrollY, 0, 0, 0, getScrollRange()); 735637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 736637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 737637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.scrollTo(scrollX, scrollY); 738637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 739e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy 740e72cf7341a608402309ce894fc12d050cc7c0e14Romain Guy awakenScrollBars(); 741637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 742637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 743a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 744a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov public boolean performAccessibilityAction(int action, Bundle arguments) { 74548d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov if (super.performAccessibilityAction(action, arguments)) { 74648d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return true; 74748d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 748a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov switch (action) { 749a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: { 750a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportHeight = getHeight() - mPaddingBottom - mPaddingTop; 751a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollY = Math.min(mScrollY + viewportHeight, getScrollRange()); 752a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollY != mScrollY) { 753a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(0, targetScrollY); 754a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 755a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 756a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 757a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: { 758a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportHeight = getHeight() - mPaddingBottom - mPaddingTop; 759a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollY = Math.max(mScrollY - viewportHeight, 0); 760a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollY != mScrollY) { 761a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(0, targetScrollY); 762a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 763a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 764a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 765a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 76648d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return false; 767a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 768a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov 769a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov @Override 770a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 771a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov super.onInitializeAccessibilityNodeInfo(info); 7728a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov info.setClassName(ScrollView.class.getName()); 773a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int scrollRange = getScrollRange(); 774a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (scrollRange > 0) { 775a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov info.setScrollable(true); 776a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (mScrollY > 0) { 777a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD); 778a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 779a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (mScrollY < scrollRange) { 780a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD); 781a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 782a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 783a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 784a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 785a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 786a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 787a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov super.onInitializeAccessibilityEvent(event); 7888a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov event.setClassName(ScrollView.class.getName()); 789d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov final boolean scrollable = getScrollRange() > 0; 790d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollable(scrollable); 791d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollX(mScrollX); 792d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollY(mScrollY); 793d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollX(mScrollX); 794d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollY(getScrollRange()); 795a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 796a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 797637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int getScrollRange() { 798637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int scrollRange = 0; 799637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (getChildCount() > 0) { 800637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell View child = getChildAt(0); 801637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange = Math.max(0, 802637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell child.getHeight() - (getHeight() - mPaddingBottom - mPaddingTop)); 803637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 804637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return scrollRange; 805637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 806637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in the specified bounds. 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param topFocus look for a candidate is the one at the top of the bounds 8139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if topFocus is true, or at the bottom of the bounds if topFocus is 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * false 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param top the top offset of the bounds in which a focusable must be 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bottom the bottom offset of the bounds in which a focusable must 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can 8209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInBounds(boolean topFocus, int top, int bottom) { 8239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project List<View> focusables = getFocusables(View.FOCUS_FORWARD); 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusCandidate = null; 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A fully contained focusable is one where its top is below the bound's 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top, and its bottom is above the bound's bottom. A partially 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained focusable is one where some part of it is within the 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds, but it also has some part that is not within bounds. A fully contained 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusable is preferred to a partially contained focusable. 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean foundFullyContainedFocusable = false; 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = focusables.size(); 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = focusables.get(i); 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewTop = view.getTop(); 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewBottom = view.getBottom(); 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (top < viewBottom && viewTop < bottom) { 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the focusable is in the target area, it is a candidate for 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusing 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsFullyContained = (top < viewTop) && 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewBottom < bottom); 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusCandidate == null) { 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* No candidate, take this one */ 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = viewIsFullyContained; 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsCloserToBoundary = 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (topFocus && viewTop < focusCandidate.getTop()) || 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (!topFocus && viewBottom > focusCandidate 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project .getBottom()); 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (foundFullyContainedFocusable) { 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained && viewIsCloserToBoundary) { 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We're dealing with only fully contained views, so 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it has to be closer to the boundary to beat our 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * candidate 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained) { 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Any fully contained view beats a partially contained view */ 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = true; 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (viewIsCloserToBoundary) { 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Partially contained view beats another partially 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained view if it's closer 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return focusCandidate; 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "page up/down" shortcut press. This 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view by one page up or down and give the focus 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the topmost/bottommost component in the new visible area. If no 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_UP} 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page up or 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN} to go one page down 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean pageScroll(int direction) { 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean down = direction == View.FOCUS_DOWN; 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down) { 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = getScrollY() + height; 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = getChildAt(count - 1); 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.top + height > view.getBottom()) { 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = view.getBottom() - height; 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = getScrollY() - height; 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.top < 0) { 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = 0; 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.bottom = mTempRect.top + height; 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.top, mTempRect.bottom); 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "home/end" shortcut press. This 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view to the top or bottom and give the focus 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the topmost/bottommost component in the new visible area. If no 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_UP} 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the top of the view or 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.view.View#FOCUS_DOWN} to go the bottom 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean fullScroll(int direction) { 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean down = direction == View.FOCUS_DOWN; 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = 0; 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.bottom = height; 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (down) { 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = getChildAt(count - 1); 9495435a06010fb50dd8b495df6b7f21f15d82a2c0aMattias Petersson mTempRect.bottom = view.getBottom() + mPaddingBottom; 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.top = mTempRect.bottom - height; 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.top, mTempRect.bottom); 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Scrolls the view to make the area defined by <code>top</code> and 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <code>bottom</code> visible. This method attempts to give the focus 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to a component visible in this area. If no component can be focused in 9612ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne * the new visible area, the focus is reclaimed by this ScrollView.</p> 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_UP} 9642ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne * to go upward, {@link android.view.View#FOCUS_DOWN} to downward 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param top the top offset of the new area to be made visible 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param bottom the bottom offset of the new area to be made visible 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollAndFocus(int direction, int top, int bottom) { 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = true; 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerTop = getScrollY(); 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerBottom = containerTop + height; 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean up = direction == View.FOCUS_UP; 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocused = findFocusableViewInBounds(up, top, bottom); 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocused == null) { 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocused = this; 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (top >= containerTop && bottom <= containerBottom) { 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = false; 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = up ? (top - containerTop) : (bottom - containerBottom); 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(delta); 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9892ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != findFocus()) newFocused.requestFocus(direction); 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle scrolling in response to an up or down arrow click. 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction The direction corresponding to the arrow key that was 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pressed 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if we consumed the event, false otherwise 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean arrowScroll(int direction) { 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, direction); 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = getMaxScrollAmount(); 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10107d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra if (nextFocused != null && isWithinDeltaOfScreen(nextFocused, maxJump, getHeight())) { 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.getDrawingRect(mTempRect); 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(nextFocused, mTempRect); 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(scrollDelta); 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(direction); 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no new focus 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = maxJump; 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_UP && getScrollY() < scrollDelta) { 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = getScrollY(); 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == View.FOCUS_DOWN) { 1023ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 1024ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int daBottom = getChildAt(0).getBottom(); 10255435a06010fb50dd8b495df6b7f21f15d82a2c0aMattias Petersson int screenBottom = getScrollY() + getHeight() - mPaddingBottom; 1026ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (daBottom - screenBottom < maxJump) { 1027ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy scrollDelta = daBottom - screenBottom; 1028ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta == 0) { 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(direction == View.FOCUS_DOWN ? scrollDelta : -scrollDelta); 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused != null && currentFocused.isFocused() 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && isOffScreen(currentFocused)) { 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // previously focused item still has focus and is off screen, give 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it up (take it back to ourselves) 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (also, need to temporarily force FOCUS_BEFORE_DESCENDANTS so we are 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // sure to 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get it) 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int descendantFocusability = getDescendantFocusability(); // save 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS); 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestFocus(); 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(descendantFocusability); // restore 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is scrolled off 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * screen. 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isOffScreen(View descendant) { 10577d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra return !isWithinDeltaOfScreen(descendant, 0, getHeight()); 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is within delta 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixels of being on the screen. 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10647d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra private boolean isWithinDeltaOfScreen(View descendant, int delta, int height) { 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mTempRect.bottom + delta) >= getScrollY() 10697d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra && (mTempRect.top - delta) <= (getScrollY() + height); 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Smooth scroll by a Y delta 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta the number of pixels to scroll by on the Y axis 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void doScrollY(int delta) { 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSmoothScrollingEnabled) { 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(0, delta); 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(0, delta); 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link View#scrollBy}, but scroll smoothly instead of immediately. 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dx the number of pixels to scroll by on the X axis 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dy the number of pixels to scroll by on the Y axis 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollBy(int dx, int dy) { 10943fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell if (getChildCount() == 0) { 10953fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell // Nothing to do. 10963fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell return; 10973fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell } 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll; 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (duration > ANIMATED_SCROLL_GAP) { 1100f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int height = getHeight() - mPaddingBottom - mPaddingTop; 1101f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int bottom = getChildAt(0).getHeight(); 1102f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int maxY = Math.max(0, bottom - height); 1103f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int scrollY = mScrollY; 1104f54460576e88d7531b171575d37264dfe0a34f33Adam Powell dy = Math.max(0, Math.min(scrollY + dy, maxY)) - scrollY; 1105f54460576e88d7531b171575d37264dfe0a34f33Adam Powell 1106f54460576e88d7531b171575d37264dfe0a34f33Adam Powell mScroller.startScroll(mScrollX, scrollY, 0, dy); 1107df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 11089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mScroller.isFinished()) { 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.abortAnimation(); 1111ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 1112ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 1113ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 1114ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(dx, dy); 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastScroll = AnimationUtils.currentAnimationTimeMillis(); 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link #scrollTo}, but scroll smoothly instead of immediately. 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x the position where to scroll on the X axis 11259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y the position where to scroll on the Y axis 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollTo(int x, int y) { 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(x - mScrollX, y - mScrollY); 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The scroll range of a scroll view is the overall height of all of its 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children.</p> 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeVerticalScrollRange() { 1137a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int count = getChildCount(); 1138a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int contentHeight = getHeight() - mPaddingBottom - mPaddingTop; 11390b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (count == 0) { 1140a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell return contentHeight; 11410b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 11424e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1143637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int scrollRange = getChildAt(0).getBottom(); 1144637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollY = mScrollY; 1145637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overscrollBottom = Math.max(0, scrollRange - contentHeight); 1146637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (scrollY < 0) { 1147637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange -= scrollY; 1148637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (scrollY > overscrollBottom) { 1149637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange += scrollY - overscrollBottom; 1150637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1151637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1152637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return scrollRange; 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11550b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell @Override 11560b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell protected int computeVerticalScrollOffset() { 11570b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return Math.max(0, super.computeVerticalScrollOffset()); 11580b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChild(View child, int parentWidthMeasureSpec, int parentHeightMeasureSpec) { 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams lp = child.getLayoutParams(); 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthMeasureSpec; 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightMeasureSpec; 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, mPaddingLeft 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + mPaddingRight, lp.width); 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int parentHeightMeasureSpec, int heightUsed) { 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + widthUsed, lp.width); 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childHeightMeasureSpec = MeasureSpec.makeMeasureSpec( 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp.topMargin + lp.bottomMargin, MeasureSpec.UNSPECIFIED); 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void computeScroll() { 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScroller.computeScrollOffset()) { 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is called at drawing time by ViewGroup. We don't want to 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // re-show the scrollbars at this point, which scrollTo will do, 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so we replicate most of scrollTo here. 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 11969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's a little odd to call onScrollChanged from inside the drawing. 11979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 11989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It is, except when you remember that computeScroll() is used to 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // animate scrolling. So unless we want to defer the onScrollChanged() 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // until the end of the animated scrolling, we don't really have a 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // choice here. 12029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // I agree. The alternative, which I think would be worse, is to post 12049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // something and tell the subclasses later. This is bad because there 12059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // will be a window where mScrollX/Y is different from what the app 12069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // thinks it is. 12079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldX = mScrollX; 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldY = mScrollY; 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int x = mScroller.getCurrX(); 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int y = mScroller.getCurrY(); 121217dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell 1213637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (oldX != x || oldY != y) { 1214e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int range = getScrollRange(); 1215e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 1216e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 1217e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 1218e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1219e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio overScrollBy(x - oldX, y - oldY, oldX, oldY, 0, range, 1220637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 0, mOverflingDistance, false); 1221637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell onScrollChanged(mScrollX, mScrollY, oldX, oldY); 1222637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1223e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio if (canOverscroll) { 1224637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (y < 0 && oldY >= 0) { 1225637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowTop.onAbsorb((int) mScroller.getCurrVelocity()); 1226637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (y > range && oldY <= range) { 1227637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowBottom.onAbsorb((int) mScroller.getCurrVelocity()); 1228637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 12299d32d24dbd8a015c9d5c44ed4901d5a666eb8e7fAdam Powell } 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1231e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1232e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy if (!awakenScrollBars()) { 1233e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy // Keep on drawing until the animation has finished. 1234df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1235e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy } 1236ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } else { 1237ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 1238ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 1239ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 1240ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 12419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls the view to the given child. 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child the View to scroll to 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollToChild(View child) { 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getDrawingRect(mTempRect); 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Offset from child's local coordinates to ScrollView coordinates */ 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(child, mTempRect); 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta != 0) { 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(0, scrollDelta); 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If rect is off screen, scroll just enough to get it (or at least the 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * first screen size chunk of it) on screen. 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rectangle. 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param immediate True to scroll immediately without animation 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if scrolling was performed 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollToChildRect(Rect rect, boolean immediate) { 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int delta = computeScrollDeltaToGetChildRectOnScreen(rect); 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = delta != 0; 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (immediate) { 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(0, delta); 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(0, delta); 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 12819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Compute the amount to scroll in the Y direction in order to get 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a rectangle completely on the screen (or, if taller than the screen, 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least the first screen size chunk of it). 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rect. 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The scroll delta. 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) { 1292ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() == 0) return 0; 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int height = getHeight(); 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenTop = getScrollY(); 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenBottom = screenTop + height; 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdge = getVerticalFadingEdgeLength(); 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for top fading edge as long as rect isn't at very top 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.top > 0) { 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenTop += fadingEdge; 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for bottom fading edge as long as rect isn't at very bottom 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.bottom < getChildAt(0).getHeight()) { 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenBottom -= fadingEdge; 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollYDelta = 0; 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.bottom > screenBottom && rect.top > screenTop) { 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move down to get it in view: move down just enough so 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 13199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.top - screenTop); 13209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at bottom of screen 13229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta += (rect.bottom - screenBottom); 13239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our content 1326ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int bottom = getChildAt(0).getBottom(); 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToBottom = bottom - screenBottom; 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.min(scrollYDelta, distanceToBottom); 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.top < screenTop && rect.bottom < screenBottom) { 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move up to get it in view: move up just enough so that 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.height() > height) { 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (screenBottom - rect.bottom); 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at top 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta -= (screenTop - rect.top); 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the top our content 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollYDelta = Math.max(scrollYDelta, -getScrollY()); 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollYDelta; 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestChildFocus(View child, View focused) { 13512ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (!mIsLayoutDirty) { 13522ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne scrollToChild(focused); 13532ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne } else { 13542ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne // The child may not be laid out yet, we can't compute the scroll yet 13552ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne mChildToScrollTo = focused; 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestChildFocus(child, focused); 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When looking for focus in children of a scroll view, need to be a little 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * more careful not to give focus to something that is scrolled off screen. 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is more expensive than the default {@link android.view.ViewGroup} 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * implementation, otherwise this behavior might have been made the default. 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean onRequestFocusInDescendants(int direction, 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect previouslyFocusedRect) { 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // convert from forward / backward notation to up / down / left / right 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (ugh). 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_FORWARD) { 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_DOWN; 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == View.FOCUS_BACKWARD) { 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_UP; 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = previouslyFocusedRect == null ? 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocus(this, null, direction) : 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocusFromRect(this, 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect, direction); 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus == null) { 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isOffScreen(nextFocus)) { 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocus.requestFocus(direction, previouslyFocusedRect); 13944e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira } 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rectangle, 13989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean immediate) { 13999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset into coordinate space of this scroll view 14009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rectangle.offset(child.getLeft() - child.getScrollX(), 14019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getTop() - child.getScrollY()); 14029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollToChildRect(rectangle, immediate); 14049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestLayout() { 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = true; 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestLayout(); 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1413ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick protected void onDetachedFromWindow() { 1414ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick super.onDetachedFromWindow(); 1415ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1416ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mScrollStrictSpan != null) { 1417ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan.finish(); 1418ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = null; 1419ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1420ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan != null) { 1421ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan.finish(); 1422ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = null; 1423ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1424ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1425ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1426ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick @Override 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onLayout(boolean changed, int l, int t, int r, int b) { 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onLayout(changed, l, t, r, b); 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = false; 14304e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira // Give a child focus if it needs it 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChildToScrollTo != null && isViewDescendantOf(mChildToScrollTo, this)) { 14329c9573721140c260d4614c7ac58923dcfa0cea22Romain Guy scrollToChild(mChildToScrollTo); 14339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChildToScrollTo = null; 14359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1436f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa // Calling this with the present values causes it to re-claim them 14379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollTo(mScrollX, mScrollY); 14389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onSizeChanged(int w, int h, int oldw, int oldh) { 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onSizeChanged(w, h, oldw, oldh); 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (null == currentFocused || this == currentFocused) 14469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 14479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14487d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra // If the currently-focused view was visible on the screen when the 14497d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra // screen was at the old height, then scroll the screen to make that 14507d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra // view visible with the new screen height. 14517d4200d03fa55a13eda63f979dcf47792f0af31dJack Veenstra if (isWithinDeltaOfScreen(currentFocused, 0, oldh)) { 14529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused.getDrawingRect(mTempRect); 14539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocused, mTempRect); 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollY(scrollDelta); 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14574e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira } 14589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1460f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa * Return true if child is a descendant of parent, (or equal to the parent). 14619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1462e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static boolean isViewDescendantOf(View child, View parent) { 14639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 14649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 14659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 14689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewDescendantOf((View) theParent, parent); 14694e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira } 14709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fling the scroll view 14739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 14749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param velocityY The initial velocity in the Y direction. Positive 147552964243dc95f74ac2ab9a96d031a36931a11931Gilles Debunne * numbers mean that the finger/cursor is moving down the screen, 14769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * which means we want to scroll towards the top. 14779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void fling(int velocityY) { 1479ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 1480ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int height = getHeight() - mPaddingBottom - mPaddingTop; 1481ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int bottom = getChildAt(0).getHeight(); 14824e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 14834e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira mScroller.fling(mScrollX, mScrollY, 0, velocityY, 0, 0, 0, 1484637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Math.max(0, bottom - height), 0, height/2); 14854e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1486ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mFlingStrictSpan == null) { 1487ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mFlingStrictSpan = StrictMode.enterCriticalSpan("ScrollView-fling"); 1488ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1489ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1490df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 14919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1494ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick private void endDrag() { 1495ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mIsBeingDragged = false; 1496ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 149713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 1498ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1499ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mEdgeGlowTop != null) { 1500ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mEdgeGlowTop.onRelease(); 1501ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mEdgeGlowBottom.onRelease(); 1502ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1503ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 1504ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick if (mScrollStrictSpan != null) { 1505ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan.finish(); 1506ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick mScrollStrictSpan = null; 1507ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1508ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick } 1509ce81f3a955a0e77e44e1f76c976905ec2a52c1d0Brad Fitzpatrick 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 15129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 15139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>This version also clamps the scrolling to the bounds of our child. 15149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 151552964243dc95f74ac2ab9a96d031a36931a11931Gilles Debunne @Override 15169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void scrollTo(int x, int y) { 15179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we rely on the fact the View.scrollBy calls scrollTo. 15189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 15199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 15209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project x = clamp(x, getWidth() - mPaddingRight - mPaddingLeft, child.getWidth()); 15219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project y = clamp(y, getHeight() - mPaddingBottom - mPaddingTop, child.getHeight()); 15229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x != mScrollX || y != mScrollY) { 15239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.scrollTo(x, y); 15249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1525637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1526637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1527637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1528637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1529637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverScrollMode(int mode) { 1530637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mode != OVER_SCROLL_NEVER) { 1531637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop == null) { 15324e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira Context context = getContext(); 153389935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowTop = new EdgeEffect(context); 153489935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowBottom = new EdgeEffect(context); 1535637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1536637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 1537637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowTop = null; 1538637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowBottom = null; 1539637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1540637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.setOverScrollMode(mode); 1541637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1542637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1543637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1544637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void draw(Canvas canvas) { 1545637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.draw(canvas); 1546637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop != null) { 1547637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollY = mScrollY; 1548637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowTop.isFinished()) { 1549637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 15507d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int width = getWidth() - mPaddingLeft - mPaddingRight; 1551637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 15527d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(mPaddingLeft, Math.min(0, scrollY)); 1553b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira mEdgeGlowTop.setSize(width, getHeight()); 1554637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowTop.draw(canvas)) { 1555df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1556637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1557637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1558637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1559637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowBottom.isFinished()) { 1560637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 15617d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int width = getWidth() - mPaddingLeft - mPaddingRight; 1562637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int height = getHeight(); 1563637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 15647d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(-width + mPaddingLeft, 15657d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell Math.max(getScrollRange(), scrollY) + height); 1566637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(180, width, 0); 1567b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira mEdgeGlowBottom.setSize(width, height); 1568637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowBottom.draw(canvas)) { 1569df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1570637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1571637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1572637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 15739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1576e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static int clamp(int n, int my, int child) { 15779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (my >= child || n < 0) { 15789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* my >= child is this case: 15799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |--------------- me ---------------| 15809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 15819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or 15829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |--------------- me ---------------| 15839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 15849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or 15859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |--------------- me ---------------| 15869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 15879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 15889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * n < 0 is this case: 15899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ me ------| 15909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |-------- child --------| 15919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |-- mScrollX --| 15929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 15939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 15949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((my+n) > child) { 15969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* this case: 15979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ me ------| 15989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |------ child ------| 15999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * |-- mScrollX --| 16009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 16019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child-my; 16029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return n; 16049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1606