HorizontalScrollView.java revision 2ed2eacd7e0569675410f1e62238b708c5dcc8ac
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2009 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 19637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport com.android.internal.R; 20637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 212ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.content.Context; 222ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.content.res.Resources; 232ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.content.res.TypedArray; 24637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Canvas; 25637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Rect; 26637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.drawable.Drawable; 272ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.util.AttributeSet; 282ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.FocusFinder; 292ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.KeyEvent; 302ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.MotionEvent; 31637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.view.VelocityTracker; 322ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.View; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewConfiguration; 342ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.ViewDebug; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.animation.AnimationUtils; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.List; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout container for a view hierarchy that can be scrolled by the user, 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * allowing it to be larger than the physical display. A HorizontalScrollView 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link FrameLayout}, meaning you should place one child in it 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * containing the entire contents to scroll; this child may itself be a layout 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manager with a complex hierarchy of objects. A child that is often used 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link LinearLayout} in a horizontal orientation, presenting a horizontal 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * array of top-level items that the user can scroll through. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>You should never use a HorizontalScrollView with a {@link ListView}, since 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * ListView takes care of its own scrolling. Most importantly, doing this 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * defeats all of the important optimizations in ListView for dealing with 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * large lists, since it effectively forces the ListView to display its entire 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * list of items to fill up the infinite container supplied by HorizontalScrollView. 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The {@link TextView} class also 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * takes care of its own scrolling, so does not require a ScrollView, but 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * using the two together is possible to achieve the effect of a text view 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within a larger container. 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>HorizontalScrollView only supports horizontal scrolling. 624e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 634e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class HorizontalScrollView extends FrameLayout { 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int ANIMATED_SCROLL_GAP = ScrollView.ANIMATED_SCROLL_GAP; 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final float MAX_SCROLL_FACTOR = ScrollView.MAX_SCROLL_FACTOR; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long mLastScroll; 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final Rect mTempRect = new Rect(); 74637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private OverScroller mScroller; 75637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private EdgeGlow mEdgeGlowLeft; 76637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private EdgeGlow mEdgeGlowRight; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Position of the last motion event. 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mLastMotionX; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True when the layout has changed but the traversal has not come through yet. 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Ideally the view hierarchy would keep track of this for us. 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsLayoutDirty = true; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The child to give focus to in the event that a child has requested focus while the 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout is dirty. This prevents the scroll from being wrong if the child has not been 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * laid out before requesting focus. 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mChildToScrollTo = null; 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True if the user is currently dragging this ScrollView around. This is 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not the same as 'is being flinged', which can be checked by 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mScroller.isFinished() (flinging begins when the user lifts his finger). 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsBeingDragged = false; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determines speed during touch scrolling 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private VelocityTracker mVelocityTracker; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When set to true, the scroll view measure its child to make it fill the currently 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible area. 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 112a174d7a0d5475dbae2b48f7359abf1637a882896Romain Guy @ViewDebug.ExportedProperty(category = "layout") 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mFillViewport; 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether arrow scrolling is animated. 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mSmoothScrollingEnabled = true; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mTouchSlop; 1214296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMinimumVelocity; 1224296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMaximumVelocity; 1234e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 124637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverscrollDistance; 125637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverflingDistance; 126637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1274cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell /** 1284cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * ID of the active pointer. This is used to retain consistency during 1294cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * drags/flings if multiple pointers are used. 1304cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell */ 1314cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private int mActivePointerId = INVALID_POINTER; 1324e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1334cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell /** 1344cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * Sentinel value for no current active pointer. 1354cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * Used by {@link #mActivePointerId}. 1364cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell */ 1374cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private static final int INVALID_POINTER = -1; 1384e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context) { 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context, AttributeSet attrs) { 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.horizontalScrollViewStyle); 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context, AttributeSet attrs, int defStyle) { 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project initScrollView(); 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = context.obtainStyledAttributes(attrs, 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project android.R.styleable.HorizontalScrollView, defStyle, 0); 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFillViewport(a.getBoolean(android.R.styleable.HorizontalScrollView_fillViewport, false)); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getLeftFadingEdgeStrength() { 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getHorizontalFadingEdgeLength(); 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScrollX < length) { 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mScrollX / (float) length; 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getRightFadingEdgeStrength() { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getHorizontalFadingEdgeLength(); 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int rightEdge = getWidth() - mPaddingRight; 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int span = getChildAt(0).getRight() - mScrollX - rightEdge; 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (span < length) { 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return span / (float) length; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount this scroll view will scroll in response to 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mRight - mLeft)); 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void initScrollView() { 199637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller = new OverScroller(getContext()); 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFocusable(true); 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setWillNotDraw(false); 2034296fc4d326447875c26a925f12b3935632f13bbRomain Guy final ViewConfiguration configuration = ViewConfiguration.get(mContext); 2044296fc4d326447875c26a925f12b3935632f13bbRomain Guy mTouchSlop = configuration.getScaledTouchSlop(); 2054296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMinimumVelocity = configuration.getScaledMinimumFlingVelocity(); 2064296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 207637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance = configuration.getScaledOverscrollDistance(); 208637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance = configuration.getScaledOverflingDistance(); 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child) { 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child); 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index) { 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index); 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, ViewGroup.LayoutParams params) { 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, params); 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index, ViewGroup.LayoutParams params) { 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index, params); 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns true this HorizontalScrollView can be scrolled 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean canScroll() { 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidth = child.getWidth(); 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getWidth() < childWidth + mPaddingLeft + mPaddingRight ; 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 260fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * Indicates whether this HorizontalScrollView's content is stretched to 261fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * fill the viewport. 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if the content fills the viewport, false otherwise. 264fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * 265fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isFillViewport() { 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFillViewport; 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 272fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * Indicates this HorizontalScrollView whether it should stretch its content width 273fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * to fill the viewport or not. 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fillViewport True to stretch the content's width to the viewport's 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * boundaries, false otherwise. 2774e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 278fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFillViewport(boolean fillViewport) { 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fillViewport != mFillViewport) { 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFillViewport = fillViewport; 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether arrow scrolling will animate its transition. 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSmoothScrollingEnabled() { 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSmoothScrollingEnabled; 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set whether arrow scrolling will animate its transition. 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param smoothScrollingEnabled whether arrow scrolling will animate its transition 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSmoothScrollingEnabled(boolean smoothScrollingEnabled) { 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSmoothScrollingEnabled = smoothScrollingEnabled; 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mFillViewport) { 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (widthMode == MeasureSpec.UNSPECIFIED) { 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 315ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 316ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final View child = getChildAt(0); 317ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int width = getMeasuredWidth(); 318ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (child.getMeasuredWidth() < width) { 319ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final FrameLayout.LayoutParams lp = (LayoutParams) child.getLayoutParams(); 3204e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 321ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec, mPaddingTop 322ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy + mPaddingBottom, lp.height); 323ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy width -= mPaddingLeft; 324ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy width -= mPaddingRight; 325ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 3264e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 327ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 328ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Let the focused view and/or our descendants get the key first 3358e618e54ef0f009cac15972af9d9a72d6f6b6f94Romain Guy return super.dispatchKeyEvent(event) || executeKeyEvent(event); 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You can call this function yourself to have the scroll view perform 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling from a key event, just as if the event had been dispatched to 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it by the view hierarchy. 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param event The key event to execute. 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Return true if the event was handled, else false. 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean executeKeyEvent(KeyEvent event) { 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.setEmpty(); 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!canScroll()) { 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFocused()) { 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused, View.FOCUS_RIGHT); 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocused != null && nextFocused != this && 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(View.FOCUS_RIGHT); 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (event.getAction() == KeyEvent.ACTION_DOWN) { 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (event.getKeyCode()) { 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_LEFT); 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_LEFT); 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_RIGHT); 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_RIGHT); 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pageScroll(event.isShiftPressed() ? View.FOCUS_LEFT : View.FOCUS_RIGHT); 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3874cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private boolean inChild(int x, int y) { 3884cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (getChildCount() > 0) { 389352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell final int scrollX = mScrollX; 3904cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final View child = getChildAt(0); 3914cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell return !(y < child.getTop() 3924cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell || y >= child.getBottom() 393352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || x < child.getLeft() - scrollX 394352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || x >= child.getRight() - scrollX); 3954cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 3964cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell return false; 3974cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 3984e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onInterceptTouchEvent(MotionEvent ev) { 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This method JUST determines whether we want to intercept the motion. 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If we return true, onMotionEvent will be called and we do the actual 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling there. 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Shortcut the most recurring case: the user is in the dragging 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * state and he is moving his finger. We want to intercept this 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * motion. 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((action == MotionEvent.ACTION_MOVE) && (mIsBeingDragged)) { 4149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4174cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell switch (action & MotionEvent.ACTION_MASK) { 4184cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_MOVE: { 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether the user has moved far enough from his original down touch. 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Locally do absolute value. mLastMotionX is set to the x value 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the down event. 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4289d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int activePointerId = mActivePointerId; 4299d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell if (activePointerId == INVALID_POINTER) { 4309d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell // If we don't have a valid id, the touch down wasn't on content. 4319d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell break; 4329d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell } 4339d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell 4349d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int pointerIndex = ev.findPointerIndex(activePointerId); 4354cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final float x = ev.getX(pointerIndex); 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int xDiff = (int) Math.abs(x - mLastMotionX); 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (xDiff > mTouchSlop) { 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = true; 4394cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mLastMotionX = x; 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mParent != null) mParent.requestDisallowInterceptTouchEvent(true); 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4434cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4454cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_DOWN: { 4464cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final float x = ev.getX(); 4474cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (!inChild((int) x, (int) ev.getY())) { 4484cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mIsBeingDragged = false; 4494cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 4504cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4514e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 4524cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell /* 4534cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * Remember location of down touch. 4544cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * ACTION_DOWN always refers to pointer index 0. 4554cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell */ 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastMotionX = x; 4574cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = ev.getPointerId(0); 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If being flinged and user touches the screen, initiate drag; 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * otherwise don't. mScroller.isFinished should be false when 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being flinged. 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = !mScroller.isFinished(); 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4664cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_CANCEL: 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Release the drag */ 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = false; 4724cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = INVALID_POINTER; 473637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) { 474637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 475637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 4764cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 4774cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_POINTER_UP: 4784cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell onSecondaryPointerUp(ev); 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The only time we want to intercept motion events is if we are in the 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drag mode. 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mIsBeingDragged; 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent ev) { 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) { 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't handle edge touches immediately -- they may actually belong to one of our 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // descendants. 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mVelocityTracker == null) { 4999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mVelocityTracker = VelocityTracker.obtain(); 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mVelocityTracker.addMovement(ev); 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5054cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell switch (action & MotionEvent.ACTION_MASK) { 5064cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_DOWN: { 507fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown mIsBeingDragged = getChildCount() != 0; 508fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown if (!mIsBeingDragged) { 509fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown return false; 510fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown } 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 512352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell /* 513352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * If being flinged and user touches, stop the fling. isFinished 514352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * will be false if being flinged. 515352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell */ 516352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (!mScroller.isFinished()) { 517352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mScroller.abortAnimation(); 518352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 519352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember where the motion event started 521fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown mLastMotionX = ev.getX(); 522352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = ev.getPointerId(0); 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5244cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_MOVE: 5264cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mIsBeingDragged) { 5274cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // Scroll to follow the motion event 5284cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int activePointerIndex = ev.findPointerIndex(mActivePointerId); 5294cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final float x = ev.getX(activePointerIndex); 5304cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int deltaX = (int) (mLastMotionX - x); 5314cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mLastMotionX = x; 5324cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell 533637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldX = mScrollX; 534637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldY = mScrollY; 535637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int range = getScrollRange(); 536637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (overScrollBy(deltaX, 0, mScrollX, 0, range, 0, 537637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance, 0, true)) { 538637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Break our velocity if we hit a scroll barrier. 539637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mVelocityTracker.clear(); 540637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 541637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell onScrollChanged(mScrollX, mScrollY, oldX, oldY); 542637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 543637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overscrollMode = getOverScrollMode(); 544637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (overscrollMode == OVER_SCROLL_ALWAYS || 545637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0)) { 546637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int pulledToX = oldX + deltaX; 547637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (pulledToX < 0) { 548637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onPull((float) deltaX / getWidth()); 549637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowRight.isFinished()) { 550637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 551637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 552637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (pulledToX > range) { 553637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onPull((float) deltaX / getWidth()); 554637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowLeft.isFinished()) { 555637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 556637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 557637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 558637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null 559637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell && (!mEdgeGlowLeft.isFinished() || !mEdgeGlowRight.isFinished())) { 560637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 561637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 562637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 5634cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 5664cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mIsBeingDragged) { 5674cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final VelocityTracker velocityTracker = mVelocityTracker; 5684cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 5694cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell int initialVelocity = (int) velocityTracker.getXVelocity(mActivePointerId); 5704cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell 571637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (getChildCount() > 0) { 572637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if ((Math.abs(initialVelocity) > mMinimumVelocity)) { 573637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell fling(-initialVelocity); 574637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 575637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int right = getScrollRange(); 576637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, right, 0, 0)) { 577637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 578637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 579637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 58017dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell } 5814e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 5824cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = INVALID_POINTER; 5834cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mIsBeingDragged = false; 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5854cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mVelocityTracker != null) { 5864cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mVelocityTracker.recycle(); 5874cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mVelocityTracker = null; 5884cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 589637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 590637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 591637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 592637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5944cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 595352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell case MotionEvent.ACTION_CANCEL: 596352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (mIsBeingDragged && getChildCount() > 0) { 597637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) { 598637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 599637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 600352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = INVALID_POINTER; 601352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mIsBeingDragged = false; 602352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (mVelocityTracker != null) { 603352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mVelocityTracker.recycle(); 604352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mVelocityTracker = null; 605352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 606637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 607637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 608637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 609637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 610352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 611352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell break; 6124cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_POINTER_UP: 6134cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell onSecondaryPointerUp(ev); 6144cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6184e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 6194cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private void onSecondaryPointerUp(MotionEvent ev) { 6204cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 6214cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell MotionEvent.ACTION_POINTER_INDEX_SHIFT; 6224cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int pointerId = ev.getPointerId(pointerIndex); 6234cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (pointerId == mActivePointerId) { 6244cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // This was our active pointer going up. Choose a new 6254cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // active pointer and adjust accordingly. 6264cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // TODO: Make this decision more intelligent. 6274cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 6284cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mLastMotionX = ev.getX(newPointerIndex); 6294cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = ev.getPointerId(newPointerIndex); 6304cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mVelocityTracker != null) { 6314cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mVelocityTracker.clear(); 6324cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6334cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6344cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6354e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 636637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 637637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell protected void onOverScrolled(int scrollX, int scrollY, 638637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell boolean clampedX, boolean clampedY) { 639637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Treat animating scrolls differently; see #computeScroll() for why. 640637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mScroller.isFinished()) { 641637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollX = scrollX; 642637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollY = scrollY; 6430fd89bf7221431260883cee4597e2db942d799a0Romain Guy invalidateParentIfNeeded(); 644637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (clampedX) { 645637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0); 646637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 647637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 648637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.scrollTo(scrollX, scrollY); 649637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 650637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell awakenScrollBars(); 651637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 652637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 6530b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell private int getScrollRange() { 6540b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell int scrollRange = 0; 6550b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (getChildCount() > 0) { 6560b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell View child = getChildAt(0); 6570b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell scrollRange = Math.max(0, 658637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell child.getWidth() - (getWidth() - mPaddingLeft - mPaddingRight)); 6590b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 6600b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return scrollRange; 6610b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 6659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in this View's bounds 6669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (excluding fading edges) pretending that this View's left is located at 6679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the parameter left. 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param leftFocus look for a candidate is the one at the left of the bounds 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if leftFocus is true, or at the right of the bounds if leftFocus 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is false 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the bounds in which a focusable must be 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found (the fading edge is assumed to start at this position) 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param preferredFocusable the View that has highest priority and will be 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returned if it is within my bounds (null is valid) 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can be found 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInMyBounds(final boolean leftFocus, 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int left, View preferredFocusable) { 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The fading edge's transparent side should be considered for focus 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * since it's mostly visible, so we divide the actual fading edge length 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * by 2. 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int fadingEdgeLength = getHorizontalFadingEdgeLength() / 2; 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int leftWithoutFadingEdge = left + fadingEdgeLength; 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int rightWithoutFadingEdge = left + getWidth() - fadingEdgeLength; 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((preferredFocusable != null) 6919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (preferredFocusable.getLeft() < rightWithoutFadingEdge) 6929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (preferredFocusable.getRight() > leftWithoutFadingEdge)) { 6939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return preferredFocusable; 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return findFocusableViewInBounds(leftFocus, leftWithoutFadingEdge, 6979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rightWithoutFadingEdge); 6989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in the specified bounds. 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param leftFocus look for a candidate is the one at the left of the bounds 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if leftFocus is true, or at the right of the bounds if 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * leftFocus is false 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the bounds in which a focusable must be 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found 7109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param right the right offset of the bounds in which a focusable must 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInBounds(boolean leftFocus, int left, int right) { 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project List<View> focusables = getFocusables(View.FOCUS_FORWARD); 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusCandidate = null; 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A fully contained focusable is one where its left is below the bound's 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * left, and its right is above the bound's right. A partially 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained focusable is one where some part of it is within the 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds, but it also has some part that is not within bounds. A fully contained 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusable is preferred to a partially contained focusable. 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean foundFullyContainedFocusable = false; 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = focusables.size(); 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = focusables.get(i); 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewLeft = view.getLeft(); 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewRight = view.getRight(); 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (left < viewRight && viewLeft < right) { 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the focusable is in the target area, it is a candidate for 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusing 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsFullyContained = (left < viewLeft) && 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewRight < right); 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusCandidate == null) { 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* No candidate, take this one */ 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = viewIsFullyContained; 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsCloserToBoundary = 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (leftFocus && viewLeft < focusCandidate.getLeft()) || 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (!leftFocus && viewRight > focusCandidate.getRight()); 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (foundFullyContainedFocusable) { 7549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained && viewIsCloserToBoundary) { 7559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 7569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We're dealing with only fully contained views, so 7579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it has to be closer to the boundary to beat our 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * candidate 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 7619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained) { 7649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Any fully contained view beats a partially contained view */ 7659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 7669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = true; 7679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (viewIsCloserToBoundary) { 7689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 7699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Partially contained view beats another partially 7709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained view if it's closer 7719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 7739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return focusCandidate; 7809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "page up/down" shortcut press. This 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view by one page left or right and give the focus 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the leftmost/rightmost component in the new visible area. If no 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 7879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 7909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page left or {@link android.view.View#FOCUS_RIGHT} 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page right 7929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean pageScroll(int direction) { 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean right = direction == View.FOCUS_RIGHT; 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (right) { 7999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = getScrollX() + width; 8009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 8019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 802ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View view = getChildAt(0); 8039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.left + width > view.getRight()) { 8049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = view.getRight() - width; 8059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = getScrollX() - width; 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.left < 0) { 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = 0; 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = mTempRect.left + width; 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.left, mTempRect.right); 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "home/end" shortcut press. This 8209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view to the left or right and give the focus 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the leftmost/rightmost component in the new visible area. If no 8229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 8239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the left of the view or {@link android.view.View#FOCUS_RIGHT} 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the right 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean fullScroll(int direction) { 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean right = direction == View.FOCUS_RIGHT; 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = 0; 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = width; 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (right) { 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 840ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View view = getChildAt(0); 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = view.getRight(); 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = mTempRect.right - width; 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.left, mTempRect.right); 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Scrolls the view to make the area defined by <code>left</code> and 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <code>right</code> visible. This method attempts to give the focus 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to a component visible in this area. If no component can be focused in 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the new visible area, the focus is reclaimed by this scrollview.</p> 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go left {@link android.view.View#FOCUS_RIGHT} to right 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the new area to be made visible 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param right the right offset of the new area to be made visible 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollAndFocus(int direction, int left, int right) { 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = true; 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerLeft = getScrollX(); 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerRight = containerLeft + width; 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean goLeft = direction == View.FOCUS_LEFT; 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocused = findFocusableViewInBounds(goLeft, left, right); 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocused == null) { 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocused = this; 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (left >= containerLeft && right <= containerRight) { 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = false; 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = goLeft ? (left - containerLeft) : (right - containerRight); 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(delta); 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8812ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != findFocus()) newFocused.requestFocus(direction); 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle scrolling in response to a left or right arrow click. 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction The direction corresponding to the arrow key that was 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pressed 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if we consumed the event, false otherwise 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean arrowScroll(int direction) { 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, direction); 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = getMaxScrollAmount(); 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocused != null && isWithinDeltaOfScreen(nextFocused, maxJump)) { 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.getDrawingRect(mTempRect); 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(nextFocused, mTempRect); 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(scrollDelta); 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(direction); 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no new focus 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = maxJump; 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_LEFT && getScrollX() < scrollDelta) { 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = getScrollX(); 914ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } else if (direction == View.FOCUS_RIGHT && getChildCount() > 0) { 9154e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 916ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int daRight = getChildAt(0).getRight(); 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenRight = getScrollX() + getWidth(); 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (daRight - screenRight < maxJump) { 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = daRight - screenRight; 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta == 0) { 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(direction == View.FOCUS_RIGHT ? scrollDelta : -scrollDelta); 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused != null && currentFocused.isFocused() 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && isOffScreen(currentFocused)) { 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // previously focused item still has focus and is off screen, give 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it up (take it back to ourselves) 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (also, need to temporarily force FOCUS_BEFORE_DESCENDANTS so we are 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // sure to 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get it) 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int descendantFocusability = getDescendantFocusability(); // save 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS); 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestFocus(); 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(descendantFocusability); // restore 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is scrolled off 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * screen. 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isOffScreen(View descendant) { 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return !isWithinDeltaOfScreen(descendant, 0); 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is within delta 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixels of being on the screen. 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isWithinDeltaOfScreen(View descendant, int delta) { 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mTempRect.right + delta) >= getScrollX() 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (mTempRect.left - delta) <= (getScrollX() + getWidth()); 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Smooth scroll by a X delta 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta the number of pixels to scroll by on the X axis 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void doScrollX(int delta) { 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSmoothScrollingEnabled) { 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(delta, 0); 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(delta, 0); 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link View#scrollBy}, but scroll smoothly instead of immediately. 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dx the number of pixels to scroll by on the X axis 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dy the number of pixels to scroll by on the Y axis 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollBy(int dx, int dy) { 9873fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell if (getChildCount() == 0) { 9883fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell // Nothing to do. 9893fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell return; 9903fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell } 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll; 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (duration > ANIMATED_SCROLL_GAP) { 993f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int width = getWidth() - mPaddingRight - mPaddingLeft; 994f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int right = getChildAt(0).getWidth(); 995f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int maxX = Math.max(0, right - width); 996f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int scrollX = mScrollX; 997f54460576e88d7531b171575d37264dfe0a34f33Adam Powell dx = Math.max(0, Math.min(scrollX + dx, maxX)) - scrollX; 998f54460576e88d7531b171575d37264dfe0a34f33Adam Powell 999f54460576e88d7531b171575d37264dfe0a34f33Adam Powell mScroller.startScroll(scrollX, mScrollY, dx, 0); 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mScroller.isFinished()) { 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.abortAnimation(); 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(dx, dy); 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastScroll = AnimationUtils.currentAnimationTimeMillis(); 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link #scrollTo}, but scroll smoothly instead of immediately. 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x the position where to scroll on the X axis 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y the position where to scroll on the Y axis 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollTo(int x, int y) { 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(x - mScrollX, y - mScrollY); 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The scroll range of a scroll view is the overall width of all of its 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children.</p> 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollRange() { 1026a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int count = getChildCount(); 1027a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int contentWidth = getWidth() - mPaddingLeft - mPaddingRight; 10280b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (count == 0) { 1029a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell return contentWidth; 10300b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 10314e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1032637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int scrollRange = getChildAt(0).getRight(); 1033637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollX = mScrollX; 1034637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overscrollRight = Math.max(0, scrollRange - contentWidth); 1035637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (scrollX < 0) { 1036637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange -= scrollX; 1037637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (scrollX > overscrollRight) { 1038637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange += scrollX - overscrollRight; 1039637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1040637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1041637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return scrollRange; 10420b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 10434e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 10440b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell @Override 10450b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell protected int computeHorizontalScrollOffset() { 10460b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return Math.max(0, super.computeHorizontalScrollOffset()); 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChild(View child, int parentWidthMeasureSpec, int parentHeightMeasureSpec) { 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams lp = child.getLayoutParams(); 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthMeasureSpec; 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightMeasureSpec; 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, mPaddingTop 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + mPaddingBottom, lp.height); 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int parentHeightMeasureSpec, int heightUsed) { 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + heightUsed, lp.height); 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec( 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp.leftMargin + lp.rightMargin, MeasureSpec.UNSPECIFIED); 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void computeScroll() { 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScroller.computeScrollOffset()) { 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is called at drawing time by ViewGroup. We don't want to 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // re-show the scrollbars at this point, which scrollTo will do, 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so we replicate most of scrollTo here. 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's a little odd to call onScrollChanged from inside the drawing. 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It is, except when you remember that computeScroll() is used to 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // animate scrolling. So unless we want to defer the onScrollChanged() 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // until the end of the animated scrolling, we don't really have a 10909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // choice here. 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // I agree. The alternative, which I think would be worse, is to post 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // something and tell the subclasses later. This is bad because there 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // will be a window where mScrollX/Y is different from what the app 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // thinks it is. 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldX = mScrollX; 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldY = mScrollY; 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int x = mScroller.getCurrX(); 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int y = mScroller.getCurrY(); 110117dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell 1102637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (oldX != x || oldY != y) { 1103637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell overScrollBy(x - oldX, y - oldY, oldX, oldY, getScrollRange(), 0, 1104637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance, 0, false); 1105637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell onScrollChanged(mScrollX, mScrollY, oldX, oldY); 1106637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1107637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int range = getScrollRange(); 1108637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overscrollMode = getOverScrollMode(); 1109637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (overscrollMode == OVER_SCROLL_ALWAYS || 1110637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0)) { 1111637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (x < 0 && oldX >= 0) { 1112637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onAbsorb((int) mScroller.getCurrVelocity()); 1113637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (x > range && oldX <= range) { 1114637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onAbsorb((int) mScroller.getCurrVelocity()); 1115637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 11169d32d24dbd8a015c9d5c44ed4901d5a666eb8e7fAdam Powell } 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1118a0d645cb6980113a624e6e70a7fa9ae5e91bbac8Adam Powell awakenScrollBars(); 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Keep on drawing until the animation has finished. 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postInvalidate(); 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls the view to the given child. 11279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child the View to scroll to 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollToChild(View child) { 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getDrawingRect(mTempRect); 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Offset from child's local coordinates to ScrollView coordinates */ 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(child, mTempRect); 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta != 0) { 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(scrollDelta, 0); 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If rect is off screen, scroll just enough to get it (or at least the 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * first screen size chunk of it) on screen. 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rectangle. 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param immediate True to scroll immediately without animation 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if scrolling was performed 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollToChildRect(Rect rect, boolean immediate) { 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int delta = computeScrollDeltaToGetChildRectOnScreen(rect); 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = delta != 0; 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (immediate) { 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(delta, 0); 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(delta, 0); 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Compute the amount to scroll in the X direction in order to get 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a rectangle completely on the screen (or, if taller than the screen, 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least the first screen size chunk of it). 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rect. 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The scroll delta. 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) { 1173ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() == 0) return 0; 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenLeft = getScrollX(); 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenRight = screenLeft + width; 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdge = getHorizontalFadingEdgeLength(); 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for left fading edge as long as rect isn't at very left 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.left > 0) { 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenLeft += fadingEdge; 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for right fading edge as long as rect isn't at very right 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.right < getChildAt(0).getWidth()) { 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenRight -= fadingEdge; 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollXDelta = 0; 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.right > screenRight && rect.left > screenLeft) { 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move right to get it in view: move right just enough so 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 11969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 11979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.width() > width) { 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta += (rect.left - screenLeft); 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at right of screen 12039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta += (rect.right - screenRight); 12049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our content 1207ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int right = getChildAt(0).getRight(); 12089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToRight = right - screenRight; 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta = Math.min(scrollXDelta, distanceToRight); 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.left < screenLeft && rect.right < screenRight) { 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move right to get it in view: move right just enough so that 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 12159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.width() > width) { 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta -= (screenRight - rect.right); 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at left 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta -= (screenLeft - rect.left); 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the left our content 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta = Math.max(scrollXDelta, -getScrollX()); 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollXDelta; 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestChildFocus(View child, View focused) { 12322ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (!mIsLayoutDirty) { 12332ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne scrollToChild(focused); 12342ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne } else { 12352ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne // The child may not be laid out yet, we can't compute the scroll yet 12362ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne mChildToScrollTo = focused; 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestChildFocus(child, focused); 12399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When looking for focus in children of a scroll view, need to be a little 12449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * more careful not to give focus to something that is scrolled off screen. 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is more expensive than the default {@link android.view.ViewGroup} 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * implementation, otherwise this behavior might have been made the default. 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean onRequestFocusInDescendants(int direction, 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect previouslyFocusedRect) { 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // convert from forward / backward notation to up / down / left / right 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (ugh). 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_FORWARD) { 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_RIGHT; 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == View.FOCUS_BACKWARD) { 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_LEFT; 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = previouslyFocusedRect == null ? 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocus(this, null, direction) : 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocusFromRect(this, 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect, direction); 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus == null) { 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isOffScreen(nextFocus)) { 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocus.requestFocus(direction, previouslyFocusedRect); 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rectangle, 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean immediate) { 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset into coordinate space of this scroll view 12819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rectangle.offset(child.getLeft() - child.getScrollX(), 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getTop() - child.getScrollY()); 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollToChildRect(rectangle, immediate); 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestLayout() { 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = true; 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestLayout(); 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onLayout(boolean changed, int l, int t, int r, int b) { 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onLayout(changed, l, t, r, b); 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = false; 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Give a child focus if it needs it 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChildToScrollTo != null && isViewDescendantOf(mChildToScrollTo, this)) { 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollToChild(mChildToScrollTo); 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChildToScrollTo = null; 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Calling this with the present values causes it to re-clam them 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollTo(mScrollX, mScrollY); 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onSizeChanged(int w, int h, int oldw, int oldh) { 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onSizeChanged(w, h, oldw, oldh); 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (null == currentFocused || this == currentFocused) 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = mRight - mLeft; 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isWithinDeltaOfScreen(currentFocused, maxJump)) { 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused.getDrawingRect(mTempRect); 13199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocused, mTempRect); 13209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 13219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(scrollDelta); 13229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Return true if child is an descendant of parent, (or equal to the parent). 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isViewDescendantOf(View child, View parent) { 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewDescendantOf((View) theParent, parent); 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fling the scroll view 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param velocityX The initial velocity in the X direction. Positive 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * numbers mean that the finger/curor is moving down the screen, 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * which means we want to scroll towards the left. 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void fling(int velocityX) { 1345ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 1346ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int width = getWidth() - mPaddingRight - mPaddingLeft; 1347ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int right = getChildAt(0).getWidth(); 13484e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 13494e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira mScroller.fling(mScrollX, mScrollY, velocityX, 0, 0, 1350637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Math.max(0, right - width), 0, 0, width/2, 0); 13514e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1352ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final boolean movingRight = velocityX > 0; 13534e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 13542ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne View currentFocused = findFocus(); 1355ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View newFocused = findFocusableViewInMyBounds(movingRight, 13562ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne mScroller.getFinalX(), currentFocused); 13574e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1358ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (newFocused == null) { 1359ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy newFocused = this; 1360ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 13614e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 13622ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != currentFocused) { 13632ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne newFocused.requestFocus(movingRight ? View.FOCUS_RIGHT : View.FOCUS_LEFT); 1364ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 13654e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1366ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy invalidate(); 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>This version also clamps the scrolling to the bounds of our child. 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13752ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne @Override 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void scrollTo(int x, int y) { 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we rely on the fact the View.scrollBy calls scrollTo. 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project x = clamp(x, getWidth() - mPaddingRight - mPaddingLeft, child.getWidth()); 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project y = clamp(y, getHeight() - mPaddingBottom - mPaddingTop, child.getHeight()); 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x != mScrollX || y != mScrollY) { 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.scrollTo(x, y); 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1388637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1389637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverScrollMode(int mode) { 1390637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mode != OVER_SCROLL_NEVER) { 1391637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft == null) { 13924e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira Context context = getContext(); 13934e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira final Resources res = context.getResources(); 1394637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable edge = res.getDrawable(R.drawable.overscroll_edge); 1395637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final Drawable glow = res.getDrawable(R.drawable.overscroll_glow); 13964e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira mEdgeGlowLeft = new EdgeGlow(context, edge, glow); 13974e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira mEdgeGlowRight = new EdgeGlow(context, edge, glow); 1398637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1399637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 1400637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft = null; 1401637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight = null; 1402637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1403637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.setOverScrollMode(mode); 1404637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1405637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1406637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1407637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void draw(Canvas canvas) { 1408637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.draw(canvas); 1409637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 1410637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollX = mScrollX; 1411637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowLeft.isFinished()) { 1412637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 14137d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int height = getHeight() - mPaddingTop - mPaddingBottom; 1414637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1415637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(270); 14167d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(-height + mPaddingTop, Math.min(0, scrollX)); 14177d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell mEdgeGlowLeft.setSize(height, getWidth()); 1418637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft.draw(canvas)) { 1419637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 1420637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1421637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1422637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1423637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowRight.isFinished()) { 1424637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 1425637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int width = getWidth(); 14267d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int height = getHeight() - mPaddingTop - mPaddingBottom; 1427637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1428637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(90); 14297d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(-mPaddingTop, 1430b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira -(Math.max(getScrollRange(), scrollX) + width)); 1431b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira mEdgeGlowRight.setSize(height, width); 1432637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowRight.draw(canvas)) { 1433637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell invalidate(); 1434637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1435637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1436637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1437637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1438637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1439637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int clamp(int n, int my, int child) { 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (my >= child || n < 0) { 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((my + n) > child) { 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child - my; 14469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return n; 14489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1450