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 192ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.content.Context; 202ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.content.res.TypedArray; 21637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Canvas; 22637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Rect; 2390f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powellimport android.os.Build; 24a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganovimport android.os.Bundle; 25c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglioimport android.os.Parcel; 26c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglioimport android.os.Parcelable; 272ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.util.AttributeSet; 280dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengrenimport android.util.Log; 292ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.FocusFinder; 3033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brownimport android.view.InputDevice; 312ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.KeyEvent; 322ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.MotionEvent; 33637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.view.VelocityTracker; 342ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.View; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewConfiguration; 362ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.ViewDebug; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 39a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityEvent; 40a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityNodeInfo; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.animation.AnimationUtils; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.List; 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout container for a view hierarchy that can be scrolled by the user, 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * allowing it to be larger than the physical display. A HorizontalScrollView 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link FrameLayout}, meaning you should place one child in it 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * containing the entire contents to scroll; this child may itself be a layout 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manager with a complex hierarchy of objects. A child that is often used 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link LinearLayout} in a horizontal orientation, presenting a horizontal 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * array of top-level items that the user can scroll through. 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The {@link TextView} class also 5515279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * takes care of its own scrolling, so does not require a HorizontalScrollView, but 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * using the two together is possible to achieve the effect of a text view 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within a larger container. 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5915279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * <p>HorizontalScrollView only supports horizontal scrolling. For vertical scrolling, 6015279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * use either {@link ScrollView} or {@link ListView}. 614e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 624e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class HorizontalScrollView extends FrameLayout { 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int ANIMATED_SCROLL_GAP = ScrollView.ANIMATED_SCROLL_GAP; 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final float MAX_SCROLL_FACTOR = ScrollView.MAX_SCROLL_FACTOR; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 690dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren private static final String TAG = "HorizontalScrollView"; 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; 7589935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect mEdgeGlowLeft; 7689935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect 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 */ 81df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell private int 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 139c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio private SavedState mSavedState; 140c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context) { 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context, AttributeSet attrs) { 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.horizontalScrollViewStyle); 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context, AttributeSet attrs, int defStyle) { 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project initScrollView(); 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = context.obtainStyledAttributes(attrs, 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project android.R.styleable.HorizontalScrollView, defStyle, 0); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFillViewport(a.getBoolean(android.R.styleable.HorizontalScrollView_fillViewport, false)); 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getLeftFadingEdgeStrength() { 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getHorizontalFadingEdgeLength(); 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScrollX < length) { 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mScrollX / (float) length; 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getRightFadingEdgeStrength() { 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getHorizontalFadingEdgeLength(); 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int rightEdge = getWidth() - mPaddingRight; 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int span = getChildAt(0).getRight() - mScrollX - rightEdge; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (span < length) { 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return span / (float) length; 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount this scroll view will scroll in response to 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mRight - mLeft)); 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void initScrollView() { 201637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller = new OverScroller(getContext()); 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFocusable(true); 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setWillNotDraw(false); 2054296fc4d326447875c26a925f12b3935632f13bbRomain Guy final ViewConfiguration configuration = ViewConfiguration.get(mContext); 2064296fc4d326447875c26a925f12b3935632f13bbRomain Guy mTouchSlop = configuration.getScaledTouchSlop(); 2074296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMinimumVelocity = configuration.getScaledMinimumFlingVelocity(); 2084296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 209637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance = configuration.getScaledOverscrollDistance(); 210637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance = configuration.getScaledOverflingDistance(); 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child) { 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child); 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index) { 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index); 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, ViewGroup.LayoutParams params) { 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, params); 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index, ViewGroup.LayoutParams params) { 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index, params); 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns true this HorizontalScrollView can be scrolled 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean canScroll() { 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidth = child.getWidth(); 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getWidth() < childWidth + mPaddingLeft + mPaddingRight ; 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 262fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * Indicates whether this HorizontalScrollView's content is stretched to 263fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * fill the viewport. 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if the content fills the viewport, false otherwise. 266fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * 267fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isFillViewport() { 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFillViewport; 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 274fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * Indicates this HorizontalScrollView whether it should stretch its content width 275fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * to fill the viewport or not. 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fillViewport True to stretch the content's width to the viewport's 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * boundaries, false otherwise. 2794e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 280fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFillViewport(boolean fillViewport) { 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fillViewport != mFillViewport) { 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFillViewport = fillViewport; 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether arrow scrolling will animate its transition. 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSmoothScrollingEnabled() { 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSmoothScrollingEnabled; 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set whether arrow scrolling will animate its transition. 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param smoothScrollingEnabled whether arrow scrolling will animate its transition 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSmoothScrollingEnabled(boolean smoothScrollingEnabled) { 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSmoothScrollingEnabled = smoothScrollingEnabled; 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mFillViewport) { 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (widthMode == MeasureSpec.UNSPECIFIED) { 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 317ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 318ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final View child = getChildAt(0); 319ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int width = getMeasuredWidth(); 320ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (child.getMeasuredWidth() < width) { 321ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final FrameLayout.LayoutParams lp = (LayoutParams) child.getLayoutParams(); 3224e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 323ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec, mPaddingTop 324ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy + mPaddingBottom, lp.height); 325ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy width -= mPaddingLeft; 326ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy width -= mPaddingRight; 327ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 3284e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 329ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 330ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Let the focused view and/or our descendants get the key first 3378e618e54ef0f009cac15972af9d9a72d6f6b6f94Romain Guy return super.dispatchKeyEvent(event) || executeKeyEvent(event); 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You can call this function yourself to have the scroll view perform 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling from a key event, just as if the event had been dispatched to 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it by the view hierarchy. 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param event The key event to execute. 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Return true if the event was handled, else false. 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean executeKeyEvent(KeyEvent event) { 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.setEmpty(); 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!canScroll()) { 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFocused()) { 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused, View.FOCUS_RIGHT); 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocused != null && nextFocused != this && 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(View.FOCUS_RIGHT); 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (event.getAction() == KeyEvent.ACTION_DOWN) { 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (event.getKeyCode()) { 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_LEFT); 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_LEFT); 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_RIGHT); 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_RIGHT); 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pageScroll(event.isShiftPressed() ? View.FOCUS_LEFT : View.FOCUS_RIGHT); 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3894cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private boolean inChild(int x, int y) { 3904cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (getChildCount() > 0) { 391352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell final int scrollX = mScrollX; 3924cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final View child = getChildAt(0); 3934cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell return !(y < child.getTop() 3944cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell || y >= child.getBottom() 395352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || x < child.getLeft() - scrollX 396352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || x >= child.getRight() - scrollX); 3974cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 3984cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell return false; 3994cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4004e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 40113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initOrResetVelocityTracker() { 40213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 40313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 40413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } else { 40513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.clear(); 40613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 40713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 40813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 40913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initVelocityTrackerIfNotExists() { 41013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 41113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 41213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 41313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 41413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 41513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void recycleVelocityTracker() { 41613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker != null) { 41713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.recycle(); 41813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = null; 41913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 42013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 42113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 42213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka @Override 42313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) { 42413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (disallowIntercept) { 42513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 42613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 42713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka super.requestDisallowInterceptTouchEvent(disallowIntercept); 42813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 42913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onInterceptTouchEvent(MotionEvent ev) { 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This method JUST determines whether we want to intercept the motion. 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If we return true, onMotionEvent will be called and we do the actual 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling there. 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Shortcut the most recurring case: the user is in the dragging 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * state and he is moving his finger. We want to intercept this 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * motion. 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((action == MotionEvent.ACTION_MOVE) && (mIsBeingDragged)) { 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4484cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell switch (action & MotionEvent.ACTION_MASK) { 4494cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_MOVE: { 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether the user has moved far enough from his original down touch. 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Locally do absolute value. mLastMotionX is set to the x value 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the down event. 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4599d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int activePointerId = mActivePointerId; 4609d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell if (activePointerId == INVALID_POINTER) { 4619d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell // If we don't have a valid id, the touch down wasn't on content. 4629d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell break; 4639d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell } 4649d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell 4659d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int pointerIndex = ev.findPointerIndex(activePointerId); 4660dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren if (pointerIndex == -1) { 4670dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren Log.e(TAG, "Invalid pointerId=" + activePointerId 4680dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren + " in onInterceptTouchEvent"); 4690dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren break; 4700dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren } 4710dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren 472df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int x = (int) ev.getX(pointerIndex); 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int xDiff = (int) Math.abs(x - mLastMotionX); 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (xDiff > mTouchSlop) { 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = true; 4764cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mLastMotionX = x; 47713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 47813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mParent != null) mParent.requestDisallowInterceptTouchEvent(true); 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4824cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4844cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_DOWN: { 485df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int x = (int) ev.getX(); 4864cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (!inChild((int) x, (int) ev.getY())) { 4874cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mIsBeingDragged = false; 48813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 4894cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 4904cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4914e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 4924cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell /* 4934cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * Remember location of down touch. 4944cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * ACTION_DOWN always refers to pointer index 0. 4954cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell */ 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastMotionX = x; 4974cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = ev.getPointerId(0); 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 49913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initOrResetVelocityTracker(); 50013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 50113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If being flinged and user touches the screen, initiate drag; 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * otherwise don't. mScroller.isFinished should be false when 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being flinged. 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = !mScroller.isFinished(); 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5094cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_CANCEL: 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Release the drag */ 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = false; 5154cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = INVALID_POINTER; 516637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) { 517df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 518637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 5194cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 5209bc30d31322848d61f518c1db43544988faaba8fAdam Powell case MotionEvent.ACTION_POINTER_DOWN: { 5219bc30d31322848d61f518c1db43544988faaba8fAdam Powell final int index = ev.getActionIndex(); 522df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(index); 5239bc30d31322848d61f518c1db43544988faaba8fAdam Powell mActivePointerId = ev.getPointerId(index); 5249bc30d31322848d61f518c1db43544988faaba8fAdam Powell break; 5259bc30d31322848d61f518c1db43544988faaba8fAdam Powell } 5264cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_POINTER_UP: 5274cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell onSecondaryPointerUp(ev); 528df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(ev.findPointerIndex(mActivePointerId)); 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The only time we want to intercept motion events is if we are in the 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drag mode. 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mIsBeingDragged; 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent ev) { 54113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mVelocityTracker.addMovement(ev); 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5464cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell switch (action & MotionEvent.ACTION_MASK) { 5474cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_DOWN: { 548b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (getChildCount() == 0) { 549fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown return false; 550fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown } 551b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if ((mIsBeingDragged = !mScroller.isFinished())) { 552b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 553b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 554b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 555b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 556b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 558352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell /* 559352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * If being flinged and user touches, stop the fling. isFinished 560352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * will be false if being flinged. 561352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell */ 562352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (!mScroller.isFinished()) { 563352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mScroller.abortAnimation(); 564352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 565352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember where the motion event started 567df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(); 568352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = ev.getPointerId(0); 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5704cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_MOVE: 572b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int activePointerIndex = ev.findPointerIndex(mActivePointerId); 5730dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren if (activePointerIndex == -1) { 5740dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren Log.e(TAG, "Invalid pointerId=" + mActivePointerId + " in onTouchEvent"); 5750dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren break; 5760dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren } 5770dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren 578b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int x = (int) ev.getX(activePointerIndex); 579b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell int deltaX = mLastMotionX - x; 580b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (!mIsBeingDragged && Math.abs(deltaX) > mTouchSlop) { 581b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 582b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 583b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 584b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 585b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell mIsBeingDragged = true; 586b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (deltaX > 0) { 587b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaX -= mTouchSlop; 588b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } else { 589b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaX += mTouchSlop; 590b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 591b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 5924cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mIsBeingDragged) { 5934cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // Scroll to follow the motion event 5944cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mLastMotionX = x; 5954cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell 596637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldX = mScrollX; 597637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldY = mScrollY; 598637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int range = getScrollRange(); 599e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 600e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 601e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 602e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 603cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette // Calling overScrollBy will call onOverScrolled, which 604cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette // calls onScrollChanged if applicable. 605f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (overScrollBy(deltaX, 0, mScrollX, 0, range, 0, 606637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance, 0, true)) { 607637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Break our velocity if we hit a scroll barrier. 608637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mVelocityTracker.clear(); 609637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 610637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 611e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio if (canOverscroll) { 612637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int pulledToX = oldX + deltaX; 613637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (pulledToX < 0) { 614637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onPull((float) deltaX / getWidth()); 615637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowRight.isFinished()) { 616637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 617637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 618637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (pulledToX > range) { 619637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onPull((float) deltaX / getWidth()); 620637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowLeft.isFinished()) { 621637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 622637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 623637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 624637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null 625637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell && (!mEdgeGlowLeft.isFinished() || !mEdgeGlowRight.isFinished())) { 626df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 627637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 628637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 6294cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 6324cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mIsBeingDragged) { 6334cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final VelocityTracker velocityTracker = mVelocityTracker; 6344cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 6354cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell int initialVelocity = (int) velocityTracker.getXVelocity(mActivePointerId); 6364cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell 637f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (getChildCount() > 0) { 638637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if ((Math.abs(initialVelocity) > mMinimumVelocity)) { 639637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell fling(-initialVelocity); 640637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 641f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, 642f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell getScrollRange(), 0, 0)) { 643df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 644637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 645637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 64617dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell } 6474e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 6484cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = INVALID_POINTER; 6494cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mIsBeingDragged = false; 65013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 652637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 653637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 654637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 655637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6574cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 658352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell case MotionEvent.ACTION_CANCEL: 659352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (mIsBeingDragged && getChildCount() > 0) { 660637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) { 661df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 662637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 663352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = INVALID_POINTER; 664352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mIsBeingDragged = false; 66513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 66613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 667637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 668637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 669637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 670637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 671352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 672352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell break; 6734cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_POINTER_UP: 6744cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell onSecondaryPointerUp(ev); 6754cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6794e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 6804cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private void onSecondaryPointerUp(MotionEvent ev) { 6814cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 6824cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell MotionEvent.ACTION_POINTER_INDEX_SHIFT; 6834cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int pointerId = ev.getPointerId(pointerIndex); 6844cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (pointerId == mActivePointerId) { 6854cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // This was our active pointer going up. Choose a new 6864cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // active pointer and adjust accordingly. 6874cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // TODO: Make this decision more intelligent. 6884cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 689df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(newPointerIndex); 6904cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = ev.getPointerId(newPointerIndex); 6914cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mVelocityTracker != null) { 6924cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mVelocityTracker.clear(); 6934cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6944cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6954cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6964e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 697637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 69833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown public boolean onGenericMotionEvent(MotionEvent event) { 69933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { 70033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown switch (event.getAction()) { 70133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown case MotionEvent.ACTION_SCROLL: { 70233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (!mIsBeingDragged) { 70333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final float hscroll; 70433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) { 70533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown hscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL); 70633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } else { 70733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL); 70833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 70933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (hscroll != 0) { 71033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final int delta = (int) (hscroll * getHorizontalScrollFactor()); 71133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown final int range = getScrollRange(); 71233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown int oldScrollX = mScrollX; 71333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown int newScrollX = oldScrollX + delta; 71433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (newScrollX < 0) { 71533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown newScrollX = 0; 71633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } else if (newScrollX > range) { 71733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown newScrollX = range; 71833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 71933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if (newScrollX != oldScrollX) { 72033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown super.scrollTo(newScrollX, mScrollY); 72133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown return true; 72233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 72833bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown return super.onGenericMotionEvent(event); 72933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 73033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown 73133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown @Override 7329edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka public boolean shouldDelayChildPressedState() { 7339edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka return true; 7349edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka } 7359edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka 7369edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka @Override 737637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell protected void onOverScrolled(int scrollX, int scrollY, 738637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell boolean clampedX, boolean clampedY) { 739637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Treat animating scrolls differently; see #computeScroll() for why. 740637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mScroller.isFinished()) { 741cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette final int oldX = mScrollX; 742cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette final int oldY = mScrollY; 743637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollX = scrollX; 744637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollY = scrollY; 7450fd89bf7221431260883cee4597e2db942d799a0Romain Guy invalidateParentIfNeeded(); 746cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette onScrollChanged(mScrollX, mScrollY, oldX, oldY); 747637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (clampedX) { 748637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0); 749637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 750637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 751637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.scrollTo(scrollX, scrollY); 752637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 753e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy 754e72cf7341a608402309ce894fc12d050cc7c0e14Romain Guy awakenScrollBars(); 755637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 756637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 757a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 758a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov public boolean performAccessibilityAction(int action, Bundle arguments) { 75948d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov if (super.performAccessibilityAction(action, arguments)) { 76048d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return true; 76148d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 762a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov switch (action) { 763a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: { 764fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (!isEnabled()) { 765fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov return false; 766fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 767a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportWidth = getWidth() - mPaddingLeft - mPaddingRight; 768a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollX = Math.min(mScrollX + viewportWidth, getScrollRange()); 769a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollX != mScrollX) { 770a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(targetScrollX, 0); 771a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 772a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 773a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 774a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: { 775fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (!isEnabled()) { 776fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov return false; 777fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 778a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportWidth = getWidth() - mPaddingLeft - mPaddingRight; 779a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollX = Math.max(0, mScrollX - viewportWidth); 780a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollX != mScrollX) { 781a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(targetScrollX, 0); 782a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 783a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 784a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 785a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 78648d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return false; 787a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 788a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov 789a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov @Override 790a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 791a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov super.onInitializeAccessibilityNodeInfo(info); 7928a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov info.setClassName(HorizontalScrollView.class.getName()); 793a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int scrollRange = getScrollRange(); 794a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (scrollRange > 0) { 795a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov info.setScrollable(true); 796fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled() && mScrollX > 0) { 797a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD); 798a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 799fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled() && mScrollX < scrollRange) { 800a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD); 801a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 802a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 803a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 804a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 805a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 806a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 807a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov super.onInitializeAccessibilityEvent(event); 8088a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov event.setClassName(HorizontalScrollView.class.getName()); 809d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollable(getScrollRange() > 0); 810d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollX(mScrollX); 811d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollY(mScrollY); 812d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollX(getScrollRange()); 813d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollY(mScrollY); 814a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 815a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 8160b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell private int getScrollRange() { 8170b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell int scrollRange = 0; 8180b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (getChildCount() > 0) { 8190b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell View child = getChildAt(0); 8200b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell scrollRange = Math.max(0, 821637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell child.getWidth() - (getWidth() - mPaddingLeft - mPaddingRight)); 8220b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 8230b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return scrollRange; 8240b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in this View's bounds 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (excluding fading edges) pretending that this View's left is located at 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the parameter left. 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param leftFocus look for a candidate is the one at the left of the bounds 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if leftFocus is true, or at the right of the bounds if leftFocus 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is false 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the bounds in which a focusable must be 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found (the fading edge is assumed to start at this position) 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param preferredFocusable the View that has highest priority and will be 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returned if it is within my bounds (null is valid) 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can be found 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInMyBounds(final boolean leftFocus, 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int left, View preferredFocusable) { 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The fading edge's transparent side should be considered for focus 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * since it's mostly visible, so we divide the actual fading edge length 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * by 2. 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int fadingEdgeLength = getHorizontalFadingEdgeLength() / 2; 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int leftWithoutFadingEdge = left + fadingEdgeLength; 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int rightWithoutFadingEdge = left + getWidth() - fadingEdgeLength; 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((preferredFocusable != null) 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (preferredFocusable.getLeft() < rightWithoutFadingEdge) 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (preferredFocusable.getRight() > leftWithoutFadingEdge)) { 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return preferredFocusable; 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return findFocusableViewInBounds(leftFocus, leftWithoutFadingEdge, 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rightWithoutFadingEdge); 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in the specified bounds. 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param leftFocus look for a candidate is the one at the left of the bounds 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if leftFocus is true, or at the right of the bounds if 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * leftFocus is false 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the bounds in which a focusable must be 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param right the right offset of the bounds in which a focusable must 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInBounds(boolean leftFocus, int left, int right) { 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project List<View> focusables = getFocusables(View.FOCUS_FORWARD); 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusCandidate = null; 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A fully contained focusable is one where its left is below the bound's 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * left, and its right is above the bound's right. A partially 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained focusable is one where some part of it is within the 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds, but it also has some part that is not within bounds. A fully contained 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusable is preferred to a partially contained focusable. 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean foundFullyContainedFocusable = false; 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = focusables.size(); 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = focusables.get(i); 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewLeft = view.getLeft(); 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewRight = view.getRight(); 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (left < viewRight && viewLeft < right) { 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the focusable is in the target area, it is a candidate for 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusing 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsFullyContained = (left < viewLeft) && 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewRight < right); 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusCandidate == null) { 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* No candidate, take this one */ 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = viewIsFullyContained; 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsCloserToBoundary = 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (leftFocus && viewLeft < focusCandidate.getLeft()) || 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (!leftFocus && viewRight > focusCandidate.getRight()); 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (foundFullyContainedFocusable) { 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained && viewIsCloserToBoundary) { 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We're dealing with only fully contained views, so 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it has to be closer to the boundary to beat our 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * candidate 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained) { 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Any fully contained view beats a partially contained view */ 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = true; 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (viewIsCloserToBoundary) { 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Partially contained view beats another partially 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained view if it's closer 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return focusCandidate; 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "page up/down" shortcut press. This 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view by one page left or right and give the focus 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the leftmost/rightmost component in the new visible area. If no 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page left or {@link android.view.View#FOCUS_RIGHT} 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page right 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean pageScroll(int direction) { 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean right = direction == View.FOCUS_RIGHT; 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (right) { 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = getScrollX() + width; 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 965ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View view = getChildAt(0); 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.left + width > view.getRight()) { 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = view.getRight() - width; 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = getScrollX() - width; 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.left < 0) { 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = 0; 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = mTempRect.left + width; 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.left, mTempRect.right); 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "home/end" shortcut press. This 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view to the left or right and give the focus 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the leftmost/rightmost component in the new visible area. If no 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the left of the view or {@link android.view.View#FOCUS_RIGHT} 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the right 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean fullScroll(int direction) { 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean right = direction == View.FOCUS_RIGHT; 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = 0; 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = width; 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (right) { 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 1003ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View view = getChildAt(0); 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = view.getRight(); 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = mTempRect.right - width; 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.left, mTempRect.right); 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Scrolls the view to make the area defined by <code>left</code> and 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <code>right</code> visible. This method attempts to give the focus 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to a component visible in this area. If no component can be focused in 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the new visible area, the focus is reclaimed by this scrollview.</p> 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go left {@link android.view.View#FOCUS_RIGHT} to right 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the new area to be made visible 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param right the right offset of the new area to be made visible 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollAndFocus(int direction, int left, int right) { 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = true; 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerLeft = getScrollX(); 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerRight = containerLeft + width; 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean goLeft = direction == View.FOCUS_LEFT; 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocused = findFocusableViewInBounds(goLeft, left, right); 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocused == null) { 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocused = this; 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (left >= containerLeft && right <= containerRight) { 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = false; 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = goLeft ? (left - containerLeft) : (right - containerRight); 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(delta); 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10442ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != findFocus()) newFocused.requestFocus(direction); 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle scrolling in response to a left or right arrow click. 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction The direction corresponding to the arrow key that was 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pressed 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if we consumed the event, false otherwise 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean arrowScroll(int direction) { 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, direction); 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = getMaxScrollAmount(); 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocused != null && isWithinDeltaOfScreen(nextFocused, maxJump)) { 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.getDrawingRect(mTempRect); 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(nextFocused, mTempRect); 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(scrollDelta); 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(direction); 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no new focus 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = maxJump; 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_LEFT && getScrollX() < scrollDelta) { 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = getScrollX(); 1077ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } else if (direction == View.FOCUS_RIGHT && getChildCount() > 0) { 10784e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1079ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int daRight = getChildAt(0).getRight(); 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenRight = getScrollX() + getWidth(); 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (daRight - screenRight < maxJump) { 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = daRight - screenRight; 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta == 0) { 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(direction == View.FOCUS_RIGHT ? scrollDelta : -scrollDelta); 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused != null && currentFocused.isFocused() 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && isOffScreen(currentFocused)) { 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // previously focused item still has focus and is off screen, give 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it up (take it back to ourselves) 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (also, need to temporarily force FOCUS_BEFORE_DESCENDANTS so we are 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // sure to 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get it) 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int descendantFocusability = getDescendantFocusability(); // save 11019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS); 11029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestFocus(); 11039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(descendantFocusability); // restore 11049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is scrolled off 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * screen. 11119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isOffScreen(View descendant) { 11139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return !isWithinDeltaOfScreen(descendant, 0); 11149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is within delta 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixels of being on the screen. 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isWithinDeltaOfScreen(View descendant, int delta) { 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mTempRect.right + delta) >= getScrollX() 11259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (mTempRect.left - delta) <= (getScrollX() + getWidth()); 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Smooth scroll by a X delta 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta the number of pixels to scroll by on the X axis 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void doScrollX(int delta) { 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSmoothScrollingEnabled) { 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(delta, 0); 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(delta, 0); 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 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 * Like {@link View#scrollBy}, but scroll smoothly instead of immediately. 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dx the number of pixels to scroll by on the X axis 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dy the number of pixels to scroll by on the Y axis 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollBy(int dx, int dy) { 11503fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell if (getChildCount() == 0) { 11513fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell // Nothing to do. 11523fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell return; 11533fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell } 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll; 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (duration > ANIMATED_SCROLL_GAP) { 1156f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int width = getWidth() - mPaddingRight - mPaddingLeft; 1157f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int right = getChildAt(0).getWidth(); 1158f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int maxX = Math.max(0, right - width); 1159f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int scrollX = mScrollX; 1160f54460576e88d7531b171575d37264dfe0a34f33Adam Powell dx = Math.max(0, Math.min(scrollX + dx, maxX)) - scrollX; 1161f54460576e88d7531b171575d37264dfe0a34f33Adam Powell 1162f54460576e88d7531b171575d37264dfe0a34f33Adam Powell mScroller.startScroll(scrollX, mScrollY, dx, 0); 1163df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mScroller.isFinished()) { 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.abortAnimation(); 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(dx, dy); 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastScroll = AnimationUtils.currentAnimationTimeMillis(); 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link #scrollTo}, but scroll smoothly instead of immediately. 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x the position where to scroll on the X axis 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y the position where to scroll on the Y axis 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollTo(int x, int y) { 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(x - mScrollX, y - mScrollY); 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The scroll range of a scroll view is the overall width of all of its 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children.</p> 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollRange() { 1189a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int count = getChildCount(); 1190a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int contentWidth = getWidth() - mPaddingLeft - mPaddingRight; 11910b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (count == 0) { 1192a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell return contentWidth; 11930b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 11944e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1195637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int scrollRange = getChildAt(0).getRight(); 1196637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollX = mScrollX; 1197637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overscrollRight = Math.max(0, scrollRange - contentWidth); 1198637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (scrollX < 0) { 1199637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange -= scrollX; 1200637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (scrollX > overscrollRight) { 1201637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange += scrollX - overscrollRight; 1202637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1203637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1204637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return scrollRange; 12050b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 12064e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 12070b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell @Override 12080b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell protected int computeHorizontalScrollOffset() { 12090b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return Math.max(0, super.computeHorizontalScrollOffset()); 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChild(View child, int parentWidthMeasureSpec, int parentHeightMeasureSpec) { 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams lp = child.getLayoutParams(); 12159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthMeasureSpec; 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightMeasureSpec; 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, mPaddingTop 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + mPaddingBottom, lp.height); 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int parentHeightMeasureSpec, int heightUsed) { 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + heightUsed, lp.height); 12359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec( 12369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp.leftMargin + lp.rightMargin, MeasureSpec.UNSPECIFIED); 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 12399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void computeScroll() { 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScroller.computeScrollOffset()) { 12449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is called at drawing time by ViewGroup. We don't want to 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // re-show the scrollbars at this point, which scrollTo will do, 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so we replicate most of scrollTo here. 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's a little odd to call onScrollChanged from inside the drawing. 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It is, except when you remember that computeScroll() is used to 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // animate scrolling. So unless we want to defer the onScrollChanged() 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // until the end of the animated scrolling, we don't really have a 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // choice here. 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // I agree. The alternative, which I think would be worse, is to post 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // something and tell the subclasses later. This is bad because there 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // will be a window where mScrollX/Y is different from what the app 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // thinks it is. 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldX = mScrollX; 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldY = mScrollY; 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int x = mScroller.getCurrX(); 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int y = mScroller.getCurrY(); 126417dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell 1265637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (oldX != x || oldY != y) { 1266e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int range = getScrollRange(); 1267e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 1268e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 1269e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 1270e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1271e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio overScrollBy(x - oldX, y - oldY, oldX, oldY, range, 0, 1272637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance, 0, false); 1273637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell onScrollChanged(mScrollX, mScrollY, oldX, oldY); 1274637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1275e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio if (canOverscroll) { 1276637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (x < 0 && oldX >= 0) { 1277637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onAbsorb((int) mScroller.getCurrVelocity()); 1278637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (x > range && oldX <= range) { 1279637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onAbsorb((int) mScroller.getCurrVelocity()); 1280637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 12819d32d24dbd8a015c9d5c44ed4901d5a666eb8e7fAdam Powell } 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1283e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1284e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy if (!awakenScrollBars()) { 1285df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1286e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy } 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls the view to the given child. 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child the View to scroll to 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollToChild(View child) { 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getDrawingRect(mTempRect); 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Offset from child's local coordinates to ScrollView coordinates */ 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(child, mTempRect); 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta != 0) { 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(scrollDelta, 0); 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If rect is off screen, scroll just enough to get it (or at least the 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * first screen size chunk of it) on screen. 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rectangle. 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param immediate True to scroll immediately without animation 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if scrolling was performed 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollToChildRect(Rect rect, boolean immediate) { 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int delta = computeScrollDeltaToGetChildRectOnScreen(rect); 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = delta != 0; 13199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 13209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (immediate) { 13219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(delta, 0); 13229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(delta, 0); 13249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Compute the amount to scroll in the X direction in order to get 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a rectangle completely on the screen (or, if taller than the screen, 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least the first screen size chunk of it). 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rect. 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The scroll delta. 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) { 1338ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() == 0) return 0; 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenLeft = getScrollX(); 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenRight = screenLeft + width; 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdge = getHorizontalFadingEdgeLength(); 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for left fading edge as long as rect isn't at very left 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.left > 0) { 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenLeft += fadingEdge; 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for right fading edge as long as rect isn't at very right 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.right < getChildAt(0).getWidth()) { 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenRight -= fadingEdge; 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollXDelta = 0; 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.right > screenRight && rect.left > screenLeft) { 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move right to get it in view: move right just enough so 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.width() > width) { 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta += (rect.left - screenLeft); 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at right of screen 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta += (rect.right - screenRight); 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our content 1372ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int right = getChildAt(0).getRight(); 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToRight = right - screenRight; 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta = Math.min(scrollXDelta, distanceToRight); 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.left < screenLeft && rect.right < screenRight) { 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move right to get it in view: move right just enough so that 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.width() > width) { 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta -= (screenRight - rect.right); 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at left 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta -= (screenLeft - rect.left); 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the left our content 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta = Math.max(scrollXDelta, -getScrollX()); 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollXDelta; 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestChildFocus(View child, View focused) { 13972ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (!mIsLayoutDirty) { 13982ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne scrollToChild(focused); 13992ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne } else { 14002ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne // The child may not be laid out yet, we can't compute the scroll yet 14012ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne mChildToScrollTo = focused; 14029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestChildFocus(child, focused); 14049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When looking for focus in children of a scroll view, need to be a little 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * more careful not to give focus to something that is scrolled off screen. 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is more expensive than the default {@link android.view.ViewGroup} 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * implementation, otherwise this behavior might have been made the default. 14139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean onRequestFocusInDescendants(int direction, 14169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect previouslyFocusedRect) { 14179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // convert from forward / backward notation to up / down / left / right 14199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (ugh). 14209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_FORWARD) { 14219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_RIGHT; 14229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == View.FOCUS_BACKWARD) { 14239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_LEFT; 14249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = previouslyFocusedRect == null ? 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocus(this, null, direction) : 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocusFromRect(this, 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect, direction); 14309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus == null) { 14329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 14339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isOffScreen(nextFocus)) { 14369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 14379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocus.requestFocus(direction, previouslyFocusedRect); 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rectangle, 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean immediate) { 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset into coordinate space of this scroll view 14469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rectangle.offset(child.getLeft() - child.getScrollX(), 14479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getTop() - child.getScrollY()); 14489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollToChildRect(rectangle, immediate); 14509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestLayout() { 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = true; 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestLayout(); 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onLayout(boolean changed, int l, int t, int r, int b) { 1460f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio int childWidth = 0; 1461f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio int childMargins = 0; 1462f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1463f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio if (getChildCount() > 0) { 1464f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio childWidth = getChildAt(0).getMeasuredWidth(); 1465f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio LayoutParams childParams = (LayoutParams) getChildAt(0).getLayoutParams(); 1466f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio childMargins = childParams.leftMargin + childParams.rightMargin; 1467f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio } 1468f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1469c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio final int available = r - l - getPaddingLeftWithForeground() - 1470f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio getPaddingRightWithForeground() - childMargins; 1471f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1472c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio final boolean forceLeftGravity = (childWidth > available); 1473f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1474c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio layoutChildren(l, t, r, b, forceLeftGravity); 1475f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 14769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = false; 14779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Give a child focus if it needs it 14789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChildToScrollTo != null && isViewDescendantOf(mChildToScrollTo, this)) { 147990f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell scrollToChild(mChildToScrollTo); 14809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChildToScrollTo = null; 14829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14837a46dde1ae56a85fcb5cdac91173424b6355bf3cChet Haase if (!isLaidOut()) { 1484c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio final int scrollRange = Math.max(0, 1485c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio childWidth - (r - l - mPaddingLeft - mPaddingRight)); 1486c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio if (mSavedState != null) { 1487c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio if (isLayoutRtl() == mSavedState.isLayoutRtl) { 1488c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = mSavedState.scrollPosition; 1489c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } else { 1490c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = scrollRange - mSavedState.scrollPosition; 1491c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1492fafe88c3d983f1578e096af69ab8420c846b237eFabrice Di Meglio mSavedState = null; 1493c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } else { 1494c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio if (isLayoutRtl()) { 1495c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = scrollRange - mScrollX; 1496c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } // mScrollX default value is "0" for LTR 1497c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1498c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio // Don't forget to clamp 1499c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio if (mScrollX > scrollRange) { 1500c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = scrollRange; 1501c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } else if (mScrollX < 0) { 1502c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = 0; 1503c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1504c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1505c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1506f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa // Calling this with the present values causes it to re-claim them 15079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollTo(mScrollX, mScrollY); 15089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 15119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onSizeChanged(int w, int h, int oldw, int oldh) { 15129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onSizeChanged(w, h, oldw, oldh); 15139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 15159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (null == currentFocused || this == currentFocused) 15169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 15179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = mRight - mLeft; 15199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isWithinDeltaOfScreen(currentFocused, maxJump)) { 15219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused.getDrawingRect(mTempRect); 15229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocused, mTempRect); 15239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 15249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(scrollDelta); 15259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1529f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa * Return true if child is a descendant of parent, (or equal to the parent). 15309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1531e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static boolean isViewDescendantOf(View child, View parent) { 15329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 15339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 15349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 15379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewDescendantOf((View) theParent, parent); 15389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fling the scroll view 15429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 15439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param velocityX The initial velocity in the X direction. Positive 1544f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa * numbers mean that the finger/cursor is moving down the screen, 15459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * which means we want to scroll towards the left. 15469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 15479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void fling(int velocityX) { 1548ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 1549ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int width = getWidth() - mPaddingRight - mPaddingLeft; 1550ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int right = getChildAt(0).getWidth(); 15514e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 15524e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira mScroller.fling(mScrollX, mScrollY, velocityX, 0, 0, 1553637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Math.max(0, right - width), 0, 0, width/2, 0); 15544e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1555ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final boolean movingRight = velocityX > 0; 15564e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 15572ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne View currentFocused = findFocus(); 1558ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View newFocused = findFocusableViewInMyBounds(movingRight, 15592ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne mScroller.getFinalX(), currentFocused); 15604e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1561ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (newFocused == null) { 1562ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy newFocused = this; 1563ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 15644e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 15652ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != currentFocused) { 15662ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne newFocused.requestFocus(movingRight ? View.FOCUS_RIGHT : View.FOCUS_LEFT); 1567ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 15684e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1569df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 15709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 15759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 15769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>This version also clamps the scrolling to the bounds of our child. 15779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 15782ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne @Override 15799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void scrollTo(int x, int y) { 15809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we rely on the fact the View.scrollBy calls scrollTo. 15819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 15829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 15839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project x = clamp(x, getWidth() - mPaddingRight - mPaddingLeft, child.getWidth()); 15849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project y = clamp(y, getHeight() - mPaddingBottom - mPaddingTop, child.getHeight()); 15859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x != mScrollX || y != mScrollY) { 15869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.scrollTo(x, y); 15879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1591637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1592637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverScrollMode(int mode) { 1593637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mode != OVER_SCROLL_NEVER) { 1594637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft == null) { 15954e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira Context context = getContext(); 159689935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowLeft = new EdgeEffect(context); 159789935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowRight = new EdgeEffect(context); 1598637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1599637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 1600637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft = null; 1601637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight = null; 1602637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1603637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.setOverScrollMode(mode); 1604637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1605637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 16062243e555b061254f7f0f72ca1d6cd44db6c266faRomain Guy @SuppressWarnings({"SuspiciousNameCombination"}) 1607637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1608637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void draw(Canvas canvas) { 1609637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.draw(canvas); 1610637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 1611637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollX = mScrollX; 1612637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowLeft.isFinished()) { 1613637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 16147d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int height = getHeight() - mPaddingTop - mPaddingBottom; 1615637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1616637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(270); 16177d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(-height + mPaddingTop, Math.min(0, scrollX)); 16187d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell mEdgeGlowLeft.setSize(height, getWidth()); 1619637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft.draw(canvas)) { 1620df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1621637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1622637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1623637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1624637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowRight.isFinished()) { 1625637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 1626637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int width = getWidth(); 16277d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int height = getHeight() - mPaddingTop - mPaddingBottom; 1628637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1629637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(90); 16307d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(-mPaddingTop, 1631b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira -(Math.max(getScrollRange(), scrollX) + width)); 1632b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira mEdgeGlowRight.setSize(height, width); 1633637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowRight.draw(canvas)) { 1634df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1635637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1636637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1637637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1638637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1639637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1640637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1641e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static int clamp(int n, int my, int child) { 16429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (my >= child || n < 0) { 16439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 16449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((my + n) > child) { 16469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child - my; 16479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return n; 16499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1650c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1651c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1652c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio protected void onRestoreInstanceState(Parcelable state) { 165390f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell if (mContext.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.JELLY_BEAN_MR2) { 165490f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Some old apps reused IDs in ways they shouldn't have. 165590f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Don't break them, but they don't get scroll state restoration. 165690f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell super.onRestoreInstanceState(state); 165790f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell return; 165890f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell } 1659c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio SavedState ss = (SavedState) state; 1660c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super.onRestoreInstanceState(ss.getSuperState()); 1661c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mSavedState = ss; 1662c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio requestLayout(); 1663c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1664c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1665c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1666c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio protected Parcelable onSaveInstanceState() { 166790f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell if (mContext.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.JELLY_BEAN_MR2) { 166890f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Some old apps reused IDs in ways they shouldn't have. 166990f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Don't break them, but they don't get scroll state restoration. 167090f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell return super.onSaveInstanceState(); 167190f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell } 1672c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio Parcelable superState = super.onSaveInstanceState(); 1673c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio SavedState ss = new SavedState(superState); 1674c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio ss.scrollPosition = mScrollX; 1675c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio ss.isLayoutRtl = isLayoutRtl(); 1676c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return ss; 1677c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1678c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1679c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio static class SavedState extends BaseSavedState { 1680c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public int scrollPosition; 1681c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public boolean isLayoutRtl; 1682c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1683c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio SavedState(Parcelable superState) { 1684c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super(superState); 1685c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1686c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1687c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public SavedState(Parcel source) { 1688c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super(source); 1689c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio scrollPosition = source.readInt(); 1690c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio isLayoutRtl = (source.readInt() == 0) ? true : false; 1691c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1692c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1693c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1694c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public void writeToParcel(Parcel dest, int flags) { 1695c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super.writeToParcel(dest, flags); 1696c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio dest.writeInt(scrollPosition); 1697c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio dest.writeInt(isLayoutRtl ? 1 : 0); 1698c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1699c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1700c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1701c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public String toString() { 1702c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return "HorizontalScrollView.SavedState{" 1703c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio + Integer.toHexString(System.identityHashCode(this)) 1704c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio + " scrollPosition=" + scrollPosition 1705c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio + " isLayoutRtl=" + isLayoutRtl + "}"; 1706c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1707c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1708c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public static final Parcelable.Creator<SavedState> CREATOR 1709c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio = new Parcelable.Creator<SavedState>() { 1710c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public SavedState createFromParcel(Parcel in) { 1711c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return new SavedState(in); 1712c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1713c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1714c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public SavedState[] newArray(int size) { 1715c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return new SavedState[size]; 1716c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1717c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio }; 1718c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 17199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1720