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 1994a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamyimport android.annotation.NonNull; 202ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.content.Context; 212fe301db7555bccf53e465436d4cb7442c803df3Adam Powellimport android.content.res.Configuration; 222ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.content.res.TypedArray; 23637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Canvas; 24637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.graphics.Rect; 2590f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powellimport android.os.Build; 26a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganovimport android.os.Bundle; 27c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglioimport android.os.Parcel; 28c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglioimport android.os.Parcelable; 292ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.util.AttributeSet; 300dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengrenimport android.util.Log; 312ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.FocusFinder; 3233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brownimport android.view.InputDevice; 332ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.KeyEvent; 342ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.MotionEvent; 35637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powellimport android.view.VelocityTracker; 362ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.View; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewConfiguration; 382ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunneimport android.view.ViewDebug; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 4094a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamyimport android.view.ViewHierarchyEncoder; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewParent; 42a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityEvent; 43a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganovimport android.view.accessibility.AccessibilityNodeInfo; 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.animation.AnimationUtils; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 46ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatovimport com.android.internal.R; 47ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.List; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Layout container for a view hierarchy that can be scrolled by the user, 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * allowing it to be larger than the physical display. A HorizontalScrollView 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link FrameLayout}, meaning you should place one child in it 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * containing the entire contents to scroll; this child may itself be a layout 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * manager with a complex hierarchy of objects. A child that is often used 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is a {@link LinearLayout} in a horizontal orientation, presenting a horizontal 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * array of top-level items that the user can scroll through. 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The {@link TextView} class also 6015279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * takes care of its own scrolling, so does not require a HorizontalScrollView, but 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * using the two together is possible to achieve the effect of a text view 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * within a larger container. 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6415279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * <p>HorizontalScrollView only supports horizontal scrolling. For vertical scrolling, 6515279cfc566aee7f860ebfdfe9d4a6fbc0497362Scott Main * use either {@link ScrollView} or {@link ListView}. 664e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 674e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class HorizontalScrollView extends FrameLayout { 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int ANIMATED_SCROLL_GAP = ScrollView.ANIMATED_SCROLL_GAP; 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final float MAX_SCROLL_FACTOR = ScrollView.MAX_SCROLL_FACTOR; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 740dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren private static final String TAG = "HorizontalScrollView"; 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private long mLastScroll; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final Rect mTempRect = new Rect(); 79637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private OverScroller mScroller; 8089935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect mEdgeGlowLeft; 8189935e41c593a599e8955388b27fb926e60e5e94Adam Powell private EdgeEffect mEdgeGlowRight; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Position of the last motion event. 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 86df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell private int mLastMotionX; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True when the layout has changed but the traversal has not come through yet. 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Ideally the view hierarchy would keep track of this for us. 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsLayoutDirty = true; 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The child to give focus to in the event that a child has requested focus while the 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout is dirty. This prevents the scroll from being wrong if the child has not been 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * laid out before requesting focus. 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mChildToScrollTo = null; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * True if the user is currently dragging this ScrollView around. This is 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not the same as 'is being flinged', which can be checked by 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mScroller.isFinished() (flinging begins when the user lifts his finger). 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsBeingDragged = false; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Determines speed during touch scrolling 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private VelocityTracker mVelocityTracker; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When set to true, the scroll view measure its child to make it fill the currently 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * visible area. 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 117a174d7a0d5475dbae2b48f7359abf1637a882896Romain Guy @ViewDebug.ExportedProperty(category = "layout") 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mFillViewport; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether arrow scrolling is animated. 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mSmoothScrollingEnabled = true; 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mTouchSlop; 1264296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMinimumVelocity; 1274296fc4d326447875c26a925f12b3935632f13bbRomain Guy private int mMaximumVelocity; 1284e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 129637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverscrollDistance; 130637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell private int mOverflingDistance; 131637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 132f830652e978ce3eb85528bca81bbdfff2c09cd4aAaron Whyte private float mHorizontalScrollFactor; 13320ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns 1344cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell /** 1354cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * ID of the active pointer. This is used to retain consistency during 1364cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * drags/flings if multiple pointers are used. 1374cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell */ 1384cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private int mActivePointerId = INVALID_POINTER; 1394e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1404cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell /** 1414cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * Sentinel value for no current active pointer. 1424cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * Used by {@link #mActivePointerId}. 1434cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell */ 1444cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private static final int INVALID_POINTER = -1; 1454e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 146c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio private SavedState mSavedState; 147c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context) { 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public HorizontalScrollView(Context context, AttributeSet attrs) { 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.horizontalScrollViewStyle); 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 156617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette public HorizontalScrollView(Context context, AttributeSet attrs, int defStyleAttr) { 157617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette this(context, attrs, defStyleAttr, 0); 158617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette } 159617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette 160617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette public HorizontalScrollView( 161617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 162617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette super(context, attrs, defStyleAttr, defStyleRes); 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project initScrollView(); 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 165617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette final TypedArray a = context.obtainStyledAttributes( 166617feb99a06e7ffb3894e86a286bf30e085f321aAlan Viverette attrs, android.R.styleable.HorizontalScrollView, defStyleAttr, defStyleRes); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFillViewport(a.getBoolean(android.R.styleable.HorizontalScrollView_fillViewport, false)); 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1712fe301db7555bccf53e465436d4cb7442c803df3Adam Powell 1722fe301db7555bccf53e465436d4cb7442c803df3Adam Powell if (context.getResources().getConfiguration().uiMode == Configuration.UI_MODE_TYPE_WATCH) { 1732fe301db7555bccf53e465436d4cb7442c803df3Adam Powell setRevealOnFocusHint(false); 1742fe301db7555bccf53e465436d4cb7442c803df3Adam Powell } 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getLeftFadingEdgeStrength() { 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getHorizontalFadingEdgeLength(); 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScrollX < length) { 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mScrollX / (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 @Override 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected float getRightFadingEdgeStrength() { 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0.0f; 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int length = getHorizontalFadingEdgeLength(); 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int rightEdge = getWidth() - mPaddingRight; 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int span = getChildAt(0).getRight() - mScrollX - rightEdge; 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (span < length) { 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return span / (float) length; 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1.0f; 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The maximum amount this scroll view will scroll in response to 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * an arrow event. 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMaxScrollAmount() { 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (int) (MAX_SCROLL_FACTOR * (mRight - mLeft)); 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void initScrollView() { 217637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller = new OverScroller(getContext()); 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFocusable(true); 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setWillNotDraw(false); 2214296fc4d326447875c26a925f12b3935632f13bbRomain Guy final ViewConfiguration configuration = ViewConfiguration.get(mContext); 2224296fc4d326447875c26a925f12b3935632f13bbRomain Guy mTouchSlop = configuration.getScaledTouchSlop(); 2234296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMinimumVelocity = configuration.getScaledMinimumFlingVelocity(); 2244296fc4d326447875c26a925f12b3935632f13bbRomain Guy mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 225637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance = configuration.getScaledOverscrollDistance(); 226637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance = configuration.getScaledOverflingDistance(); 227f830652e978ce3eb85528bca81bbdfff2c09cd4aAaron Whyte mHorizontalScrollFactor = configuration.getScaledHorizontalScrollFactor(); 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child) { 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child); 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index) { 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index); 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, ViewGroup.LayoutParams params) { 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, params); 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void addView(View child, int index, ViewGroup.LayoutParams params) { 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("HorizontalScrollView can host only one direct child"); 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.addView(child, index, params); 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Returns true this HorizontalScrollView can be scrolled 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean canScroll() { 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidth = child.getWidth(); 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getWidth() < childWidth + mPaddingLeft + mPaddingRight ; 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 279fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * Indicates whether this HorizontalScrollView's content is stretched to 280fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * fill the viewport. 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if the content fills the viewport, false otherwise. 283fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * 284fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isFillViewport() { 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFillViewport; 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 291fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * Indicates this HorizontalScrollView whether it should stretch its content width 292fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * to fill the viewport or not. 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fillViewport True to stretch the content's width to the viewport's 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * boundaries, false otherwise. 2964e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira * 297fdbf484be1eca388553d97a13a9500b98b18b474Romain Guy * @attr ref android.R.styleable#HorizontalScrollView_fillViewport 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setFillViewport(boolean fillViewport) { 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fillViewport != mFillViewport) { 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFillViewport = fillViewport; 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether arrow scrolling will animate its transition. 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isSmoothScrollingEnabled() { 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSmoothScrollingEnabled; 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set whether arrow scrolling will animate its transition. 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param smoothScrollingEnabled whether arrow scrolling will animate its transition 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSmoothScrollingEnabled(boolean smoothScrollingEnabled) { 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSmoothScrollingEnabled = smoothScrollingEnabled; 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onMeasure(widthMeasureSpec, heightMeasureSpec); 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mFillViewport) { 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (widthMode == MeasureSpec.UNSPECIFIED) { 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 334ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 335ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final View child = getChildAt(0); 336115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int widthPadding; 337115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int heightPadding; 338115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final FrameLayout.LayoutParams lp = (LayoutParams) child.getLayoutParams(); 339115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 340115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar if (targetSdkVersion >= Build.VERSION_CODES.M) { 341115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar widthPadding = mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin; 342115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar heightPadding = mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin; 343115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar } else { 344115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar widthPadding = mPaddingLeft + mPaddingRight; 345115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar heightPadding = mPaddingTop + mPaddingBottom; 346115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar } 3474e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 348115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar int desiredWidth = getMeasuredWidth() - widthPadding; 349115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar if (child.getMeasuredWidth() < desiredWidth) { 350115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec( 351115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar desiredWidth, MeasureSpec.EXACTLY); 352115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int childHeightMeasureSpec = getChildMeasureSpec( 353115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar heightMeasureSpec, heightPadding, lp.height); 354ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 355ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Let the focused view and/or our descendants get the key first 3628e618e54ef0f009cac15972af9d9a72d6f6b6f94Romain Guy return super.dispatchKeyEvent(event) || executeKeyEvent(event); 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You can call this function yourself to have the scroll view perform 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling from a key event, just as if the event had been dispatched to 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it by the view hierarchy. 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param event The key event to execute. 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Return true if the event was handled, else false. 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean executeKeyEvent(KeyEvent event) { 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.setEmpty(); 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!canScroll()) { 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isFocused()) { 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused, View.FOCUS_RIGHT); 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocused != null && nextFocused != this && 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(View.FOCUS_RIGHT); 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (event.getAction() == KeyEvent.ACTION_DOWN) { 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (event.getKeyCode()) { 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_LEFT); 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_LEFT); 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!event.isAltPressed()) { 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = arrowScroll(View.FOCUS_RIGHT); 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = fullScroll(View.FOCUS_RIGHT); 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_SPACE: 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pageScroll(event.isShiftPressed() ? View.FOCUS_LEFT : View.FOCUS_RIGHT); 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4144cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private boolean inChild(int x, int y) { 4154cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (getChildCount() > 0) { 416352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell final int scrollX = mScrollX; 4174cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final View child = getChildAt(0); 4184cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell return !(y < child.getTop() 4194cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell || y >= child.getBottom() 420352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || x < child.getLeft() - scrollX 421352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell || x >= child.getRight() - scrollX); 4224cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4234cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell return false; 4244cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 4254e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 42613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initOrResetVelocityTracker() { 42713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 42813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 42913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } else { 43013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.clear(); 43113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 43213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 43313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 43413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void initVelocityTrackerIfNotExists() { 43513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker == null) { 43613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = VelocityTracker.obtain(); 43713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 43813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 43913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 44013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka private void recycleVelocityTracker() { 44113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (mVelocityTracker != null) { 44213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.recycle(); 44313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker = null; 44413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 44513451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 44613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 44713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka @Override 44813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) { 44913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka if (disallowIntercept) { 45013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 45113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 45213451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka super.requestDisallowInterceptTouchEvent(disallowIntercept); 45313451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka } 45413451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onInterceptTouchEvent(MotionEvent ev) { 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This method JUST determines whether we want to intercept the motion. 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If we return true, onMotionEvent will be called and we do the actual 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * scrolling there. 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Shortcut the most recurring case: the user is in the dragging 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * state and he is moving his finger. We want to intercept this 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * motion. 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((action == MotionEvent.ACTION_MOVE) && (mIsBeingDragged)) { 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 473d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi if (super.onInterceptTouchEvent(ev)) { 474d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi return true; 475d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi } 476d85bc5074dc1211fdb1c6799d9321af54ac5a32fKeisuke Kuroyanagi 4774cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell switch (action & MotionEvent.ACTION_MASK) { 4784cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_MOVE: { 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * whether the user has moved far enough from his original down touch. 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Locally do absolute value. mLastMotionX is set to the x value 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the down event. 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4889d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int activePointerId = mActivePointerId; 4899d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell if (activePointerId == INVALID_POINTER) { 4909d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell // If we don't have a valid id, the touch down wasn't on content. 4919d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell break; 4929d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell } 4939d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell 4949d0335b1e3a2c70506db2413ac8d8a0f88ba6becAdam Powell final int pointerIndex = ev.findPointerIndex(activePointerId); 4950dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren if (pointerIndex == -1) { 4960dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren Log.e(TAG, "Invalid pointerId=" + activePointerId 4970dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren + " in onInterceptTouchEvent"); 4980dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren break; 4990dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren } 5000dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren 501df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int x = (int) ev.getX(pointerIndex); 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int xDiff = (int) Math.abs(x - mLastMotionX); 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (xDiff > mTouchSlop) { 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = true; 5054cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mLastMotionX = x; 50613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 50713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mParent != null) mParent.requestDisallowInterceptTouchEvent(true); 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5114cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5134cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_DOWN: { 514df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell final int x = (int) ev.getX(); 5154cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (!inChild((int) x, (int) ev.getY())) { 5164cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mIsBeingDragged = false; 51713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 5184cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 5194cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 5204e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 5214cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell /* 5224cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * Remember location of down touch. 5234cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell * ACTION_DOWN always refers to pointer index 0. 5244cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell */ 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastMotionX = x; 5264cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = ev.getPointerId(0); 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 52813451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initOrResetVelocityTracker(); 52913451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka mVelocityTracker.addMovement(ev); 53013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If being flinged and user touches the screen, initiate drag; 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * otherwise don't. mScroller.isFinished should be false when 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being flinged. 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = !mScroller.isFinished(); 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5384cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_CANCEL: 5419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Release the drag */ 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsBeingDragged = false; 5444cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = INVALID_POINTER; 545637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) { 546df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 547637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 5484cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 5499bc30d31322848d61f518c1db43544988faaba8fAdam Powell case MotionEvent.ACTION_POINTER_DOWN: { 5509bc30d31322848d61f518c1db43544988faaba8fAdam Powell final int index = ev.getActionIndex(); 551df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(index); 5529bc30d31322848d61f518c1db43544988faaba8fAdam Powell mActivePointerId = ev.getPointerId(index); 5539bc30d31322848d61f518c1db43544988faaba8fAdam Powell break; 5549bc30d31322848d61f518c1db43544988faaba8fAdam Powell } 5554cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_POINTER_UP: 5564cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell onSecondaryPointerUp(ev); 557df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(ev.findPointerIndex(mActivePointerId)); 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The only time we want to intercept motion events is if we are in the 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drag mode. 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mIsBeingDragged; 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent ev) { 57013451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka initVelocityTrackerIfNotExists(); 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mVelocityTracker.addMovement(ev); 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int action = ev.getAction(); 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5754cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell switch (action & MotionEvent.ACTION_MASK) { 5764cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_DOWN: { 577b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (getChildCount() == 0) { 578fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown return false; 579fb75738ee28839c67bef4abc15d6c7a407c34f55Jeff Brown } 580b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if ((mIsBeingDragged = !mScroller.isFinished())) { 581b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 582b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 583b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 584b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 585b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 587352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell /* 588352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * If being flinged and user touches, stop the fling. isFinished 589352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell * will be false if being flinged. 590352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell */ 591352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (!mScroller.isFinished()) { 592352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mScroller.abortAnimation(); 593352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 594352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember where the motion event started 596df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(); 597352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = ev.getPointerId(0); 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5994cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_MOVE: 601b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int activePointerIndex = ev.findPointerIndex(mActivePointerId); 6020dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren if (activePointerIndex == -1) { 6030dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren Log.e(TAG, "Invalid pointerId=" + mActivePointerId + " in onTouchEvent"); 6040dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren break; 6050dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren } 6060dc291eef630cbc3c4479fff8c549567ac980f87Johan Rosengren 607b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final int x = (int) ev.getX(activePointerIndex); 608b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell int deltaX = mLastMotionX - x; 609b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (!mIsBeingDragged && Math.abs(deltaX) > mTouchSlop) { 610b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell final ViewParent parent = getParent(); 611b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (parent != null) { 612b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell parent.requestDisallowInterceptTouchEvent(true); 613b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 614b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell mIsBeingDragged = true; 615b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell if (deltaX > 0) { 616b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaX -= mTouchSlop; 617b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } else { 618b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell deltaX += mTouchSlop; 619b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 620b3e02c44d57ac18d1debf21044289cf85d0dd672Adam Powell } 6214cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mIsBeingDragged) { 6224cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // Scroll to follow the motion event 6234cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mLastMotionX = x; 6244cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell 625637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldX = mScrollX; 626637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int oldY = mScrollY; 627637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int range = getScrollRange(); 628e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 629e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 630e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 631e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 632cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette // Calling overScrollBy will call onOverScrolled, which 633cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette // calls onScrollChanged if applicable. 634f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (overScrollBy(deltaX, 0, mScrollX, 0, range, 0, 635637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverscrollDistance, 0, true)) { 636637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Break our velocity if we hit a scroll barrier. 637637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mVelocityTracker.clear(); 638637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 639637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 640e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio if (canOverscroll) { 641637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int pulledToX = oldX + deltaX; 642637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (pulledToX < 0) { 643c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell mEdgeGlowLeft.onPull((float) deltaX / getWidth(), 644c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell 1.f - ev.getY(activePointerIndex) / getHeight()); 645637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowRight.isFinished()) { 646637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 647637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 648637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (pulledToX > range) { 649c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell mEdgeGlowRight.onPull((float) deltaX / getWidth(), 650c501db9f44f7967961f0ba61a0b3b63055ac1190Adam Powell ev.getY(activePointerIndex) / getHeight()); 651637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowLeft.isFinished()) { 652637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 653637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 654637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 655637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null 656637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell && (!mEdgeGlowLeft.isFinished() || !mEdgeGlowRight.isFinished())) { 657df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 658637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 659637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 6604cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case MotionEvent.ACTION_UP: 6634cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mIsBeingDragged) { 6644cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final VelocityTracker velocityTracker = mVelocityTracker; 6654cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 6664cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell int initialVelocity = (int) velocityTracker.getXVelocity(mActivePointerId); 6674cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell 668f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (getChildCount() > 0) { 669637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if ((Math.abs(initialVelocity) > mMinimumVelocity)) { 670637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell fling(-initialVelocity); 671637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 672f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, 673f6a6c97062d905be267fcb8f70e6eb06fb7e5ab4Adam Powell getScrollRange(), 0, 0)) { 674df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 675637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 676637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 67717dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell } 6784e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 6794cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = INVALID_POINTER; 6804cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mIsBeingDragged = false; 68113451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 683637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 684637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 685637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 686637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6884cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 689352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell case MotionEvent.ACTION_CANCEL: 690352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell if (mIsBeingDragged && getChildCount() > 0) { 691637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) { 692df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 693637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 694352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mActivePointerId = INVALID_POINTER; 695352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell mIsBeingDragged = false; 69613451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka recycleVelocityTracker(); 69713451a476a1951a19d3cb531c47bf5a51587800aMichael Jurka 698637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 699637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onRelease(); 700637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onRelease(); 701637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 702352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell } 703352b978fa8332808ce38c6f52edd04c8dcb9e7e3Adam Powell break; 7044cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell case MotionEvent.ACTION_POINTER_UP: 7054cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell onSecondaryPointerUp(ev); 7064cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell break; 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7104e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 7114cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell private void onSecondaryPointerUp(MotionEvent ev) { 7124cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 7134cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell MotionEvent.ACTION_POINTER_INDEX_SHIFT; 7144cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int pointerId = ev.getPointerId(pointerIndex); 7154cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (pointerId == mActivePointerId) { 7164cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // This was our active pointer going up. Choose a new 7174cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // active pointer and adjust accordingly. 7184cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell // TODO: Make this decision more intelligent. 7194cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 720df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell mLastMotionX = (int) ev.getX(newPointerIndex); 7214cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mActivePointerId = ev.getPointerId(newPointerIndex); 7224cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell if (mVelocityTracker != null) { 7234cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell mVelocityTracker.clear(); 7244cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 7254cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 7264cd47702f00a2fd6d6bc16c5398edb884d98bdcaAdam Powell } 7274e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 728637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 72933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown public boolean onGenericMotionEvent(MotionEvent event) { 73020ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns switch (event.getAction()) { 73120ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns case MotionEvent.ACTION_SCROLL: { 73220ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns if (!mIsBeingDragged) { 73320ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns final float axisValue; 73420ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) { 73533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) { 73620ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns axisValue = -event.getAxisValue(MotionEvent.AXIS_VSCROLL); 73733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } else { 73820ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns axisValue = event.getAxisValue(MotionEvent.AXIS_HSCROLL); 73933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 74020ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns } else if (event.isFromSource(InputDevice.SOURCE_ROTARY_ENCODER)) { 74120ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns axisValue = event.getAxisValue(MotionEvent.AXIS_SCROLL); 74220ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns } else { 74320ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns axisValue = 0; 74420ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns } 74520ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns 746f830652e978ce3eb85528bca81bbdfff2c09cd4aAaron Whyte final int delta = Math.round(axisValue * mHorizontalScrollFactor); 74720ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns if (delta != 0) { 74820ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns final int range = getScrollRange(); 74920ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns int oldScrollX = mScrollX; 75020ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns int newScrollX = oldScrollX + delta; 75120ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns if (newScrollX < 0) { 75220ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns newScrollX = 0; 75320ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns } else if (newScrollX > range) { 75420ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns newScrollX = range; 75520ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns } 75620ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns if (newScrollX != oldScrollX) { 75720ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns super.scrollTo(newScrollX, mScrollY); 75820ad07358175f116896b9c86d50d6ce4038a66d8Ned Burns return true; 75933bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 76033bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 76133bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 76233bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 76333bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 76433bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown return super.onGenericMotionEvent(event); 76533bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown } 76633bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown 76733bbfd2232ea9eaae9a9d87a05a95a430f09bd83Jeff Brown @Override 7689edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka public boolean shouldDelayChildPressedState() { 7699edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka return true; 7709edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka } 7719edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka 7729edd58e9504cc3f070758e9125c49a72a3642186Michael Jurka @Override 773637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell protected void onOverScrolled(int scrollX, int scrollY, 774637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell boolean clampedX, boolean clampedY) { 775637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell // Treat animating scrolls differently; see #computeScroll() for why. 776637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mScroller.isFinished()) { 777cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette final int oldX = mScrollX; 778cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette final int oldY = mScrollY; 779637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollX = scrollX; 780637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScrollY = scrollY; 7810fd89bf7221431260883cee4597e2db942d799a0Romain Guy invalidateParentIfNeeded(); 782cb25bd8c2b41fad0f65114c42d8f6e732645dd96Alan Viverette onScrollChanged(mScrollX, mScrollY, oldX, oldY); 783637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (clampedX) { 784637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0); 785637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 786637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 787637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.scrollTo(scrollX, scrollY); 788637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 789b3fa2787eabd2be6d7780e215db0d9a5904ba47cSvet Ganov 790e72cf7341a608402309ce894fc12d050cc7c0e14Romain Guy awakenScrollBars(); 791637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 792637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 793a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette /** @hide */ 794a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 795a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette public boolean performAccessibilityActionInternal(int action, Bundle arguments) { 796a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette if (super.performAccessibilityActionInternal(action, arguments)) { 79748d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return true; 79848d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 799a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov switch (action) { 800ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: 801ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case R.id.accessibilityActionScrollRight: { 802fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (!isEnabled()) { 803fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov return false; 804fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 805a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportWidth = getWidth() - mPaddingLeft - mPaddingRight; 806a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollX = Math.min(mScrollX + viewportWidth, getScrollRange()); 807a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollX != mScrollX) { 808a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(targetScrollX, 0); 809a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 810a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 811a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 812ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: 813ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov case R.id.accessibilityActionScrollLeft: { 814fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (!isEnabled()) { 815fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov return false; 816fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 817a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int viewportWidth = getWidth() - mPaddingLeft - mPaddingRight; 818a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int targetScrollX = Math.max(0, mScrollX - viewportWidth); 819a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (targetScrollX != mScrollX) { 820a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov smoothScrollTo(targetScrollX, 0); 821a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov return true; 822a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 823a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } return false; 824a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 82548d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return false; 826a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 827a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov 828a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn @Override 829a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn public CharSequence getAccessibilityClassName() { 830a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn return HorizontalScrollView.class.getName(); 831a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn } 832a7bb6fbeab933326d58aa806d8194b7b13239d34Dianne Hackborn 833a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette /** @hide */ 834a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov @Override 835a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 836a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette super.onInitializeAccessibilityNodeInfoInternal(info); 837a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov final int scrollRange = getScrollRange(); 838a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov if (scrollRange > 0) { 839a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov info.setScrollable(true); 840fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled() && mScrollX > 0) { 841ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_BACKWARD); 842ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_LEFT); 843a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 844fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled() && mScrollX < scrollRange) { 845ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_FORWARD); 846ac6ffce1711b84682521e6c2e55865c60929fd88Maxim Bogatov info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_RIGHT); 847a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 848a1dc761c8322355eb1bb71d3d6c9c603c1d1fc0fSvetoslav Ganov } 849a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 850a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 851a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette /** @hide */ 852a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov @Override 853a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 854a54956a0bc611b1e9b3914edc7a604b59688f6b7Alan Viverette super.onInitializeAccessibilityEventInternal(event); 855d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollable(getScrollRange() > 0); 856d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollX(mScrollX); 857d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setScrollY(mScrollY); 858d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollX(getScrollRange()); 859d9ee72fddb8be40e414a831fb80458dc48699613Svetoslav Ganov event.setMaxScrollY(mScrollY); 860a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov } 861a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 8620b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell private int getScrollRange() { 8630b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell int scrollRange = 0; 8640b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (getChildCount() > 0) { 8650b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell View child = getChildAt(0); 8660b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell scrollRange = Math.max(0, 867637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell child.getWidth() - (getWidth() - mPaddingLeft - mPaddingRight)); 8680b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 8690b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return scrollRange; 8700b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in this View's bounds 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * (excluding fading edges) pretending that this View's left is located at 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the parameter left. 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param leftFocus look for a candidate is the one at the left of the bounds 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if leftFocus is true, or at the right of the bounds if leftFocus 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is false 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the bounds in which a focusable must be 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found (the fading edge is assumed to start at this position) 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param preferredFocusable the View that has highest priority and will be 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returned if it is within my bounds (null is valid) 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can be found 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInMyBounds(final boolean leftFocus, 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int left, View preferredFocusable) { 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The fading edge's transparent side should be considered for focus 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * since it's mostly visible, so we divide the actual fading edge length 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * by 2. 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int fadingEdgeLength = getHorizontalFadingEdgeLength() / 2; 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int leftWithoutFadingEdge = left + fadingEdgeLength; 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int rightWithoutFadingEdge = left + getWidth() - fadingEdgeLength; 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((preferredFocusable != null) 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (preferredFocusable.getLeft() < rightWithoutFadingEdge) 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (preferredFocusable.getRight() > leftWithoutFadingEdge)) { 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return preferredFocusable; 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return findFocusableViewInBounds(leftFocus, leftWithoutFadingEdge, 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rightWithoutFadingEdge); 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finds the next focusable component that fits in the specified bounds. 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param leftFocus look for a candidate is the one at the left of the bounds 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if leftFocus is true, or at the right of the bounds if 9169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * leftFocus is false 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the bounds in which a focusable must be 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * found 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param right the right offset of the bounds in which a focusable must 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the next focusable component in the bounds or null if none can 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be found 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View findFocusableViewInBounds(boolean leftFocus, int left, int right) { 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project List<View> focusables = getFocusables(View.FOCUS_FORWARD); 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View focusCandidate = null; 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A fully contained focusable is one where its left is below the bound's 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * left, and its right is above the bound's right. A partially 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained focusable is one where some part of it is within the 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * bounds, but it also has some part that is not within bounds. A fully contained 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusable is preferred to a partially contained focusable. 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean foundFullyContainedFocusable = false; 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = focusables.size(); 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < count; i++) { 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View view = focusables.get(i); 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewLeft = view.getLeft(); 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int viewRight = view.getRight(); 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (left < viewRight && viewLeft < right) { 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the focusable is in the target area, it is a candidate for 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focusing 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsFullyContained = (left < viewLeft) && 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (viewRight < right); 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (focusCandidate == null) { 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* No candidate, take this one */ 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = viewIsFullyContained; 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean viewIsCloserToBoundary = 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (leftFocus && viewLeft < focusCandidate.getLeft()) || 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (!leftFocus && viewRight > focusCandidate.getRight()); 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (foundFullyContainedFocusable) { 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained && viewIsCloserToBoundary) { 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We're dealing with only fully contained views, so 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it has to be closer to the boundary to beat our 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * candidate 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (viewIsFullyContained) { 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Any fully contained view beats a partially contained view */ 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project foundFullyContainedFocusable = true; 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (viewIsCloserToBoundary) { 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Partially contained view beats another partially 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * contained view if it's closer 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project focusCandidate = view; 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return focusCandidate; 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "page up/down" shortcut press. This 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view by one page left or right and give the focus 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the leftmost/rightmost component in the new visible area. If no 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page left or {@link android.view.View#FOCUS_RIGHT} 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go one page right 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean pageScroll(int direction) { 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean right = direction == View.FOCUS_RIGHT; 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (right) { 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = getScrollX() + width; 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 1011ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View view = getChildAt(0); 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.left + width > view.getRight()) { 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = view.getRight() - width; 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = getScrollX() - width; 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mTempRect.left < 0) { 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = 0; 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = mTempRect.left + width; 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.left, mTempRect.right); 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Handles scrolling in response to a "home/end" shortcut press. This 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * method will scroll the view to the left or right and give the focus 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the leftmost/rightmost component in the new visible area. If no 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * component is a good candidate for focus, this scrollview reclaims the 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus.</p> 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the left of the view or {@link android.view.View#FOCUS_RIGHT} 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go the right 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean fullScroll(int direction) { 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean right = direction == View.FOCUS_RIGHT; 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = 0; 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = width; 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (right) { 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = getChildCount(); 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (count > 0) { 1049ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View view = getChildAt(0); 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.right = view.getRight(); 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTempRect.left = mTempRect.right - width; 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollAndFocus(direction, mTempRect.left, mTempRect.right); 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>Scrolls the view to make the area defined by <code>left</code> and 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <code>right</code> visible. This method attempts to give the focus 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to a component visible in this area. If no component can be focused in 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the new visible area, the focus is reclaimed by this scrollview.</p> 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction the scroll direction: {@link android.view.View#FOCUS_LEFT} 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to go left {@link android.view.View#FOCUS_RIGHT} to right 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param left the left offset of the new area to be made visible 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param right the right offset of the new area to be made visible 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the key event is consumed by this method, false otherwise 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollAndFocus(int direction, int left, int right) { 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = true; 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerLeft = getScrollX(); 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int containerRight = containerLeft + width; 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean goLeft = direction == View.FOCUS_LEFT; 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View newFocused = findFocusableViewInBounds(goLeft, left, right); 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newFocused == null) { 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newFocused = this; 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (left >= containerLeft && right <= containerRight) { 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = false; 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = goLeft ? (left - containerLeft) : (right - containerRight); 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(delta); 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10902ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != findFocus()) newFocused.requestFocus(direction); 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handle scrolling in response to a left or right arrow click. 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param direction The direction corresponding to the arrow key that was 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pressed 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return True if we consumed the event, false otherwise 11019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean arrowScroll(int direction) { 11039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 11059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused == this) currentFocused = null; 11069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, direction); 11089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = getMaxScrollAmount(); 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocused != null && isWithinDeltaOfScreen(nextFocused, maxJump)) { 11129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.getDrawingRect(mTempRect); 11139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(nextFocused, mTempRect); 11149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(scrollDelta); 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextFocused.requestFocus(direction); 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // no new focus 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = maxJump; 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_LEFT && getScrollX() < scrollDelta) { 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = getScrollX(); 1123ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } else if (direction == View.FOCUS_RIGHT && getChildCount() > 0) { 11244e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1125ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int daRight = getChildAt(0).getRight(); 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenRight = getScrollX() + getWidth(); 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (daRight - screenRight < maxJump) { 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollDelta = daRight - screenRight; 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta == 0) { 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(direction == View.FOCUS_RIGHT ? scrollDelta : -scrollDelta); 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (currentFocused != null && currentFocused.isFocused() 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && isOffScreen(currentFocused)) { 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // previously focused item still has focus and is off screen, give 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // it up (take it back to ourselves) 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (also, need to temporarily force FOCUS_BEFORE_DESCENDANTS so we are 11449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // sure to 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get it) 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int descendantFocusability = getDescendantFocusability(); // save 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS); 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestFocus(); 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setDescendantFocusability(descendantFocusability); // restore 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is scrolled off 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * screen. 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isOffScreen(View descendant) { 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return !isWithinDeltaOfScreen(descendant, 0); 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return whether the descendant of this scroll view is within delta 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * pixels of being on the screen. 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean isWithinDeltaOfScreen(View descendant, int delta) { 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project descendant.getDrawingRect(mTempRect); 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(descendant, mTempRect); 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (mTempRect.right + delta) >= getScrollX() 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project && (mTempRect.left - delta) <= (getScrollX() + getWidth()); 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Smooth scroll by a X delta 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta the number of pixels to scroll by on the X axis 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void doScrollX(int delta) { 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta != 0) { 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSmoothScrollingEnabled) { 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(delta, 0); 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(delta, 0); 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link View#scrollBy}, but scroll smoothly instead of immediately. 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dx the number of pixels to scroll by on the X axis 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param dy the number of pixels to scroll by on the Y axis 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollBy(int dx, int dy) { 11963fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell if (getChildCount() == 0) { 11973fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell // Nothing to do. 11983fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell return; 11993fc3737ceb0f5c3b086472fb2cf7ebfb089e1bc8Adam Powell } 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll; 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (duration > ANIMATED_SCROLL_GAP) { 1202f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int width = getWidth() - mPaddingRight - mPaddingLeft; 1203f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int right = getChildAt(0).getWidth(); 1204f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int maxX = Math.max(0, right - width); 1205f54460576e88d7531b171575d37264dfe0a34f33Adam Powell final int scrollX = mScrollX; 1206f54460576e88d7531b171575d37264dfe0a34f33Adam Powell dx = Math.max(0, Math.min(scrollX + dx, maxX)) - scrollX; 1207f54460576e88d7531b171575d37264dfe0a34f33Adam Powell 1208f54460576e88d7531b171575d37264dfe0a34f33Adam Powell mScroller.startScroll(scrollX, mScrollY, dx, 0); 1209df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mScroller.isFinished()) { 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.abortAnimation(); 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(dx, dy); 12159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastScroll = AnimationUtils.currentAnimationTimeMillis(); 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Like {@link #scrollTo}, but scroll smoothly instead of immediately. 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x the position where to scroll on the X axis 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param y the position where to scroll on the Y axis 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final void smoothScrollTo(int x, int y) { 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(x - mScrollX, y - mScrollY); 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>The scroll range of a scroll view is the overall width of all of its 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children.</p> 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollRange() { 1235a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int count = getChildCount(); 1236a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell final int contentWidth = getWidth() - mPaddingLeft - mPaddingRight; 12370b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell if (count == 0) { 1238a2f91016840bf4f7274577d40f3610e38b77f2adAdam Powell return contentWidth; 12390b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 12404e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1241637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell int scrollRange = getChildAt(0).getRight(); 1242637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollX = mScrollX; 1243637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int overscrollRight = Math.max(0, scrollRange - contentWidth); 1244637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (scrollX < 0) { 1245637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange -= scrollX; 1246637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (scrollX > overscrollRight) { 1247637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell scrollRange += scrollX - overscrollRight; 1248637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1249637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1250637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell return scrollRange; 12510b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell } 12524e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 12530b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell @Override 12540b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell protected int computeHorizontalScrollOffset() { 12550b8bb4282a7d1afb24f8c4d5beb2ca4ecc731116Adam Powell return Math.max(0, super.computeHorizontalScrollOffset()); 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1259115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar protected void measureChild(View child, int parentWidthMeasureSpec, 1260115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar int parentHeightMeasureSpec) { 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams lp = child.getLayoutParams(); 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1263115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int horizontalPadding = mPaddingLeft + mPaddingRight; 1264115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int childWidthMeasureSpec = MeasureSpec.makeSafeMeasureSpec( 1265115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar Math.max(0, MeasureSpec.getSize(parentWidthMeasureSpec) - horizontalPadding), 1266115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar MeasureSpec.UNSPECIFIED); 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1268115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, 1269115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar mPaddingTop + mPaddingBottom, lp.height); 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int parentHeightMeasureSpec, int heightUsed) { 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + heightUsed, lp.height); 1281115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int usedTotal = mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin + 1282115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar widthUsed; 1283115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar final int childWidthMeasureSpec = MeasureSpec.makeSafeMeasureSpec( 1284115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar Math.max(0, MeasureSpec.getSize(parentWidthMeasureSpec) - usedTotal), 1285115a6f4d779c451692d75d2c0a638648d36b9867Yigit Boyar MeasureSpec.UNSPECIFIED); 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void computeScroll() { 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mScroller.computeScrollOffset()) { 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This is called at drawing time by ViewGroup. We don't want to 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // re-show the scrollbars at this point, which scrollTo will do, 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // so we replicate most of scrollTo here. 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It's a little odd to call onScrollChanged from inside the drawing. 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It is, except when you remember that computeScroll() is used to 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // animate scrolling. So unless we want to defer the onScrollChanged() 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // until the end of the animated scrolling, we don't really have a 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // choice here. 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // I agree. The alternative, which I think would be worse, is to post 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // something and tell the subclasses later. This is bad because there 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // will be a window where mScrollX/Y is different from what the app 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // thinks it is. 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldX = mScrollX; 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int oldY = mScrollY; 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int x = mScroller.getCurrX(); 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int y = mScroller.getCurrY(); 131317dfce15d5c3e7eae7a3c129019f48e7c5f65063Adam Powell 1314637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (oldX != x || oldY != y) { 1315e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int range = getScrollRange(); 1316e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final int overscrollMode = getOverScrollMode(); 1317e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || 1318e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0); 1319e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1320e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio overScrollBy(x - oldX, y - oldY, oldX, oldY, range, 0, 1321637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mOverflingDistance, 0, false); 1322637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell onScrollChanged(mScrollX, mScrollY, oldX, oldY); 1323637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1324e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio if (canOverscroll) { 1325637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (x < 0 && oldX >= 0) { 1326637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft.onAbsorb((int) mScroller.getCurrVelocity()); 1327637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else if (x > range && oldX <= range) { 1328637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight.onAbsorb((int) mScroller.getCurrVelocity()); 1329637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 13309d32d24dbd8a015c9d5c44ed4901d5a666eb8e7fAdam Powell } 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1332e9dbef85d36ce4030dae29af0d80db8d6fd0b972Fabrice Di Meglio 1333e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy if (!awakenScrollBars()) { 1334df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1335e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy } 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls the view to the given child. 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child the View to scroll to 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollToChild(View child) { 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getDrawingRect(mTempRect); 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Offset from child's local coordinates to ScrollView coordinates */ 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(child, mTempRect); 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollDelta != 0) { 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(scrollDelta, 0); 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If rect is off screen, scroll just enough to get it (or at least the 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * first screen size chunk of it) on screen. 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rectangle. 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param immediate True to scroll immediately without animation 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if scrolling was performed 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollToChildRect(Rect rect, boolean immediate) { 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int delta = computeScrollDeltaToGetChildRectOnScreen(rect); 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final boolean scroll = delta != 0; 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scroll) { 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (immediate) { 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollBy(delta, 0); 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project smoothScrollBy(delta, 0); 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scroll; 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Compute the amount to scroll in the X direction in order to get 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a rectangle completely on the screen (or, if taller than the screen, 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at least the first screen size chunk of it). 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rect The rect. 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The scroll delta. 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeScrollDeltaToGetChildRectOnScreen(Rect rect) { 1387ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() == 0) return 0; 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = getWidth(); 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenLeft = getScrollX(); 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int screenRight = screenLeft + width; 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fadingEdge = getHorizontalFadingEdgeLength(); 13949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for left fading edge as long as rect isn't at very left 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.left > 0) { 13979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenLeft += fadingEdge; 13989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // leave room for right fading edge as long as rect isn't at very right 14019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.right < getChildAt(0).getWidth()) { 14029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project screenRight -= fadingEdge; 14039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollXDelta = 0; 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.right > screenRight && rect.left > screenLeft) { 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move right to get it in view: move right just enough so 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // that the entire rectangle is in view (or at least the first 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk). 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.width() > width) { 14139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // just enough to get screen size chunk on 14149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta += (rect.left - screenLeft); 14159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // get entire rect at right of screen 14179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta += (rect.right - screenRight); 14189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling beyond the end of our content 1421ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int right = getChildAt(0).getRight(); 14229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distanceToRight = right - screenRight; 14239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta = Math.min(scrollXDelta, distanceToRight); 14249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (rect.left < screenLeft && rect.right < screenRight) { 14269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // need to move right to get it in view: move right just enough so that 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rectangle is in view (or at least the first screen 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // size chunk of it). 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (rect.width() > width) { 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // screen size chunk 14329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta -= (screenRight - rect.right); 14339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // entire rect at left 14359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta -= (screenLeft - rect.left); 14369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make sure we aren't scrolling any further than the left our content 14399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollXDelta = Math.max(scrollXDelta, -getScrollX()); 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollXDelta; 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestChildFocus(View child, View focused) { 14469b24e5c53a04d764acca4f0f865575f0bec5583aAdam Powell if (focused != null && focused.getRevealOnFocusHint()) { 14472fe301db7555bccf53e465436d4cb7442c803df3Adam Powell if (!mIsLayoutDirty) { 14482fe301db7555bccf53e465436d4cb7442c803df3Adam Powell scrollToChild(focused); 14492fe301db7555bccf53e465436d4cb7442c803df3Adam Powell } else { 14502fe301db7555bccf53e465436d4cb7442c803df3Adam Powell // The child may not be laid out yet, we can't compute the scroll yet 14512fe301db7555bccf53e465436d4cb7442c803df3Adam Powell mChildToScrollTo = focused; 14522fe301db7555bccf53e465436d4cb7442c803df3Adam Powell } 14539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestChildFocus(child, focused); 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When looking for focus in children of a scroll view, need to be a little 14609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * more careful not to give focus to something that is scrolled off screen. 14619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 14629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is more expensive than the default {@link android.view.ViewGroup} 14639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * implementation, otherwise this behavior might have been made the default. 14649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean onRequestFocusInDescendants(int direction, 14679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect previouslyFocusedRect) { 14689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // convert from forward / backward notation to up / down / left / right 14709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (ugh). 14719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (direction == View.FOCUS_FORWARD) { 14729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_RIGHT; 14739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (direction == View.FOCUS_BACKWARD) { 14749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project direction = View.FOCUS_LEFT; 14759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View nextFocus = previouslyFocusedRect == null ? 14789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocus(this, null, direction) : 14799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FocusFinder.getInstance().findNextFocusFromRect(this, 14809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project previouslyFocusedRect, direction); 14819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (nextFocus == null) { 14839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 14849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isOffScreen(nextFocus)) { 14879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 14889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return nextFocus.requestFocus(direction, previouslyFocusedRect); 14919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 14949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean requestChildRectangleOnScreen(View child, Rect rectangle, 14959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean immediate) { 14969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // offset into coordinate space of this scroll view 14979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project rectangle.offset(child.getLeft() - child.getScrollX(), 14989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getTop() - child.getScrollY()); 14999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return scrollToChildRect(rectangle, immediate); 15019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 15049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void requestLayout() { 15059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = true; 15069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.requestLayout(); 15079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onLayout(boolean changed, int l, int t, int r, int b) { 1511f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio int childWidth = 0; 1512f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio int childMargins = 0; 1513f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1514f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio if (getChildCount() > 0) { 1515f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio childWidth = getChildAt(0).getMeasuredWidth(); 1516f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio LayoutParams childParams = (LayoutParams) getChildAt(0).getLayoutParams(); 1517f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio childMargins = childParams.leftMargin + childParams.rightMargin; 1518f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio } 1519f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1520c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio final int available = r - l - getPaddingLeftWithForeground() - 1521f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio getPaddingRightWithForeground() - childMargins; 1522f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1523c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio final boolean forceLeftGravity = (childWidth > available); 1524f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 1525c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio layoutChildren(l, t, r, b, forceLeftGravity); 1526f2fb76cc23e18f7b15f7244e6352d024b5008f38Fabrice Di Meglio 15279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsLayoutDirty = false; 15289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Give a child focus if it needs it 15299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mChildToScrollTo != null && isViewDescendantOf(mChildToScrollTo, this)) { 153090f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell scrollToChild(mChildToScrollTo); 15319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChildToScrollTo = null; 15339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15347a46dde1ae56a85fcb5cdac91173424b6355bf3cChet Haase if (!isLaidOut()) { 1535c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio final int scrollRange = Math.max(0, 1536c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio childWidth - (r - l - mPaddingLeft - mPaddingRight)); 1537c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio if (mSavedState != null) { 1538a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell mScrollX = isLayoutRtl() 1539a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell ? scrollRange - mSavedState.scrollOffsetFromStart 1540a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell : mSavedState.scrollOffsetFromStart; 1541fafe88c3d983f1578e096af69ab8420c846b237eFabrice Di Meglio mSavedState = null; 1542c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } else { 1543c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio if (isLayoutRtl()) { 1544c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = scrollRange - mScrollX; 1545c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } // mScrollX default value is "0" for LTR 1546c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1547c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio // Don't forget to clamp 1548c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio if (mScrollX > scrollRange) { 1549c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = scrollRange; 1550c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } else if (mScrollX < 0) { 1551c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mScrollX = 0; 1552c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1553c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1554c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1555f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa // Calling this with the present values causes it to re-claim them 15569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollTo(mScrollX, mScrollY); 15579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 15609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onSizeChanged(int w, int h, int oldw, int oldh) { 15619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onSizeChanged(w, h, oldw, oldh); 15629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View currentFocused = findFocus(); 15649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (null == currentFocused || this == currentFocused) 15659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 15669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int maxJump = mRight - mLeft; 15689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isWithinDeltaOfScreen(currentFocused, maxJump)) { 15709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project currentFocused.getDrawingRect(mTempRect); 15719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetDescendantRectToMyCoords(currentFocused, mTempRect); 15729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollDelta = computeScrollDeltaToGetChildRectOnScreen(mTempRect); 15739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doScrollX(scrollDelta); 15749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1578f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa * Return true if child is a descendant of parent, (or equal to the parent). 15799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1580e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static boolean isViewDescendantOf(View child, View parent) { 15819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == parent) { 15829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 15839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final ViewParent theParent = child.getParent(); 15869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (theParent instanceof ViewGroup) && isViewDescendantOf((View) theParent, parent); 15879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Fling the scroll view 15919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 15929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param velocityX The initial velocity in the X direction. Positive 1593f76a50ce8fdc6aea22cabc77b2977a1a15a79630Ken Wakasa * numbers mean that the finger/cursor is moving down the screen, 15949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * which means we want to scroll towards the left. 15959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 15969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void fling(int velocityX) { 1597ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (getChildCount() > 0) { 1598ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int width = getWidth() - mPaddingRight - mPaddingLeft; 1599ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy int right = getChildAt(0).getWidth(); 16004e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 16014e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira mScroller.fling(mScrollX, mScrollY, velocityX, 0, 0, 1602637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell Math.max(0, right - width), 0, 0, width/2, 0); 16034e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1604ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy final boolean movingRight = velocityX > 0; 16054e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 16062ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne View currentFocused = findFocus(); 1607ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy View newFocused = findFocusableViewInMyBounds(movingRight, 16082ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne mScroller.getFinalX(), currentFocused); 16094e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1610ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy if (newFocused == null) { 1611ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy newFocused = this; 1612ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 16134e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 16142ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne if (newFocused != currentFocused) { 16152ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne newFocused.requestFocus(movingRight ? View.FOCUS_RIGHT : View.FOCUS_LEFT); 1616ef0e9ae0ddbf70f5e30fbfbffe379e3026b9dc13Romain Guy } 16174e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira 1618df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 16199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 16229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 16239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 16249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 16259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>This version also clamps the scrolling to the bounds of our child. 16269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 16272ed2eacd7e0569675410f1e62238b708c5dcc8acGilles Debunne @Override 16289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void scrollTo(int x, int y) { 16299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we rely on the fact the View.scrollBy calls scrollTo. 16309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() > 0) { 16319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(0); 16329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project x = clamp(x, getWidth() - mPaddingRight - mPaddingLeft, child.getWidth()); 16339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project y = clamp(y, getHeight() - mPaddingBottom - mPaddingTop, child.getHeight()); 16349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (x != mScrollX || y != mScrollY) { 16359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.scrollTo(x, y); 16369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1640637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1641637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void setOverScrollMode(int mode) { 1642637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mode != OVER_SCROLL_NEVER) { 1643637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft == null) { 16444e30d89ceda832300f80bf73f4f58cd2b51bf112Mindy Pereira Context context = getContext(); 164589935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowLeft = new EdgeEffect(context); 164689935e41c593a599e8955388b27fb926e60e5e94Adam Powell mEdgeGlowRight = new EdgeEffect(context); 1647637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1648637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } else { 1649637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowLeft = null; 1650637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell mEdgeGlowRight = null; 1651637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1652637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.setOverScrollMode(mode); 1653637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1654637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 16552243e555b061254f7f0f72ca1d6cd44db6c266faRomain Guy @SuppressWarnings({"SuspiciousNameCombination"}) 1656637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell @Override 1657637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell public void draw(Canvas canvas) { 1658637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell super.draw(canvas); 1659637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft != null) { 1660637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int scrollX = mScrollX; 1661637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowLeft.isFinished()) { 1662637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 16637d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int height = getHeight() - mPaddingTop - mPaddingBottom; 1664637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1665637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(270); 16667d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(-height + mPaddingTop, Math.min(0, scrollX)); 16677d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell mEdgeGlowLeft.setSize(height, getWidth()); 1668637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowLeft.draw(canvas)) { 1669df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1670637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1671637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1672637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1673637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (!mEdgeGlowRight.isFinished()) { 1674637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int restoreCount = canvas.save(); 1675637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell final int width = getWidth(); 16767d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell final int height = getHeight() - mPaddingTop - mPaddingBottom; 1677637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1678637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.rotate(90); 16797d86378b0c3a02499a5a9aab35851424ffa57bd8Adam Powell canvas.translate(-mPaddingTop, 1680b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira -(Math.max(getScrollRange(), scrollX) + width)); 1681b1297f76351795822c64236c4ce27b97d18e5bcaMindy Pereira mEdgeGlowRight.setSize(height, width); 1682637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell if (mEdgeGlowRight.draw(canvas)) { 1683df3ae4f3aea3bdce6bb54133c8a07a26bf207c3cAdam Powell postInvalidateOnAnimation(); 1684637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1685637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell canvas.restoreToCount(restoreCount); 1686637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1687637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1688637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell } 1689637d337b58d8eec6de19230a5dd5ca5581c0478dAdam Powell 1690e979e62ac7313b7cffe9b131bb8a99c356068b45Romain Guy private static int clamp(int n, int my, int child) { 16919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (my >= child || n < 0) { 16929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 16939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((my + n) > child) { 16959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child - my; 16969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return n; 16989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1699c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1700c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1701c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio protected void onRestoreInstanceState(Parcelable state) { 170290f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell if (mContext.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.JELLY_BEAN_MR2) { 170390f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Some old apps reused IDs in ways they shouldn't have. 170490f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Don't break them, but they don't get scroll state restoration. 170590f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell super.onRestoreInstanceState(state); 170690f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell return; 170790f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell } 1708c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio SavedState ss = (SavedState) state; 1709c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super.onRestoreInstanceState(ss.getSuperState()); 1710c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio mSavedState = ss; 1711c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio requestLayout(); 1712c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1713c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1714c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1715c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio protected Parcelable onSaveInstanceState() { 171690f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell if (mContext.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.JELLY_BEAN_MR2) { 171790f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Some old apps reused IDs in ways they shouldn't have. 171890f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell // Don't break them, but they don't get scroll state restoration. 171990f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell return super.onSaveInstanceState(); 172090f339a5a343f82c3c32e4467c54ded94a1807a1Adam Powell } 1721c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio Parcelable superState = super.onSaveInstanceState(); 1722c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio SavedState ss = new SavedState(superState); 1723a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell ss.scrollOffsetFromStart = isLayoutRtl() ? -mScrollX : mScrollX; 1724c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return ss; 1725c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1726c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 172794a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy /** @hide */ 172894a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy @Override 172994a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy protected void encodeProperties(@NonNull ViewHierarchyEncoder encoder) { 173094a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy super.encodeProperties(encoder); 173194a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy encoder.addProperty("layout:fillViewPort", mFillViewport); 173294a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy } 173394a6d15ede149189bba9e5f474ed853c98230e75Siva Velusamy 1734c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio static class SavedState extends BaseSavedState { 1735a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell public int scrollOffsetFromStart; 1736c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1737c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio SavedState(Parcelable superState) { 1738c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super(superState); 1739c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1740c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1741c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public SavedState(Parcel source) { 1742c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super(source); 1743a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell scrollOffsetFromStart = source.readInt(); 1744c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1745c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1746c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1747c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public void writeToParcel(Parcel dest, int flags) { 1748c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio super.writeToParcel(dest, flags); 1749a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell dest.writeInt(scrollOffsetFromStart); 1750c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1751c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1752c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio @Override 1753c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public String toString() { 1754c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return "HorizontalScrollView.SavedState{" 1755c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio + Integer.toHexString(System.identityHashCode(this)) 1756a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell + " scrollPosition=" + scrollOffsetFromStart 1757a3aa6d827860a27217b147aca6baf44fe14d1db3Adam Powell + "}"; 1758c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1759c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1760c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public static final Parcelable.Creator<SavedState> CREATOR 1761c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio = new Parcelable.Creator<SavedState>() { 1762c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public SavedState createFromParcel(Parcel in) { 1763c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return new SavedState(in); 1764c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1765c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio 1766c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio public SavedState[] newArray(int size) { 1767c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio return new SavedState[size]; 1768c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 1769c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio }; 1770c4d712237cba31d0f34c6b96ea3533d4a8e1f028Fabrice Di Meglio } 17719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1772