19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 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 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.annotation.Widget; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Rect; 2348d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganovimport android.os.Bundle; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.Log; 263d0124f1764e57b18161b833b52964f3141243d1Doug Feltimport android.view.ContextMenu.ContextMenuInfo; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.GestureDetector; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.Gravity; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.HapticFeedbackConstants; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.KeyEvent; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.MotionEvent; 323d0124f1764e57b18161b833b52964f3141243d1Doug Feltimport android.view.SoundEffectConstants; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewConfiguration; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 368a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganovimport android.view.accessibility.AccessibilityEvent; 378a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganovimport android.view.accessibility.AccessibilityNodeInfo; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.animation.Transformation; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 403d0124f1764e57b18161b833b52964f3141243d1Doug Feltimport com.android.internal.R; 413d0124f1764e57b18161b833b52964f3141243d1Doug Felt 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A view that shows items in a center-locked, horizontally scrolling list. 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The default values for the Gallery assume you will be using 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.R.styleable#Theme_galleryItemBackground} as the background for 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * each View given to the Gallery from the Adapter. If you are not doing this, 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may need to adjust some Gallery properties, such as the spacing. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Views given to the Gallery should use {@link Gallery.LayoutParams} as their 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout parameters type. 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_animationDuration 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_spacing 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_gravity 565a418c771db08b1660095dfb712d2f159f700968Romain Guy * 57d2aed40a37f202cc2b88d77c44fa359bfbd10520Romain Guy * @deprecated This widget is no longer supported. Other horizontally scrolling 58d2aed40a37f202cc2b88d77c44fa359bfbd10520Romain Guy * widgets include {@link HorizontalScrollView} and {@link android.support.v4.view.ViewPager} 59d2aed40a37f202cc2b88d77c44fa359bfbd10520Romain Guy * from the support library. 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 615a418c771db08b1660095dfb712d2f159f700968Romain Guy@Deprecated 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project@Widget 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class Gallery extends AbsSpinner implements GestureDetector.OnGestureListener { 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String TAG = "Gallery"; 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 678c11e31143726c9457280c6c0ec83472763c0de9Romain Guy private static final boolean localLOGV = false; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Duration in milliseconds from the start of a scroll during which we're 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * unsure whether the user is scrolling or flinging. 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int SCROLL_TO_FLING_UNCERTAINTY_TIMEOUT = 250; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Horizontal spacing between items. 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mSpacing = 0; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * How long the transition animation should run when a child view changes 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position, measured in milliseconds. 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mAnimationDuration = 400; 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The alpha of items that are not selected. 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mUnselectedAlpha; 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Left most edge of a child seen so far during layout. 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mLeftMost; 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Right most edge of a child seen so far during layout. 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mRightMost; 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mGravity; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helper for detecting touch gestures. 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private GestureDetector mGestureDetector; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The position of the item that received the user's down touch. 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mDownTouchPosition; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The view of the item that received the user's down touch. 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mDownTouchView; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Executes the delta scrolls from a fling or scroll movement. 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private FlingRunnable mFlingRunnable = new FlingRunnable(); 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets mSuppressSelectionChanged = false. This is used to set it to false 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * in the future. It will also trigger a selection changed. 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Runnable mDisableSuppressSelectionChangedRunnable = new Runnable() { 1283d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSuppressSelectionChanged = false; 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectionChanged(); 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When fling runnable runs, it resets this to false. Any method along the 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * path until the end of its run() can set this to true to abort any 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * remaining fling. For example, if we've reached either the leftmost or 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * rightmost item, we will set this to true. 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mShouldStopFling; 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The currently selected item's child. 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mSelectedChild; 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether to continuously callback on the item selected listener during a 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * fling. 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mShouldCallbackDuringFling = true; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether to callback when an item that is not selected is clicked. 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mShouldCallbackOnUnselectedItemClick = true; 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If true, do not callback to item selected listener. 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mSuppressSelectionChanged; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If true, we have received the "invoke" (center or enter buttons) key 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down. This is checked before we action on the "invoke" key up, and is 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * subsequently cleared. 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mReceivedInvokeKeyDown; 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private AdapterContextMenuInfo mContextMenuInfo; 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If true, this onScroll is the first for this user's drag (remember, a 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drag sends many onScrolls). 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsFirstScroll; 1783d0124f1764e57b18161b833b52964f3141243d1Doug Felt 1793d0124f1764e57b18161b833b52964f3141243d1Doug Felt /** 1803d0124f1764e57b18161b833b52964f3141243d1Doug Felt * If true, mFirstPosition is the position of the rightmost child, and 1813d0124f1764e57b18161b833b52964f3141243d1Doug Felt * the children are ordered right to left. 1823d0124f1764e57b18161b833b52964f3141243d1Doug Felt */ 1833d0124f1764e57b18161b833b52964f3141243d1Doug Felt private boolean mIsRtl = true; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Gallery(Context context) { 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Gallery(Context context, AttributeSet attrs) { 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, R.attr.galleryStyle); 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Gallery(Context context, AttributeSet attrs, int defStyle) { 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGestureDetector = new GestureDetector(context, this); 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGestureDetector.setIsLongpressEnabled(true); 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = context.obtainStyledAttributes( 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project attrs, com.android.internal.R.styleable.Gallery, defStyle, 0); 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int index = a.getInt(com.android.internal.R.styleable.Gallery_gravity, -1); 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0) { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setGravity(index); 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int animationDuration = 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.getInt(com.android.internal.R.styleable.Gallery_animationDuration, -1); 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (animationDuration > 0) { 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setAnimationDuration(animationDuration); 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spacing = 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.getDimensionPixelOffset(com.android.internal.R.styleable.Gallery_spacing, 0); 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSpacing(spacing); 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float unselectedAlpha = a.getFloat( 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.Gallery_unselectedAlpha, 0.5f); 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setUnselectedAlpha(unselectedAlpha); 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We draw the selected item last (because otherwise the item to the 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // right overlaps it) 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGroupFlags |= FLAG_USE_CHILD_DRAWING_ORDER; 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGroupFlags |= FLAG_SUPPORT_STATIC_TRANSFORMATIONS; 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether or not to callback on any {@link #getOnItemSelectedListener()} 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * while the items are being flinged. If false, only the final selected item 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will cause the callback. If true, all items between the first and the 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * final will cause callbacks. 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param shouldCallback Whether or not to callback on the listener while 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the items are being flinged. 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setCallbackDuringFling(boolean shouldCallback) { 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldCallbackDuringFling = shouldCallback; 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether or not to callback when an item that is not selected is clicked. 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If false, the item will become selected (and re-centered). If true, the 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #getOnItemClickListener()} will get the callback. 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param shouldCallback Whether or not to callback on the listener when a 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * item that is not selected is clicked. 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setCallbackOnUnselectedItemClick(boolean shouldCallback) { 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldCallbackOnUnselectedItemClick = shouldCallback; 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets how long the transition animation should run when a child view 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * changes position. Only relevant if animation is turned on. 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param animationDurationMillis The duration of the transition, in 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * milliseconds. 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_animationDuration 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setAnimationDuration(int animationDurationMillis) { 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAnimationDuration = animationDurationMillis; 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the spacing between items in a Gallery 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param spacing The spacing in pixels between items in the Gallery 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_spacing 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSpacing(int spacing) { 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpacing = spacing; 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the alpha of items that are not selected in the Gallery. 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param unselectedAlpha the alpha for the items that are not selected. 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_unselectedAlpha 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setUnselectedAlpha(float unselectedAlpha) { 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mUnselectedAlpha = unselectedAlpha; 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean getChildStaticTransformation(View child, Transformation t) { 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project t.clear(); 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project t.setAlpha(child == mSelectedChild ? 1.0f : mUnselectedAlpha); 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollExtent() { 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Only 1 item is considered to be selected 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1; 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollOffset() { 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Current scroll position is the same as the selected position 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSelectedPosition; 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollRange() { 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Scroll range is the same as the item count 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mItemCount; 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return p instanceof LayoutParams; 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new LayoutParams(p); 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) { 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new LayoutParams(getContext(), attrs); 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected ViewGroup.LayoutParams generateDefaultLayoutParams() { 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gallery expects Gallery.LayoutParams. 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new Gallery.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT); 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onLayout(boolean changed, int l, int t, int r, int b) { 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onLayout(changed, l, t, r, b); 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remember that we are in layout to prevent more layout request from 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being generated. 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = true; 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layout(0, false); 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = false; 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int getChildHeight(View child) { 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child.getMeasuredHeight(); 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 359a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Tracks a motion scroll. In reality, this is used to do just about any 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * movement to items (touch scroll, arrow-key scroll, set an item as selected). 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param deltaX Change in X from the previous event. 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void trackMotionScroll(int deltaX) { 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean toLeft = deltaX < 0; 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int limitedDeltaX = getLimitedMotionScrollAmount(toLeft, deltaX); 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (limitedDeltaX != deltaX) { 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The above call returned a limited amount, so stop any scrolls/flings 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.endFling(false); 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onFinishedMovement(); 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenLeftAndRight(limitedDeltaX); 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachOffScreenChildren(toLeft); 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (toLeft) { 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If moved left, there will be empty space on the right 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryRight(); 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Similarly, empty space on the left 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryLeft(); 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear unused views 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.clear(); 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionToCenterChild(); 397a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 398a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov onScrollChanged(0, 0, 0, 0); // dummy values, View's implementation does not use these. 399a0156177cdc809795dd8bc5a19943dd2b6f82b66Svetoslav Ganov 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int getLimitedMotionScrollAmount(boolean motionToLeft, int deltaX) { 4043d0124f1764e57b18161b833b52964f3141243d1Doug Felt int extremeItemPosition = motionToLeft != mIsRtl ? mItemCount - 1 : 0; 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View extremeChild = getChildAt(extremeItemPosition - mFirstPosition); 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (extremeChild == null) { 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return deltaX; 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int extremeChildCenter = getCenterOfView(extremeChild); 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryCenter = getCenterOfGallery(); 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (motionToLeft) { 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (extremeChildCenter <= galleryCenter) { 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The extreme child is past his boundary point! 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (extremeChildCenter >= galleryCenter) { 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The extreme child is past his boundary point! 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int centerDifference = galleryCenter - extremeChildCenter; 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return motionToLeft 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ? Math.max(centerDifference, deltaX) 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : Math.min(centerDifference, deltaX); 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Offset the horizontal location of all children of this view by the 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified number of pixels. 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset the number of pixels to offset 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void offsetChildrenLeftAndRight(int offset) { 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = getChildCount() - 1; i >= 0; i--) { 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChildAt(i).offsetLeftAndRight(offset); 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The center of this Gallery. 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getCenterOfGallery() { 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (getWidth() - mPaddingLeft - mPaddingRight) / 2 + mPaddingLeft; 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The center of the given view. 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static int getCenterOfView(View view) { 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view.getLeft() + view.getWidth() / 2; 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Detaches children that are off the screen (i.e.: Gallery bounds). 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toLeft Whether to detach children to the left of the Gallery, or 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the right. 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void detachOffScreenChildren(boolean toLeft) { 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numChildren = getChildCount(); 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int firstPosition = mFirstPosition; 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int start = 0; 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = 0; 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (toLeft) { 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int galleryLeft = mPaddingLeft; 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numChildren; i++) { 4763d0124f1764e57b18161b833b52964f3141243d1Doug Felt int n = mIsRtl ? (numChildren - 1 - i) : i; 4773d0124f1764e57b18161b833b52964f3141243d1Doug Felt final View child = getChildAt(n); 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getRight() >= galleryLeft) { 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4813d0124f1764e57b18161b833b52964f3141243d1Doug Felt start = n; 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count++; 4833d0124f1764e57b18161b833b52964f3141243d1Doug Felt mRecycler.put(firstPosition + n, child); 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4863d0124f1764e57b18161b833b52964f3141243d1Doug Felt if (!mIsRtl) { 4873d0124f1764e57b18161b833b52964f3141243d1Doug Felt start = 0; 4883d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int galleryRight = getWidth() - mPaddingRight; 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = numChildren - 1; i >= 0; i--) { 4923d0124f1764e57b18161b833b52964f3141243d1Doug Felt int n = mIsRtl ? numChildren - 1 - i : i; 4933d0124f1764e57b18161b833b52964f3141243d1Doug Felt final View child = getChildAt(n); 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getLeft() <= galleryRight) { 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4973d0124f1764e57b18161b833b52964f3141243d1Doug Felt start = n; 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count++; 4993d0124f1764e57b18161b833b52964f3141243d1Doug Felt mRecycler.put(firstPosition + n, child); 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5023d0124f1764e57b18161b833b52964f3141243d1Doug Felt if (mIsRtl) { 5033d0124f1764e57b18161b833b52964f3141243d1Doug Felt start = 0; 5043d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachViewsFromParent(start, count); 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5093d0124f1764e57b18161b833b52964f3141243d1Doug Felt if (toLeft != mIsRtl) { 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition += count; 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls the items so that the selected item is in its 'slot' (its center 5169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is the gallery's center). 5179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollIntoSlots() { 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0 || mSelectedChild == null) return; 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedCenter = getCenterOfView(mSelectedChild); 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int targetCenter = getCenterOfGallery(); 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollAmount = targetCenter - selectedCenter; 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollAmount != 0) { 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.startUsingDistance(scrollAmount); 5289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onFinishedMovement(); 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void onFinishedMovement() { 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSuppressSelectionChanged) { 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSuppressSelectionChanged = false; 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We haven't been callbacking during the fling, so do it now 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.selectionChanged(); 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5408c11e31143726c9457280c6c0ec83472763c0de9Romain Guy invalidate(); 5419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void selectionChanged() { 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mSuppressSelectionChanged) { 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.selectionChanged(); 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Looks for the child that is closest to the center and sets it as the 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selected child. 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void setSelectionToCenterChild() { 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selView = mSelectedChild; 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedChild == null) return; 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryCenter = getCenterOfGallery(); 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5618c11e31143726c9457280c6c0ec83472763c0de9Romain Guy // Common case where the current selected position is correct 5628c11e31143726c9457280c6c0ec83472763c0de9Romain Guy if (selView.getLeft() <= galleryCenter && selView.getRight() >= galleryCenter) { 5638c11e31143726c9457280c6c0ec83472763c0de9Romain Guy return; 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // TODO better search 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int closestEdgeDistance = Integer.MAX_VALUE; 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newSelectedChildIndex = 0; 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = getChildCount() - 1; i >= 0; i--) { 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(i); 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getLeft() <= galleryCenter && child.getRight() >= galleryCenter) { 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This child is in the center 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSelectedChildIndex = i; 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childClosestEdgeDistance = Math.min(Math.abs(child.getLeft() - galleryCenter), 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Math.abs(child.getRight() - galleryCenter)); 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childClosestEdgeDistance < closestEdgeDistance) { 5829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closestEdgeDistance = childClosestEdgeDistance; 5839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSelectedChildIndex = i; 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newPos = mFirstPosition + newSelectedChildIndex; 5889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newPos != mSelectedPosition) { 5909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(newPos); 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(newPos); 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates and positions all views for this Gallery. 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We layout rarely, most of the time {@link #trackMotionScroll(int)} takes 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * care of repositioning, adding, and removing children. 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta Change in the selected position. +1 means the selection is 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * moving to the right, so views are scrolling to the left. -1 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * means the selection is moving to the left. 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void layout(int delta, boolean animate) { 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6093d0124f1764e57b18161b833b52964f3141243d1Doug Felt mIsRtl = isLayoutRtl(); 6103d0124f1764e57b18161b833b52964f3141243d1Doug Felt 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenLeft = mSpinnerPadding.left; 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenWidth = mRight - mLeft - mSpinnerPadding.left - mSpinnerPadding.right; 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDataChanged) { 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleDataChanged(); 6169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Handle an empty gallery by removing all views. 6199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 6209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 6219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 6229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Update to the new selected position. 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNextSelectedPosition >= 0) { 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(mNextSelectedPosition); 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // All views go in recycler while we are in layout 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleAllViews(); 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear out old views 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //removeAllViewsInLayout(); 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachAllViewsFromParent(); 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * These will be used to give initial positions to views entering the 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * gallery as we scroll 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRightMost = 0; 6419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLeftMost = 0; 6429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make selected view and center it 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mFirstPosition will be decreased as we add views to the left later 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * on. The 0 for x will be offset in a couple lines down. 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = mSelectedPosition; 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel = makeAndAddView(mSelectedPosition, 0, 0, true); 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Put the selected child in the center 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedOffset = childrenLeft + (childrenWidth / 2) - (sel.getWidth() / 2); 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetLeftAndRight(selectedOffset); 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryRight(); 6579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryLeft(); 6589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Flush any cached views that did not get reused above 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.clear(); 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataChanged = false; 6669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNeedSync = false; 6679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(mSelectedPosition); 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project updateSelectedItemMetadata(); 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void fillToGalleryLeft() { 6733d0124f1764e57b18161b833b52964f3141243d1Doug Felt if (mIsRtl) { 6743d0124f1764e57b18161b833b52964f3141243d1Doug Felt fillToGalleryLeftRtl(); 6753d0124f1764e57b18161b833b52964f3141243d1Doug Felt } else { 6763d0124f1764e57b18161b833b52964f3141243d1Doug Felt fillToGalleryLeftLtr(); 6773d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 6783d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 6793d0124f1764e57b18161b833b52964f3141243d1Doug Felt 6803d0124f1764e57b18161b833b52964f3141243d1Doug Felt private void fillToGalleryLeftRtl() { 6813d0124f1764e57b18161b833b52964f3141243d1Doug Felt int itemSpacing = mSpacing; 6823d0124f1764e57b18161b833b52964f3141243d1Doug Felt int galleryLeft = mPaddingLeft; 6833d0124f1764e57b18161b833b52964f3141243d1Doug Felt int numChildren = getChildCount(); 6843d0124f1764e57b18161b833b52964f3141243d1Doug Felt int numItems = mItemCount; 6853d0124f1764e57b18161b833b52964f3141243d1Doug Felt 6863d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Set state for initial iteration 6873d0124f1764e57b18161b833b52964f3141243d1Doug Felt View prevIterationView = getChildAt(numChildren - 1); 6883d0124f1764e57b18161b833b52964f3141243d1Doug Felt int curPosition; 6893d0124f1764e57b18161b833b52964f3141243d1Doug Felt int curRightEdge; 6903d0124f1764e57b18161b833b52964f3141243d1Doug Felt 6913d0124f1764e57b18161b833b52964f3141243d1Doug Felt if (prevIterationView != null) { 6923d0124f1764e57b18161b833b52964f3141243d1Doug Felt curPosition = mFirstPosition + numChildren; 6933d0124f1764e57b18161b833b52964f3141243d1Doug Felt curRightEdge = prevIterationView.getLeft() - itemSpacing; 6943d0124f1764e57b18161b833b52964f3141243d1Doug Felt } else { 6953d0124f1764e57b18161b833b52964f3141243d1Doug Felt // No children available! 6963d0124f1764e57b18161b833b52964f3141243d1Doug Felt mFirstPosition = curPosition = mItemCount - 1; 6973d0124f1764e57b18161b833b52964f3141243d1Doug Felt curRightEdge = mRight - mLeft - mPaddingRight; 6983d0124f1764e57b18161b833b52964f3141243d1Doug Felt mShouldStopFling = true; 6993d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7003d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7013d0124f1764e57b18161b833b52964f3141243d1Doug Felt while (curRightEdge > galleryLeft && curPosition < mItemCount) { 7023d0124f1764e57b18161b833b52964f3141243d1Doug Felt prevIterationView = makeAndAddView(curPosition, curPosition - mSelectedPosition, 7033d0124f1764e57b18161b833b52964f3141243d1Doug Felt curRightEdge, false); 7043d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7053d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Set state for next iteration 7063d0124f1764e57b18161b833b52964f3141243d1Doug Felt curRightEdge = prevIterationView.getLeft() - itemSpacing; 7073d0124f1764e57b18161b833b52964f3141243d1Doug Felt curPosition++; 7083d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7093d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7103d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7113d0124f1764e57b18161b833b52964f3141243d1Doug Felt private void fillToGalleryLeftLtr() { 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int itemSpacing = mSpacing; 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryLeft = mPaddingLeft; 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for initial iteration 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View prevIterationView = getChildAt(0); 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curPosition; 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curRightEdge; 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (prevIterationView != null) { 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition = mFirstPosition - 1; 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge = prevIterationView.getLeft() - itemSpacing; 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // No children available! 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition = 0; 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge = mRight - mLeft - mPaddingRight; 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldStopFling = true; 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (curRightEdge > galleryLeft && curPosition >= 0) { 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevIterationView = makeAndAddView(curPosition, curPosition - mSelectedPosition, 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge, false); 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember some state 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = curPosition; 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for next iteration 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge = prevIterationView.getLeft() - itemSpacing; 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition--; 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void fillToGalleryRight() { 7443d0124f1764e57b18161b833b52964f3141243d1Doug Felt if (mIsRtl) { 7453d0124f1764e57b18161b833b52964f3141243d1Doug Felt fillToGalleryRightRtl(); 7463d0124f1764e57b18161b833b52964f3141243d1Doug Felt } else { 7473d0124f1764e57b18161b833b52964f3141243d1Doug Felt fillToGalleryRightLtr(); 7483d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7493d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7503d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7513d0124f1764e57b18161b833b52964f3141243d1Doug Felt private void fillToGalleryRightRtl() { 7523d0124f1764e57b18161b833b52964f3141243d1Doug Felt int itemSpacing = mSpacing; 7533d0124f1764e57b18161b833b52964f3141243d1Doug Felt int galleryRight = mRight - mLeft - mPaddingRight; 7543d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7553d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Set state for initial iteration 7563d0124f1764e57b18161b833b52964f3141243d1Doug Felt View prevIterationView = getChildAt(0); 7573d0124f1764e57b18161b833b52964f3141243d1Doug Felt int curPosition; 7583d0124f1764e57b18161b833b52964f3141243d1Doug Felt int curLeftEdge; 7593d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7603d0124f1764e57b18161b833b52964f3141243d1Doug Felt if (prevIterationView != null) { 7613d0124f1764e57b18161b833b52964f3141243d1Doug Felt curPosition = mFirstPosition -1; 7623d0124f1764e57b18161b833b52964f3141243d1Doug Felt curLeftEdge = prevIterationView.getRight() + itemSpacing; 7633d0124f1764e57b18161b833b52964f3141243d1Doug Felt } else { 7643d0124f1764e57b18161b833b52964f3141243d1Doug Felt curPosition = 0; 7653d0124f1764e57b18161b833b52964f3141243d1Doug Felt curLeftEdge = mPaddingLeft; 7663d0124f1764e57b18161b833b52964f3141243d1Doug Felt mShouldStopFling = true; 7673d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7683d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7693d0124f1764e57b18161b833b52964f3141243d1Doug Felt while (curLeftEdge < galleryRight && curPosition >= 0) { 7703d0124f1764e57b18161b833b52964f3141243d1Doug Felt prevIterationView = makeAndAddView(curPosition, curPosition - mSelectedPosition, 7713d0124f1764e57b18161b833b52964f3141243d1Doug Felt curLeftEdge, true); 7723d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7733d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Remember some state 7743d0124f1764e57b18161b833b52964f3141243d1Doug Felt mFirstPosition = curPosition; 7753d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7763d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Set state for next iteration 7773d0124f1764e57b18161b833b52964f3141243d1Doug Felt curLeftEdge = prevIterationView.getRight() + itemSpacing; 7783d0124f1764e57b18161b833b52964f3141243d1Doug Felt curPosition--; 7793d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7803d0124f1764e57b18161b833b52964f3141243d1Doug Felt } 7813d0124f1764e57b18161b833b52964f3141243d1Doug Felt 7823d0124f1764e57b18161b833b52964f3141243d1Doug Felt private void fillToGalleryRightLtr() { 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int itemSpacing = mSpacing; 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryRight = mRight - mLeft - mPaddingRight; 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numChildren = getChildCount(); 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numItems = mItemCount; 7879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for initial iteration 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View prevIterationView = getChildAt(numChildren - 1); 7909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curPosition; 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curLeftEdge; 7929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (prevIterationView != null) { 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition = mFirstPosition + numChildren; 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge = prevIterationView.getRight() + itemSpacing; 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = curPosition = mItemCount - 1; 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge = mPaddingLeft; 7999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldStopFling = true; 8009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (curLeftEdge < galleryRight && curPosition < numItems) { 8039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevIterationView = makeAndAddView(curPosition, curPosition - mSelectedPosition, 8049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge, true); 8059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for next iteration 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge = prevIterationView.getRight() + itemSpacing; 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition++; 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Obtain a view, either by pulling an existing view from the recycler or by 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * getting a new one from the adapter. If we are animating, make sure there 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is enough information in the view's layout parameters to animate from the 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * old to new positions. 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Position in the gallery for the view to obtain 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset Offset from the selected position 8203d0124f1764e57b18161b833b52964f3141243d1Doug Felt * @param x X-coordinate indicating where this view should be placed. This 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will either be the left or right edge of the view, depending on 8223d0124f1764e57b18161b833b52964f3141243d1Doug Felt * the fromLeft parameter 8233d0124f1764e57b18161b833b52964f3141243d1Doug Felt * @param fromLeft Are we positioning views based on the left edge? (i.e., 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * building from left to right)? 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return A view that has been added to the gallery 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8273d0124f1764e57b18161b833b52964f3141243d1Doug Felt private View makeAndAddView(int position, int offset, int x, boolean fromLeft) { 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mDataChanged) { 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = mRecycler.get(position); 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Can reuse an existing view 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childLeft = child.getLeft(); 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember left and right edges of where views have been placed 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRightMost = Math.max(mRightMost, childLeft 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + child.getMeasuredWidth()); 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLeftMost = Math.min(mLeftMost, childLeft); 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Position the view 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setUpChild(child, offset, x, fromLeft); 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing found in the recycler -- ask the adapter for a view 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = mAdapter.getView(position, null, this); 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Position the view 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setUpChild(child, offset, x, fromLeft); 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helper for makeAndAddView to set the position of a view and fill out its 8593d0124f1764e57b18161b833b52964f3141243d1Doug Felt * layout parameters. 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The view to position 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset Offset from the selected position 8633d0124f1764e57b18161b833b52964f3141243d1Doug Felt * @param x X-coordinate indicating where this view should be placed. This 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will either be the left or right edge of the view, depending on 8653d0124f1764e57b18161b833b52964f3141243d1Doug Felt * the fromLeft parameter 8663d0124f1764e57b18161b833b52964f3141243d1Doug Felt * @param fromLeft Are we positioning views based on the left edge? (i.e., 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * building from left to right)? 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void setUpChild(View child, int offset, int x, boolean fromLeft) { 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Respect layout params that are already in the view. Otherwise 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make some up... 8733d0124f1764e57b18161b833b52964f3141243d1Doug Felt Gallery.LayoutParams lp = (Gallery.LayoutParams) child.getLayoutParams(); 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lp == null) { 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp = (Gallery.LayoutParams) generateDefaultLayoutParams(); 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8783d0124f1764e57b18161b833b52964f3141243d1Doug Felt addViewInLayout(child, fromLeft != mIsRtl ? -1 : 0, lp); 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setSelected(offset == 0); 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get measure specs 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec = ViewGroup.getChildMeasureSpec(mHeightMeasureSpec, 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpinnerPadding.top + mSpinnerPadding.bottom, lp.height); 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpinnerPadding.left + mSpinnerPadding.right, lp.width); 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Measure child 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childLeft; 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childRight; 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Position vertically based on gravity setting 8958c11e31143726c9457280c6c0ec83472763c0de9Romain Guy int childTop = calculateTop(child, true); 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childBottom = childTop + child.getMeasuredHeight(); 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = child.getMeasuredWidth(); 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fromLeft) { 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childLeft = x; 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childRight = childLeft + width; 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childLeft = x - width; 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childRight = x; 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childLeft, childTop, childRight, childBottom); 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Figure out vertical placement based on mGravity 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child Child to place 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Where the top of the child should be 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9168c11e31143726c9457280c6c0ec83472763c0de9Romain Guy private int calculateTop(View child, boolean duringLayout) { 917189ee18d6c6483ad63cc864267328259e2e00b95Dianne Hackborn int myHeight = duringLayout ? getMeasuredHeight() : getHeight(); 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeight = duringLayout ? child.getMeasuredHeight() : child.getHeight(); 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childTop = 0; 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mGravity) { 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case Gravity.TOP: 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childTop = mSpinnerPadding.top; 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case Gravity.CENTER_VERTICAL: 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int availableSpace = myHeight - mSpinnerPadding.bottom 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project - mSpinnerPadding.top - childHeight; 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childTop = mSpinnerPadding.top + (availableSpace / 2); 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case Gravity.BOTTOM: 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childTop = myHeight - mSpinnerPadding.bottom - childHeight; 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return childTop; 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent event) { 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Give everything to the gesture detector 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean retValue = mGestureDetector.onTouchEvent(event); 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int action = event.getAction(); 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (action == MotionEvent.ACTION_UP) { 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Helper method for lifted finger 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onUp(); 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (action == MotionEvent.ACTION_CANCEL) { 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onCancel(); 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return retValue; 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9553d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onSingleTapUp(MotionEvent e) { 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDownTouchPosition >= 0) { 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // An item tap should make it selected, so scroll to this child. 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollToChild(mDownTouchPosition - mFirstPosition); 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Also pass the click so the client knows, if it wants to. 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mShouldCallbackOnUnselectedItemClick || mDownTouchPosition == mSelectedPosition) { 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performItemClick(mDownTouchView, mDownTouchPosition, mAdapter 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project .getItemId(mDownTouchPosition)); 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9753d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mShouldCallbackDuringFling) { 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We want to suppress selection changes 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remove any future code to set mSuppressSelectionChanged = false 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeCallbacks(mDisableSuppressSelectionChangedRunnable); 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will get reset once we scroll into slots 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mSuppressSelectionChanged) mSuppressSelectionChanged = true; 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fling the gallery! 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.startUsingVelocity((int) -velocityX); 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9943d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.v(TAG, String.valueOf(e2.getX() - e1.getX())); 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Now's a good time to tell our parent to stop intercepting our events! 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The user has moved more than the slop amount, since GestureDetector 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * ensures this before calling this method. Also, if a parent is more 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * interested in this touch's events than we are, it would have 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * intercepted them by now (for example, we can assume when a Gallery is 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * in the ListView, a vertical scroll would not end up in this method 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * since a ListView would have intercepted it by now). 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mParent.requestDisallowInterceptTouchEvent(true); 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // As the user scrolls, we want to callback selection changes so related- 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // info on the screen is up-to-date with the gallery's selection 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mShouldCallbackDuringFling) { 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mIsFirstScroll) { 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We're not notifying the client of selection changes during 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the fling, and this scroll could possibly be a fling. Don't 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * do selection changes until we're sure it is not a fling. 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mSuppressSelectionChanged) mSuppressSelectionChanged = true; 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postDelayed(mDisableSuppressSelectionChangedRunnable, SCROLL_TO_FLING_UNCERTAINTY_TIMEOUT); 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSuppressSelectionChanged) mSuppressSelectionChanged = false; 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Track the motion 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trackMotionScroll(-1 * (int) distanceX); 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsFirstScroll = false; 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10333d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onDown(MotionEvent e) { 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Kill any existing fling/scroll 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.stop(false); 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the item's view that was touched 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchPosition = pointToPosition((int) e.getX(), (int) e.getY()); 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDownTouchPosition >= 0) { 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchView = getChildAt(mDownTouchPosition - mFirstPosition); 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchView.setPressed(true); 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Reset the multiple-scroll tracking state 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsFirstScroll = true; 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Must return true to get matching events for this down event. 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Called when a touch event's action is MotionEvent.ACTION_UP. 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void onUp() { 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFlingRunnable.mScroller.isFinished()) { 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollIntoSlots(); 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchUnpress(); 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Called when a touch event's action is MotionEvent.ACTION_CANCEL. 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void onCancel() { 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onUp(); 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10733d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onLongPress(MotionEvent e) { 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDownTouchPosition < 0) { 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long id = getItemIdAtPosition(mDownTouchPosition); 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchLongPress(mDownTouchView, mDownTouchPosition, id); 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Unused methods from GestureDetector.OnGestureListener below 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10873d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onShowPress(MotionEvent e) { 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Unused methods from GestureDetector.OnGestureListener above 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void dispatchPress(View child) { 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setPressed(true); 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setPressed(true); 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void dispatchUnpress() { 11039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = getChildCount() - 1; i >= 0; i--) { 11059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChildAt(i).setPressed(false); 11069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setPressed(false); 11099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void dispatchSetSelected(boolean selected) { 11139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 11149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We don't want to pass the selected state given from its parent to its 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children since this widget itself has a selected state to give to its 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children. 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void dispatchSetPressed(boolean pressed) { 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Show the pressed state on the selected child 11249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedChild != null) { 11259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedChild.setPressed(pressed); 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected ContextMenuInfo getContextMenuInfo() { 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mContextMenuInfo; 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean showContextMenuForChild(View originalView) { 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int longPressPosition = getPositionForView(originalView); 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (longPressPosition < 0) { 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final long longPressId = mAdapter.getItemId(longPressPosition); 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return dispatchLongPress(originalView, longPressPosition, longPressId); 11449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean showContextMenu() { 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isPressed() && mSelectedPosition >= 0) { 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int index = mSelectedPosition - mFirstPosition; 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v = getChildAt(index); 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return dispatchLongPress(v, mSelectedPosition, mSelectedRowId); 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean dispatchLongPress(View view, int position, long id) { 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnItemLongClickListener != null) { 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = mOnItemLongClickListener.onItemLongClick(this, mDownTouchView, 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchPosition, id); 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!handled) { 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContextMenuInfo = new AdapterContextMenuInfo(view, position, id); 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = super.showContextMenuForChild(this); 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (handled) { 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Gallery steals all key events 1181746a95ab7145a1c7583d1f2d6004a508cd7a31dcChristian Mehlmauer return event.dispatch(this, null, null); 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handles left, right, and clicking 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#onKeyDown 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyDown(int keyCode, KeyEvent event) { 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (movePrevious()) { 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project playSoundEffect(SoundEffectConstants.NAVIGATION_LEFT); 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (moveNext()) { 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project playSoundEffect(SoundEffectConstants.NAVIGATION_RIGHT); 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 12039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 12059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: 12069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mReceivedInvokeKeyDown = true; 12079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // fallthrough to default handling 12089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyDown(keyCode, event); 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyUp(int keyCode, KeyEvent event) { 12159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: { 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mReceivedInvokeKeyDown) { 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0) { 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchPress(mSelectedChild); 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postDelayed(new Runnable() { 12243d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchUnpress(); 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }, ViewConfiguration.getPressedStateDuration()); 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedIndex = mSelectedPosition - mFirstPosition; 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performItemClick(getChildAt(selectedIndex), mSelectedPosition, mAdapter 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project .getItemId(mSelectedPosition)); 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear the flag 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mReceivedInvokeKeyDown = false; 12389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 12409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyUp(keyCode, event); 12449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean movePrevious() { 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && mSelectedPosition > 0) { 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollToChild(mSelectedPosition - mFirstPosition - 1); 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean moveNext() { 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && mSelectedPosition < mItemCount - 1) { 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollToChild(mSelectedPosition - mFirstPosition + 1); 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollToChild(int childPosition) { 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(childPosition); 12669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = getCenterOfGallery() - getCenterOfView(child); 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.startUsingDistance(distance); 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void setSelectedPositionInt(int position) { 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.setSelectedPositionInt(position); 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Updates any metadata we keep about the selected item. 12819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project updateSelectedItemMetadata(); 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void updateSelectedItemMetadata() { 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldSelectedChild = mSelectedChild; 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = mSelectedChild = getChildAt(mSelectedPosition - mFirstPosition); 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == null) { 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setSelected(true); 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setFocusable(true); 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (hasFocus()) { 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.requestFocus(); 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We unfocus the old child down here so the above hasFocus check 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // returns true 13026691fcfbc806ecfd884ab2e5ff75994d7ee3ddd5Romain Guy if (oldSelectedChild != null && oldSelectedChild != child) { 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure its drawable state doesn't contain 'selected' 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSelectedChild.setSelected(false); 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure it is not focusable anymore, since otherwise arrow keys 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // can make this one be focused 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSelectedChild.setFocusable(false); 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Describes how the child views are aligned. 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param gravity 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_gravity 13199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setGravity(int gravity) 13219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 13229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mGravity != gravity) { 13239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGravity = gravity; 13249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int getChildDrawingOrder(int childCount, int i) { 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedIndex = mSelectedPosition - mFirstPosition; 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Just to be safe 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedIndex < 0) return i; 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i == childCount - 1) { 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the selected child last 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedIndex; 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (i >= selectedIndex) { 13393d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Move the children after the selected child earlier one 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return i + 1; 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13423d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Keep the children before the selected child the same 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return i; 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The gallery shows focus by focusing the selected item. So, give 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus to our selected item instead. We steal keys from our 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selected item elsewhere. 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (gainFocus && mSelectedChild != null) { 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedChild.requestFocus(direction); 13586691fcfbc806ecfd884ab2e5ff75994d7ee3ddd5Romain Guy mSelectedChild.setSelected(true); 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13638a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov @Override 13648a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 13658a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov super.onInitializeAccessibilityEvent(event); 13668a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov event.setClassName(Gallery.class.getName()); 13678a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov } 13688a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov 13698a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov @Override 13708a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 13718a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov super.onInitializeAccessibilityNodeInfo(info); 13728a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov info.setClassName(Gallery.class.getName()); 137348d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov info.setScrollable(mItemCount > 1); 1374fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled()) { 1375fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (mItemCount > 0 && mSelectedPosition < mItemCount - 1) { 1376fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD); 1377fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 1378fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled() && mItemCount > 0 && mSelectedPosition > 0) { 1379fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD); 1380fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov } 138148d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 138248d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 138348d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov 138448d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov @Override 138548d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov public boolean performAccessibilityAction(int action, Bundle arguments) { 138648d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov if (super.performAccessibilityAction(action, arguments)) { 138748d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return true; 138848d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 138948d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov switch (action) { 139048d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: { 1391fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled() && mItemCount > 0 && mSelectedPosition < mItemCount - 1) { 139248d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov final int currentChildIndex = mSelectedPosition - mFirstPosition; 139348d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return scrollToChild(currentChildIndex + 1); 139448d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 139548d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } return false; 139648d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: { 1397fb1e80a247221ee7e8f5c5deba04812021d9d07eSvetoslav Ganov if (isEnabled() && mItemCount > 0 && mSelectedPosition > 0) { 139848d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov final int currentChildIndex = mSelectedPosition - mFirstPosition; 139948d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return scrollToChild(currentChildIndex - 1); 140048d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 140148d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } return false; 140248d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov } 140348d1586f4065fc9ab97a679da1e4f7c327c943f2Svetoslav Ganov return false; 14048a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov } 14058a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov 14069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Responsible for fling behavior. Use {@link #startUsingVelocity(int)} to 14089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * initiate a fling. Each frame of the fling is handled in {@link #run()}. 14099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A FlingRunnable will keep re-posting itself until the fling is done. 14109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private class FlingRunnable implements Runnable { 14129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Tracks the decay of a fling scroll 14149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Scroller mScroller; 14169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 14189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * X value reported by mScroller on the previous fling 14199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mLastFlingX; 14219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public FlingRunnable() { 14239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller = new Scroller(getContext()); 14249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void startCommon() { 14279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remove any pending flings 14289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeCallbacks(this); 14299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void startUsingVelocity(int initialVelocity) { 14329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (initialVelocity == 0) return; 14339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startCommon(); 14359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int initialX = initialVelocity < 0 ? Integer.MAX_VALUE : 0; 14379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastFlingX = initialX; 14389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.fling(initialX, 0, initialVelocity, 0, 14399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 0, Integer.MAX_VALUE, 0, Integer.MAX_VALUE); 14409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project post(this); 14419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void startUsingDistance(int distance) { 14449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (distance == 0) return; 14459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startCommon(); 14479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastFlingX = 0; 14499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.startScroll(0, 0, -distance, 0, mAnimationDuration); 14509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project post(this); 14519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void stop(boolean scrollIntoSlots) { 14549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeCallbacks(this); 14559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endFling(scrollIntoSlots); 14569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void endFling(boolean scrollIntoSlots) { 14599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 14609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Force the scroller's status to finished (without setting its 14619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position to the end) 14629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 14639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.forceFinished(true); 14649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollIntoSlots) scrollIntoSlots(); 14669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14683d0124f1764e57b18161b833b52964f3141243d1Doug Felt @Override 14699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 14709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 14729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endFling(true); 14739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 14749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 14759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldStopFling = false; 14779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Scroller scroller = mScroller; 14799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean more = scroller.computeScrollOffset(); 14809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int x = scroller.getCurrX(); 14819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Flip sign to convert finger direction to list items direction 14839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (e.g. finger moving down means list is moving towards the top) 14849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = mLastFlingX - x; 14859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pretend that each frame of a fling scroll is a touch scroll 14879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 14883d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Moving towards the left. Use leftmost view as mDownTouchPosition 14893d0124f1764e57b18161b833b52964f3141243d1Doug Felt mDownTouchPosition = mIsRtl ? (mFirstPosition + getChildCount() - 1) : 14903d0124f1764e57b18161b833b52964f3141243d1Doug Felt mFirstPosition; 14919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 14929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't fling more than 1 screen 14939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = Math.min(getWidth() - mPaddingLeft - mPaddingRight - 1, delta); 14949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 14953d0124f1764e57b18161b833b52964f3141243d1Doug Felt // Moving towards the right. Use rightmost view as mDownTouchPosition 14969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offsetToLast = getChildCount() - 1; 14973d0124f1764e57b18161b833b52964f3141243d1Doug Felt mDownTouchPosition = mIsRtl ? mFirstPosition : 14983d0124f1764e57b18161b833b52964f3141243d1Doug Felt (mFirstPosition + getChildCount() - 1); 14999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't fling more than 1 screen 15019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = Math.max(-(getWidth() - mPaddingRight - mPaddingLeft - 1), delta); 15029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trackMotionScroll(delta); 15059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (more && !mShouldStopFling) { 15079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastFlingX = x; 15089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project post(this); 15099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 15109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endFling(true); 15119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 15179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gallery extends LayoutParams to provide a place to hold current 15189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Transformation information along with previous position/transformation 15199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * info. 15209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 15219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static class LayoutParams extends ViewGroup.LayoutParams { 15229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public LayoutParams(Context c, AttributeSet attrs) { 15239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(c, attrs); 15249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public LayoutParams(int w, int h) { 15279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(w, h); 15289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 15309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public LayoutParams(ViewGroup.LayoutParams source) { 15319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(source); 15329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 15349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1535