Gallery.java revision 6691fcfbc806ecfd884ab2e5ff75994d7ee3ddd5
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 com.android.internal.R; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.annotation.Widget; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Rect; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.Log; 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; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewConfiguration; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ViewGroup; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.SoundEffectConstants; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.ContextMenu.ContextMenuInfo; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.animation.Transformation; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A view that shows items in a center-locked, horizontally scrolling list. 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The default values for the Gallery assume you will be using 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.R.styleable#Theme_galleryItemBackground} as the background for 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * each View given to the Gallery from the Adapter. If you are not doing this, 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may need to adjust some Gallery properties, such as the spacing. 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Views given to the Gallery should use {@link Gallery.LayoutParams} as their 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout parameters type. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_animationDuration 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_spacing 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_gravity 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project@Widget 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class Gallery extends AbsSpinner implements GestureDetector.OnGestureListener { 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String TAG = "Gallery"; 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 598c11e31143726c9457280c6c0ec83472763c0de9Romain Guy private static final boolean localLOGV = false; 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Duration in milliseconds from the start of a scroll during which we're 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * unsure whether the user is scrolling or flinging. 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int SCROLL_TO_FLING_UNCERTAINTY_TIMEOUT = 250; 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Horizontal spacing between items. 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mSpacing = 0; 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * How long the transition animation should run when a child view changes 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position, measured in milliseconds. 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mAnimationDuration = 400; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The alpha of items that are not selected. 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mUnselectedAlpha; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Left most edge of a child seen so far during layout. 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mLeftMost; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Right most edge of a child seen so far during layout. 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mRightMost; 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mGravity; 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helper for detecting touch gestures. 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private GestureDetector mGestureDetector; 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The position of the item that received the user's down touch. 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mDownTouchPosition; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The view of the item that received the user's down touch. 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mDownTouchView; 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Executes the delta scrolls from a fling or scroll movement. 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private FlingRunnable mFlingRunnable = new FlingRunnable(); 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets mSuppressSelectionChanged = false. This is used to set it to false 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * in the future. It will also trigger a selection changed. 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Runnable mDisableSuppressSelectionChangedRunnable = new Runnable() { 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSuppressSelectionChanged = false; 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selectionChanged(); 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * When fling runnable runs, it resets this to false. Any method along the 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * path until the end of its run() can set this to true to abort any 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * remaining fling. For example, if we've reached either the leftmost or 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * rightmost item, we will set this to true. 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mShouldStopFling; 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The currently selected item's child. 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View mSelectedChild; 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether to continuously callback on the item selected listener during a 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * fling. 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mShouldCallbackDuringFling = true; 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether to callback when an item that is not selected is clicked. 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mShouldCallbackOnUnselectedItemClick = true; 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If true, do not callback to item selected listener. 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mSuppressSelectionChanged; 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If true, we have received the "invoke" (center or enter buttons) key 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * down. This is checked before we action on the "invoke" key up, and is 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * subsequently cleared. 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mReceivedInvokeKeyDown; 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private AdapterContextMenuInfo mContextMenuInfo; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If true, this onScroll is the first for this user's drag (remember, a 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * drag sends many onScrolls). 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean mIsFirstScroll; 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Gallery(Context context) { 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Gallery(Context context, AttributeSet attrs) { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, R.attr.galleryStyle); 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Gallery(Context context, AttributeSet attrs, int defStyle) { 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGestureDetector = new GestureDetector(context, this); 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGestureDetector.setIsLongpressEnabled(true); 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = context.obtainStyledAttributes( 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project attrs, com.android.internal.R.styleable.Gallery, defStyle, 0); 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int index = a.getInt(com.android.internal.R.styleable.Gallery_gravity, -1); 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index >= 0) { 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setGravity(index); 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int animationDuration = 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.getInt(com.android.internal.R.styleable.Gallery_animationDuration, -1); 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (animationDuration > 0) { 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setAnimationDuration(animationDuration); 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spacing = 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.getDimensionPixelOffset(com.android.internal.R.styleable.Gallery_spacing, 0); 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSpacing(spacing); 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float unselectedAlpha = a.getFloat( 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.Gallery_unselectedAlpha, 0.5f); 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setUnselectedAlpha(unselectedAlpha); 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We draw the selected item last (because otherwise the item to the 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // right overlaps it) 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGroupFlags |= FLAG_USE_CHILD_DRAWING_ORDER; 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGroupFlags |= FLAG_SUPPORT_STATIC_TRANSFORMATIONS; 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether or not to callback on any {@link #getOnItemSelectedListener()} 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * while the items are being flinged. If false, only the final selected item 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will cause the callback. If true, all items between the first and the 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * final will cause callbacks. 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param shouldCallback Whether or not to callback on the listener while 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the items are being flinged. 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setCallbackDuringFling(boolean shouldCallback) { 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldCallbackDuringFling = shouldCallback; 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Whether or not to callback when an item that is not selected is clicked. 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If false, the item will become selected (and re-centered). If true, the 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #getOnItemClickListener()} will get the callback. 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param shouldCallback Whether or not to callback on the listener when a 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * item that is not selected is clicked. 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setCallbackOnUnselectedItemClick(boolean shouldCallback) { 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldCallbackOnUnselectedItemClick = shouldCallback; 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets how long the transition animation should run when a child view 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * changes position. Only relevant if animation is turned on. 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param animationDurationMillis The duration of the transition, in 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * milliseconds. 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_animationDuration 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setAnimationDuration(int animationDurationMillis) { 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mAnimationDuration = animationDurationMillis; 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the spacing between items in a Gallery 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param spacing The spacing in pixels between items in the Gallery 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_spacing 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setSpacing(int spacing) { 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpacing = spacing; 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the alpha of items that are not selected in the Gallery. 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param unselectedAlpha the alpha for the items that are not selected. 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_unselectedAlpha 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setUnselectedAlpha(float unselectedAlpha) { 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mUnselectedAlpha = unselectedAlpha; 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean getChildStaticTransformation(View child, Transformation t) { 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project t.clear(); 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project t.setAlpha(child == mSelectedChild ? 1.0f : mUnselectedAlpha); 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollExtent() { 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Only 1 item is considered to be selected 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1; 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollOffset() { 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Current scroll position is the same as the selected position 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSelectedPosition; 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int computeHorizontalScrollRange() { 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Scroll range is the same as the item count 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mItemCount; 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return p instanceof LayoutParams; 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new LayoutParams(p); 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) { 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new LayoutParams(getContext(), attrs); 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected ViewGroup.LayoutParams generateDefaultLayoutParams() { 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gallery expects Gallery.LayoutParams. 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new Gallery.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ViewGroup.LayoutParams.WRAP_CONTENT); 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onLayout(boolean changed, int l, int t, int r, int b) { 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onLayout(changed, l, t, r, b); 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Remember that we are in layout to prevent more layout request from 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being generated. 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = true; 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project layout(0, false); 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mInLayout = false; 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int getChildHeight(View child) { 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child.getMeasuredHeight(); 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Tracks a motion scroll. In reality, this is used to do just about any 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * movement to items (touch scroll, arrow-key scroll, set an item as selected). 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param deltaX Change in X from the previous event. 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void trackMotionScroll(int deltaX) { 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0) { 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean toLeft = deltaX < 0; 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int limitedDeltaX = getLimitedMotionScrollAmount(toLeft, deltaX); 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (limitedDeltaX != deltaX) { 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The above call returned a limited amount, so stop any scrolls/flings 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.endFling(false); 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onFinishedMovement(); 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offsetChildrenLeftAndRight(limitedDeltaX); 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachOffScreenChildren(toLeft); 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (toLeft) { 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If moved left, there will be empty space on the right 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryRight(); 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Similarly, empty space on the left 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryLeft(); 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear unused views 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.clear(); 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectionToCenterChild(); 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int getLimitedMotionScrollAmount(boolean motionToLeft, int deltaX) { 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int extremeItemPosition = motionToLeft ? mItemCount - 1 : 0; 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View extremeChild = getChildAt(extremeItemPosition - mFirstPosition); 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (extremeChild == null) { 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return deltaX; 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int extremeChildCenter = getCenterOfView(extremeChild); 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryCenter = getCenterOfGallery(); 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (motionToLeft) { 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (extremeChildCenter <= galleryCenter) { 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The extreme child is past his boundary point! 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (extremeChildCenter >= galleryCenter) { 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The extreme child is past his boundary point! 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int centerDifference = galleryCenter - extremeChildCenter; 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return motionToLeft 4149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ? Math.max(centerDifference, deltaX) 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project : Math.min(centerDifference, deltaX); 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Offset the horizontal location of all children of this view by the 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified number of pixels. 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset the number of pixels to offset 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void offsetChildrenLeftAndRight(int offset) { 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = getChildCount() - 1; i >= 0; i--) { 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChildAt(i).offsetLeftAndRight(offset); 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The center of this Gallery. 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int getCenterOfGallery() { 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (getWidth() - mPaddingLeft - mPaddingRight) / 2 + mPaddingLeft; 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The center of the given view. 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static int getCenterOfView(View view) { 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return view.getLeft() + view.getWidth() / 2; 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Detaches children that are off the screen (i.e.: Gallery bounds). 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toLeft Whether to detach children to the left of the Gallery, or 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to the right. 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void detachOffScreenChildren(boolean toLeft) { 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numChildren = getChildCount(); 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int firstPosition = mFirstPosition; 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int start = 0; 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = 0; 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (toLeft) { 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int galleryLeft = mPaddingLeft; 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < numChildren; i++) { 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View child = getChildAt(i); 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getRight() >= galleryLeft) { 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count++; 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.put(firstPosition + i, child); 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int galleryRight = getWidth() - mPaddingRight; 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = numChildren - 1; i >= 0; i--) { 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final View child = getChildAt(i); 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getLeft() <= galleryRight) { 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project start = i; 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count++; 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.put(firstPosition + i, child); 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachViewsFromParent(start, count); 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (toLeft) { 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition += count; 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Scrolls the items so that the selected item is in its 'slot' (its center 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is the gallery's center). 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void scrollIntoSlots() { 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (getChildCount() == 0 || mSelectedChild == null) return; 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedCenter = getCenterOfView(mSelectedChild); 4979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int targetCenter = getCenterOfGallery(); 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int scrollAmount = targetCenter - selectedCenter; 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollAmount != 0) { 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.startUsingDistance(scrollAmount); 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onFinishedMovement(); 5049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void onFinishedMovement() { 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSuppressSelectionChanged) { 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSuppressSelectionChanged = false; 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We haven't been callbacking during the fling, so do it now 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.selectionChanged(); 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5148c11e31143726c9457280c6c0ec83472763c0de9Romain Guy invalidate(); 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void selectionChanged() { 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mSuppressSelectionChanged) { 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.selectionChanged(); 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Looks for the child that is closest to the center and sets it as the 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selected child. 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void setSelectionToCenterChild() { 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View selView = mSelectedChild; 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedChild == null) return; 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryCenter = getCenterOfGallery(); 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5358c11e31143726c9457280c6c0ec83472763c0de9Romain Guy // Common case where the current selected position is correct 5368c11e31143726c9457280c6c0ec83472763c0de9Romain Guy if (selView.getLeft() <= galleryCenter && selView.getRight() >= galleryCenter) { 5378c11e31143726c9457280c6c0ec83472763c0de9Romain Guy return; 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // TODO better search 5419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int closestEdgeDistance = Integer.MAX_VALUE; 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newSelectedChildIndex = 0; 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = getChildCount() - 1; i >= 0; i--) { 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(i); 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child.getLeft() <= galleryCenter && child.getRight() >= galleryCenter) { 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This child is in the center 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSelectedChildIndex = i; 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childClosestEdgeDistance = Math.min(Math.abs(child.getLeft() - galleryCenter), 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Math.abs(child.getRight() - galleryCenter)); 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (childClosestEdgeDistance < closestEdgeDistance) { 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closestEdgeDistance = childClosestEdgeDistance; 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project newSelectedChildIndex = i; 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int newPos = mFirstPosition + newSelectedChildIndex; 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (newPos != mSelectedPosition) { 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(newPos); 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(newPos); 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates and positions all views for this Gallery. 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We layout rarely, most of the time {@link #trackMotionScroll(int)} takes 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * care of repositioning, adding, and removing children. 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param delta Change in the selected position. +1 means the selection is 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * moving to the right, so views are scrolling to the left. -1 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * means the selection is moving to the left. 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void layout(int delta, boolean animate) { 5829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenLeft = mSpinnerPadding.left; 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childrenWidth = mRight - mLeft - mSpinnerPadding.left - mSpinnerPadding.right; 5859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDataChanged) { 5879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleDataChanged(); 5889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Handle an empty gallery by removing all views. 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project resetList(); 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Update to the new selected position. 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mNextSelectedPosition >= 0) { 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setSelectedPositionInt(mNextSelectedPosition); 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // All views go in recycler while we are in layout 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recycleAllViews(); 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear out old views 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project //removeAllViewsInLayout(); 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project detachAllViewsFromParent(); 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 6099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * These will be used to give initial positions to views entering the 6109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * gallery as we scroll 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRightMost = 0; 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLeftMost = 0; 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make selected view and center it 6169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 6189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mFirstPosition will be decreased as we add views to the left later 6199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * on. The 0 for x will be offset in a couple lines down. 6209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = mSelectedPosition; 6229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View sel = makeAndAddView(mSelectedPosition, 0, 0, true); 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Put the selected child in the center 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedOffset = childrenLeft + (childrenWidth / 2) - (sel.getWidth() / 2); 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sel.offsetLeftAndRight(selectedOffset); 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryRight(); 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fillToGalleryLeft(); 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Flush any cached views that did not get reused above 6329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRecycler.clear(); 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project invalidate(); 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project checkSelectionChanged(); 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDataChanged = false; 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNeedSync = false; 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setNextSelectedPositionInt(mSelectedPosition); 6409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project updateSelectedItemMetadata(); 6429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void fillToGalleryLeft() { 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int itemSpacing = mSpacing; 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryLeft = mPaddingLeft; 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for initial iteration 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View prevIterationView = getChildAt(0); 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curPosition; 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curRightEdge; 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (prevIterationView != null) { 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition = mFirstPosition - 1; 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge = prevIterationView.getLeft() - itemSpacing; 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // No children available! 6589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition = 0; 6599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge = mRight - mLeft - mPaddingRight; 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldStopFling = true; 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (curRightEdge > galleryLeft && curPosition >= 0) { 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevIterationView = makeAndAddView(curPosition, curPosition - mSelectedPosition, 6659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge, false); 6669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember some state 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = curPosition; 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for next iteration 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curRightEdge = prevIterationView.getLeft() - itemSpacing; 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition--; 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void fillToGalleryRight() { 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int itemSpacing = mSpacing; 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int galleryRight = mRight - mLeft - mPaddingRight; 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numChildren = getChildCount(); 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int numItems = mItemCount; 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for initial iteration 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View prevIterationView = getChildAt(numChildren - 1); 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curPosition; 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int curLeftEdge; 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (prevIterationView != null) { 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition = mFirstPosition + numChildren; 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge = prevIterationView.getRight() + itemSpacing; 6909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFirstPosition = curPosition = mItemCount - 1; 6929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge = mPaddingLeft; 6939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldStopFling = true; 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (curLeftEdge < galleryRight && curPosition < numItems) { 6979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevIterationView = makeAndAddView(curPosition, curPosition - mSelectedPosition, 6989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge, true); 6999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Set state for next iteration 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curLeftEdge = prevIterationView.getRight() + itemSpacing; 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project curPosition++; 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Obtain a view, either by pulling an existing view from the recycler or by 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * getting a new one from the adapter. If we are animating, make sure there 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is enough information in the view's layout parameters to animate from the 7109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * old to new positions. 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param position Position in the gallery for the view to obtain 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset Offset from the selected position 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x X-coordintate indicating where this view should be placed. This 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will either be the left or right edge of the view, depending on 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the fromLeft paramter 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromLeft Are we posiitoning views based on the left edge? (i.e., 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * building from left to right)? 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return A view that has been added to the gallery 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private View makeAndAddView(int position, int offset, int x, 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean fromLeft) { 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child; 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mDataChanged) { 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = mRecycler.get(position); 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Can reuse an existing view 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childLeft = child.getLeft(); 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remember left and right edges of where views have been placed 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRightMost = Math.max(mRightMost, childLeft 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + child.getMeasuredWidth()); 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLeftMost = Math.min(mLeftMost, childLeft); 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Position the view 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setUpChild(child, offset, x, fromLeft); 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Nothing found in the recycler -- ask the adapter for a view 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child = mAdapter.getView(position, null, this); 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Position the view 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setUpChild(child, offset, x, fromLeft); 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return child; 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helper for makeAndAddView to set the position of a view and fill out its 7559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * layout paramters. 7569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child The view to position 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param offset Offset from the selected position 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param x X-coordintate indicating where this view should be placed. This 7609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * will either be the left or right edge of the view, depending on 7619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the fromLeft paramter 7629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromLeft Are we posiitoning views based on the left edge? (i.e., 7639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * building from left to right)? 7649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void setUpChild(View child, int offset, int x, boolean fromLeft) { 7669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Respect layout params that are already in the view. Otherwise 7689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // make some up... 7699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Gallery.LayoutParams lp = (Gallery.LayoutParams) 7709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.getLayoutParams(); 7719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lp == null) { 7729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lp = (Gallery.LayoutParams) generateDefaultLayoutParams(); 7739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project addViewInLayout(child, fromLeft ? -1 : 0, lp); 7769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setSelected(offset == 0); 7789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get measure specs 7809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeightSpec = ViewGroup.getChildMeasureSpec(mHeightMeasureSpec, 7819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpinnerPadding.top + mSpinnerPadding.bottom, lp.height); 7829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec, 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpinnerPadding.left + mSpinnerPadding.right, lp.width); 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Measure child 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.measure(childWidthSpec, childHeightSpec); 7879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childLeft; 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childRight; 7909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Position vertically based on gravity setting 7928c11e31143726c9457280c6c0ec83472763c0de9Romain Guy int childTop = calculateTop(child, true); 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childBottom = childTop + child.getMeasuredHeight(); 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int width = child.getMeasuredWidth(); 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fromLeft) { 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childLeft = x; 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childRight = childLeft + width; 7999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 8009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childLeft = x - width; 8019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childRight = x; 8029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.layout(childLeft, childTop, childRight, childBottom); 8059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Figure out vertical placement based on mGravity 8099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 8109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param child Child to place 8119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Where the top of the child should be 8129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8138c11e31143726c9457280c6c0ec83472763c0de9Romain Guy private int calculateTop(View child, boolean duringLayout) { 8149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int myHeight = duringLayout ? mMeasuredHeight : getHeight(); 8159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childHeight = duringLayout ? child.getMeasuredHeight() : child.getHeight(); 8169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int childTop = 0; 8189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mGravity) { 8209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case Gravity.TOP: 8219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childTop = mSpinnerPadding.top; 8229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 8239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case Gravity.CENTER_VERTICAL: 8249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int availableSpace = myHeight - mSpinnerPadding.bottom 8259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project - mSpinnerPadding.top - childHeight; 8269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childTop = mSpinnerPadding.top + (availableSpace / 2); 8279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 8289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case Gravity.BOTTOM: 8299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childTop = myHeight - mSpinnerPadding.bottom - childHeight; 8309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 8319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return childTop; 8339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 8369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onTouchEvent(MotionEvent event) { 8379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Give everything to the gesture detector 8399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean retValue = mGestureDetector.onTouchEvent(event); 8409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int action = event.getAction(); 8429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (action == MotionEvent.ACTION_UP) { 8439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Helper method for lifted finger 8449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onUp(); 8459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (action == MotionEvent.ACTION_CANCEL) { 8469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onCancel(); 8479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return retValue; 8509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 8549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onSingleTapUp(MotionEvent e) { 8569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDownTouchPosition >= 0) { 8589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // An item tap should make it selected, so scroll to this child. 8609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollToChild(mDownTouchPosition - mFirstPosition); 8619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Also pass the click so the client knows, if it wants to. 8639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mShouldCallbackOnUnselectedItemClick || mDownTouchPosition == mSelectedPosition) { 8649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performItemClick(mDownTouchView, mDownTouchPosition, mAdapter 8659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project .getItemId(mDownTouchPosition)); 8669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 8699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 8729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 8769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { 8789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mShouldCallbackDuringFling) { 8809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We want to suppress selection changes 8819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remove any future code to set mSuppressSelectionChanged = false 8839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeCallbacks(mDisableSuppressSelectionChangedRunnable); 8849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This will get reset once we scroll into slots 8869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mSuppressSelectionChanged) mSuppressSelectionChanged = true; 8879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Fling the gallery! 8909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.startUsingVelocity((int) -velocityX); 8919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 8939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 8949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 8969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 8979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 8989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { 8999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (localLOGV) Log.v(TAG, String.valueOf(e2.getX() - e1.getX())); 9019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Now's a good time to tell our parent to stop intercepting our events! 9049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The user has moved more than the slop amount, since GestureDetector 9059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * ensures this before calling this method. Also, if a parent is more 9069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * interested in this touch's events than we are, it would have 9079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * intercepted them by now (for example, we can assume when a Gallery is 9089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * in the ListView, a vertical scroll would not end up in this method 9099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * since a ListView would have intercepted it by now). 9109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mParent.requestDisallowInterceptTouchEvent(true); 9129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // As the user scrolls, we want to callback selection changes so related- 9149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // info on the screen is up-to-date with the gallery's selection 9159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mShouldCallbackDuringFling) { 9169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mIsFirstScroll) { 9179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 9189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We're not notifying the client of selection changes during 9199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the fling, and this scroll could possibly be a fling. Don't 9209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * do selection changes until we're sure it is not a fling. 9219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!mSuppressSelectionChanged) mSuppressSelectionChanged = true; 9239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postDelayed(mDisableSuppressSelectionChangedRunnable, SCROLL_TO_FLING_UNCERTAINTY_TIMEOUT); 9249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 9269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSuppressSelectionChanged) mSuppressSelectionChanged = false; 9279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Track the motion 9309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trackMotionScroll(-1 * (int) distanceX); 9319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsFirstScroll = false; 9339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 9349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 9389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onDown(MotionEvent e) { 9409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Kill any existing fling/scroll 9429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.stop(false); 9439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Get the item's view that was touched 9459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchPosition = pointToPosition((int) e.getX(), (int) e.getY()); 9469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDownTouchPosition >= 0) { 9489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchView = getChildAt(mDownTouchPosition - mFirstPosition); 9499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchView.setPressed(true); 9509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Reset the multiple-scroll tracking state 9539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mIsFirstScroll = true; 9549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Must return true to get matching events for this down event. 9569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 9579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Called when a touch event's action is MotionEvent.ACTION_UP. 9619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void onUp() { 9639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFlingRunnable.mScroller.isFinished()) { 9659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollIntoSlots(); 9669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchUnpress(); 9699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Called when a touch event's action is MotionEvent.ACTION_CANCEL. 9739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void onCancel() { 9759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project onUp(); 9769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 9809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onLongPress(MotionEvent e) { 9829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDownTouchPosition < 0) { 9849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 9859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 9889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long id = getItemIdAtPosition(mDownTouchPosition); 9899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchLongPress(mDownTouchView, mDownTouchPosition, id); 9909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Unused methods from GestureDetector.OnGestureListener below 9939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 9949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 9959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 9969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 9979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onShowPress(MotionEvent e) { 9989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 9999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Unused methods from GestureDetector.OnGestureListener above 10019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void dispatchPress(View child) { 10039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 10059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setPressed(true); 10069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setPressed(true); 10099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void dispatchUnpress() { 10129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = getChildCount() - 1; i >= 0; i--) { 10149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChildAt(i).setPressed(false); 10159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setPressed(false); 10189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void dispatchSetSelected(boolean selected) { 10229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 10239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * We don't want to pass the selected state given from its parent to its 10249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children since this widget itself has a selected state to give to its 10259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * children. 10269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void dispatchSetPressed(boolean pressed) { 10319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Show the pressed state on the selected child 10339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSelectedChild != null) { 10349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedChild.setPressed(pressed); 10359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected ContextMenuInfo getContextMenuInfo() { 10409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mContextMenuInfo; 10419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean showContextMenuForChild(View originalView) { 10459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int longPressPosition = getPositionForView(originalView); 10479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (longPressPosition < 0) { 10489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 10499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final long longPressId = mAdapter.getItemId(longPressPosition); 10529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return dispatchLongPress(originalView, longPressPosition, longPressId); 10539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean showContextMenu() { 10579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isPressed() && mSelectedPosition >= 0) { 10599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int index = mSelectedPosition - mFirstPosition; 10609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View v = getChildAt(index); 10619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return dispatchLongPress(v, mSelectedPosition, mSelectedRowId); 10629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 10659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean dispatchLongPress(View view, int position, long id) { 10689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean handled = false; 10699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mOnItemLongClickListener != null) { 10719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = mOnItemLongClickListener.onItemLongClick(this, mDownTouchView, 10729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchPosition, id); 10739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!handled) { 10769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mContextMenuInfo = new AdapterContextMenuInfo(view, position, id); 10779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handled = super.showContextMenuForChild(this); 10789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (handled) { 10819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 10829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return handled; 10859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean dispatchKeyEvent(KeyEvent event) { 10899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Gallery steals all key events 10909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return event.dispatch(this); 10919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 10929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 10949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Handles left, right, and clicking 10959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @see android.view.View#onKeyDown 10969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 10979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 10989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyDown(int keyCode, KeyEvent event) { 10999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 11009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_LEFT: 11029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (movePrevious()) { 11039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project playSoundEffect(SoundEffectConstants.NAVIGATION_LEFT); 11049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_RIGHT: 11089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (moveNext()) { 11099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project playSoundEffect(SoundEffectConstants.NAVIGATION_RIGHT); 11109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 11149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: 11159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mReceivedInvokeKeyDown = true; 11169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // fallthrough to default handling 11179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyDown(keyCode, event); 11209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyUp(int keyCode, KeyEvent event) { 11249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (keyCode) { 11259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_DPAD_CENTER: 11269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case KeyEvent.KEYCODE_ENTER: { 11279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mReceivedInvokeKeyDown) { 11299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0) { 11309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchPress(mSelectedChild); 11329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project postDelayed(new Runnable() { 11339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 11349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dispatchUnpress(); 11359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }, ViewConfiguration.getPressedStateDuration()); 11379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedIndex = mSelectedPosition - mFirstPosition; 11399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project performItemClick(getChildAt(selectedIndex), mSelectedPosition, mAdapter 11409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project .getItemId(mSelectedPosition)); 11419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Clear the flag 11459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mReceivedInvokeKeyDown = false; 11469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyUp(keyCode, event); 11529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean movePrevious() { 11559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && mSelectedPosition > 0) { 11569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollToChild(mSelectedPosition - mFirstPosition - 1); 11579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 11609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean moveNext() { 11649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount > 0 && mSelectedPosition < mItemCount - 1) { 11659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project scrollToChild(mSelectedPosition - mFirstPosition + 1); 11669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 11689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 11699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean scrollToChild(int childPosition) { 11739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = getChildAt(childPosition); 11749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child != null) { 11769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int distance = getCenterOfGallery() - getCenterOfView(child); 11779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFlingRunnable.startUsingDistance(distance); 11789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 11799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 11829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 11859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project void setSelectedPositionInt(int position) { 11869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.setSelectedPositionInt(position); 11879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Updates any metadata we keep about the selected item. 11899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project updateSelectedItemMetadata(); 11909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 11919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void updateSelectedItemMetadata() { 11939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View oldSelectedChild = mSelectedChild; 11959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 11969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project View child = mSelectedChild = getChildAt(mSelectedPosition - mFirstPosition); 11979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (child == null) { 11989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 11999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setSelected(true); 12029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.setFocusable(true); 12039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (hasFocus()) { 12059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project child.requestFocus(); 12069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // We unfocus the old child down here so the above hasFocus check 12099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // returns true 12106691fcfbc806ecfd884ab2e5ff75994d7ee3ddd5Romain Guy if (oldSelectedChild != null && oldSelectedChild != child) { 12119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure its drawable state doesn't contain 'selected' 12139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSelectedChild.setSelected(false); 12149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Make sure it is not focusable anymore, since otherwise arrow keys 12169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // can make this one be focused 12179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project oldSelectedChild.setFocusable(false); 12189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Describes how the child views are aligned. 12249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param gravity 12259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#Gallery_gravity 12279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setGravity(int gravity) 12299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 12309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mGravity != gravity) { 12319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mGravity = gravity; 12329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project requestLayout(); 12339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int getChildDrawingOrder(int childCount, int i) { 12389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selectedIndex = mSelectedPosition - mFirstPosition; 12399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Just to be safe 12419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selectedIndex < 0) return i; 12429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i == childCount - 1) { 12449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Draw the selected child last 12459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return selectedIndex; 12469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (i >= selectedIndex) { 12479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Move the children to the right of the selected child earlier one 12489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return i + 1; 12499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 12509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Keep the children to the left of the selected child the same 12519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return i; 12529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 12569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { 12579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.onFocusChanged(gainFocus, direction, previouslyFocusedRect); 12589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 12609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The gallery shows focus by focusing the selected item. So, give 12619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * focus to our selected item instead. We steal keys from our 12629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * selected item elsewhere. 12639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (gainFocus && mSelectedChild != null) { 12659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSelectedChild.requestFocus(direction); 12666691fcfbc806ecfd884ab2e5ff75994d7ee3ddd5Romain Guy mSelectedChild.setSelected(true); 12679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Responsible for fling behavior. Use {@link #startUsingVelocity(int)} to 12739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * initiate a fling. Each frame of the fling is handled in {@link #run()}. 12749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A FlingRunnable will keep re-posting itself until the fling is done. 12759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 12769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private class FlingRunnable implements Runnable { 12789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Tracks the decay of a fling scroll 12809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Scroller mScroller; 12829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 12849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * X value reported by mScroller on the previous fling 12859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 12869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mLastFlingX; 12879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public FlingRunnable() { 12899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller = new Scroller(getContext()); 12909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void startCommon() { 12939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Remove any pending flings 12949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeCallbacks(this); 12959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 12969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 12979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void startUsingVelocity(int initialVelocity) { 12989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (initialVelocity == 0) return; 12999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startCommon(); 13019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int initialX = initialVelocity < 0 ? Integer.MAX_VALUE : 0; 13039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastFlingX = initialX; 13049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.fling(initialX, 0, initialVelocity, 0, 13059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 0, Integer.MAX_VALUE, 0, Integer.MAX_VALUE); 13069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project post(this); 13079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void startUsingDistance(int distance) { 13109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (distance == 0) return; 13119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startCommon(); 13139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastFlingX = 0; 13159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.startScroll(0, 0, -distance, 0, mAnimationDuration); 13169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project post(this); 13179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void stop(boolean scrollIntoSlots) { 13209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeCallbacks(this); 13219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endFling(scrollIntoSlots); 13229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void endFling(boolean scrollIntoSlots) { 13259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 13269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Force the scroller's status to finished (without setting its 13279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position to the end) 13289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mScroller.forceFinished(true); 13309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (scrollIntoSlots) scrollIntoSlots(); 13329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 13359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mItemCount == 0) { 13379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endFling(true); 13389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 13399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mShouldStopFling = false; 13429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final Scroller scroller = mScroller; 13449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean more = scroller.computeScrollOffset(); 13459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final int x = scroller.getCurrX(); 13469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Flip sign to convert finger direction to list items direction 13489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // (e.g. finger moving down means list is moving towards the top) 13499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int delta = mLastFlingX - x; 13509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pretend that each frame of a fling scroll is a touch scroll 13529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (delta > 0) { 13539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Moving towards the left. Use first view as mDownTouchPosition 13549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchPosition = mFirstPosition; 13559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't fling more than 1 screen 13579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = Math.min(getWidth() - mPaddingLeft - mPaddingRight - 1, delta); 13589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Moving towards the right. Use last view as mDownTouchPosition 13609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offsetToLast = getChildCount() - 1; 13619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDownTouchPosition = mFirstPosition + offsetToLast; 13629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Don't fling more than 1 screen 13649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project delta = Math.max(-(getWidth() - mPaddingRight - mPaddingLeft - 1), delta); 13659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trackMotionScroll(delta); 13689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (more && !mShouldStopFling) { 13709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mLastFlingX = x; 13719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project post(this); 13729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 13739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project endFling(true); 13749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 13809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gallery extends LayoutParams to provide a place to hold current 13819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Transformation information along with previous position/transformation 13829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * info. 13839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 13849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 13859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static class LayoutParams extends ViewGroup.LayoutParams { 13869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public LayoutParams(Context c, AttributeSet attrs) { 13879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(c, attrs); 13889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public LayoutParams(int w, int h) { 13919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(w, h); 13929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 13949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public LayoutParams(ViewGroup.LayoutParams source) { 13959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(source); 13969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 13989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1399