1321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung/* 2321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * Copyright (C) 2010 The Android Open Source Project 3321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * 4321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * Licensed under the Apache License, Version 2.0 (the "License"); 5321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * you may not use this file except in compliance with the License. 6321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * You may obtain a copy of the License at 7321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * 8321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * http://www.apache.org/licenses/LICENSE-2.0 9321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * 10321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * Unless required by applicable law or agreed to in writing, software 11321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * distributed under the License is distributed on an "AS IS" BASIS, 12321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * See the License for the specific language governing permissions and 14321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * limitations under the License. 15321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 16321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 17321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungpackage com.android.launcher2; 18321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 19228a0faca6fd77f5cdd28a32ff20a311ec1bbffaWinson Chungimport android.animation.Animator; 20228a0faca6fd77f5cdd28a32ff20a311ec1bbffaWinson Chungimport android.animation.AnimatorListenerAdapter; 21bb6f6a52b6d176be253b1514af459a7aa4e998f8Winson Chungimport android.animation.ValueAnimator; 22321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.content.Context; 239c4949e12c909d5e01d24386147b1c528015b31bAdam Cohenimport android.content.res.TypedArray; 24321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.graphics.Canvas; 25321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.graphics.Rect; 2608055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganovimport android.os.Bundle; 27321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.os.Parcel; 28321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.os.Parcelable; 29321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.util.AttributeSet; 30785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chungimport android.util.Log; 31185d71647c8859cae7a375773b31c03f2f22ade1Winson Chungimport android.view.InputDevice; 32185d71647c8859cae7a375773b31c03f2f22ade1Winson Chungimport android.view.KeyEvent; 33321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.view.MotionEvent; 34321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.view.VelocityTracker; 35321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.view.View; 36321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.view.ViewConfiguration; 37321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.view.ViewGroup; 38321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.view.ViewParent; 396a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chungimport android.view.accessibility.AccessibilityEvent; 40c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chungimport android.view.accessibility.AccessibilityManager; 416a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chungimport android.view.accessibility.AccessibilityNodeInfo; 42e0f66b546994a9bdee452851c17a148db02ec300Adam Cohenimport android.view.animation.Interpolator; 43321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chungimport android.widget.Scroller; 44321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 450499834db3f9dc6fb0f5f57b5876b8503bce5189Winson Chungimport com.android.launcher.R; 4680baf5a6b3c62a62265f626d43d1167783c94131Winson Chung 476a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chungimport java.util.ArrayList; 486a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung 49321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung/** 50321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * An abstraction of the original Workspace which supports browsing through a 510142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka * sequential list of "pages" 52321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 538b805b17158886035b38261eb611d8641701ae43Michael Jurkapublic abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarchyChangeListener { 54321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung private static final String TAG = "PagedView"; 55785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung private static final boolean DEBUG = false; 560142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected static final int INVALID_PAGE = -1; 57321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 5886f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung // the min drag distance for a fling to register, to prevent random page shifts 599cfd25f16739548111ba8fc6ba8cd83010eccef6Winson Chung private static final int MIN_LENGTH_FOR_FLING = 25; 60321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 61f0c6ae0e35d3e020db55b5b826955da66b14b7f6Winson Chung protected static final int PAGE_SNAP_ANIMATION_DURATION = 550; 6297687ef66b209d39d6bc20aeb1496774b66fddd1Chet Haase protected static final int MAX_PAGE_SNAP_DURATION = 750; 63f0c6ae0e35d3e020db55b5b826955da66b14b7f6Winson Chung protected static final int SLOW_PAGE_SNAP_ANIMATION_DURATION = 950; 640142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected static final float NANOTIME_DIV = 1000000000.0f; 650142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 66b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen private static final float OVERSCROLL_ACCELERATE_FACTOR = 2; 67b26f3d6a8c62e7c1a603b6c7979375d8dd4f20d4Winson Chung private static final float OVERSCROLL_DAMP_FACTOR = 0.14f; 68867ca62c0e4b811d46734ff940d59c7a787525c8Winson Chung 69b64cb5a44bedcff0ea4b09cf8f1f5b6f95b0244eAdam Cohen private static final float RETURN_TO_ORIGINAL_PAGE_THRESHOLD = 0.33f; 7000481b3ed322b4f36b669201d2287964febda65fAdam Cohen // The page is moved more than halfway, automatically move to the next page on touch up. 7100481b3ed322b4f36b669201d2287964febda65fAdam Cohen private static final float SIGNIFICANT_MOVE_THRESHOLD = 0.4f; 7268d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen 73265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen // The following constants need to be scaled based on density. The scaled versions will be 74265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen // assigned to the corresponding member variables below. 75265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen private static final int FLING_THRESHOLD_VELOCITY = 500; 76265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen private static final int MIN_SNAP_VELOCITY = 1500; 77265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen private static final int MIN_FLING_VELOCITY = 250; 78265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen 798aad610dc58d810ec848a579c548f50c613c8641Winson Chung static final int AUTOMATIC_PAGE_SPACING = -1; 808aad610dc58d810ec848a579c548f50c613c8641Winson Chung 81265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen protected int mFlingThresholdVelocity; 82265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen protected int mMinFlingVelocity; 83265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen protected int mMinSnapVelocity; 840142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 85b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen protected float mDensity; 860142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected float mSmoothingTime; 870142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected float mTouchX; 88321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 890142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected boolean mFirstLayout = true; 900142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 910142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected int mCurrentPage; 920142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected int mNextPage = INVALID_PAGE; 9368d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen protected int mMaxScrollX; 940142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected Scroller mScroller; 95321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung private VelocityTracker mVelocityTracker; 96321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 97321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung private float mDownMotionX; 987426c42ce01e132781faa68941d79d23cd7fdf1eMichael Jurka protected float mLastMotionX; 99c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung protected float mLastMotionXRemainder; 1007426c42ce01e132781faa68941d79d23cd7fdf1eMichael Jurka protected float mLastMotionY; 101aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen protected float mTotalMotionX; 102f34bab59fc0260f926aec44d044883dce1b4191fAdam Cohen private int mLastScreenCenter = -1; 10373894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen private int[] mChildOffsets; 10473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen private int[] mChildRelativeOffsets; 10573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen private int[] mChildOffsetsWithLayoutScale; 106321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1070142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected final static int TOUCH_STATE_REST = 0; 1080142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected final static int TOUCH_STATE_SCROLLING = 1; 1090142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected final static int TOUCH_STATE_PREV_PAGE = 2; 1100142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected final static int TOUCH_STATE_NEXT_PAGE = 3; 111e45440ef0eb9edcde30767b38099b093c6a0d6b0Adam Cohen protected final static float ALPHA_QUANTIZE_LEVEL = 0.0001f; 112321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1130142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected int mTouchState = TOUCH_STATE_REST; 1142591f6a5202664faf8cde2b68361e3842ce76ba9Adam Cohen protected boolean mForceScreenScrolled = false; 115321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1160142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected OnLongClickListener mLongClickListener; 117321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1187426c42ce01e132781faa68941d79d23cd7fdf1eMichael Jurka protected boolean mAllowLongPress = true; 119321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1207426c42ce01e132781faa68941d79d23cd7fdf1eMichael Jurka protected int mTouchSlop; 121321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung private int mPagingTouchSlop; 122321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung private int mMaximumVelocity; 1231908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung private int mMinimumWidth; 1249c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen protected int mPageSpacing; 1259c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen protected int mPageLayoutPaddingTop; 1269c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen protected int mPageLayoutPaddingBottom; 1279c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen protected int mPageLayoutPaddingLeft; 1289c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen protected int mPageLayoutPaddingRight; 129df4b83dd9d6380ab963c62d1f9d1312efc87cb0fWinson Chung protected int mPageLayoutWidthGap; 130df4b83dd9d6380ab963c62d1f9d1312efc87cb0fWinson Chung protected int mPageLayoutHeightGap; 13187b1490c5a100619648b251cb2be05c457bede08Michael Jurka protected int mCellCountX = 0; 13287b1490c5a100619648b251cb2be05c457bede08Michael Jurka protected int mCellCountY = 0; 1337da1025bd7f15b04cf55c79b73e94e5e1bc959d9Winson Chung protected boolean mCenterPagesVertically; 13468d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen protected boolean mAllowOverScroll = true; 13568d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen protected int mUnboundedScrollX; 136dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka protected int[] mTempVisiblePagesRange = new int[2]; 1375e368ffbad2fb08e3eadab98eeefd4e1d05bdb2bMichael Jurka protected boolean mForceDrawAllChildrenNextFrame; 138321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1398b805b17158886035b38261eb611d8641701ae43Michael Jurka // mOverScrollX is equal to getScrollX() when we're within the normal scroll range. Otherwise 140ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen // it is equal to the scaled overscroll position. We use a separate value so as to prevent 141ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen // the screens from continuing to translate beyond the normal bounds. 142ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen protected int mOverScrollX; 143ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen 1448c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka // parameter that adjusts the layout to be optimized for pages with that scale factor 145d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka protected float mLayoutScale = 1.0f; 146d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka 1475f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka protected static final int INVALID_POINTER = -1; 148321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1495f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka protected int mActivePointerId = INVALID_POINTER; 150321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 15186f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung private PageSwitchListener mPageSwitchListener; 152321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 153e326f186af6b00e4ea32849f1527254c669d0600Michael Jurka protected ArrayList<Boolean> mDirtyPageContent; 154321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1550142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // If true, syncPages and syncPageItems will be called to refresh pages 1560142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected boolean mContentIsRefreshable = true; 1570142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 1580142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // If true, modify alpha of neighboring pages as user scrolls left/right 1590142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected boolean mFadeInAdjacentScreens = true; 1600142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 1610142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // It true, use a different slop parameter (pagingTouchSlop = 2 * touchSlop) for deciding 1620142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // to switch to a new page 1630142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected boolean mUsePagingTouchSlop = true; 1640142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 1658b805b17158886035b38261eb611d8641701ae43Michael Jurka // If true, the subclass should directly update scrollX itself in its computeScroll method 1660142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // (SmoothPagedView does this) 1670142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected boolean mDeferScrollUpdate = false; 1680142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 1691262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy protected boolean mIsPageMoving = false; 1701262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy 171f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung // All syncs and layout passes are deferred until data is ready. 172f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung protected boolean mIsDataReady = false; 173f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung 174007c69867d821ea2b271398577a8b3440b3a7046Winson Chung // Scrolling indicator 175bb6f6a52b6d176be253b1514af459a7aa4e998f8Winson Chung private ValueAnimator mScrollIndicatorAnimator; 176afaa05014e0bf3ed1192f9ddec2af4283bc50248Michael Jurka private View mScrollIndicator; 177f5f8cefb215fad98ae6d4487852e8b948aba3619Winson Chung private int mScrollIndicatorPaddingLeft; 178f5f8cefb215fad98ae6d4487852e8b948aba3619Winson Chung private int mScrollIndicatorPaddingRight; 179007c69867d821ea2b271398577a8b3440b3a7046Winson Chung private boolean mHasScrollIndicator = true; 180bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka private boolean mShouldShowScrollIndicator = false; 181bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka private boolean mShouldShowScrollIndicatorImmediately = false; 182a6427b15c18d5b8f3078f553d78f8432de9f46e9Winson Chung protected static final int sScrollIndicatorFadeInDuration = 150; 183a6427b15c18d5b8f3078f553d78f8432de9f46e9Winson Chung protected static final int sScrollIndicatorFadeOutDuration = 650; 184a6427b15c18d5b8f3078f553d78f8432de9f46e9Winson Chung protected static final int sScrollIndicatorFlashDuration = 650; 185bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase private boolean mScrollingPaused = false; 186007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 187b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung // If set, will defer loading associated pages until the scrolling settles 1884e076545e4ccdbd3c045a3fa33869a2b7519a0ccWinson Chung private boolean mDeferLoadAssociatedPagesUntilScrollCompletes; 189b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung 19086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung public interface PageSwitchListener { 19186f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung void onPageSwitch(View newPage, int newPageIndex); 192321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 193321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 194321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public PagedView(Context context) { 195321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung this(context, null); 196321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 197321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 198321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public PagedView(Context context, AttributeSet attrs) { 199321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung this(context, attrs, 0); 200321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 201321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 202321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public PagedView(Context context, AttributeSet attrs, int defStyle) { 203321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung super(context, attrs, defStyle); 204321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 2059c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen TypedArray a = context.obtainStyledAttributes(attrs, 2069c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen R.styleable.PagedView, defStyle, 0); 20760b0712bf555a32e609271e0b8ea90743a148efbAdam Cohen setPageSpacing(a.getDimensionPixelSize(R.styleable.PagedView_pageSpacing, 0)); 2089c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen mPageLayoutPaddingTop = a.getDimensionPixelSize( 2091908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung R.styleable.PagedView_pageLayoutPaddingTop, 0); 2109c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen mPageLayoutPaddingBottom = a.getDimensionPixelSize( 2111908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung R.styleable.PagedView_pageLayoutPaddingBottom, 0); 2129c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen mPageLayoutPaddingLeft = a.getDimensionPixelSize( 2131908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung R.styleable.PagedView_pageLayoutPaddingLeft, 0); 2149c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen mPageLayoutPaddingRight = a.getDimensionPixelSize( 2151908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung R.styleable.PagedView_pageLayoutPaddingRight, 0); 216df4b83dd9d6380ab963c62d1f9d1312efc87cb0fWinson Chung mPageLayoutWidthGap = a.getDimensionPixelSize( 2177d7541e7b48fdc114c24b3b0aa75e70d7228041eWinson Chung R.styleable.PagedView_pageLayoutWidthGap, 0); 218df4b83dd9d6380ab963c62d1f9d1312efc87cb0fWinson Chung mPageLayoutHeightGap = a.getDimensionPixelSize( 2197d7541e7b48fdc114c24b3b0aa75e70d7228041eWinson Chung R.styleable.PagedView_pageLayoutHeightGap, 0); 220f5f8cefb215fad98ae6d4487852e8b948aba3619Winson Chung mScrollIndicatorPaddingLeft = 221f5f8cefb215fad98ae6d4487852e8b948aba3619Winson Chung a.getDimensionPixelSize(R.styleable.PagedView_scrollIndicatorPaddingLeft, 0); 222f5f8cefb215fad98ae6d4487852e8b948aba3619Winson Chung mScrollIndicatorPaddingRight = 223f5f8cefb215fad98ae6d4487852e8b948aba3619Winson Chung a.getDimensionPixelSize(R.styleable.PagedView_scrollIndicatorPaddingRight, 0); 2249c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen a.recycle(); 2259c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen 226321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung setHapticFeedbackEnabled(false); 2270142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka init(); 228321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 229321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 230321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /** 231321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * Initializes various states for this workspace. 232321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 2330142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected void init() { 23486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mDirtyPageContent = new ArrayList<Boolean>(); 23586f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mDirtyPageContent.ensureCapacity(32); 236e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen mScroller = new Scroller(getContext(), new ScrollInterpolator()); 23786f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mCurrentPage = 0; 2387da1025bd7f15b04cf55c79b73e94e5e1bc959d9Winson Chung mCenterPagesVertically = true; 239321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 240321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final ViewConfiguration configuration = ViewConfiguration.get(getContext()); 241321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mTouchSlop = configuration.getScaledTouchSlop(); 242321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mPagingTouchSlop = configuration.getScaledPagingTouchSlop(); 243321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 244b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen mDensity = getResources().getDisplayMetrics().density; 245265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen 246265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen mFlingThresholdVelocity = (int) (FLING_THRESHOLD_VELOCITY * mDensity); 247265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen mMinFlingVelocity = (int) (MIN_FLING_VELOCITY * mDensity); 248265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen mMinSnapVelocity = (int) (MIN_SNAP_VELOCITY * mDensity); 2498b805b17158886035b38261eb611d8641701ae43Michael Jurka setOnHierarchyChangeListener(this); 250321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 251321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 25286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung public void setPageSwitchListener(PageSwitchListener pageSwitchListener) { 25386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mPageSwitchListener = pageSwitchListener; 25486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mPageSwitchListener != null) { 25586f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mPageSwitchListener.onPageSwitch(getPageAt(mCurrentPage), mCurrentPage); 256321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 257321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 258321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 259321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /** 26052aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung * Note: this is a reimplementation of View.isLayoutRtl() since that is currently hidden api. 26152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung */ 26252aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung public boolean isLayoutRtl() { 26352aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); 26452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } 26552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung 26652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung /** 267f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung * Called by subclasses to mark that data is ready, and that we can begin loading and laying 268f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung * out pages. 269f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung */ 270f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung protected void setDataIsReady() { 271f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung mIsDataReady = true; 272f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung } 273f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung protected boolean isDataReady() { 274f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung return mIsDataReady; 275f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung } 276f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung 277f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung /** 27886f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * Returns the index of the currently displayed page. 279321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * 28086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * @return The index of the currently displayed page. 281321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 28286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung int getCurrentPage() { 28386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung return mCurrentPage; 284321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 285360e63fd3e77247002b86da2a77bd8dfe8c8a807Winson Chung int getNextPage() { 286360e63fd3e77247002b86da2a77bd8dfe8c8a807Winson Chung return (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage; 287360e63fd3e77247002b86da2a77bd8dfe8c8a807Winson Chung } 288321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 28986f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung int getPageCount() { 290321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return getChildCount(); 291321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 292321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 29386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung View getPageAt(int index) { 294321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return getChildAt(index); 295321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 296321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 297ae4f155e090bf387b989fb738ee34ab045585711Adam Cohen protected int indexToPage(int index) { 298ae4f155e090bf387b989fb738ee34ab045585711Adam Cohen return index; 299ae4f155e090bf387b989fb738ee34ab045585711Adam Cohen } 300ae4f155e090bf387b989fb738ee34ab045585711Adam Cohen 301321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /** 302bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung * Updates the scroll of the current page immediately to its final scroll position. We use this 303bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung * in CustomizePagedView to allow tabs to share the same PagedView while resetting the scroll of 304bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung * the previous tab page. 305bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung */ 306bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung protected void updateCurrentPageScroll() { 3071ef2123ccdf35f2e20ab180111bfa76c46c997e3Winson Chung // If the current page is invalid, just reset the scroll position to zero 3081ef2123ccdf35f2e20ab180111bfa76c46c997e3Winson Chung int newX = 0; 3091ef2123ccdf35f2e20ab180111bfa76c46c997e3Winson Chung if (0 <= mCurrentPage && mCurrentPage < getPageCount()) { 3101ef2123ccdf35f2e20ab180111bfa76c46c997e3Winson Chung int offset = getChildOffset(mCurrentPage); 3111ef2123ccdf35f2e20ab180111bfa76c46c997e3Winson Chung int relOffset = getRelativeChildOffset(mCurrentPage); 3121ef2123ccdf35f2e20ab180111bfa76c46c997e3Winson Chung newX = offset - relOffset; 3131ef2123ccdf35f2e20ab180111bfa76c46c997e3Winson Chung } 314bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung scrollTo(newX, 0); 315bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung mScroller.setFinalX(newX); 316dd6c09123c2341a51fb285936cfffef48c594356Michael Jurka mScroller.forceFinished(true); 317bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung } 318bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung 319bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung /** 320bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase * Called during AllApps/Home transitions to avoid unnecessary work. When that other animation 321bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase * ends, {@link #resumeScrolling()} should be called, along with 322bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase * {@link #updateCurrentPageScroll()} to correctly set the final state and re-enable scrolling. 323bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase */ 324bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase void pauseScrolling() { 325bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase mScroller.forceFinished(true); 326bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase cancelScrollingIndicatorAnimations(); 327bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase mScrollingPaused = true; 328bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase } 329bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase 330bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase /** 331bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase * Enables scrolling again. 332bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase * @see #pauseScrolling() 333bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase */ 334bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase void resumeScrolling() { 335bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase mScrollingPaused = false; 336bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase } 337bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase /** 33886f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * Sets the current page. 339321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 34086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung void setCurrentPage(int currentPage) { 34172e0d34fc5d86260a7bd173aed44acf8b66b1c1dPatrick Dubroy if (!mScroller.isFinished()) { 34272e0d34fc5d86260a7bd173aed44acf8b66b1c1dPatrick Dubroy mScroller.abortAnimation(); 34372e0d34fc5d86260a7bd173aed44acf8b66b1c1dPatrick Dubroy } 344d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka // don't introduce any checks like mCurrentPage == currentPage here-- if we change the 345d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka // the default 346d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka if (getChildCount() == 0) { 34772e0d34fc5d86260a7bd173aed44acf8b66b1c1dPatrick Dubroy return; 34872e0d34fc5d86260a7bd173aed44acf8b66b1c1dPatrick Dubroy } 349321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 350bfeac0681b63091731c853fdafa3206642449a9dWinson Chung 35186f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mCurrentPage = Math.max(0, Math.min(currentPage, getPageCount() - 1)); 352bbc60d8e79416e37cbede55c159bf6aaa6c171d5Winson Chung updateCurrentPageScroll(); 3535a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung updateScrollingIndicator(); 35486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung notifyPageSwitchListener(); 355a12a2502e6a448d36ab7b8de46de0c1afe40b34fWinson Chung invalidate(); 356321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 357321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 3580142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected void notifyPageSwitchListener() { 35986f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mPageSwitchListener != null) { 36086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mPageSwitchListener.onPageSwitch(getPageAt(mCurrentPage), mCurrentPage); 361321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 362321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 363321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 364ce7e05fbe8abd5f25ec47e0e05b5cc76ceb39d2eMichael Jurka protected void pageBeginMoving() { 365d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka if (!mIsPageMoving) { 366d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka mIsPageMoving = true; 367d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka onPageBeginMoving(); 368d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka } 3691262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy } 3701262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy 371ce7e05fbe8abd5f25ec47e0e05b5cc76ceb39d2eMichael Jurka protected void pageEndMoving() { 372d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka if (mIsPageMoving) { 373d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka mIsPageMoving = false; 374d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka onPageEndMoving(); 375d74c984fcc61f86160476a2543faff715e3ee2fdMichael Jurka } 3761262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy } 3771262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy 37826976d9b53161f80faf822d482ac771b8621cf31Adam Cohen protected boolean isPageMoving() { 37926976d9b53161f80faf822d482ac771b8621cf31Adam Cohen return mIsPageMoving; 38026976d9b53161f80faf822d482ac771b8621cf31Adam Cohen } 38126976d9b53161f80faf822d482ac771b8621cf31Adam Cohen 3820142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // a method that subclasses can override to add behavior 3831262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy protected void onPageBeginMoving() { 3840142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 3850142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 3860142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // a method that subclasses can override to add behavior 3871262e369484ce7f2565655ed80e6299232c70bd7Patrick Dubroy protected void onPageEndMoving() { 3880142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 3890142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 390321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /** 39186f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * Registers the specified listener on each page contained in this workspace. 392321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * 393321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * @param l The listener used to respond to long clicks. 394321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 395321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 396321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void setOnLongClickListener(OnLongClickListener l) { 397321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mLongClickListener = l; 39886f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung final int count = getPageCount(); 399321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung for (int i = 0; i < count; i++) { 40086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung getPageAt(i).setOnLongClickListener(l); 401321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 402321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 403321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 404321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 40568d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen public void scrollBy(int x, int y) { 4068b805b17158886035b38261eb611d8641701ae43Michael Jurka scrollTo(mUnboundedScrollX + x, getScrollY() + y); 40768d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } 40868d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen 40968d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen @Override 4100142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka public void scrollTo(int x, int y) { 41152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final boolean isRtl = isLayoutRtl(); 41268d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen mUnboundedScrollX = x; 41368d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen 41452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung boolean isXBeforeFirstPage = isRtl ? (x > mMaxScrollX) : (x < 0); 41552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung boolean isXAfterLastPage = isRtl ? (x < 0) : (x > mMaxScrollX); 41652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (isXBeforeFirstPage) { 41768d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen super.scrollTo(0, y); 41868d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen if (mAllowOverScroll) { 41952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (isRtl) { 42052aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung overScroll(x - mMaxScrollX); 42152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } else { 42252aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung overScroll(x); 42352aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } 42468d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } 42552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } else if (isXAfterLastPage) { 42668d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen super.scrollTo(mMaxScrollX, y); 42768d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen if (mAllowOverScroll) { 42852aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (isRtl) { 42952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung overScroll(x); 43052aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } else { 43152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung overScroll(x - mMaxScrollX); 43252aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } 43368d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } 43468d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } else { 435ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen mOverScrollX = x; 43668d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen super.scrollTo(x, y); 43768d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } 43868d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen 4390142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mTouchX = x; 4400142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 4410142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 4420142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 4430142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // we moved this functionality to a helper function so SmoothPagedView can reuse it 4440142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected boolean computeScrollHelper() { 445321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (mScroller.computeScrollOffset()) { 446557d6ed50cc6560163440aa134870ef0bb11415bWinson Chung // Don't bother scrolling if the page does not need to be moved 4478b805b17158886035b38261eb611d8641701ae43Michael Jurka if (getScrollX() != mScroller.getCurrX() 4488b805b17158886035b38261eb611d8641701ae43Michael Jurka || getScrollY() != mScroller.getCurrY() 449b06d95fc79389ce49dc97ecaae23e05d931a6ac2Michael Jurka || mOverScrollX != mScroller.getCurrX()) { 450557d6ed50cc6560163440aa134870ef0bb11415bWinson Chung scrollTo(mScroller.getCurrX(), mScroller.getCurrY()); 451557d6ed50cc6560163440aa134870ef0bb11415bWinson Chung } 4520142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka invalidate(); 4530142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka return true; 45486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung } else if (mNextPage != INVALID_PAGE) { 45586f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mCurrentPage = Math.max(0, Math.min(mNextPage, getPageCount() - 1)); 45686f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mNextPage = INVALID_PAGE; 4570142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka notifyPageSwitchListener(); 458b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung 459b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung // Load the associated pages if necessary 4604e076545e4ccdbd3c045a3fa33869a2b7519a0ccWinson Chung if (mDeferLoadAssociatedPagesUntilScrollCompletes) { 461b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung loadAssociatedPages(mCurrentPage); 4624e076545e4ccdbd3c045a3fa33869a2b7519a0ccWinson Chung mDeferLoadAssociatedPagesUntilScrollCompletes = false; 463b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung } 464b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung 46573aa9755d3db1a76e9de0f55271ef5984d78ef6fAdam Cohen // We don't want to trigger a page end moving unless the page has settled 46673aa9755d3db1a76e9de0f55271ef5984d78ef6fAdam Cohen // and the user has stopped scrolling 46773aa9755d3db1a76e9de0f55271ef5984d78ef6fAdam Cohen if (mTouchState == TOUCH_STATE_REST) { 46873aa9755d3db1a76e9de0f55271ef5984d78ef6fAdam Cohen pageEndMoving(); 46973aa9755d3db1a76e9de0f55271ef5984d78ef6fAdam Cohen } 470c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chung 471c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chung // Notify the user when the page changes 4728b805b17158886035b38261eb611d8641701ae43Michael Jurka AccessibilityManager accessibilityManager = (AccessibilityManager) 4738b805b17158886035b38261eb611d8641701ae43Michael Jurka getContext().getSystemService(Context.ACCESSIBILITY_SERVICE); 4748b805b17158886035b38261eb611d8641701ae43Michael Jurka if (accessibilityManager.isEnabled()) { 475c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chung AccessibilityEvent ev = 476c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chung AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_SCROLLED); 477c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chung ev.getText().add(getCurrentPageDescription()); 478c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chung sendAccessibilityEventUnchecked(ev); 479c27d1bbb26f774a14122bc0b1d2ac33675439038Winson Chung } 4800142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka return true; 481321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 4820142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka return false; 4830142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 4840142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 4850142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka @Override 4860142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka public void computeScroll() { 4870142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka computeScrollHelper(); 488321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 489321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 490321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 491321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 492f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung if (!mIsDataReady) { 493f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung super.onMeasure(widthMeasureSpec, heightMeasureSpec); 494f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung return; 495f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung } 496f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung 497321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 498321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 4998aad610dc58d810ec848a579c548f50c613c8641Winson Chung final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 5008aad610dc58d810ec848a579c548f50c613c8641Winson Chung int heightSize = MeasureSpec.getSize(heightMeasureSpec); 501321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (widthMode != MeasureSpec.EXACTLY) { 502321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 503321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 504321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 5058aad610dc58d810ec848a579c548f50c613c8641Winson Chung // Return early if we aren't given a proper dimension 5068aad610dc58d810ec848a579c548f50c613c8641Winson Chung if (widthSize <= 0 || heightSize <= 0) { 5078aad610dc58d810ec848a579c548f50c613c8641Winson Chung super.onMeasure(widthMeasureSpec, heightMeasureSpec); 5088aad610dc58d810ec848a579c548f50c613c8641Winson Chung return; 5098aad610dc58d810ec848a579c548f50c613c8641Winson Chung } 5108aad610dc58d810ec848a579c548f50c613c8641Winson Chung 5116b879f0a5885274a85333531e091283405d490ccAdam Lesinski /* Allow the height to be set as WRAP_CONTENT. This allows the particular case 5126b879f0a5885274a85333531e091283405d490ccAdam Lesinski * of the All apps view on XLarge displays to not take up more space then it needs. Width 5136b879f0a5885274a85333531e091283405d490ccAdam Lesinski * is still not allowed to be set as WRAP_CONTENT since many parts of the code expect 5146b879f0a5885274a85333531e091283405d490ccAdam Lesinski * each page to have the same width. 5156b879f0a5885274a85333531e091283405d490ccAdam Lesinski */ 5166b879f0a5885274a85333531e091283405d490ccAdam Lesinski int maxChildHeight = 0; 5176b879f0a5885274a85333531e091283405d490ccAdam Lesinski 5188b805b17158886035b38261eb611d8641701ae43Michael Jurka final int verticalPadding = getPaddingTop() + getPaddingBottom(); 5198b805b17158886035b38261eb611d8641701ae43Michael Jurka final int horizontalPadding = getPaddingLeft() + getPaddingRight(); 520321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 52136fcb74425bebc1d88c9e3102484ec902b68f202Michael Jurka 522321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // The children are given the same width and height as the workspace 5235f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka // unless they were set to WRAP_CONTENT 524785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "PagedView.onMeasure(): " + widthSize + ", " + heightSize); 525321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int childCount = getChildCount(); 526321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung for (int i = 0; i < childCount; i++) { 5275f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka // disallowing padding in paged view (just pass 0) 52822f823d340710bcde587b18a1542570cbe0360f5Adam Cohen final View child = getPageAt(i); 5295f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 5305f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka 5315f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka int childWidthMode; 5325f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka if (lp.width == LayoutParams.WRAP_CONTENT) { 5335f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka childWidthMode = MeasureSpec.AT_MOST; 5345f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka } else { 5355f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka childWidthMode = MeasureSpec.EXACTLY; 5365f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka } 5375f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka 5385f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka int childHeightMode; 5395f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka if (lp.height == LayoutParams.WRAP_CONTENT) { 5405f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka childHeightMode = MeasureSpec.AT_MOST; 5415f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka } else { 5425f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka childHeightMode = MeasureSpec.EXACTLY; 5435f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka } 5445f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka 5455f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka final int childWidthMeasureSpec = 546ea359c6aee44c0fe3bb94f7002c3b49208b32b7fWinson Chung MeasureSpec.makeMeasureSpec(widthSize - horizontalPadding, childWidthMode); 5475f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka final int childHeightMeasureSpec = 5486b879f0a5885274a85333531e091283405d490ccAdam Lesinski MeasureSpec.makeMeasureSpec(heightSize - verticalPadding, childHeightMode); 5495f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka 5505f1c509d5ad1954a7e38e77db4d5f27c7345fd39Michael Jurka child.measure(childWidthMeasureSpec, childHeightMeasureSpec); 5516b879f0a5885274a85333531e091283405d490ccAdam Lesinski maxChildHeight = Math.max(maxChildHeight, child.getMeasuredHeight()); 552785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "\tmeasure-child" + i + ": " + child.getMeasuredWidth() + ", " 553785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung + child.getMeasuredHeight()); 5546b879f0a5885274a85333531e091283405d490ccAdam Lesinski } 5556b879f0a5885274a85333531e091283405d490ccAdam Lesinski 5566b879f0a5885274a85333531e091283405d490ccAdam Lesinski if (heightMode == MeasureSpec.AT_MOST) { 5576b879f0a5885274a85333531e091283405d490ccAdam Lesinski heightSize = maxChildHeight + verticalPadding; 558321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 559ae890b85dfbcdef592f4a97cca819922a07a83caWinson Chung 560ae890b85dfbcdef592f4a97cca819922a07a83caWinson Chung setMeasuredDimension(widthSize, heightSize); 561ae890b85dfbcdef592f4a97cca819922a07a83caWinson Chung 5628aad610dc58d810ec848a579c548f50c613c8641Winson Chung // We can't call getChildOffset/getRelativeChildOffset until we set the measured dimensions. 5638aad610dc58d810ec848a579c548f50c613c8641Winson Chung // We also wait until we set the measured dimensions before flushing the cache as well, to 5648aad610dc58d810ec848a579c548f50c613c8641Winson Chung // ensure that the cache is filled with good values. 5658aad610dc58d810ec848a579c548f50c613c8641Winson Chung invalidateCachedOffsets(); 5668aad610dc58d810ec848a579c548f50c613c8641Winson Chung 567a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung if (childCount > 0) { 568a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung if (DEBUG) Log.d(TAG, "getRelativeChildOffset(): " + getMeasuredWidth() + ", " 569a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung + getChildWidth(0)); 570a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung 571a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung // Calculate the variable page spacing if necessary 5728aad610dc58d810ec848a579c548f50c613c8641Winson Chung if (mPageSpacing == AUTOMATIC_PAGE_SPACING) { 573a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung // The gap between pages in the PagedView should be equal to the gap from the page 574a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung // to the edge of the screen (so it is not visible in the current screen). To 575a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung // account for unequal padding on each side of the paged view, we take the maximum 576a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung // of the left/right gap and use that as the gap between each page. 577a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung int offset = getRelativeChildOffset(0); 578a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung int spacing = Math.max(offset, widthSize - offset - 579a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung getChildAt(0).getMeasuredWidth()); 580a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung setPageSpacing(spacing); 581a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung } 582a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung } 583a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung 58425b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen updateScrollingIndicatorPosition(); 58525b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen 586faa28305134b0d391d2baf1bff5bff4710fe819fAdam Cohen if (childCount > 0) { 58752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int index = isLayoutRtl() ? 0 : childCount - 1; 58852aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung mMaxScrollX = getChildOffset(index) - getRelativeChildOffset(index); 589faa28305134b0d391d2baf1bff5bff4710fe819fAdam Cohen } else { 590faa28305134b0d391d2baf1bff5bff4710fe819fAdam Cohen mMaxScrollX = 0; 591faa28305134b0d391d2baf1bff5bff4710fe819fAdam Cohen } 592cfc629446ca86366665263dba6520a7b978b7c3eMichael Jurka } 593321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 5948c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka protected void scrollToNewPageWithoutMovingPages(int newCurrentPage) { 595af91de06b99e2d5d41ce79fefa34ce2111e51917Michael Jurka int newX = getChildOffset(newCurrentPage) - getRelativeChildOffset(newCurrentPage); 5968b805b17158886035b38261eb611d8641701ae43Michael Jurka int delta = newX - getScrollX(); 597af91de06b99e2d5d41ce79fefa34ce2111e51917Michael Jurka 5988c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka final int pageCount = getChildCount(); 5998c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka for (int i = 0; i < pageCount; i++) { 60022f823d340710bcde587b18a1542570cbe0360f5Adam Cohen View page = (View) getPageAt(i); 6018c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka page.setX(page.getX() + delta); 602af91de06b99e2d5d41ce79fefa34ce2111e51917Michael Jurka } 603af91de06b99e2d5d41ce79fefa34ce2111e51917Michael Jurka setCurrentPage(newCurrentPage); 604af91de06b99e2d5d41ce79fefa34ce2111e51917Michael Jurka } 605af91de06b99e2d5d41ce79fefa34ce2111e51917Michael Jurka 6068c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka // A layout scale of 1.0f assumes that the pages, in their unshrunken state, have a 6078c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka // scale of 1.0f. A layout scale of 0.8f assumes the pages have a scale of 0.8f, and 608d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka // tightens the layout accordingly 609d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka public void setLayoutScale(float childrenScale) { 610d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka mLayoutScale = childrenScale; 61173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen invalidateCachedOffsets(); 612d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka 613d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka // Now we need to do a re-layout, but preserving absolute X and Y coordinates 614d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka int childCount = getChildCount(); 615d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka float childrenX[] = new float[childCount]; 616d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka float childrenY[] = new float[childCount]; 617d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka for (int i = 0; i < childCount; i++) { 61822f823d340710bcde587b18a1542570cbe0360f5Adam Cohen final View child = getPageAt(i); 619d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka childrenX[i] = child.getX(); 620d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka childrenY[i] = child.getY(); 621d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka } 622b26f3d6a8c62e7c1a603b6c7979375d8dd4f20d4Winson Chung // Trigger a full re-layout (never just call onLayout directly!) 623b26f3d6a8c62e7c1a603b6c7979375d8dd4f20d4Winson Chung int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.EXACTLY); 624b26f3d6a8c62e7c1a603b6c7979375d8dd4f20d4Winson Chung int heightSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.EXACTLY); 625b26f3d6a8c62e7c1a603b6c7979375d8dd4f20d4Winson Chung requestLayout(); 626b26f3d6a8c62e7c1a603b6c7979375d8dd4f20d4Winson Chung measure(widthSpec, heightSpec); 6278b805b17158886035b38261eb611d8641701ae43Michael Jurka layout(getLeft(), getTop(), getRight(), getBottom()); 628d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka for (int i = 0; i < childCount; i++) { 62922f823d340710bcde587b18a1542570cbe0360f5Adam Cohen final View child = getPageAt(i); 630d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka child.setX(childrenX[i]); 631d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka child.setY(childrenY[i]); 632d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka } 633b26f3d6a8c62e7c1a603b6c7979375d8dd4f20d4Winson Chung 634d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka // Also, the page offset has changed (since the pages are now smaller); 635d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka // update the page offset, but again preserving absolute X and Y coordinates 6368c920dd3683d752aa4c43e964831ce53f9b72887Michael Jurka scrollToNewPageWithoutMovingPages(mCurrentPage); 637d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka } 638d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka 63960b0712bf555a32e609271e0b8ea90743a148efbAdam Cohen public void setPageSpacing(int pageSpacing) { 64060b0712bf555a32e609271e0b8ea90743a148efbAdam Cohen mPageSpacing = pageSpacing; 64160b0712bf555a32e609271e0b8ea90743a148efbAdam Cohen invalidateCachedOffsets(); 64260b0712bf555a32e609271e0b8ea90743a148efbAdam Cohen } 64360b0712bf555a32e609271e0b8ea90743a148efbAdam Cohen 644cfc629446ca86366665263dba6520a7b978b7c3eMichael Jurka @Override 64528750fba6a2d141eb9a1e566718c17236030b815Michael Jurka protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 646f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung if (!mIsDataReady) { 647f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung return; 648f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung } 649f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung 650785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "PagedView.onLayout()"); 6518b805b17158886035b38261eb611d8641701ae43Michael Jurka final int verticalPadding = getPaddingTop() + getPaddingBottom(); 652321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int childCount = getChildCount(); 65352aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final boolean isRtl = isLayoutRtl(); 654321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 65552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int startIndex = isRtl ? childCount - 1 : 0; 65652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int endIndex = isRtl ? -1 : childCount; 65752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int delta = isRtl ? -1 : 1; 65852aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung int childLeft = getRelativeChildOffset(startIndex); 65952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung for (int i = startIndex; i != endIndex; i += delta) { 66022f823d340710bcde587b18a1542570cbe0360f5Adam Cohen final View child = getPageAt(i); 661321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (child.getVisibility() != View.GONE) { 662d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka final int childWidth = getScaledMeasuredWidth(child); 6636b879f0a5885274a85333531e091283405d490ccAdam Lesinski final int childHeight = child.getMeasuredHeight(); 6648b805b17158886035b38261eb611d8641701ae43Michael Jurka int childTop = getPaddingTop(); 6656b879f0a5885274a85333531e091283405d490ccAdam Lesinski if (mCenterPagesVertically) { 6666b879f0a5885274a85333531e091283405d490ccAdam Lesinski childTop += ((getMeasuredHeight() - verticalPadding) - childHeight) / 2; 6676b879f0a5885274a85333531e091283405d490ccAdam Lesinski } 668d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka 669785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "\tlayout-child" + i + ": " + childLeft + ", " + childTop); 6706b879f0a5885274a85333531e091283405d490ccAdam Lesinski child.layout(childLeft, childTop, 671d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka childLeft + child.getMeasuredWidth(), childTop + childHeight); 6729c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen childLeft += childWidth + mPageSpacing; 673321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 674321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 675c3665faf4525de78c64e1a98106e12f1c23810c9Winson Chung 676c3665faf4525de78c64e1a98106e12f1c23810c9Winson Chung if (mFirstLayout && mCurrentPage >= 0 && mCurrentPage < getChildCount()) { 677c3665faf4525de78c64e1a98106e12f1c23810c9Winson Chung setHorizontalScrollBarEnabled(false); 678dd6c09123c2341a51fb285936cfffef48c594356Michael Jurka updateCurrentPageScroll(); 679c3665faf4525de78c64e1a98106e12f1c23810c9Winson Chung setHorizontalScrollBarEnabled(true); 680c3665faf4525de78c64e1a98106e12f1c23810c9Winson Chung mFirstLayout = false; 681c3665faf4525de78c64e1a98106e12f1c23810c9Winson Chung } 682321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 683321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 68473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen protected void screenScrolled(int screenCenter) { 68573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen if (isScrollingIndicatorEnabled()) { 68673894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen updateScrollingIndicator(); 68773894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 688869390b6abd6e005a5ce85a8ee3c11daeecce919Michael Jurka boolean isInOverscroll = mOverScrollX < 0 || mOverScrollX > mMaxScrollX; 689869390b6abd6e005a5ce85a8ee3c11daeecce919Michael Jurka 690869390b6abd6e005a5ce85a8ee3c11daeecce919Michael Jurka if (mFadeInAdjacentScreens && !isInOverscroll) { 69173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen for (int i = 0; i < getChildCount(); i++) { 69273894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen View child = getChildAt(i); 69373894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen if (child != null) { 69473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen float scrollProgress = getScrollProgress(screenCenter, child, i); 69573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen float alpha = 1 - Math.abs(scrollProgress); 6967372c59277a23a31eeb1513a554b29d7bf05aedbMichael Jurka child.setAlpha(alpha); 697affd7b4d23cecb4ed74133dd8bd9a5ede099c562Winson Chung } 698321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 69973894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen invalidate(); 700321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 701e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung } 7020142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 703e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung @Override 7048b805b17158886035b38261eb611d8641701ae43Michael Jurka public void onChildViewAdded(View parent, View child) { 7052591f6a5202664faf8cde2b68361e3842ce76ba9Adam Cohen // This ensures that when children are added, they get the correct transforms / alphas 7062591f6a5202664faf8cde2b68361e3842ce76ba9Adam Cohen // in accordance with any scroll effects. 7072591f6a5202664faf8cde2b68361e3842ce76ba9Adam Cohen mForceScreenScrolled = true; 7082591f6a5202664faf8cde2b68361e3842ce76ba9Adam Cohen invalidate(); 70925b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen invalidateCachedOffsets(); 7102591f6a5202664faf8cde2b68361e3842ce76ba9Adam Cohen } 7112591f6a5202664faf8cde2b68361e3842ce76ba9Adam Cohen 7128b805b17158886035b38261eb611d8641701ae43Michael Jurka @Override 7138b805b17158886035b38261eb611d8641701ae43Michael Jurka public void onChildViewRemoved(View parent, View child) { 7148b805b17158886035b38261eb611d8641701ae43Michael Jurka } 7158b805b17158886035b38261eb611d8641701ae43Michael Jurka 71673894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen protected void invalidateCachedOffsets() { 71773894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen int count = getChildCount(); 71825b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen if (count == 0) { 71925b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen mChildOffsets = null; 72025b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen mChildRelativeOffsets = null; 72125b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen mChildOffsetsWithLayoutScale = null; 72225b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen return; 72325b2995c6723c01fbabcea04636358501bc8d17aAdam Cohen } 72473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen 72573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildOffsets = new int[count]; 72673894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildRelativeOffsets = new int[count]; 72773894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildOffsetsWithLayoutScale = new int[count]; 72873894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen for (int i = 0; i < count; i++) { 72973894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildOffsets[i] = -1; 73073894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildRelativeOffsets[i] = -1; 73173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildOffsetsWithLayoutScale[i] = -1; 73273894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 73373894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 73473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen 73573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen protected int getChildOffset(int index) { 73652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final boolean isRtl = isLayoutRtl(); 73773894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen int[] childOffsets = Float.compare(mLayoutScale, 1f) == 0 ? 73873894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildOffsets : mChildOffsetsWithLayoutScale; 73973894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen 74073894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen if (childOffsets != null && childOffsets[index] != -1) { 74173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen return childOffsets[index]; 74273894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } else { 74373894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen if (getChildCount() == 0) 74473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen return 0; 74573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen 74652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int startIndex = isRtl ? getChildCount() - 1 : 0; 74752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int endIndex = isRtl ? index : index; 74852aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int delta = isRtl ? -1 : 1; 74952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung int offset = getRelativeChildOffset(startIndex); 75052aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung for (int i = startIndex; i != endIndex; i += delta) { 75173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen offset += getScaledMeasuredWidth(getPageAt(i)) + mPageSpacing; 75273894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 75373894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen if (childOffsets != null) { 75473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen childOffsets[index] = offset; 75573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 75673894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen return offset; 75773894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 75873894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 75973894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen 76073894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen protected int getRelativeChildOffset(int index) { 76173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen if (mChildRelativeOffsets != null && mChildRelativeOffsets[index] != -1) { 76273894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen return mChildRelativeOffsets[index]; 76373894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } else { 7648b805b17158886035b38261eb611d8641701ae43Michael Jurka final int padding = getPaddingLeft() + getPaddingRight(); 7658b805b17158886035b38261eb611d8641701ae43Michael Jurka final int offset = getPaddingLeft() + 76673894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen (getMeasuredWidth() - padding - getChildWidth(index)) / 2; 76773894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen if (mChildRelativeOffsets != null) { 76873894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen mChildRelativeOffsets[index] = offset; 76973894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 77073894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen return offset; 77173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 77273894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 77373894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen 77473894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen protected int getScaledMeasuredWidth(View child) { 77573894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen // This functions are called enough times that it actually makes a difference in the 77673894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen // profiler -- so just inline the max() here 77773894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen final int measuredWidth = child.getMeasuredWidth(); 77873894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen final int minWidth = mMinimumWidth; 77973894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen final int maxWidth = (minWidth > measuredWidth) ? minWidth : measuredWidth; 78073894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen return (int) (maxWidth * mLayoutScale + 0.5f); 78173894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen } 78273894964c27f68a3a7ffb45bfba76520613fd3f0Adam Cohen 783dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka protected void getVisiblePages(int[] range) { 78452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final boolean isRtl = isLayoutRtl(); 7850142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka final int pageCount = getChildCount(); 7864ff7d79ddcee0a95fe6e7458731decd694b91d03Michael Jurka 787c4fb9173e73c0092a089512734c0d7df13189014Michael Jurka if (pageCount > 0) { 788c4fb9173e73c0092a089512734c0d7df13189014Michael Jurka final int screenWidth = getMeasuredWidth(); 78952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung int leftScreen = isRtl ? pageCount - 1 : 0; 790c4fb9173e73c0092a089512734c0d7df13189014Michael Jurka int rightScreen = 0; 79152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung int endIndex = isRtl ? 0 : pageCount - 1; 79252aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung int delta = isRtl ? -1 : 1; 79347f747418efa337e0fc56e10748a6a595b8974f6Michael Jurka View currPage = getPageAt(leftScreen); 79452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung while (leftScreen != endIndex && 7958b805b17158886035b38261eb611d8641701ae43Michael Jurka currPage.getX() + currPage.getWidth() - 7968b805b17158886035b38261eb611d8641701ae43Michael Jurka currPage.getPaddingRight() < getScrollX()) { 79752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung leftScreen += delta; 79847f747418efa337e0fc56e10748a6a595b8974f6Michael Jurka currPage = getPageAt(leftScreen); 799c4fb9173e73c0092a089512734c0d7df13189014Michael Jurka } 800c4fb9173e73c0092a089512734c0d7df13189014Michael Jurka rightScreen = leftScreen; 80152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung currPage = getPageAt(rightScreen + delta); 80252aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung while (rightScreen != endIndex && 8038b805b17158886035b38261eb611d8641701ae43Michael Jurka currPage.getX() - currPage.getPaddingLeft() < getScrollX() + screenWidth) { 80452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung rightScreen += delta; 80552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung currPage = getPageAt(rightScreen + delta); 806c4fb9173e73c0092a089512734c0d7df13189014Michael Jurka } 80752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung range[0] = Math.min(leftScreen, rightScreen); 80852aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung range[1] = Math.max(leftScreen, rightScreen); 809dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka } else { 810dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka range[0] = -1; 811dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka range[1] = -1; 812dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka } 813dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka } 814dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka 815920d7f433e5be7b928fe52312c2e65d278b13ee5Michael Jurka protected boolean shouldDrawChild(View child) { 816920d7f433e5be7b928fe52312c2e65d278b13ee5Michael Jurka return child.getAlpha() > 0; 817920d7f433e5be7b928fe52312c2e65d278b13ee5Michael Jurka } 818920d7f433e5be7b928fe52312c2e65d278b13ee5Michael Jurka 819dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka @Override 820dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka protected void dispatchDraw(Canvas canvas) { 821dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka int halfScreenSize = getMeasuredWidth() / 2; 8228b805b17158886035b38261eb611d8641701ae43Michael Jurka // mOverScrollX is equal to getScrollX() when we're within the normal scroll range. 8238b805b17158886035b38261eb611d8641701ae43Michael Jurka // Otherwise it is equal to the scaled overscroll position. 824ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen int screenCenter = mOverScrollX + halfScreenSize; 825dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka 826dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka if (screenCenter != mLastScreenCenter || mForceScreenScrolled) { 827b06d95fc79389ce49dc97ecaae23e05d931a6ac2Michael Jurka // set mForceScreenScrolled before calling screenScrolled so that screenScrolled can 828b06d95fc79389ce49dc97ecaae23e05d931a6ac2Michael Jurka // set it for the next frame 829b06d95fc79389ce49dc97ecaae23e05d931a6ac2Michael Jurka mForceScreenScrolled = false; 830dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka screenScrolled(screenCenter); 831dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka mLastScreenCenter = screenCenter; 832dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka } 833dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka 834dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka // Find out which screens are visible; as an optimization we only call draw on them 835dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka final int pageCount = getChildCount(); 836dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka if (pageCount > 0) { 837dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka getVisiblePages(mTempVisiblePagesRange); 838dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka final int leftScreen = mTempVisiblePagesRange[0]; 839dde558b8b8bcf3fac6d2ceceafa1f7546f98a264Michael Jurka final int rightScreen = mTempVisiblePagesRange[1]; 840c6f10b906fc9c120cafc81046a42b2434ff635a9Winson Chung if (leftScreen != -1 && rightScreen != -1) { 841c6f10b906fc9c120cafc81046a42b2434ff635a9Winson Chung final long drawingTime = getDrawingTime(); 842c6f10b906fc9c120cafc81046a42b2434ff635a9Winson Chung // Clip to the bounds 843c6f10b906fc9c120cafc81046a42b2434ff635a9Winson Chung canvas.save(); 8448b805b17158886035b38261eb611d8641701ae43Michael Jurka canvas.clipRect(getScrollX(), getScrollY(), getScrollX() + getRight() - getLeft(), 8458b805b17158886035b38261eb611d8641701ae43Michael Jurka getScrollY() + getBottom() - getTop()); 846c6f10b906fc9c120cafc81046a42b2434ff635a9Winson Chung 84780c69853d64b73e5d62ed33bea1b10680557ee3eMichael Jurka for (int i = getChildCount() - 1; i >= 0; i--) { 84880c69853d64b73e5d62ed33bea1b10680557ee3eMichael Jurka final View v = getPageAt(i); 8495e368ffbad2fb08e3eadab98eeefd4e1d05bdb2bMichael Jurka if (mForceDrawAllChildrenNextFrame || 8505e368ffbad2fb08e3eadab98eeefd4e1d05bdb2bMichael Jurka (leftScreen <= i && i <= rightScreen && shouldDrawChild(v))) { 85180c69853d64b73e5d62ed33bea1b10680557ee3eMichael Jurka drawChild(canvas, v, drawingTime); 85280c69853d64b73e5d62ed33bea1b10680557ee3eMichael Jurka } 853c6f10b906fc9c120cafc81046a42b2434ff635a9Winson Chung } 8545e368ffbad2fb08e3eadab98eeefd4e1d05bdb2bMichael Jurka mForceDrawAllChildrenNextFrame = false; 855c6f10b906fc9c120cafc81046a42b2434ff635a9Winson Chung canvas.restore(); 856c4fb9173e73c0092a089512734c0d7df13189014Michael Jurka } 8570142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 858321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 859321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 860321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 861321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { 862ae4f155e090bf387b989fb738ee34ab045585711Adam Cohen int page = indexToPage(indexOfChild(child)); 86386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (page != mCurrentPage || !mScroller.isFinished()) { 86486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung snapToPage(page); 865321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return true; 866321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 867321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return false; 868321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 869321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 870321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 871321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 87286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung int focusablePage; 87386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mNextPage != INVALID_PAGE) { 87486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung focusablePage = mNextPage; 875321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 87686f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung focusablePage = mCurrentPage; 877321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 87886f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung View v = getPageAt(focusablePage); 879321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (v != null) { 88076fc085d28178a5d4fb3787ede956281a2cc3179Adam Cohen return v.requestFocus(direction, previouslyFocusedRect); 881321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 882321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return false; 883321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 884321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 885321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 886321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public boolean dispatchUnhandledMove(View focused, int direction) { 88752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung // XXX-RTL: This will be fixed in a future CL 888321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (direction == View.FOCUS_LEFT) { 88986f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (getCurrentPage() > 0) { 89086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung snapToPage(getCurrentPage() - 1); 891321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return true; 892321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 893321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else if (direction == View.FOCUS_RIGHT) { 89486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (getCurrentPage() < getPageCount() - 1) { 89586f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung snapToPage(getCurrentPage() + 1); 896321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return true; 897321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 898321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 899321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return super.dispatchUnhandledMove(focused, direction); 900321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 901321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 902321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 903321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 90452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung // XXX-RTL: This will be fixed in a future CL 90586f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mCurrentPage >= 0 && mCurrentPage < getPageCount()) { 906af51995758ffa082ee082414431b6850a923d49aalanv getPageAt(mCurrentPage).addFocusables(views, direction, focusableMode); 907321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 908321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (direction == View.FOCUS_LEFT) { 90986f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mCurrentPage > 0) { 910af51995758ffa082ee082414431b6850a923d49aalanv getPageAt(mCurrentPage - 1).addFocusables(views, direction, focusableMode); 911321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 912321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else if (direction == View.FOCUS_RIGHT){ 91386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mCurrentPage < getPageCount() - 1) { 914af51995758ffa082ee082414431b6850a923d49aalanv getPageAt(mCurrentPage + 1).addFocusables(views, direction, focusableMode); 915321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 916321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 917321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 918321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 919321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /** 920321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * If one of our descendant views decides that it could be focused now, only 92186f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * pass that along if it's on the current page. 922321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * 92386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * This happens when live folders requery, and if they're off page, they 92486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * end up calling requestFocus, which pulls it on page. 925321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 926321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 927321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void focusableViewAvailable(View focused) { 92886f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung View current = getPageAt(mCurrentPage); 929321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung View v = focused; 930321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung while (true) { 931321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (v == current) { 932321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung super.focusableViewAvailable(focused); 933321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return; 934321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 935321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (v == this) { 936321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return; 937321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 938321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung ViewParent parent = v.getParent(); 939321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (parent instanceof View) { 940321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung v = (View)v.getParent(); 941321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 942321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return; 943321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 944321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 945321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 946321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 947321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /** 948321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * {@inheritDoc} 949321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 950321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 951321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) { 952321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (disallowIntercept) { 953321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // We need to make sure to cancel our long press if 954321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // a scrollable widget takes over touch events 95522f823d340710bcde587b18a1542570cbe0360f5Adam Cohen final View currentPage = getPageAt(mCurrentPage); 95686f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung currentPage.cancelLongPress(); 957321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 958321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung super.requestDisallowInterceptTouchEvent(disallowIntercept); 959321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 960321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 961d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy /** 962d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy * Return true if a tap at (x, y) should trigger a flip to the previous page. 963d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy */ 964d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy protected boolean hitsPreviousPage(float x, float y) { 96552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (isLayoutRtl()) { 96652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung return (x > (getMeasuredWidth() - getRelativeChildOffset(mCurrentPage) + mPageSpacing)); 96752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } else { 96852aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung return (x < getRelativeChildOffset(mCurrentPage) - mPageSpacing); 96952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } 970d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy } 971d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy 972d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy /** 973d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy * Return true if a tap at (x, y) should trigger a flip to the next page. 974d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy */ 975d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy protected boolean hitsNextPage(float x, float y) { 97652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (isLayoutRtl()) { 97752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung return (x < getRelativeChildOffset(mCurrentPage) - mPageSpacing); 97852aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } else { 97952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung return (x > (getMeasuredWidth() - getRelativeChildOffset(mCurrentPage) + mPageSpacing)); 98052aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } 98152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung 982d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy } 983d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy 984321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 985321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public boolean onInterceptTouchEvent(MotionEvent ev) { 986321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 987321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * This method JUST determines whether we want to intercept the motion. 988321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * If we return true, onTouchEvent will be called and we do the actual 989321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * scrolling there. 990321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 9916342bbae1a18f3c1862953e33309481703f541cfAdam Cohen acquireVelocityTrackerAndAddMovement(ev); 992321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 99345e1d6ec0a213a444d01466c3d4f1ded5508ed63Winson Chung // Skip touch handling if there are no pages to swipe 99445e1d6ec0a213a444d01466c3d4f1ded5508ed63Winson Chung if (getChildCount() <= 0) return super.onInterceptTouchEvent(ev); 99545e1d6ec0a213a444d01466c3d4f1ded5508ed63Winson Chung 996321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 997321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * Shortcut the most recurring case: the user is in the dragging 998321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * state and he is moving his finger. We want to intercept this 999321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * motion. 1000321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 1001321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int action = ev.getAction(); 1002321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if ((action == MotionEvent.ACTION_MOVE) && 1003321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung (mTouchState == TOUCH_STATE_SCROLLING)) { 1004321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return true; 1005321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1006321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1007321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung switch (action & MotionEvent.ACTION_MASK) { 1008321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_MOVE: { 1009321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 1010321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 1011321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * whether the user has moved far enough from his original down touch. 1012321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 10131ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka if (mActivePointerId != INVALID_POINTER) { 10141ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka determineScrollingStart(ev); 10151ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka break; 10161ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka } 10171ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka // if mActivePointerId is INVALID_POINTER, then we must have missed an ACTION_DOWN 10181ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka // event. in that case, treat the first occurence of a move event as a ACTION_DOWN 10191ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka // i.e. fall through to the next case (don't break) 10201ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka // (We sometimes miss ACTION_DOWN events in Workspace because it ignores all events 10211ff706b8c03063740ca74868fea46fa47d71bb27Michael Jurka // while it's small- this was causing a crash before we checked for INVALID_POINTER) 1022321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1023321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1024321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_DOWN: { 1025321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final float x = ev.getX(); 1026321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final float y = ev.getY(); 1027321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // Remember location of down touch 1028321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mDownMotionX = x; 1029321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mLastMotionX = x; 1030321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mLastMotionY = y; 1031c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung mLastMotionXRemainder = 0; 1032aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen mTotalMotionX = 0; 1033321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mActivePointerId = ev.getPointerId(0); 1034321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mAllowLongPress = true; 1035321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1036321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 1037321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * If being flinged and user touches the screen, initiate drag; 1038321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * otherwise don't. mScroller.isFinished should be false when 1039321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * being flinged. 1040321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 1041fd177c1d10085e5e12ff7df27d956a378d1139b1Michael Jurka final int xDist = Math.abs(mScroller.getFinalX() - mScroller.getCurrX()); 10425f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung final boolean finishedScrolling = (mScroller.isFinished() || xDist < mTouchSlop); 10435f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung if (finishedScrolling) { 10445f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung mTouchState = TOUCH_STATE_REST; 10455f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung mScroller.abortAnimation(); 10465f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung } else { 10475f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung mTouchState = TOUCH_STATE_SCROLLING; 10485f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung } 1049321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 105086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung // check if this can be the beginning of a tap on the side of the pages 1051321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // to scroll the current page 1052d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy if (mTouchState != TOUCH_STATE_PREV_PAGE && mTouchState != TOUCH_STATE_NEXT_PAGE) { 1053321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (getChildCount() > 0) { 1054d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy if (hitsPreviousPage(x, y)) { 1055321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mTouchState = TOUCH_STATE_PREV_PAGE; 1056d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy } else if (hitsNextPage(x, y)) { 1057321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mTouchState = TOUCH_STATE_NEXT_PAGE; 1058321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1059321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1060321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1061321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1062321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1063321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1064321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_UP: 10651d0867c8de6a889bccde9b7e768daef182a25e5cJeff Brown case MotionEvent.ACTION_CANCEL: 1066321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mTouchState = TOUCH_STATE_REST; 1067321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mAllowLongPress = false; 1068321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mActivePointerId = INVALID_POINTER; 10696342bbae1a18f3c1862953e33309481703f541cfAdam Cohen releaseVelocityTracker(); 1070321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1071321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1072321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_POINTER_UP: 1073321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung onSecondaryPointerUp(ev); 10746342bbae1a18f3c1862953e33309481703f541cfAdam Cohen releaseVelocityTracker(); 1075321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1076321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1077321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1078321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 1079321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * The only time we want to intercept motion events is if we are in the 1080321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * drag mode. 1081321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 1082321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return mTouchState != TOUCH_STATE_REST; 1083321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1084321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1085f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen protected void determineScrollingStart(MotionEvent ev) { 1086f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen determineScrollingStart(ev, 1.0f); 1087f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen } 1088f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen 1089321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 1090321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * Determines if we should change the touch state to start scrolling after the 1091321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * user moves their touch point too far. 1092321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 1093f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen protected void determineScrollingStart(MotionEvent ev, float touchSlopScale) { 1094321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 1095321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * Locally do absolute value. mLastMotionX is set to the y value 1096321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * of the down event. 1097321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 1098321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int pointerIndex = ev.findPointerIndex(mActivePointerId); 10992698db4df3d2f9aa2a2c16af6760d63ba1ac354eMichael Jurka if (pointerIndex == -1) { 11002698db4df3d2f9aa2a2c16af6760d63ba1ac354eMichael Jurka return; 11012698db4df3d2f9aa2a2c16af6760d63ba1ac354eMichael Jurka } 1102321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final float x = ev.getX(pointerIndex); 1103321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final float y = ev.getY(pointerIndex); 1104321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int xDiff = (int) Math.abs(x - mLastMotionX); 1105321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int yDiff = (int) Math.abs(y - mLastMotionY); 1106321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1107f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen final int touchSlop = Math.round(touchSlopScale * mTouchSlop); 1108321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung boolean xPaged = xDiff > mPagingTouchSlop; 1109321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung boolean xMoved = xDiff > touchSlop; 1110321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung boolean yMoved = yDiff > touchSlop; 1111321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1112f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen if (xMoved || xPaged || yMoved) { 11130142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (mUsePagingTouchSlop ? xPaged : xMoved) { 1114321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // Scroll if the user moved far enough along the X axis 1115321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mTouchState = TOUCH_STATE_SCROLLING; 11166342bbae1a18f3c1862953e33309481703f541cfAdam Cohen mTotalMotionX += Math.abs(mLastMotionX - x); 1117321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mLastMotionX = x; 1118c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung mLastMotionXRemainder = 0; 11198b805b17158886035b38261eb611d8641701ae43Michael Jurka mTouchX = getScrollX(); 11200142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 11210142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka pageBeginMoving(); 1122321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1123321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // Either way, cancel any pending longpress 1124f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen cancelCurrentPageLongPress(); 1125f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen } 1126f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen } 1127f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen 1128f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen protected void cancelCurrentPageLongPress() { 1129f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen if (mAllowLongPress) { 1130f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen mAllowLongPress = false; 1131f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen // Try canceling the long press. It could also have been scheduled 1132f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen // by a distant descendant, so use the mAllowLongPress flag to block 1133f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen // everything 1134f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen final View currentPage = getPageAt(mCurrentPage); 1135f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen if (currentPage != null) { 1136f8d2823d885ba682140aee1ae0504c1c5e67a24bAdam Cohen currentPage.cancelLongPress(); 1137321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1138321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1139321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1140321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1141b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen protected float getScrollProgress(int screenCenter, View v, int page) { 1142b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen final int halfScreenSize = getMeasuredWidth() / 2; 1143b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1144b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen int totalDistance = getScaledMeasuredWidth(v) + mPageSpacing; 1145b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen int delta = screenCenter - (getChildOffset(page) - 1146b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen getRelativeChildOffset(page) + halfScreenSize); 1147b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1148b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen float scrollProgress = delta / (totalDistance * 1.0f); 1149b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen scrollProgress = Math.min(scrollProgress, 1.0f); 1150b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen scrollProgress = Math.max(scrollProgress, -1.0f); 1151b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen return scrollProgress; 1152b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen } 1153b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1154e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // This curve determines how the effect of scrolling over the limits of the page dimishes 1155e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // as the user pulls further and further from the bounds 1156e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen private float overScrollInfluenceCurve(float f) { 1157e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen f -= 1.0f; 1158e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen return f * f * f + 1.0f; 1159e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen } 1160e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1161b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen protected void acceleratedOverScroll(float amount) { 1162b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen int screenSize = getMeasuredWidth(); 1163b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1164b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen // We want to reach the max over scroll effect when the user has 1165b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen // over scrolled half the size of the screen 1166b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen float f = OVERSCROLL_ACCELERATE_FACTOR * (amount / screenSize); 1167b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1168b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen if (f == 0) return; 1169b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1170b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen // Clamp this factor, f, to -1 < f < 1 1171b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen if (Math.abs(f) >= 1) { 1172b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen f /= Math.abs(f); 1173b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen } 1174b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1175b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen int overScrollAmount = (int) Math.round(f * screenSize); 1176b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen if (amount < 0) { 1177ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen mOverScrollX = overScrollAmount; 11788b805b17158886035b38261eb611d8641701ae43Michael Jurka super.scrollTo(0, getScrollY()); 1179b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen } else { 1180ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen mOverScrollX = mMaxScrollX + overScrollAmount; 11818b805b17158886035b38261eb611d8641701ae43Michael Jurka super.scrollTo(mMaxScrollX, getScrollY()); 1182b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen } 1183b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen invalidate(); 1184b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen } 1185b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1186b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen protected void dampedOverScroll(float amount) { 1187e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen int screenSize = getMeasuredWidth(); 1188e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1189e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen float f = (amount / screenSize); 1190e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1191e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen if (f == 0) return; 1192e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen f = f / (Math.abs(f)) * (overScrollInfluenceCurve(Math.abs(f))); 1193e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 11947bfc979594b083c36f6a08e49273ef7c9ad7b13aAdam Cohen // Clamp this factor, f, to -1 < f < 1 11957bfc979594b083c36f6a08e49273ef7c9ad7b13aAdam Cohen if (Math.abs(f) >= 1) { 11967bfc979594b083c36f6a08e49273ef7c9ad7b13aAdam Cohen f /= Math.abs(f); 11977bfc979594b083c36f6a08e49273ef7c9ad7b13aAdam Cohen } 11987bfc979594b083c36f6a08e49273ef7c9ad7b13aAdam Cohen 1199e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen int overScrollAmount = (int) Math.round(OVERSCROLL_DAMP_FACTOR * f * screenSize); 120068d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen if (amount < 0) { 1201ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen mOverScrollX = overScrollAmount; 12028b805b17158886035b38261eb611d8641701ae43Michael Jurka super.scrollTo(0, getScrollY()); 120368d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } else { 1204ebea84d1c95f4c38ba8cee46cd586fd757b4fce2Adam Cohen mOverScrollX = mMaxScrollX + overScrollAmount; 12058b805b17158886035b38261eb611d8641701ae43Michael Jurka super.scrollTo(mMaxScrollX, getScrollY()); 120668d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } 120768d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen invalidate(); 120868d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } 120968d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen 1210b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen protected void overScroll(float amount) { 1211b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen dampedOverScroll(amount); 1212b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen } 1213b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen 1214c5b262ccf639fedac2aff5bb8238342f95396338Michael Jurka protected float maxOverScroll() { 1215c5b262ccf639fedac2aff5bb8238342f95396338Michael Jurka // Using the formula in overScroll, assuming that f = 1.0 (which it should generally not 1216b5ba097015c4794fa822f30b38a60a7070a00097Adam Cohen // exceed). Used to find out how much extra wallpaper we need for the over scroll effect 1217c5b262ccf639fedac2aff5bb8238342f95396338Michael Jurka float f = 1.0f; 1218c5b262ccf639fedac2aff5bb8238342f95396338Michael Jurka f = f / (Math.abs(f)) * (overScrollInfluenceCurve(Math.abs(f))); 1219c5b262ccf639fedac2aff5bb8238342f95396338Michael Jurka return OVERSCROLL_DAMP_FACTOR * f; 1220c5b262ccf639fedac2aff5bb8238342f95396338Michael Jurka } 1221c5b262ccf639fedac2aff5bb8238342f95396338Michael Jurka 1222321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 1223321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public boolean onTouchEvent(MotionEvent ev) { 122445e1d6ec0a213a444d01466c3d4f1ded5508ed63Winson Chung // Skip touch handling if there are no pages to swipe 122545e1d6ec0a213a444d01466c3d4f1ded5508ed63Winson Chung if (getChildCount() <= 0) return super.onTouchEvent(ev); 122645e1d6ec0a213a444d01466c3d4f1ded5508ed63Winson Chung 1227b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka acquireVelocityTrackerAndAddMovement(ev); 1228321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1229321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int action = ev.getAction(); 1230321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1231321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung switch (action & MotionEvent.ACTION_MASK) { 1232321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_DOWN: 1233321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /* 1234321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * If being flinged and user touches, stop the fling. isFinished 1235321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * will be false if being flinged. 1236321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 1237321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (!mScroller.isFinished()) { 1238321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mScroller.abortAnimation(); 1239321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1240321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1241321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // Remember where the motion event started 1242321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mDownMotionX = mLastMotionX = ev.getX(); 1243c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung mLastMotionXRemainder = 0; 1244aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen mTotalMotionX = 0; 1245321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mActivePointerId = ev.getPointerId(0); 12460142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (mTouchState == TOUCH_STATE_SCROLLING) { 12470142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka pageBeginMoving(); 12480142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 1249321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1250321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1251321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_MOVE: 1252321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (mTouchState == TOUCH_STATE_SCROLLING) { 1253321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // Scroll to follow the motion event 1254321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int pointerIndex = ev.findPointerIndex(mActivePointerId); 1255321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final float x = ev.getX(pointerIndex); 1256c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung final float deltaX = mLastMotionX + mLastMotionXRemainder - x; 1257321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1258aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen mTotalMotionX += Math.abs(deltaX); 1259aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen 1260c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung // Only scroll and update mLastMotionX if we have moved some discrete amount. We 1261c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung // keep the remainder because we are actually testing if we've moved from the last 1262c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung // scrolled position (which is discrete). 1263c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung if (Math.abs(deltaX) >= 1.0f) { 126468d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen mTouchX += deltaX; 126568d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 126668d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen if (!mDeferScrollUpdate) { 1267c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung scrollBy((int) deltaX, 0); 1268785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "onTouchEvent().Scrolling: " + deltaX); 126968d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen } else { 127068d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen invalidate(); 1271321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1272c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung mLastMotionX = x; 1273c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung mLastMotionXRemainder = deltaX - (int) deltaX; 1274321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 1275321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung awakenScrollBars(); 1276321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1277564976a46ef02d665aa0e455ad7867746a0b5325Adam Cohen } else { 1278321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung determineScrollingStart(ev); 1279321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1280321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1281321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1282321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_UP: 1283321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (mTouchState == TOUCH_STATE_SCROLLING) { 1284321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int activePointerId = mActivePointerId; 1285321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int pointerIndex = ev.findPointerIndex(activePointerId); 1286321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final float x = ev.getX(pointerIndex); 1287321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final VelocityTracker velocityTracker = mVelocityTracker; 1288321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 1289321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung int velocityX = (int) velocityTracker.getXVelocity(activePointerId); 12909cfd25f16739548111ba8fc6ba8cd83010eccef6Winson Chung final int deltaX = (int) (x - mDownMotionX); 129100481b3ed322b4f36b669201d2287964febda65fAdam Cohen final int pageWidth = getScaledMeasuredWidth(getPageAt(mCurrentPage)); 129200481b3ed322b4f36b669201d2287964febda65fAdam Cohen boolean isSignificantMove = Math.abs(deltaX) > pageWidth * 129300481b3ed322b4f36b669201d2287964febda65fAdam Cohen SIGNIFICANT_MOVE_THRESHOLD; 1294aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen 1295b64cb5a44bedcff0ea4b09cf8f1f5b6f95b0244eAdam Cohen mTotalMotionX += Math.abs(mLastMotionX + mLastMotionXRemainder - x); 1296b64cb5a44bedcff0ea4b09cf8f1f5b6f95b0244eAdam Cohen 129700481b3ed322b4f36b669201d2287964febda65fAdam Cohen boolean isFling = mTotalMotionX > MIN_LENGTH_FOR_FLING && 1298265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen Math.abs(velocityX) > mFlingThresholdVelocity; 129900481b3ed322b4f36b669201d2287964febda65fAdam Cohen 1300aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen // In the case that the page is moved far to one direction and then is flung 1301aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen // in the opposite direction, we use a threshold to determine whether we should 1302aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen // just return to the starting page, or if we should skip one further. 1303aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen boolean returnToOriginalPage = false; 1304b64cb5a44bedcff0ea4b09cf8f1f5b6f95b0244eAdam Cohen if (Math.abs(deltaX) > pageWidth * RETURN_TO_ORIGINAL_PAGE_THRESHOLD && 130500481b3ed322b4f36b669201d2287964febda65fAdam Cohen Math.signum(velocityX) != Math.signum(deltaX) && isFling) { 1306aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen returnToOriginalPage = true; 1307aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen } 1308aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen 1309aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen int finalPage; 1310aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen // We give flings precedence over large moves, which is why we short-circuit our 1311aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen // test for a large move if a fling has been registered. That is, a large 1312aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen // move to the left and fling to the right will register as a fling to the right. 131352aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final boolean isRtl = isLayoutRtl(); 131452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung boolean isDeltaXLeft = isRtl ? deltaX > 0 : deltaX < 0; 131552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung boolean isVelocityXLeft = isRtl ? velocityX > 0 : velocityX < 0; 131652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (((isSignificantMove && !isDeltaXLeft && !isFling) || 131752aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung (isFling && !isVelocityXLeft)) && mCurrentPage > 0) { 1318aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen finalPage = returnToOriginalPage ? mCurrentPage : mCurrentPage - 1; 1319aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen snapToPageWithVelocity(finalPage, velocityX); 132052aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } else if (((isSignificantMove && isDeltaXLeft && !isFling) || 132152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung (isFling && isVelocityXLeft)) && 132286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung mCurrentPage < getChildCount() - 1) { 1323aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen finalPage = returnToOriginalPage ? mCurrentPage : mCurrentPage + 1; 1324aefd4e1f519838852d9e870031a85c9ea55a05f3Adam Cohen snapToPageWithVelocity(finalPage, velocityX); 1325321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 1326321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung snapToDestination(); 1327321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1328d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy } else if (mTouchState == TOUCH_STATE_PREV_PAGE) { 1329321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // at this point we have not moved beyond the touch slop 1330321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // (otherwise mTouchState would be TOUCH_STATE_SCROLLING), so 1331321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // we can just page 133286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung int nextPage = Math.max(0, mCurrentPage - 1); 133386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (nextPage != mCurrentPage) { 133486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung snapToPage(nextPage); 1335321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 1336321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung snapToDestination(); 1337321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1338d0ce1ec2e21ce3bb0ba3549a01d1d06b440a8e45Patrick Dubroy } else if (mTouchState == TOUCH_STATE_NEXT_PAGE) { 1339321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // at this point we have not moved beyond the touch slop 1340321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // (otherwise mTouchState would be TOUCH_STATE_SCROLLING), so 1341321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // we can just page 134286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung int nextPage = Math.min(getChildCount() - 1, mCurrentPage + 1); 134386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (nextPage != mCurrentPage) { 134486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung snapToPage(nextPage); 1345321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 1346321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung snapToDestination(); 1347321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 13481d0867c8de6a889bccde9b7e768daef182a25e5cJeff Brown } else { 1349d771c96e5d156ffde5d35ee13ce053de60dc3163Michael Jurka onUnhandledTap(ev); 1350321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1351321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mTouchState = TOUCH_STATE_REST; 1352321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mActivePointerId = INVALID_POINTER; 1353b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka releaseVelocityTracker(); 1354321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1355321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1356321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_CANCEL: 1357b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka if (mTouchState == TOUCH_STATE_SCROLLING) { 1358b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka snapToDestination(); 1359b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka } 1360321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mTouchState = TOUCH_STATE_REST; 1361321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mActivePointerId = INVALID_POINTER; 1362b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka releaseVelocityTracker(); 1363321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1364321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1365321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung case MotionEvent.ACTION_POINTER_UP: 1366321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung onSecondaryPointerUp(ev); 1367321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung break; 1368321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1369321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1370321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return true; 1371321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1372321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1373185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung @Override 1374185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung public boolean onGenericMotionEvent(MotionEvent event) { 1375185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { 1376185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung switch (event.getAction()) { 1377185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung case MotionEvent.ACTION_SCROLL: { 1378185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung // Handle mouse (or ext. device) by shifting the page depending on the scroll 1379185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung final float vscroll; 1380185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung final float hscroll; 1381185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung if ((event.getMetaState() & KeyEvent.META_SHIFT_ON) != 0) { 1382185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung vscroll = 0; 1383185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung hscroll = event.getAxisValue(MotionEvent.AXIS_VSCROLL); 1384185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } else { 1385185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung vscroll = -event.getAxisValue(MotionEvent.AXIS_VSCROLL); 1386185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung hscroll = event.getAxisValue(MotionEvent.AXIS_HSCROLL); 1387185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } 1388185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung if (hscroll != 0 || vscroll != 0) { 138952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung boolean isForwardScroll = isLayoutRtl() ? (hscroll < 0 || vscroll < 0) 139052aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung : (hscroll > 0 || vscroll > 0); 139152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (isForwardScroll) { 1392185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung scrollRight(); 1393185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } else { 1394185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung scrollLeft(); 1395185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } 1396185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung return true; 1397185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } 1398185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } 1399185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } 1400185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } 1401185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung return super.onGenericMotionEvent(event); 1402185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung } 1403185d71647c8859cae7a375773b31c03f2f22ade1Winson Chung 1404b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka private void acquireVelocityTrackerAndAddMovement(MotionEvent ev) { 1405b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka if (mVelocityTracker == null) { 1406b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka mVelocityTracker = VelocityTracker.obtain(); 1407b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka } 1408b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka mVelocityTracker.addMovement(ev); 1409b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka } 1410b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka 1411b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka private void releaseVelocityTracker() { 1412b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka if (mVelocityTracker != null) { 1413b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka mVelocityTracker.recycle(); 1414b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka mVelocityTracker = null; 1415b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka } 1416b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka } 1417b8f0672d7c4b9836f90c1a7517a9e47fec4c7144Michael Jurka 1418321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung private void onSecondaryPointerUp(MotionEvent ev) { 1419321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 1420321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung MotionEvent.ACTION_POINTER_INDEX_SHIFT; 1421321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int pointerId = ev.getPointerId(pointerIndex); 1422321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (pointerId == mActivePointerId) { 1423321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // This was our active pointer going up. Choose a new 1424321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // active pointer and adjust accordingly. 1425321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung // TODO: Make this decision more intelligent. 1426321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 1427321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mLastMotionX = mDownMotionX = ev.getX(newPointerIndex); 1428321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mLastMotionY = ev.getY(newPointerIndex); 1429c0844aa8a135bbf56aad2f95f57d1354a1260078Winson Chung mLastMotionXRemainder = 0; 1430321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mActivePointerId = ev.getPointerId(newPointerIndex); 1431321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (mVelocityTracker != null) { 1432321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung mVelocityTracker.clear(); 1433321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1434321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 14351d0867c8de6a889bccde9b7e768daef182a25e5cJeff Brown } 14361d0867c8de6a889bccde9b7e768daef182a25e5cJeff Brown 1437d771c96e5d156ffde5d35ee13ce053de60dc3163Michael Jurka protected void onUnhandledTap(MotionEvent ev) {} 1438321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1439321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 1440321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void requestChildFocus(View child, View focused) { 1441321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung super.requestChildFocus(child, focused); 1442ae4f155e090bf387b989fb738ee34ab045585711Adam Cohen int page = indexToPage(indexOfChild(child)); 144397d85d23b013347bead4e2f5fa430a79ce69431eWinson Chung if (page >= 0 && page != getCurrentPage() && !isInTouchMode()) { 144486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung snapToPage(page); 1445321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1446321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1447321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1448e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung protected int getChildIndexForRelativeOffset(int relativeOffset) { 144952aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final boolean isRtl = isLayoutRtl(); 1450e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung final int childCount = getChildCount(); 14519c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen int left; 14529c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen int right; 145352aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int startIndex = isRtl ? childCount - 1 : 0; 145452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int endIndex = isRtl ? -1 : childCount; 145552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final int delta = isRtl ? -1 : 1; 145652aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung for (int i = startIndex; i != endIndex; i += delta) { 14579c4949e12c909d5e01d24386147b1c528015b31bAdam Cohen left = getRelativeChildOffset(i); 145822f823d340710bcde587b18a1542570cbe0360f5Adam Cohen right = (left + getScaledMeasuredWidth(getPageAt(i))); 1459e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung if (left <= relativeOffset && relativeOffset <= right) { 1460e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung return i; 1461e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung } 1462e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung } 1463e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung return -1; 1464e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung } 1465e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung 14661908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung protected int getChildWidth(int index) { 146763257c110a4ee54d5e8872c471cce254cf613c7aWinson Chung // This functions are called enough times that it actually makes a difference in the 146863257c110a4ee54d5e8872c471cce254cf613c7aWinson Chung // profiler -- so just inline the max() here 146922f823d340710bcde587b18a1542570cbe0360f5Adam Cohen final int measuredWidth = getPageAt(index).getMeasuredWidth(); 147063257c110a4ee54d5e8872c471cce254cf613c7aWinson Chung final int minWidth = mMinimumWidth; 147163257c110a4ee54d5e8872c471cce254cf613c7aWinson Chung return (minWidth > measuredWidth) ? minWidth : measuredWidth; 14721908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung } 14731908d07151e0d3f82899f368874e41ed1e49ba16Winson Chung 1474d19d3ca3ec22aeec48b8e555e9764b98ff8cae5fAdam Cohen int getPageNearestToCenterOfScreen() { 147522f823d340710bcde587b18a1542570cbe0360f5Adam Cohen int minDistanceFromScreenCenter = Integer.MAX_VALUE; 1476321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung int minDistanceFromScreenCenterIndex = -1; 14778b805b17158886035b38261eb611d8641701ae43Michael Jurka int screenCenter = getScrollX() + (getMeasuredWidth() / 2); 1478321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int childCount = getChildCount(); 1479321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung for (int i = 0; i < childCount; ++i) { 148022f823d340710bcde587b18a1542570cbe0360f5Adam Cohen View layout = (View) getPageAt(i); 1481d3ef3065ab0941567c45e9aec98783138b623c68Michael Jurka int childWidth = getScaledMeasuredWidth(layout); 1482321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung int halfChildWidth = (childWidth / 2); 1483321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung int childCenter = getChildOffset(i) + halfChildWidth; 1484321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung int distanceFromScreenCenter = Math.abs(childCenter - screenCenter); 1485321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (distanceFromScreenCenter < minDistanceFromScreenCenter) { 1486321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung minDistanceFromScreenCenter = distanceFromScreenCenter; 1487321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung minDistanceFromScreenCenterIndex = i; 1488321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1489321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1490d19d3ca3ec22aeec48b8e555e9764b98ff8cae5fAdam Cohen return minDistanceFromScreenCenterIndex; 1491d19d3ca3ec22aeec48b8e555e9764b98ff8cae5fAdam Cohen } 1492d19d3ca3ec22aeec48b8e555e9764b98ff8cae5fAdam Cohen 1493d19d3ca3ec22aeec48b8e555e9764b98ff8cae5fAdam Cohen protected void snapToDestination() { 1494d19d3ca3ec22aeec48b8e555e9764b98ff8cae5fAdam Cohen snapToPage(getPageNearestToCenterOfScreen(), PAGE_SNAP_ANIMATION_DURATION); 1495321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1496321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1497e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen private static class ScrollInterpolator implements Interpolator { 1498e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen public ScrollInterpolator() { 1499e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen } 1500e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1501e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen public float getInterpolation(float t) { 1502e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen t -= 1.0f; 1503e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen return t*t*t*t*t + 1; 1504e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen } 1505e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen } 1506e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1507e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // We want the duration of the page snap animation to be influenced by the distance that 1508e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // the screen has to travel, however, we don't want this duration to be effected in a 1509e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // purely linear fashion. Instead, we use this method to moderate the effect that the distance 1510e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // of travel has on the overall snap duration. 1511e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen float distanceInfluenceForSnapDuration(float f) { 1512e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen f -= 0.5f; // center the values about 0. 1513e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen f *= 0.3f * Math.PI / 2.0f; 1514e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen return (float) Math.sin(f); 1515e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen } 1516e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 15170142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected void snapToPageWithVelocity(int whichPage, int velocity) { 1518e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen whichPage = Math.max(0, Math.min(whichPage, getChildCount() - 1)); 1519e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen int halfScreenSize = getMeasuredWidth() / 2; 1520e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1521785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "snapToPage.getChildOffset(): " + getChildOffset(whichPage)); 1522785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "snapToPageWithVelocity.getRelativeChildOffset(): " 1523785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung + getMeasuredWidth() + ", " + getChildWidth(whichPage)); 1524e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen final int newX = getChildOffset(whichPage) - getRelativeChildOffset(whichPage); 1525e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen int delta = newX - mUnboundedScrollX; 1526e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen int duration = 0; 1527e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1528265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen if (Math.abs(velocity) < mMinFlingVelocity) { 1529e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // If the velocity is low enough, then treat this more as an automatic page advance 1530e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // as opposed to an apparent physical response to flinging 1531e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen snapToPage(whichPage, PAGE_SNAP_ANIMATION_DURATION); 1532e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen return; 1533e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen } 1534e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1535e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // Here we compute a "distance" that will be used in the computation of the overall 1536e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // snap duration. This is a function of the actual distance that needs to be traveled; 1537e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // we keep this value close to half screen size in order to reduce the variance in snap 1538e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // duration as a function of the distance the page needs to travel. 153920b7ca91b277e9668b6d4b4b3c9116b6778d22a5Michael Jurka float distanceRatio = Math.min(1f, 1.0f * Math.abs(delta) / (2 * halfScreenSize)); 1540e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen float distance = halfScreenSize + halfScreenSize * 1541e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen distanceInfluenceForSnapDuration(distanceRatio); 1542e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1543e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen velocity = Math.abs(velocity); 1544265b9a66542148e0ff13971001cb9461065e1e0eAdam Cohen velocity = Math.max(mMinSnapVelocity, velocity); 1545e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1546e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // we want the page's snap velocity to approximately match the velocity at which the 1547e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen // user flings, so we scale the duration by a value near to the derivative of the scroll 154820b7ca91b277e9668b6d4b4b3c9116b6778d22a5Michael Jurka // interpolator at zero, ie. 5. We use 4 to make it a little slower. 154920b7ca91b277e9668b6d4b4b3c9116b6778d22a5Michael Jurka duration = 4 * Math.round(1000 * Math.abs(distance / velocity)); 155097687ef66b209d39d6bc20aeb1496774b66fddd1Chet Haase duration = Math.min(duration, MAX_PAGE_SNAP_DURATION); 1551e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen 1552e0f66b546994a9bdee452851c17a148db02ec300Adam Cohen snapToPage(whichPage, delta, duration); 15530142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 15540142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 15550142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected void snapToPage(int whichPage) { 15565f2aa4efeeb8b0133d891715d71553138d9f9ca7Winson Chung snapToPage(whichPage, PAGE_SNAP_ANIMATION_DURATION); 1557321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1558321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 15590142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected void snapToPage(int whichPage, int duration) { 156086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung whichPage = Math.max(0, Math.min(whichPage, getPageCount() - 1)); 1561321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1562785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "snapToPage.getChildOffset(): " + getChildOffset(whichPage)); 1563785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "snapToPage.getRelativeChildOffset(): " + getMeasuredWidth() + ", " 1564785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung + getChildWidth(whichPage)); 156586f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung int newX = getChildOffset(whichPage) - getRelativeChildOffset(whichPage); 156668d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen final int sX = mUnboundedScrollX; 1567321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung final int delta = newX - sX; 15680142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka snapToPage(whichPage, delta, duration); 15690142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 15700142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 15710142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka protected void snapToPage(int whichPage, int delta, int duration) { 15720142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mNextPage = whichPage; 15730142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 15740142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka View focusedChild = getFocusedChild(); 15750142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (focusedChild != null && whichPage != mCurrentPage && 157622f823d340710bcde587b18a1542570cbe0360f5Adam Cohen focusedChild == getPageAt(mCurrentPage)) { 15770142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka focusedChild.clearFocus(); 15780142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 15790142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 15800142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka pageBeginMoving(); 1581321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung awakenScrollBars(duration); 1582321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (duration == 0) { 1583321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung duration = Math.abs(delta); 1584321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1585321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1586321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (!mScroller.isFinished()) mScroller.abortAnimation(); 158768d739365bf650fe7fecf99cd3bfe63a0d41bd12Adam Cohen mScroller.startScroll(mUnboundedScrollX, 0, delta, 0, duration); 158880baf5a6b3c62a62265f626d43d1167783c94131Winson Chung 1589b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung // Load associated pages immediately if someone else is handling the scroll, otherwise defer 1590b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung // loading associated pages until the scroll settles 1591b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung if (mDeferScrollUpdate) { 1592b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung loadAssociatedPages(mNextPage); 1593b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung } else { 15944e076545e4ccdbd3c045a3fa33869a2b7519a0ccWinson Chung mDeferLoadAssociatedPagesUntilScrollCompletes = true; 1595b44b52439d155f570db7d6d0b80fdd3350e35685Winson Chung } 15960142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka notifyPageSwitchListener(); 1597321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung invalidate(); 1598321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1599321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1600321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void scrollLeft() { 1601321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (mScroller.isFinished()) { 160286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mCurrentPage > 0) snapToPage(mCurrentPage - 1); 1603321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 160486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mNextPage > 0) snapToPage(mNextPage - 1); 1605321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1606321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1607321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1608321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void scrollRight() { 1609321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (mScroller.isFinished()) { 161086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mCurrentPage < getChildCount() -1) snapToPage(mCurrentPage + 1); 1611321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } else { 161286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung if (mNextPage < getChildCount() -1) snapToPage(mNextPage + 1); 1613321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1614321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1615321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 161686f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung public int getPageForView(View v) { 1617321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung int result = -1; 1618321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung if (v != null) { 1619321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung ViewParent vp = v.getParent(); 1620321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung int count = getChildCount(); 1621321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung for (int i = 0; i < count; i++) { 162222f823d340710bcde587b18a1542570cbe0360f5Adam Cohen if (vp == getPageAt(i)) { 1623321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return i; 1624321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1625321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1626321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1627321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return result; 1628321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1629321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1630321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung /** 1631321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung * @return True is long presses are still allowed for the current touch 1632321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung */ 1633321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public boolean allowLongPress() { 1634321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return mAllowLongPress; 1635321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1636321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 16370142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka /** 16380142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka * Set true to allow long-press events to be triggered, usually checked by 16390142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka * {@link Launcher} to accept or block dpad-initiated long-presses. 16400142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka */ 16410142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka public void setAllowLongPress(boolean allowLongPress) { 16420142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mAllowLongPress = allowLongPress; 16430142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 16440142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka 1645321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public static class SavedState extends BaseSavedState { 164686f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung int currentPage = -1; 1647321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1648321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung SavedState(Parcelable superState) { 1649321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung super(superState); 1650321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1651321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1652321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung private SavedState(Parcel in) { 1653321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung super(in); 165486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung currentPage = in.readInt(); 1655321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1656321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1657321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung @Override 1658321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public void writeToParcel(Parcel out, int flags) { 1659321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung super.writeToParcel(out, flags); 166086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung out.writeInt(currentPage); 1661321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1662321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1663321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public static final Parcelable.Creator<SavedState> CREATOR = 1664321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung new Parcelable.Creator<SavedState>() { 1665321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public SavedState createFromParcel(Parcel in) { 1666321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return new SavedState(in); 1667321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1668321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1669321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public SavedState[] newArray(int size) { 1670321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung return new SavedState[size]; 1671321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1672321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung }; 1673321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1674321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung 1675f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung protected void loadAssociatedPages(int page) { 1676f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung loadAssociatedPages(page, false); 1677f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung } 1678f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung protected void loadAssociatedPages(int page, boolean immediateAndOnly) { 16790142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (mContentIsRefreshable) { 16800142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka final int count = getChildCount(); 16810142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (page < count) { 1682e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung int lowerPageBound = getAssociatedLowerPageBound(page); 1683e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung int upperPageBound = getAssociatedUpperPageBound(page); 1684785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung if (DEBUG) Log.d(TAG, "loadAssociatedPages: " + lowerPageBound + "/" 1685785d2eb2b8d7072c8124300dd9168ff51a91cf38Winson Chung + upperPageBound); 16860cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka // First, clear any pages that should no longer be loaded 16870cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka for (int i = 0; i < count; ++i) { 16880cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka Page layout = (Page) getPageAt(i); 16892a4b1a809c6bc0af9ae3ad974fe50e2a91569543Michael Jurka if ((i < lowerPageBound) || (i > upperPageBound)) { 16900cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka if (layout.getPageChildCount() > 0) { 16910cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka layout.removeAllViewsOnPage(); 16920cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka } 16930cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka mDirtyPageContent.set(i, true); 16940cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka } 16950cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka } 16960cad1116add5303d7c06cc21182527cebc42aff6Michael Jurka // Next, load any new pages 16970142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka for (int i = 0; i < count; ++i) { 1698f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung if ((i != page) && immediateAndOnly) { 1699f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung continue; 1700f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung } 17010142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (lowerPageBound <= i && i <= upperPageBound) { 17020142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (mDirtyPageContent.get(i)) { 1703f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung syncPageItems(i, (i == page) && immediateAndOnly); 17040142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mDirtyPageContent.set(i, false); 17050142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 170680baf5a6b3c62a62265f626d43d1167783c94131Winson Chung } 170780baf5a6b3c62a62265f626d43d1167783c94131Winson Chung } 170880baf5a6b3c62a62265f626d43d1167783c94131Winson Chung } 170980baf5a6b3c62a62265f626d43d1167783c94131Winson Chung } 171080baf5a6b3c62a62265f626d43d1167783c94131Winson Chung } 171180baf5a6b3c62a62265f626d43d1167783c94131Winson Chung 1712e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung protected int getAssociatedLowerPageBound(int page) { 1713e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung return Math.max(0, page - 1); 1714e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung } 1715e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung protected int getAssociatedUpperPageBound(int page) { 1716e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung final int count = getChildCount(); 1717e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung return Math.min(page + 1, count - 1); 1718e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung } 1719e3193b93ad7bf33e2e45319084a99b9fc986622bWinson Chung 172086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung /** 172186f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * This method is called ONLY to synchronize the number of pages that the paged view has. 172286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * To actually fill the pages with information, implement syncPageItems() below. It is 172386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * guaranteed that syncPageItems() will be called for a particular page before it is shown, 172486f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * and therefore, individual page items do not need to be updated in this method. 172586f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung */ 1726321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung public abstract void syncPages(); 172786f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung 172886f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung /** 172986f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * This method is called to synchronize the items that are on a particular page. If views on 173086f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung * the page can be reused, then they should be updated within this method. 173186f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung */ 1732f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung public abstract void syncPageItems(int page, boolean immediate); 173386f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung 1734244d74cb353f1260c4d633e719bf84bb3b6e52bcPatrick Dubroy protected void invalidatePageData() { 1735f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung invalidatePageData(-1, false); 17365a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung } 17375a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung protected void invalidatePageData(int currentPage) { 1738f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung invalidatePageData(currentPage, false); 1739f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung } 1740f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung protected void invalidatePageData(int currentPage, boolean immediateAndOnly) { 1741f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung if (!mIsDataReady) { 1742f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung return; 1743f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung } 1744f0ea4d3378be7b962c8e0bce2392df5e82491fb8Winson Chung 17450142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka if (mContentIsRefreshable) { 17460cd3b64e607cc1f81ed49b00ef7398c2a2b7a48dAdam Cohen // Force all scrolling-related behavior to end 17470cd3b64e607cc1f81ed49b00ef7398c2a2b7a48dAdam Cohen mScroller.forceFinished(true); 17480cd3b64e607cc1f81ed49b00ef7398c2a2b7a48dAdam Cohen mNextPage = INVALID_PAGE; 17490cd3b64e607cc1f81ed49b00ef7398c2a2b7a48dAdam Cohen 17500142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // Update all the pages 17510142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka syncPages(); 175286f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung 17535a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung // We must force a measure after we've loaded the pages to update the content width and 17545a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung // to determine the full scroll width 17555a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung measure(MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.EXACTLY), 17565a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.EXACTLY)); 17575a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung 17585a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung // Set a new page as the current page if necessary 17595a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung if (currentPage > -1) { 17605afbf7bdd6f6879124c9b8283e005fe57f310d02Winson Chung setCurrentPage(Math.min(getPageCount() - 1, currentPage)); 17615a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung } 17625a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung 17630142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // Mark each of the pages as dirty 17640142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka final int count = getChildCount(); 17650142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mDirtyPageContent.clear(); 17660142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka for (int i = 0; i < count; ++i) { 17670142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka mDirtyPageContent.add(true); 17680142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 176986f7753bbd6d87ce85195b0715e5548edbfdb7d1Winson Chung 17700142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka // Load any pages that are necessary for the current window of views 1771f314b0eab03bb354c14b6c89f694a6685bd246d9Winson Chung loadAssociatedPages(mCurrentPage, immediateAndOnly); 17720142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka requestLayout(); 17730142d49e1378a7155bcca1fb59965d9e73016dbcMichael Jurka } 1774321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung } 1775007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 1776afaa05014e0bf3ed1192f9ddec2af4283bc50248Michael Jurka protected View getScrollingIndicator() { 1777007c69867d821ea2b271398577a8b3440b3a7046Winson Chung // We use mHasScrollIndicator to prevent future lookups if there is no sibling indicator 1778007c69867d821ea2b271398577a8b3440b3a7046Winson Chung // found 1779007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (mHasScrollIndicator && mScrollIndicator == null) { 1780007c69867d821ea2b271398577a8b3440b3a7046Winson Chung ViewGroup parent = (ViewGroup) getParent(); 1781a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung if (parent != null) { 1782a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung mScrollIndicator = (View) (parent.findViewById(R.id.paged_view_indicator)); 1783a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung mHasScrollIndicator = mScrollIndicator != null; 1784a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung if (mHasScrollIndicator) { 1785a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung mScrollIndicator.setVisibility(View.VISIBLE); 1786a128a7b9e5f00559ad6a443f7be8e8d7591942a3Winson Chung } 1787007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1788007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1789007c69867d821ea2b271398577a8b3440b3a7046Winson Chung return mScrollIndicator; 1790007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1791007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 1792007c69867d821ea2b271398577a8b3440b3a7046Winson Chung protected boolean isScrollingIndicatorEnabled() { 1793b1dfe25ae1fffafb5e4ac22c21fd60d6b1b713cfMichael Jurka return true; 1794007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1795007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 17965a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung Runnable hideScrollingIndicatorRunnable = new Runnable() { 17975a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung @Override 17985a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung public void run() { 17995a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung hideScrollingIndicator(false); 18005a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung } 18015a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung }; 1802b737ee6ab2dc4938a1b2a574c336af0eab826712Michael Jurka protected void flashScrollingIndicator(boolean animated) { 18035a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung removeCallbacks(hideScrollingIndicatorRunnable); 1804b737ee6ab2dc4938a1b2a574c336af0eab826712Michael Jurka showScrollingIndicator(!animated); 18055a808358f1a773dab8babae44899ffd4ed1810c1Winson Chung postDelayed(hideScrollingIndicatorRunnable, sScrollIndicatorFlashDuration); 18063ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung } 18073ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung 1808430e8a5f5b06181addfd37223518fc21c5c41b69Michael Jurka protected void showScrollingIndicator(boolean immediately) { 1809bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka mShouldShowScrollIndicator = true; 1810bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka mShouldShowScrollIndicatorImmediately = true; 1811007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (getChildCount() <= 1) return; 1812007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (!isScrollingIndicatorEnabled()) return; 1813007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 1814bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka mShouldShowScrollIndicator = false; 1815007c69867d821ea2b271398577a8b3440b3a7046Winson Chung getScrollingIndicator(); 1816007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (mScrollIndicator != null) { 1817007c69867d821ea2b271398577a8b3440b3a7046Winson Chung // Fade the indicator in 1818007c69867d821ea2b271398577a8b3440b3a7046Winson Chung updateScrollingIndicatorPosition(); 181932174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicator.setVisibility(View.VISIBLE); 182021b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen cancelScrollingIndicatorAnimations(); 1821bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase if (immediately || mScrollingPaused) { 1822430e8a5f5b06181addfd37223518fc21c5c41b69Michael Jurka mScrollIndicator.setAlpha(1f); 1823430e8a5f5b06181addfd37223518fc21c5c41b69Michael Jurka } else { 18242ecf995e0d2d55eb71d03f7230ca87270872d1a3Michael Jurka mScrollIndicatorAnimator = LauncherAnimUtils.ofFloat(mScrollIndicator, "alpha", 1f); 1825430e8a5f5b06181addfd37223518fc21c5c41b69Michael Jurka mScrollIndicatorAnimator.setDuration(sScrollIndicatorFadeInDuration); 1826430e8a5f5b06181addfd37223518fc21c5c41b69Michael Jurka mScrollIndicatorAnimator.start(); 1827430e8a5f5b06181addfd37223518fc21c5c41b69Michael Jurka } 1828007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1829007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1830007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 183121b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen protected void cancelScrollingIndicatorAnimations() { 183221b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen if (mScrollIndicatorAnimator != null) { 183321b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen mScrollIndicatorAnimator.cancel(); 183421b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen } 183521b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen } 183621b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen 1837007c69867d821ea2b271398577a8b3440b3a7046Winson Chung protected void hideScrollingIndicator(boolean immediately) { 1838007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (getChildCount() <= 1) return; 1839007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (!isScrollingIndicatorEnabled()) return; 1840007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 1841007c69867d821ea2b271398577a8b3440b3a7046Winson Chung getScrollingIndicator(); 1842007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (mScrollIndicator != null) { 1843007c69867d821ea2b271398577a8b3440b3a7046Winson Chung // Fade the indicator out 1844007c69867d821ea2b271398577a8b3440b3a7046Winson Chung updateScrollingIndicatorPosition(); 184521b411074e39fd10cbc8dd0220bb159da4af2c76Adam Cohen cancelScrollingIndicatorAnimations(); 1846bc2f082dac475eff7fc0e40f90eb6c0552511170Chet Haase if (immediately || mScrollingPaused) { 184781efbad05e0ce69b06d7323749ef2e200b84b98eMichael Jurka mScrollIndicator.setVisibility(View.INVISIBLE); 184832174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicator.setAlpha(0f); 184932174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } else { 18502ecf995e0d2d55eb71d03f7230ca87270872d1a3Michael Jurka mScrollIndicatorAnimator = LauncherAnimUtils.ofFloat(mScrollIndicator, "alpha", 0f); 185132174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicatorAnimator.setDuration(sScrollIndicatorFadeOutDuration); 185232174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicatorAnimator.addListener(new AnimatorListenerAdapter() { 185332174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung private boolean cancelled = false; 185432174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung @Override 185532174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung public void onAnimationCancel(android.animation.Animator animation) { 185632174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung cancelled = true; 185732174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } 185832174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung @Override 185932174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung public void onAnimationEnd(Animator animation) { 186032174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung if (!cancelled) { 186181efbad05e0ce69b06d7323749ef2e200b84b98eMichael Jurka mScrollIndicator.setVisibility(View.INVISIBLE); 186232174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } 186332174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } 186432174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung }); 186532174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicatorAnimator.start(); 186632174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } 1867007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1868007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1869007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 187032174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung /** 187132174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung * To be overridden by subclasses to determine whether the scroll indicator should stretch to 187232174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung * fill its space on the track or not. 187332174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung */ 187432174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung protected boolean hasElasticScrollIndicator() { 1875dea74b7d12b0fcd50bfdb4274f9867ba76d75238Winson Chung return true; 187632174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } 187732174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung 1878007c69867d821ea2b271398577a8b3440b3a7046Winson Chung private void updateScrollingIndicator() { 1879007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (getChildCount() <= 1) return; 1880007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (!isScrollingIndicatorEnabled()) return; 1881007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 1882007c69867d821ea2b271398577a8b3440b3a7046Winson Chung getScrollingIndicator(); 1883007c69867d821ea2b271398577a8b3440b3a7046Winson Chung if (mScrollIndicator != null) { 1884007c69867d821ea2b271398577a8b3440b3a7046Winson Chung updateScrollingIndicatorPosition(); 1885007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1886bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka if (mShouldShowScrollIndicator) { 1887bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka showScrollingIndicator(mShouldShowScrollIndicatorImmediately); 1888bed61d22bdbfcdbe04f92675c7751b83c7a8947cMichael Jurka } 1889007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 1890007c69867d821ea2b271398577a8b3440b3a7046Winson Chung 1891007c69867d821ea2b271398577a8b3440b3a7046Winson Chung private void updateScrollingIndicatorPosition() { 189252aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung final boolean isRtl = isLayoutRtl(); 1893649723cfb3d73af16dd02462725700897ca60e38Winson Chung if (!isScrollingIndicatorEnabled()) return; 1894430e8a5f5b06181addfd37223518fc21c5c41b69Michael Jurka if (mScrollIndicator == null) return; 189532174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung int numPages = getChildCount(); 189632174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung int pageWidth = getMeasuredWidth(); 1897f5f8cefb215fad98ae6d4487852e8b948aba3619Winson Chung int trackWidth = pageWidth - mScrollIndicatorPaddingLeft - mScrollIndicatorPaddingRight; 189832174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung int indicatorWidth = mScrollIndicator.getMeasuredWidth() - 189932174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicator.getPaddingLeft() - mScrollIndicator.getPaddingRight(); 190032174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung 190152aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung float scrollPos = isRtl ? mMaxScrollX - getScrollX() : getScrollX(); 190252aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung float offset = Math.max(0f, Math.min(1f, (float) scrollPos / mMaxScrollX)); 190352aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung if (isRtl) { 190452aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung offset = 1f - offset; 190552aee60edcfe5a16e16523c1a4241ac4d8b3672dWinson Chung } 190632174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung int indicatorSpace = trackWidth / numPages; 1907ae890b85dfbcdef592f4a97cca819922a07a83caWinson Chung int indicatorPos = (int) (offset * (trackWidth - indicatorSpace)) + mScrollIndicatorPaddingLeft; 190832174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung if (hasElasticScrollIndicator()) { 190932174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung if (mScrollIndicator.getMeasuredWidth() != indicatorSpace) { 191032174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicator.getLayoutParams().width = indicatorSpace; 191132174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung mScrollIndicator.requestLayout(); 191232174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } 191332174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } else { 191432174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung int indicatorCenterOffset = indicatorSpace / 2 - indicatorWidth / 2; 191532174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung indicatorPos += indicatorCenterOffset; 191632174c878c77b4e0f13449f4c26ff6b487bc7ca6Winson Chung } 1917007c69867d821ea2b271398577a8b3440b3a7046Winson Chung mScrollIndicator.setTranslationX(indicatorPos); 19183ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung } 19193ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung 19203ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung public void showScrollIndicatorTrack() { 19213ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung } 19223ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung 19233ac74c55cf8baef29db80e8c67ab4ab033b04417Winson Chung public void hideScrollIndicatorTrack() { 1924007c69867d821ea2b271398577a8b3440b3a7046Winson Chung } 19256a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung 19266a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung /* Accessibility */ 19276a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung @Override 19286a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 19296a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung super.onInitializeAccessibilityNodeInfo(info); 193008055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov info.setScrollable(getPageCount() > 1); 193108055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov if (getCurrentPage() < getPageCount() - 1) { 193208055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD); 193308055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } 193408055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov if (getCurrentPage() > 0) { 193508055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD); 193608055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } 19376a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung } 19386a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung 19396a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung @Override 19406a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 19416a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung super.onInitializeAccessibilityEvent(event); 19426a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung event.setScrollable(true); 19436a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_SCROLLED) { 19446a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung event.setFromIndex(mCurrentPage); 19456a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung event.setToIndex(mCurrentPage); 19466a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung event.setItemCount(getChildCount()); 19476a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung } 19486a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung } 19496a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung 195008055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov @Override 195108055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov public boolean performAccessibilityAction(int action, Bundle arguments) { 195208055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov if (super.performAccessibilityAction(action, arguments)) { 195308055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov return true; 195408055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } 195508055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov switch (action) { 195608055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: { 195708055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov if (getCurrentPage() < getPageCount() - 1) { 195808055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov scrollRight(); 195908055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov return true; 196008055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } 196108055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } break; 196208055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: { 196308055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov if (getCurrentPage() > 0) { 196408055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov scrollLeft(); 196508055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov return true; 196608055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } 196708055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } break; 196808055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } 196908055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov return false; 197008055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov } 197108055f66528330ff1a1d1d13c856647d86dd967dSvetoslav Ganov 19726a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung protected String getCurrentPageDescription() { 19738b805b17158886035b38261eb611d8641701ae43Michael Jurka return String.format(getContext().getString(R.string.default_scroll_format), 1974360e63fd3e77247002b86da2a77bd8dfe8c8a807Winson Chung getNextPage() + 1, getChildCount()); 19756a0f57dfafced837a2a282d8feec28d5418be3b9Winson Chung } 1976d11265e3738d93df3d8f76732e027f4d9be2a0abWinson Chung 1977d11265e3738d93df3d8f76732e027f4d9be2a0abWinson Chung @Override 1978d11265e3738d93df3d8f76732e027f4d9be2a0abWinson Chung public boolean onHoverEvent(android.view.MotionEvent event) { 1979d11265e3738d93df3d8f76732e027f4d9be2a0abWinson Chung return true; 1980d11265e3738d93df3d8f76732e027f4d9be2a0abWinson Chung } 1981321e9ee68848d9e782fd557f69cc070308ffbc9cWinson Chung} 1982