SlotView.java revision bc2154199aee16762e3758ad0cfed685323d9a9f
1f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin/* 2f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Copyright (C) 2010 The Android Open Source Project 3f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 4f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Licensed under the Apache License, Version 2.0 (the "License"); 5f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * you may not use this file except in compliance with the License. 6f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * You may obtain a copy of the License at 7f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 8f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * http://www.apache.org/licenses/LICENSE-2.0 9f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * 10f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * Unless required by applicable law or agreed to in writing, software 11f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * distributed under the License is distributed on an "AS IS" BASIS, 12f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * See the License for the specific language governing permissions and 14f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin * limitations under the License. 15f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin */ 16f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 17f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linpackage com.android.gallery3d.ui; 18f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 19f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.anim.Animation; 20f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.common.Utils; 21f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.ui.PositionRepository.Position; 22f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport com.android.gallery3d.util.LinkedNode; 23f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 24f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.content.Context; 25f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.graphics.Rect; 26f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.view.GestureDetector; 27f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.view.MotionEvent; 28f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.view.animation.DecelerateInterpolator; 29f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 30f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.ArrayList; 31f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.HashMap; 32f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 33f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linpublic class SlotView extends GLView { 34f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @SuppressWarnings("unused") 35f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final String TAG = "SlotView"; 36f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 37f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final boolean WIDE = true; 38f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 39f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static final int INDEX_NONE = -1; 40f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 41f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public interface Listener { 42bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang public void onDown(int index); 43bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang public void onUp(); 44f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onSingleTapUp(int index); 45f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onLongTap(int index); 46f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onScrollPositionChanged(int position, int total); 47f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 48f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 49f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static class SimpleListener implements Listener { 50bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang public void onDown(int index) {} 51bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang public void onUp() {} 52f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onSingleTapUp(int index) {} 53f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onLongTap(int index) {} 54f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onScrollPositionChanged(int position, int total) {} 55f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 56f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 57f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final GestureDetector mGestureDetector; 58f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final ScrollerHelper mScroller; 59f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final Paper mPaper = new Paper(); 60f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 61f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private Listener mListener; 62f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private UserInteractionListener mUIListener; 63f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 64f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // Use linked hash map to keep the rendering order 65f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private HashMap<DisplayItem, ItemEntry> mItems = 66f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin new HashMap<DisplayItem, ItemEntry>(); 67f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 68f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public LinkedNode.List<ItemEntry> mItemList = LinkedNode.newList(); 69f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 70f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // This is used for multipass rendering 71f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private ArrayList<ItemEntry> mCurrentItems = new ArrayList<ItemEntry>(); 72f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private ArrayList<ItemEntry> mNextItems = new ArrayList<ItemEntry>(); 73f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 74f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private boolean mMoreAnimation = false; 75f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private MyAnimation mAnimation = null; 76f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final Position mTempPosition = new Position(); 77f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private final Layout mLayout = new Layout(); 78f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private PositionProvider mPositions; 79f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mStartIndex = INDEX_NONE; 80f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 81f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // whether the down action happened while the view is scrolling. 82f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private boolean mDownInScrolling; 83f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mOverscrollEffect = OVERSCROLL_3D; 84f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 85f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static final int OVERSCROLL_3D = 0; 86f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static final int OVERSCROLL_SYSTEM = 1; 87f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static final int OVERSCROLL_NONE = 2; 88f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 89f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public SlotView(Context context) { 90f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mGestureDetector = 91f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin new GestureDetector(context, new MyGestureListener()); 92f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScroller = new ScrollerHelper(context); 93f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 94f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 95f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setCenterIndex(int index) { 96f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int slotCount = mLayout.mSlotCount; 97f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (index < 0 || index >= slotCount) { 98f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return; 99f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 100f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Rect rect = mLayout.getSlotRect(index); 101f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int position = WIDE 102f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ? (rect.left + rect.right - getWidth()) / 2 103f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin : (rect.top + rect.bottom - getHeight()) / 2; 104f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setScrollPosition(position); 105f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 106f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 107f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void makeSlotVisible(int index) { 108f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Rect rect = mLayout.getSlotRect(index); 109f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int visibleBegin = WIDE ? mScrollX : mScrollY; 110f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int visibleLength = WIDE ? getWidth() : getHeight(); 111f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int visibleEnd = visibleBegin + visibleLength; 112f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int slotBegin = WIDE ? rect.left : rect.top; 113f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int slotEnd = WIDE ? rect.right : rect.bottom; 114f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 115f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int position = visibleBegin; 116f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (visibleLength < slotEnd - slotBegin) { 117f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position = visibleBegin; 118f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else if (slotBegin < visibleBegin) { 119f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position = slotBegin; 120f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else if (slotEnd > visibleEnd) { 121f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position = slotEnd - visibleLength; 122f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 123f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 124f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setScrollPosition(position); 125f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 126f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 127f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setScrollPosition(int position) { 128f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position = Utils.clamp(position, 0, mLayout.getScrollLimit()); 129f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScroller.setPosition(position); 130f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateScrollPosition(position, false); 131f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 132f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 1339201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public void setSlotSpec(Spec spec) { 1349201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mLayout.setSlotSpec(spec); 135f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 136f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 137f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 138f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void addComponent(GLView view) { 139f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin throw new UnsupportedOperationException(); 140f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 141f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 142f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 143f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean removeComponent(GLView view) { 144f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin throw new UnsupportedOperationException(); 145f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 146f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 147f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 148f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected void onLayout(boolean changeSize, int l, int t, int r, int b) { 149f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (!changeSize) return; 150f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mLayout.setSize(r - l, b - t); 151f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin onLayoutChanged(r - l, b - t); 152f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mOverscrollEffect == OVERSCROLL_3D) { 153f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mPaper.setSize(r - l, b - t); 154f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 155f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 156f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 157f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected void onLayoutChanged(int width, int height) { 158f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 159f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 160f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void startTransition(PositionProvider position) { 161f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mPositions = position; 162f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mAnimation = new MyAnimation(); 163f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mAnimation.start(); 164f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mItems.size() != 0) invalidate(); 165f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 166f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 167f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void savePositions(PositionRepository repository) { 168f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin repository.clear(); 169f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin LinkedNode.List<ItemEntry> list = mItemList; 170f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ItemEntry entry = list.getFirst(); 171f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Position position = new Position(); 172f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin while (entry != null) { 173f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position.set(entry.target); 174f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position.x -= mScrollX; 175f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position.y -= mScrollY; 176f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin repository.putPosition(entry.item.getIdentity(), position); 177f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin entry = list.nextOf(entry); 178f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 179f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 180f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 181f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void updateScrollPosition(int position, boolean force) { 182f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (!force && (WIDE ? position == mScrollX : position == mScrollY)) return; 183f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (WIDE) { 184f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScrollX = position; 185f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 186f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScrollY = position; 187f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 188f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mLayout.setScrollPosition(position); 189f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin onScrollPositionChanged(position); 190f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 191f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 192f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected void onScrollPositionChanged(int newPosition) { 193f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int limit = mLayout.getScrollLimit(); 194f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mListener.onScrollPositionChanged(newPosition, limit); 195f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 196f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 197f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void putDisplayItem(Position target, Position base, DisplayItem item) { 1989201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang item.setBox(mLayout.getSlotWidth(), mLayout.getSlotHeight()); 199f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ItemEntry entry = new ItemEntry(item, target, base); 200f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mItemList.insertLast(entry); 201f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mItems.put(item, entry); 202f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 203f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 204f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void removeDisplayItem(DisplayItem item) { 205f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ItemEntry entry = mItems.remove(item); 206f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (entry != null) entry.remove(); 207f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 208f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 209f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public Rect getSlotRect(int slotIndex) { 210f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mLayout.getSlotRect(slotIndex); 211f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 212f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 213f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 214f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected boolean onTouch(MotionEvent event) { 215f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mUIListener != null) mUIListener.onUserInteraction(); 216f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mGestureDetector.onTouchEvent(event); 217f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin switch (event.getAction()) { 218f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin case MotionEvent.ACTION_DOWN: 219f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mDownInScrolling = !mScroller.isFinished(); 220f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScroller.forceFinished(); 221f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin break; 222f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 223f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return true; 224f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 225f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 226f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setListener(Listener listener) { 227f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mListener = listener; 228f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 229f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 230f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setUserInteractionListener(UserInteractionListener listener) { 231f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mUIListener = listener; 232f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 233f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 234f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setOverscrollEffect(int kind) { 235f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mOverscrollEffect = kind; 236f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScroller.setOverfling(kind == OVERSCROLL_SYSTEM); 237f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 238f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 239f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 240f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected void render(GLCanvas canvas) { 241f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.save(GLCanvas.SAVE_FLAG_CLIP); 242f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.clipRect(0, 0, getWidth(), getHeight()); 243f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin super.render(canvas); 244f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 245f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin long currentTimeMillis = canvas.currentAnimationTimeMillis(); 246f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin boolean more = mScroller.advanceAnimation(currentTimeMillis); 247f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin boolean paperActive = (mOverscrollEffect == OVERSCROLL_3D) 248f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin && mPaper.advanceAnimation(currentTimeMillis); 249f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateScrollPosition(mScroller.getPosition(), false); 250f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin float interpolate = 1f; 251f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mAnimation != null) { 252f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin more |= mAnimation.calculate(currentTimeMillis); 253f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin interpolate = mAnimation.value; 254f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 255f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 256f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin more |= paperActive; 257f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 258f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (WIDE) { 259f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.translate(-mScrollX, 0, 0); 260f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 261f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.translate(0, -mScrollY, 0); 262f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 263f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 264f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin LinkedNode.List<ItemEntry> list = mItemList; 265f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (ItemEntry entry = list.getLast(); entry != null;) { 266f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (renderItem(canvas, entry, interpolate, 0, paperActive)) { 267f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mCurrentItems.add(entry); 268f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 269f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin entry = list.previousOf(entry); 270f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 271f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 272f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int pass = 1; 273f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin while (!mCurrentItems.isEmpty()) { 274f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin for (int i = 0, n = mCurrentItems.size(); i < n; i++) { 275f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ItemEntry entry = mCurrentItems.get(i); 276f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (renderItem(canvas, entry, interpolate, pass, paperActive)) { 277f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mNextItems.add(entry); 278f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 279f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 280f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mCurrentItems.clear(); 281f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // swap mNextItems with mCurrentItems 282f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ArrayList<ItemEntry> tmp = mNextItems; 283f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mNextItems = mCurrentItems; 284f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mCurrentItems = tmp; 285f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin pass += 1; 286f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 287f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 288f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (WIDE) { 289f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.translate(mScrollX, 0, 0); 290f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 291f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.translate(0, mScrollY, 0); 292f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 293f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 294f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (more) invalidate(); 295f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mMoreAnimation && !more && mUIListener != null) { 296f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mUIListener.onUserInteractionEnd(); 297f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 298f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMoreAnimation = more; 299f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.restore(); 300f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 301f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 302f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private boolean renderItem(GLCanvas canvas, ItemEntry entry, 303f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin float interpolate, int pass, boolean paperActive) { 304f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.save(GLCanvas.SAVE_FLAG_ALPHA | GLCanvas.SAVE_FLAG_MATRIX); 305f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Position position = entry.target; 306f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mPositions != null) { 307f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position = mTempPosition; 308f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position.set(entry.target); 309f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position.x -= mScrollX; 310f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position.y -= mScrollY; 311f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Position source = mPositions 312f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin .getPosition(entry.item.getIdentity(), position); 313f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin source.x += mScrollX; 314f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin source.y += mScrollY; 315f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position = mTempPosition; 316f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Position.interpolate( 317f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin source, entry.target, position, interpolate); 318f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 319f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.multiplyAlpha(position.alpha); 320f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (paperActive) { 321f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.multiplyMatrix(mPaper.getTransform( 322f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin position, entry.base, mScrollX, mScrollY), 0); 323f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 324f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.translate(position.x, position.y, position.z); 325f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 326f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.rotate(position.theta, 0, 0, 1); 327f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin boolean more = entry.item.render(canvas, pass); 328f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin canvas.restore(); 329f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return more; 330f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 331f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 332f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static class MyAnimation extends Animation { 333f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public float value; 334f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 335f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public MyAnimation() { 336f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setInterpolator(new DecelerateInterpolator(4)); 337f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setDuration(1500); 338f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 339f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 340f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 341f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected void onCalculate(float progress) { 342f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin value = progress; 343f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 344f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 345f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 346f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private static class ItemEntry extends LinkedNode { 347f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public DisplayItem item; 348f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public Position target; 349f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public Position base; 350f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 351f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public ItemEntry(DisplayItem item, Position target, Position base) { 352f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin this.item = item; 353f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin this.target = target; 354f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin this.base = base; 355f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 356f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 357f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 3589201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // This Spec class is used to specify the size of each slot in the SlotView. 3599201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // There are two ways to do it: 3609201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // 3619201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // (1) Specify slotWidth and slotHeight: they specify the width and height 3629201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // of each slot. The number of rows and the gap between slots will be 3639201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // determined automatically. 3649201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // (2) Specify rowsLand, rowsPort, and slotGap: they specify the number 3659201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // of rows in landscape/portrait mode and the gap between slots. The 3669201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // width and height of each slot is determined automatically. 3679201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // 3689201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // The initial value of -1 means they are not specified. 3699201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public static class Spec { 3709201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public int slotWidth = -1; 3719201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public int slotHeight = -1; 3729201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 3739201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public int rowsLand = -1; 3749201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public int rowsPort = -1; 3759201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public int slotGap = -1; 3769201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 3779201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang static Spec newWithSize(int width, int height) { 3789201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang Spec s = new Spec(); 3799201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang s.slotWidth = width; 3809201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang s.slotHeight = height; 3819201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang return s; 3829201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 3839201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 3849201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang static Spec newWithRows(int rowsLand, int rowsPort, int slotGap) { 3859201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang Spec s = new Spec(); 3869201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang s.rowsLand = rowsLand; 3879201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang s.rowsPort = rowsPort; 3889201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang s.slotGap = slotGap; 3899201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang return s; 3909201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 3919201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 3929201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 393f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public static class Layout { 394f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 395f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mVisibleStart; 396f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mVisibleEnd; 397f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 398f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mSlotCount; 399f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mSlotWidth; 400f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mSlotHeight; 4019201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang private int mSlotGap; 4029201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 4039201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang private Spec mSpec; 404f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 405f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mWidth; 406f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mHeight; 407f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 408f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mUnitCount; 409f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mContentLength; 410f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mScrollPosition; 411f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 412f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mVerticalPadding; 413f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private int mHorizontalPadding; 414f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 4159201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public void setSlotSpec(Spec spec) { 4169201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mSpec = spec; 417f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 418f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 419f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean setSlotCount(int slotCount) { 420f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mSlotCount = slotCount; 421f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int hPadding = mHorizontalPadding; 422f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int vPadding = mVerticalPadding; 423f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin initLayoutParameters(); 424f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return vPadding != mVerticalPadding || hPadding != mHorizontalPadding; 425f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 426f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 427f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public Rect getSlotRect(int index) { 428f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int col, row; 429f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (WIDE) { 430f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin col = index / mUnitCount; 431f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin row = index - col * mUnitCount; 432f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 433f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin row = index / mUnitCount; 434f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin col = index - row * mUnitCount; 435f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 436f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 4379201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int x = mHorizontalPadding + col * (mSlotWidth + mSlotGap); 4389201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int y = mVerticalPadding + row * (mSlotHeight + mSlotGap); 439f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return new Rect(x, y, x + mSlotWidth, y + mSlotHeight); 440f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 441f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 4429201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public int getSlotWidth() { 4439201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang return mSlotWidth; 4449201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 4459201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 4469201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang public int getSlotHeight() { 4479201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang return mSlotHeight; 4489201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 4499201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 450f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getContentLength() { 451f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mContentLength; 452f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 453f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 454f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // Calculate 455f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // (1) mUnitCount: the number of slots we can fit into one column (or row). 456f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // (2) mContentLength: the width (or height) we need to display all the 457f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // columns (rows). 458f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // (3) padding[]: the vertical and horizontal padding we need in order 459f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // to put the slots towards to the center of the display. 460f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // 461f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // The "major" direction is the direction the user can scroll. The other 462f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // direction is the "minor" direction. 463f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // 464f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // The comments inside this method are the description when the major 465f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // directon is horizontal (X), and the minor directon is vertical (Y). 466f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void initLayoutParameters( 467f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int majorLength, int minorLength, /* The view width and height */ 468f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int majorUnitSize, int minorUnitSize, /* The slot width and height */ 469f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int[] padding) { 4709201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int unitCount = (minorLength + mSlotGap) / (minorUnitSize + mSlotGap); 471f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (unitCount == 0) unitCount = 1; 472f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mUnitCount = unitCount; 473f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 474f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // We put extra padding above and below the column. 475f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int availableUnits = Math.min(mUnitCount, mSlotCount); 4769201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int usedMinorLength = availableUnits * minorUnitSize + 4779201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang (availableUnits - 1) * mSlotGap; 4789201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang padding[0] = (minorLength - usedMinorLength) / 2; 479f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 480f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // Then calculate how many columns we need for all slots. 481f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int count = ((mSlotCount + mUnitCount - 1) / mUnitCount); 4829201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mContentLength = count * majorUnitSize + (count - 1) * mSlotGap; 483f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 484f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // If the content length is less then the screen width, put 485f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // extra padding in left and right. 486f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin padding[1] = Math.max(0, (majorLength - mContentLength) / 2); 487f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 488f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 489f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void initLayoutParameters() { 4909201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang // Initialize mSlotWidth and mSlotHeight from mSpec 4919201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang if (mSpec.slotWidth != -1) { 4929201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mSlotGap = 0; 4939201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mSlotWidth = mSpec.slotWidth; 4949201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mSlotHeight = mSpec.slotHeight; 4959201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } else { 4969201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int rows = (mWidth > mHeight) ? mSpec.rowsLand : mSpec.rowsPort; 4979201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mSlotGap = mSpec.slotGap; 4989201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mSlotHeight = Math.max(1, (mHeight - (rows - 1) * mSlotGap) / rows); 4999201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang mSlotWidth = mSlotHeight; 5009201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 5019201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 502f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int[] padding = new int[2]; 503f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (WIDE) { 504f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin initLayoutParameters(mWidth, mHeight, mSlotWidth, mSlotHeight, padding); 505f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mVerticalPadding = padding[0]; 506f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mHorizontalPadding = padding[1]; 507f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 508f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin initLayoutParameters(mHeight, mWidth, mSlotHeight, mSlotWidth, padding); 509f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mVerticalPadding = padding[1]; 510f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mHorizontalPadding = padding[0]; 511f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 512f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateVisibleSlotRange(); 513f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 514f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 515f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setSize(int width, int height) { 516f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mWidth = width; 517f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mHeight = height; 518f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin initLayoutParameters(); 519f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 520f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 521f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void updateVisibleSlotRange() { 522f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int position = mScrollPosition; 523f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 524f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (WIDE) { 5259201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int startCol = position / (mSlotWidth + mSlotGap); 5269201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int start = Math.max(0, mUnitCount * startCol); 5279201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int endCol = (position + mWidth + mSlotWidth + mSlotGap - 1) / 5289201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang (mSlotWidth + mSlotGap); 5299201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int end = Math.min(mSlotCount, mUnitCount * endCol); 530f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setVisibleRange(start, end); 531f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 5329201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int startRow = position / (mSlotHeight + mSlotGap); 5339201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int start = Math.max(0, mUnitCount * startRow); 5349201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int endRow = (position + mHeight + mSlotHeight + mSlotGap - 1) / 5359201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang (mSlotHeight + mSlotGap); 5369201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int end = Math.min(mSlotCount, mUnitCount * endRow); 537f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setVisibleRange(start, end); 538f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 539f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 540f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 541f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setScrollPosition(int position) { 542f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mScrollPosition == position) return; 543f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScrollPosition = position; 544f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateVisibleSlotRange(); 545f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 546f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 547f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private void setVisibleRange(int start, int end) { 548f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (start == mVisibleStart && end == mVisibleEnd) return; 549f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (start < end) { 550f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mVisibleStart = start; 551f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mVisibleEnd = end; 552f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } else { 553f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mVisibleStart = mVisibleEnd = 0; 554f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 555f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 556f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 557f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getVisibleStart() { 558f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mVisibleStart; 559f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 560f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 561f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getVisibleEnd() { 562f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mVisibleEnd; 563f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 564f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 565f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getSlotIndexByPosition(float x, float y) { 5669201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int absoluteX = Math.round(x) + (WIDE ? mScrollPosition : 0); 5679201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int absoluteY = Math.round(y) + (WIDE ? 0 : mScrollPosition); 5689201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 569f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin absoluteX -= mHorizontalPadding; 5709201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang absoluteY -= mVerticalPadding; 5719201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 5729201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int columnIdx = absoluteX / (mSlotWidth + mSlotGap); 5739201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang int rowIdx = absoluteY / (mSlotHeight + mSlotGap); 5749201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 5759201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang if (columnIdx < 0 || (!WIDE && columnIdx >= mUnitCount)) { 576f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return INDEX_NONE; 577f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 578f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 5799201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang if (rowIdx < 0 || (WIDE && rowIdx >= mUnitCount)) { 580f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return INDEX_NONE; 581f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 5829201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 5839201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang if (absoluteX % (mSlotWidth + mSlotGap) >= mSlotWidth) { 5849201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang return INDEX_NONE; 5859201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 5869201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 5879201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang if (absoluteY % (mSlotHeight + mSlotGap) >= mSlotHeight) { 5889201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang return INDEX_NONE; 5899201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang } 5909201679ed1c485767f2e334aa618bd733024af03Chih-Chung Chang 591f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int index = WIDE 592f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin ? (columnIdx * mUnitCount + rowIdx) 593f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin : (rowIdx * mUnitCount + columnIdx); 594f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 595f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return index >= mSlotCount ? INDEX_NONE : index; 596f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 597f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 598f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getScrollLimit() { 599f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int limit = WIDE ? mContentLength - mWidth : mContentLength - mHeight; 600f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return limit <= 0 ? 0 : limit; 601f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 602f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 603f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 604bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang private class MyGestureListener implements 605bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang GestureDetector.OnGestureListener { 606bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang private boolean isDown; 607bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang 608bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang // We call the listener's onDown() when our onShowPress() is called and 609bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang // call the listener's onUp() when we receive any further event. 610bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang @Override 611bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang public void onShowPress(MotionEvent e) { 612bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang if (isDown) return; 613bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang int index = mLayout.getSlotIndexByPosition(e.getX(), e.getY()); 614bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang if (index != INDEX_NONE) { 615bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang isDown = true; 616bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang mListener.onDown(index); 617bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang } 618bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang } 619bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang 620bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang private void cancelDown() { 621bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang if (!isDown) return; 622bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang isDown = false; 623bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang mListener.onUp(); 624bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang } 625bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang 626bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang @Override 627bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang public boolean onDown(MotionEvent e) { 628bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang return false; 629bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang } 630f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 631f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 632f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean onFling(MotionEvent e1, 633f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin MotionEvent e2, float velocityX, float velocityY) { 634bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang cancelDown(); 635f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int scrollLimit = mLayout.getScrollLimit(); 636f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (scrollLimit == 0) return false; 637f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin float velocity = WIDE ? velocityX : velocityY; 638f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mScroller.fling((int) -velocity, 0, scrollLimit); 639f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mUIListener != null) mUIListener.onUserInteractionBegin(); 640f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin invalidate(); 641f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return true; 642f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 643f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 644f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 645f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean onScroll(MotionEvent e1, 646f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin MotionEvent e2, float distanceX, float distanceY) { 647bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang cancelDown(); 648f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin float distance = WIDE ? distanceX : distanceY; 649f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin boolean canMove = mScroller.startScroll( 650f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin Math.round(distance), 0, mLayout.getScrollLimit()); 651f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mOverscrollEffect == OVERSCROLL_3D && !canMove) { 652f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mPaper.overScroll(distance); 653f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 654f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin invalidate(); 655f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return true; 656f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 657f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 658f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 659f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean onSingleTapUp(MotionEvent e) { 660bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang cancelDown(); 661f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mDownInScrolling) return true; 662f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int index = mLayout.getSlotIndexByPosition(e.getX(), e.getY()); 663f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (index != INDEX_NONE) mListener.onSingleTapUp(index); 664f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return true; 665f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 666f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 667f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin @Override 668f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void onLongPress(MotionEvent e) { 669bc2154199aee16762e3758ad0cfed685323d9a9fChih-Chung Chang cancelDown(); 670f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mDownInScrolling) return; 671f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin lockRendering(); 672f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin try { 673f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin int index = mLayout.getSlotIndexByPosition(e.getX(), e.getY()); 674f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (index != INDEX_NONE) mListener.onLongTap(index); 675f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } finally { 676f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin unlockRendering(); 677f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 678f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 679f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 680f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 681f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void setStartIndex(int index) { 682f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mStartIndex = index; 683f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 684f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 685f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // Return true if the layout parameters have been changed 686f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean setSlotCount(int slotCount) { 687f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin boolean changed = mLayout.setSlotCount(slotCount); 688f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 689f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // mStartIndex is applied the first time setSlotCount is called. 690f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mStartIndex != INDEX_NONE) { 691f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin setCenterIndex(mStartIndex); 692f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mStartIndex = INDEX_NONE; 693f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 694f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin updateScrollPosition(WIDE ? mScrollX : mScrollY, true); 695f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return changed; 696f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 697f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 698f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getVisibleStart() { 699f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mLayout.getVisibleStart(); 700f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 701f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 702f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getVisibleEnd() { 703f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mLayout.getVisibleEnd(); 704f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 705f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 706f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getScrollX() { 707f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mScrollX; 708f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 709f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 710f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public int getScrollY() { 711f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mScrollY; 712f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 713f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin} 714