| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.gallery3d.ui; |
| |
| import android.graphics.Rect; |
| |
| import com.android.gallery3d.app.GalleryActivity; |
| import com.android.gallery3d.common.Utils; |
| import com.android.gallery3d.data.MediaItem; |
| import com.android.gallery3d.data.MediaSet; |
| import com.android.gallery3d.ui.PositionRepository.Position; |
| |
| import java.util.Random; |
| |
| public class AlbumSetView extends SlotView { |
| @SuppressWarnings("unused") |
| private static final String TAG = "AlbumSetView"; |
| private static final int CACHE_SIZE = 32; |
| private static final float PHOTO_DISTANCE = 35f; |
| |
| private int mVisibleStart; |
| private int mVisibleEnd; |
| |
| private final Random mRandom = new Random(); |
| private final long mSeed = mRandom.nextLong(); |
| |
| private AlbumSetSlidingWindow mDataWindow; |
| private final GalleryActivity mActivity; |
| private final LabelSpec mLabelSpec; |
| |
| private SelectionDrawer mSelectionDrawer; |
| |
| public static interface Model { |
| public MediaItem[] getCoverItems(int index); |
| public MediaSet getMediaSet(int index); |
| public int size(); |
| public void setActiveWindow(int start, int end); |
| public void setModelListener(ModelListener listener); |
| } |
| |
| public static interface ModelListener { |
| public void onWindowContentChanged(int index); |
| public void onSizeChanged(int size); |
| } |
| |
| public static class AlbumSetItem { |
| public DisplayItem[] covers; |
| public DisplayItem labelItem; |
| public long setDataVersion; |
| } |
| |
| public static class LabelSpec { |
| public int labelBackgroundHeight; |
| public int titleOffset; |
| public int countOffset; |
| public int titleFontSize; |
| public int countFontSize; |
| public int leftMargin; |
| public int iconSize; |
| } |
| |
| public AlbumSetView(GalleryActivity activity, SelectionDrawer drawer, |
| SlotView.Spec slotViewSpec, LabelSpec labelSpec) { |
| super(activity.getAndroidContext()); |
| mActivity = activity; |
| setSelectionDrawer(drawer); |
| setSlotSpec(slotViewSpec); |
| mLabelSpec = labelSpec; |
| } |
| |
| public void setSelectionDrawer(SelectionDrawer drawer) { |
| mSelectionDrawer = drawer; |
| if (mDataWindow != null) { |
| mDataWindow.setSelectionDrawer(drawer); |
| } |
| } |
| |
| public void setModel(AlbumSetView.Model model) { |
| if (mDataWindow != null) { |
| mDataWindow.setListener(null); |
| setSlotCount(0); |
| mDataWindow = null; |
| } |
| if (model != null) { |
| mDataWindow = new AlbumSetSlidingWindow(mActivity, mLabelSpec, |
| mSelectionDrawer, model, CACHE_SIZE); |
| mDataWindow.setListener(new MyCacheListener()); |
| setSlotCount(mDataWindow.size()); |
| updateVisibleRange(getVisibleStart(), getVisibleEnd()); |
| } |
| } |
| |
| private void putSlotContent(int slotIndex, AlbumSetItem entry) { |
| // Get displayItems from mItemsetMap or create them from MediaSet. |
| Utils.assertTrue(entry != null); |
| Rect rect = getSlotRect(slotIndex); |
| |
| DisplayItem[] items = entry.covers; |
| mRandom.setSeed(slotIndex ^ mSeed); |
| |
| int x = (rect.left + rect.right) / 2; |
| int y = (rect.top + rect.bottom) / 2; |
| |
| Position basePosition = new Position(x, y, 0); |
| |
| // Put the cover items in reverse order, so that the first item is on |
| // top of the rest. |
| Position position = new Position(x, y, 0f); |
| putDisplayItem(position, position, entry.labelItem); |
| |
| for (int i = 0, n = items.length; i < n; ++i) { |
| DisplayItem item = items[i]; |
| float dx = 0; |
| float dy = 0; |
| float dz = 0f; |
| float theta = 0; |
| if (i != 0) { |
| dz = i * PHOTO_DISTANCE; |
| } |
| position = new Position(x + dx, y + dy, dz); |
| position.theta = theta; |
| putDisplayItem(position, basePosition, item); |
| } |
| |
| } |
| |
| private void freeSlotContent(int index, AlbumSetItem entry) { |
| if (entry == null) return; |
| for (DisplayItem item : entry.covers) { |
| removeDisplayItem(item); |
| } |
| removeDisplayItem(entry.labelItem); |
| } |
| |
| public int size() { |
| return mDataWindow.size(); |
| } |
| |
| @Override |
| public void onLayoutChanged(int width, int height) { |
| updateVisibleRange(0, 0); |
| updateVisibleRange(getVisibleStart(), getVisibleEnd()); |
| } |
| |
| @Override |
| public void onScrollPositionChanged(int position) { |
| super.onScrollPositionChanged(position); |
| updateVisibleRange(getVisibleStart(), getVisibleEnd()); |
| } |
| |
| private void updateVisibleRange(int start, int end) { |
| if (start == mVisibleStart && end == mVisibleEnd) { |
| // we need to set the mDataWindow active range in any case. |
| mDataWindow.setActiveWindow(start, end); |
| return; |
| } |
| if (start >= mVisibleEnd || mVisibleStart >= end) { |
| for (int i = mVisibleStart, n = mVisibleEnd; i < n; ++i) { |
| freeSlotContent(i, mDataWindow.get(i)); |
| } |
| mDataWindow.setActiveWindow(start, end); |
| for (int i = start; i < end; ++i) { |
| putSlotContent(i, mDataWindow.get(i)); |
| } |
| } else { |
| for (int i = mVisibleStart; i < start; ++i) { |
| freeSlotContent(i, mDataWindow.get(i)); |
| } |
| for (int i = end, n = mVisibleEnd; i < n; ++i) { |
| freeSlotContent(i, mDataWindow.get(i)); |
| } |
| mDataWindow.setActiveWindow(start, end); |
| for (int i = start, n = mVisibleStart; i < n; ++i) { |
| putSlotContent(i, mDataWindow.get(i)); |
| } |
| for (int i = mVisibleEnd; i < end; ++i) { |
| putSlotContent(i, mDataWindow.get(i)); |
| } |
| } |
| mVisibleStart = start; |
| mVisibleEnd = end; |
| |
| invalidate(); |
| } |
| |
| @Override |
| protected void render(GLCanvas canvas) { |
| mSelectionDrawer.prepareDrawing(); |
| super.render(canvas); |
| } |
| |
| private class MyCacheListener implements AlbumSetSlidingWindow.Listener { |
| |
| public void onSizeChanged(int size) { |
| if (setSlotCount(size)) { |
| // If the layout parameters are changed, we need reput all items. |
| // We keep the visible range at the same center but with size 0. |
| // So that we can: |
| // 1.) flush all visible items |
| // 2.) keep the cached data |
| int center = (getVisibleStart() + getVisibleEnd()) / 2; |
| updateVisibleRange(center, center); |
| } |
| updateVisibleRange(getVisibleStart(), getVisibleEnd()); |
| invalidate(); |
| } |
| |
| public void onWindowContentChanged(int slot, AlbumSetItem old, AlbumSetItem update) { |
| freeSlotContent(slot, old); |
| putSlotContent(slot, update); |
| invalidate(); |
| } |
| |
| public void onContentInvalidated() { |
| invalidate(); |
| } |
| } |
| |
| public void pause() { |
| for (int i = mVisibleStart, n = mVisibleEnd; i < n; ++i) { |
| freeSlotContent(i, mDataWindow.get(i)); |
| } |
| mDataWindow.pause(); |
| } |
| |
| public void resume() { |
| mDataWindow.resume(); |
| for (int i = mVisibleStart, n = mVisibleEnd; i < n; ++i) { |
| putSlotContent(i, mDataWindow.get(i)); |
| } |
| } |
| } |