1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.data; 18 19 import com.android.gallery3d.R; 20 import com.android.gallery3d.app.GalleryApp; 21 import com.android.gallery3d.util.Future; 22 23 // ComboAlbumSet combines multiple media sets into one. It lists all sub 24 // media sets from the input album sets. 25 // This only handles SubMediaSets, not MediaItems. (That's all we need now) 26 public class ComboAlbumSet extends MediaSet implements ContentListener { 27 @SuppressWarnings("unused") 28 private static final String TAG = "ComboAlbumSet"; 29 private final MediaSet[] mSets; 30 private final String mName; 31 32 public ComboAlbumSet(Path path, GalleryApp application, MediaSet[] mediaSets) { 33 super(path, nextVersionNumber()); 34 mSets = mediaSets; 35 for (MediaSet set : mSets) { 36 set.addContentListener(this); 37 } 38 mName = application.getResources().getString( 39 R.string.set_label_all_albums); 40 } 41 42 @Override 43 public MediaSet getSubMediaSet(int index) { 44 for (MediaSet set : mSets) { 45 int size = set.getSubMediaSetCount(); 46 if (index < size) { 47 return set.getSubMediaSet(index); 48 } 49 index -= size; 50 } 51 return null; 52 } 53 54 @Override 55 public int getSubMediaSetCount() { 56 int count = 0; 57 for (MediaSet set : mSets) { 58 count += set.getSubMediaSetCount(); 59 } 60 return count; 61 } 62 63 @Override 64 public String getName() { 65 return mName; 66 } 67 68 @Override 69 public boolean isLoading() { 70 for (int i = 0, n = mSets.length; i < n; ++i) { 71 if (mSets[i].isLoading()) return true; 72 } 73 return false; 74 } 75 76 @Override 77 public long reload() { 78 boolean changed = false; 79 for (int i = 0, n = mSets.length; i < n; ++i) { 80 long version = mSets[i].reload(); 81 if (version > mDataVersion) changed = true; 82 } 83 if (changed) mDataVersion = nextVersionNumber(); 84 return mDataVersion; 85 } 86 87 @Override 88 public void onContentDirty() { 89 notifyContentChanged(); 90 } 91 92 @Override 93 public Future<Integer> requestSync(SyncListener listener) { 94 return requestSyncOnMultipleSets(mSets, listener); 95 } 96 } 97
