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.data; 18f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 19f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport android.net.Uri; 20f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 212b3ee0ea07246b859a5b75d8a6102a7cce7ec838Owen Linimport com.android.gallery3d.app.GalleryApp; 222b3ee0ea07246b859a5b75d8a6102a7cce7ec838Owen Lin 23f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linimport java.util.concurrent.atomic.AtomicBoolean; 24f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 25f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin// This handles change notification for media sets. 26f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Linpublic class ChangeNotifier { 27f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 28f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private MediaSet mMediaSet; 29f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin private AtomicBoolean mContentDirty = new AtomicBoolean(true); 30f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 31f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public ChangeNotifier(MediaSet set, Uri uri, GalleryApp application) { 32f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMediaSet = set; 33f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin application.getDataManager().registerChangeNotifier(uri, this); 34f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 35f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 36a0ce682e40c39ce046c48d8a7f989fff01bb9f2cWu-cheng Li public ChangeNotifier(MediaSet set, Uri[] uris, GalleryApp application) { 37a0ce682e40c39ce046c48d8a7f989fff01bb9f2cWu-cheng Li mMediaSet = set; 38a0ce682e40c39ce046c48d8a7f989fff01bb9f2cWu-cheng Li for (int i = 0; i < uris.length; i++) { 39a0ce682e40c39ce046c48d8a7f989fff01bb9f2cWu-cheng Li application.getDataManager().registerChangeNotifier(uris[i], this); 40a0ce682e40c39ce046c48d8a7f989fff01bb9f2cWu-cheng Li } 41a0ce682e40c39ce046c48d8a7f989fff01bb9f2cWu-cheng Li } 42a0ce682e40c39ce046c48d8a7f989fff01bb9f2cWu-cheng Li 43f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin // Returns the dirty flag and clear it. 44f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public boolean isDirty() { 45f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin return mContentDirty.compareAndSet(true, false); 46f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 47f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 48f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin public void fakeChange() { 49f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin onChange(false); 50f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 51f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin 52f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin protected void onChange(boolean selfChange) { 53f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin if (mContentDirty.compareAndSet(false, true)) { 54f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin mMediaSet.notifyContentChanged(); 55f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 56f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin } 57f9a0a4306d589b4a4e20554fed512a603426bfa1Owen Lin}