1 /* 2 * Copyright (C) 2013 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.ingest.adapter; 18 19 import java.util.ArrayList; 20 import java.util.Collection; 21 22 public abstract class CheckBroker { 23 private Collection<OnCheckedChangedListener> mListeners = 24 new ArrayList<OnCheckedChangedListener>(); 25 26 public interface OnCheckedChangedListener { 27 public void onCheckedChanged(int position, boolean isChecked); 28 public void onBulkCheckedChanged(); 29 } 30 31 public abstract void setItemChecked(int position, boolean checked); 32 33 public void onCheckedChange(int position, boolean checked) { 34 if (isItemChecked(position) != checked) { 35 for (OnCheckedChangedListener l : mListeners) { 36 l.onCheckedChanged(position, checked); 37 } 38 } 39 } 40 41 public void onBulkCheckedChange() { 42 for (OnCheckedChangedListener l : mListeners) { 43 l.onBulkCheckedChanged(); 44 } 45 } 46 47 public abstract boolean isItemChecked(int position); 48 49 public void registerOnCheckedChangeListener(OnCheckedChangedListener l) { 50 mListeners.add(l); 51 } 52 53 public void unregisterOnCheckedChangeListener(OnCheckedChangedListener l) { 54 mListeners.remove(l); 55 } 56 } 57
