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      1 /*
      2  * Copyright (C) 2008 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.launcher2;
     18 
     19 import java.util.ArrayList;
     20 
     21 import android.content.ContentValues;
     22 
     23 /**
     24  * Represents a folder containing shortcuts or apps.
     25  */
     26 class FolderInfo extends ItemInfo {
     27 
     28     /**
     29      * Whether this folder has been opened
     30      */
     31     boolean opened;
     32 
     33     /**
     34      * The apps and shortcuts
     35      */
     36     ArrayList<ShortcutInfo> contents = new ArrayList<ShortcutInfo>();
     37 
     38     ArrayList<FolderListener> listeners = new ArrayList<FolderListener>();
     39 
     40     FolderInfo() {
     41         itemType = LauncherSettings.Favorites.ITEM_TYPE_FOLDER;
     42     }
     43 
     44     /**
     45      * Add an app or shortcut
     46      *
     47      * @param item
     48      */
     49     public void add(ShortcutInfo item) {
     50         contents.add(item);
     51         for (int i = 0; i < listeners.size(); i++) {
     52             listeners.get(i).onAdd(item);
     53         }
     54         itemsChanged();
     55     }
     56 
     57     /**
     58      * Remove an app or shortcut. Does not change the DB.
     59      *
     60      * @param item
     61      */
     62     public void remove(ShortcutInfo item) {
     63         contents.remove(item);
     64         for (int i = 0; i < listeners.size(); i++) {
     65             listeners.get(i).onRemove(item);
     66         }
     67         itemsChanged();
     68     }
     69 
     70     public void setTitle(CharSequence title) {
     71         this.title = title;
     72         for (int i = 0; i < listeners.size(); i++) {
     73             listeners.get(i).onTitleChanged(title);
     74         }
     75     }
     76 
     77     @Override
     78     void onAddToDatabase(ContentValues values) {
     79         super.onAddToDatabase(values);
     80         values.put(LauncherSettings.Favorites.TITLE, title.toString());
     81     }
     82 
     83     void addListener(FolderListener listener) {
     84         listeners.add(listener);
     85     }
     86 
     87     void removeListener(FolderListener listener) {
     88         if (listeners.contains(listener)) {
     89             listeners.remove(listener);
     90         }
     91     }
     92 
     93     void itemsChanged() {
     94         for (int i = 0; i < listeners.size(); i++) {
     95             listeners.get(i).onItemsChanged();
     96         }
     97     }
     98 
     99     @Override
    100     void unbind() {
    101         super.unbind();
    102         listeners.clear();
    103     }
    104 
    105     interface FolderListener {
    106         public void onAdd(ShortcutInfo item);
    107         public void onRemove(ShortcutInfo item);
    108         public void onTitleChanged(CharSequence title);
    109         public void onItemsChanged();
    110     }
    111 }
    112