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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 import android.content.Context;
     23 
     24 /**
     25  * Represents a folder containing shortcuts or apps.
     26  */
     27 class FolderInfo extends ItemInfo {
     28 
     29     /**
     30      * Whether this folder has been opened
     31      */
     32     boolean opened;
     33 
     34     /**
     35      * The apps and shortcuts
     36      */
     37     ArrayList<ShortcutInfo> contents = new ArrayList<ShortcutInfo>();
     38 
     39     ArrayList<FolderListener> listeners = new ArrayList<FolderListener>();
     40 
     41     FolderInfo() {
     42         itemType = LauncherSettings.Favorites.ITEM_TYPE_FOLDER;
     43     }
     44 
     45     /**
     46      * Add an app or shortcut
     47      *
     48      * @param item
     49      */
     50     public void add(ShortcutInfo item) {
     51         contents.add(item);
     52         for (int i = 0; i < listeners.size(); i++) {
     53             listeners.get(i).onAdd(item);
     54         }
     55         itemsChanged();
     56     }
     57 
     58     /**
     59      * Remove an app or shortcut. Does not change the DB.
     60      *
     61      * @param item
     62      */
     63     public void remove(ShortcutInfo item) {
     64         contents.remove(item);
     65         for (int i = 0; i < listeners.size(); i++) {
     66             listeners.get(i).onRemove(item);
     67         }
     68         itemsChanged();
     69     }
     70 
     71     public void setTitle(CharSequence title) {
     72         this.title = title;
     73         for (int i = 0; i < listeners.size(); i++) {
     74             listeners.get(i).onTitleChanged(title);
     75         }
     76     }
     77 
     78     @Override
     79     void onAddToDatabase(Context context, ContentValues values) {
     80         super.onAddToDatabase(context, values);
     81         values.put(LauncherSettings.Favorites.TITLE, title.toString());
     82     }
     83 
     84     void addListener(FolderListener listener) {
     85         listeners.add(listener);
     86     }
     87 
     88     void removeListener(FolderListener listener) {
     89         if (listeners.contains(listener)) {
     90             listeners.remove(listener);
     91         }
     92     }
     93 
     94     void itemsChanged() {
     95         for (int i = 0; i < listeners.size(); i++) {
     96             listeners.get(i).onItemsChanged();
     97         }
     98     }
     99 
    100     @Override
    101     void unbind() {
    102         super.unbind();
    103         listeners.clear();
    104     }
    105 
    106     interface FolderListener {
    107         public void onAdd(ShortcutInfo item);
    108         public void onRemove(ShortcutInfo item);
    109         public void onTitleChanged(CharSequence title);
    110         public void onItemsChanged();
    111     }
    112 }
    113