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 
18 package com.android.mail.ui;
19 
20 import android.widget.ListView;
21 
22 /**
23  * A drawer that is shown in one pane mode, as a pull-out from the left.  All the
24  * implementation is inherited from the FolderListFragment.
25  *
26  * The drawer shows a list of accounts, the recent folders, and a list of top-level folders for
27  * the given account. This fragment is created using no arguments, it gets all its state from the
28  * controller in {@link #onActivityCreated(android.os.Bundle)}. In particular, it gets the current
29  * account, the list of accounts, and the current folder from the {@link ControllableActivity}.
30  *
31  * Once it has this information, the drawer sets itself up to observe for changes and allows the
32  * user to change folders and accounts.
33  *
34  * The drawer is always instantiated through XML resources: in one_pane_activity.xml and in
35  * two_pane_activity.xml
36  */
37 public class DrawerFragment extends FolderListFragment {
38     /**
39      * The only way a drawer is constructed is through XML layouts, and so it needs no constructor
40      * like {@link FolderListFragment#ofTopLevelTree(android.net.Uri, java.util.ArrayList}
41      */
DrawerFragment()42     public DrawerFragment() {
43         super();
44         // Drawer is always divided: it shows groups for inboxes, recent folders and all other
45         // folders.
46         mIsDivided = true;
47         // The drawer shows the footer.
48         mIsFolderSelectionActivity = false;
49     }
50 
51     @Override
getListViewChoiceMode()52     protected int getListViewChoiceMode() {
53         // Always let one item be selected
54         return ListView.CHOICE_MODE_SINGLE;
55     }
56 }
57