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
18package com.android.mail.ui;
19
20import 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 */
37public 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     */
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 also switches accounts, so don't hide accounts.
48        mHideAccounts = false;
49    }
50
51    @Override
52    protected int getListViewChoiceMode() {
53        // Always let one item be selected
54        return ListView.CHOICE_MODE_SINGLE;
55    }
56}
57