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
17package android.support.v7.app;
18
19import android.app.Dialog;
20import android.content.Context;
21import android.content.res.Configuration;
22import android.os.Bundle;
23import android.support.v4.app.DialogFragment;
24import android.support.v7.media.MediaRouteSelector;
25
26/**
27 * Media route chooser dialog fragment.
28 * <p>
29 * Creates a {@link MediaRouteChooserDialog}.  The application may subclass
30 * this dialog fragment to customize the media route chooser dialog.
31 * </p>
32 */
33public class MediaRouteChooserDialogFragment extends DialogFragment {
34    private final String ARGUMENT_SELECTOR = "selector";
35
36    private MediaRouteChooserDialog mDialog;
37    private MediaRouteSelector mSelector;
38
39    /**
40     * Creates a media route chooser dialog fragment.
41     * <p>
42     * All subclasses of this class must also possess a default constructor.
43     * </p>
44     */
45    public MediaRouteChooserDialogFragment() {
46        setCancelable(true);
47    }
48
49    /**
50     * Gets the media route selector for filtering the routes that the user can select.
51     *
52     * @return The selector, never null.
53     */
54    public MediaRouteSelector getRouteSelector() {
55        ensureRouteSelector();
56        return mSelector;
57    }
58
59    private void ensureRouteSelector() {
60        if (mSelector == null) {
61            Bundle args = getArguments();
62            if (args != null) {
63                mSelector = MediaRouteSelector.fromBundle(args.getBundle(ARGUMENT_SELECTOR));
64            }
65            if (mSelector == null) {
66                mSelector = MediaRouteSelector.EMPTY;
67            }
68        }
69    }
70
71    /**
72     * Sets the media route selector for filtering the routes that the user can select.
73     * This method must be called before the fragment is added.
74     *
75     * @param selector The selector to set.
76     */
77    public void setRouteSelector(MediaRouteSelector selector) {
78        if (selector == null) {
79            throw new IllegalArgumentException("selector must not be null");
80        }
81
82        ensureRouteSelector();
83        if (!mSelector.equals(selector)) {
84            mSelector = selector;
85
86            Bundle args = getArguments();
87            if (args == null) {
88                args = new Bundle();
89            }
90            args.putBundle(ARGUMENT_SELECTOR, selector.asBundle());
91            setArguments(args);
92
93            MediaRouteChooserDialog dialog = (MediaRouteChooserDialog)getDialog();
94            if (dialog != null) {
95                dialog.setRouteSelector(selector);
96            }
97        }
98    }
99
100    /**
101     * Called when the chooser dialog is being created.
102     * <p>
103     * Subclasses may override this method to customize the dialog.
104     * </p>
105     */
106    public MediaRouteChooserDialog onCreateChooserDialog(
107            Context context, Bundle savedInstanceState) {
108        return new MediaRouteChooserDialog(context);
109    }
110
111    @Override
112    public Dialog onCreateDialog(Bundle savedInstanceState) {
113        mDialog = onCreateChooserDialog(getContext(), savedInstanceState);
114        mDialog.setRouteSelector(getRouteSelector());
115        return mDialog;
116    }
117
118    @Override
119    public void onConfigurationChanged(Configuration newConfig) {
120        super.onConfigurationChanged(newConfig);
121        if (mDialog != null) {
122            mDialog.updateLayout();
123        }
124    }
125}
126