1/*
2 * Copyright 2018 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 com.android.support.mediarouter.app;
18
19import android.app.Dialog;
20import android.app.DialogFragment;
21import android.content.Context;
22import android.content.res.Configuration;
23import android.os.Bundle;
24
25import com.android.support.mediarouter.media.MediaRouteSelector;
26
27/**
28 * Media route chooser dialog fragment.
29 * <p>
30 * Creates a {@link MediaRouteChooserDialog}.  The application may subclass
31 * this dialog fragment to customize the media route chooser dialog.
32 * </p>
33 */
34public class MediaRouteChooserDialogFragment extends DialogFragment {
35    private final String ARGUMENT_SELECTOR = "selector";
36
37    private MediaRouteChooserDialog mDialog;
38    private MediaRouteSelector mSelector;
39
40    /**
41     * Creates a media route chooser dialog fragment.
42     * <p>
43     * All subclasses of this class must also possess a default constructor.
44     * </p>
45     */
46    public MediaRouteChooserDialogFragment() {
47        setCancelable(true);
48    }
49
50    /**
51     * Gets the media route selector for filtering the routes that the user can select.
52     *
53     * @return The selector, never null.
54     */
55    public MediaRouteSelector getRouteSelector() {
56        ensureRouteSelector();
57        return mSelector;
58    }
59
60    private void ensureRouteSelector() {
61        if (mSelector == null) {
62            Bundle args = getArguments();
63            if (args != null) {
64                mSelector = MediaRouteSelector.fromBundle(args.getBundle(ARGUMENT_SELECTOR));
65            }
66            if (mSelector == null) {
67                mSelector = MediaRouteSelector.EMPTY;
68            }
69        }
70    }
71
72    /**
73     * Sets the media route selector for filtering the routes that the user can select.
74     * This method must be called before the fragment is added.
75     *
76     * @param selector The selector to set.
77     */
78    public void setRouteSelector(MediaRouteSelector selector) {
79        if (selector == null) {
80            throw new IllegalArgumentException("selector must not be null");
81        }
82
83        ensureRouteSelector();
84        if (!mSelector.equals(selector)) {
85            mSelector = selector;
86
87            Bundle args = getArguments();
88            if (args == null) {
89                args = new Bundle();
90            }
91            args.putBundle(ARGUMENT_SELECTOR, selector.asBundle());
92            setArguments(args);
93
94            MediaRouteChooserDialog dialog = (MediaRouteChooserDialog)getDialog();
95            if (dialog != null) {
96                dialog.setRouteSelector(selector);
97            }
98        }
99    }
100
101    /**
102     * Called when the chooser dialog is being created.
103     * <p>
104     * Subclasses may override this method to customize the dialog.
105     * </p>
106     */
107    public MediaRouteChooserDialog onCreateChooserDialog(
108            Context context, Bundle savedInstanceState) {
109        return new MediaRouteChooserDialog(context);
110    }
111
112    @Override
113    public Dialog onCreateDialog(Bundle savedInstanceState) {
114        mDialog = onCreateChooserDialog(getContext(), savedInstanceState);
115        mDialog.setRouteSelector(getRouteSelector());
116        return mDialog;
117    }
118
119    @Override
120    public void onConfigurationChanged(Configuration newConfig) {
121        super.onConfigurationChanged(newConfig);
122        if (mDialog != null) {
123            mDialog.updateLayout();
124        }
125    }
126}
127