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 com.android.internal.app;
18
19import com.android.internal.R;
20
21import android.app.AlertDialog;
22import android.app.MediaRouteActionProvider;
23import android.app.MediaRouteButton;
24import android.content.Context;
25import android.content.DialogInterface;
26import android.content.res.Resources;
27import android.content.res.TypedArray;
28import android.graphics.drawable.AnimationDrawable;
29import android.graphics.drawable.Drawable;
30import android.graphics.drawable.StateListDrawable;
31import android.media.MediaRouter;
32import android.media.MediaRouter.RouteGroup;
33import android.media.MediaRouter.RouteInfo;
34import android.os.Bundle;
35import android.util.TypedValue;
36import android.view.KeyEvent;
37import android.view.View;
38import android.widget.FrameLayout;
39import android.widget.LinearLayout;
40import android.widget.SeekBar;
41
42/**
43 * This class implements the route controller dialog for {@link MediaRouter}.
44 * <p>
45 * This dialog allows the user to control or disconnect from the currently selected route.
46 * </p>
47 *
48 * @see MediaRouteButton
49 * @see MediaRouteActionProvider
50 *
51 * TODO: Move this back into the API, as in the support library media router.
52 */
53public class MediaRouteControllerDialog extends AlertDialog {
54    // Time to wait before updating the volume when the user lets go of the seek bar
55    // to allow the route provider time to propagate the change and publish a new
56    // route descriptor.
57    private static final int VOLUME_UPDATE_DELAY_MILLIS = 250;
58
59    private final MediaRouter mRouter;
60    private final MediaRouterCallback mCallback;
61    private final MediaRouter.RouteInfo mRoute;
62
63    private boolean mCreated;
64    private Drawable mMediaRouteButtonDrawable;
65    private int[] mMediaRouteConnectingState = { R.attr.state_checked, R.attr.state_enabled };
66    private int[] mMediaRouteOnState = { R.attr.state_activated, R.attr.state_enabled };
67    private Drawable mCurrentIconDrawable;
68
69    private boolean mVolumeControlEnabled = true;
70    private LinearLayout mVolumeLayout;
71    private SeekBar mVolumeSlider;
72    private boolean mVolumeSliderTouched;
73
74    private View mControlView;
75
76    public MediaRouteControllerDialog(Context context, int theme) {
77        super(context, theme);
78
79        mRouter = (MediaRouter) context.getSystemService(Context.MEDIA_ROUTER_SERVICE);
80        mCallback = new MediaRouterCallback();
81        mRoute = mRouter.getSelectedRoute();
82    }
83
84    /**
85     * Gets the route that this dialog is controlling.
86     */
87    public MediaRouter.RouteInfo getRoute() {
88        return mRoute;
89    }
90
91    /**
92     * Provides the subclass an opportunity to create a view that will
93     * be included within the body of the dialog to offer additional media controls
94     * for the currently playing content.
95     *
96     * @param savedInstanceState The dialog's saved instance state.
97     * @return The media control view, or null if none.
98     */
99    public View onCreateMediaControlView(Bundle savedInstanceState) {
100        return null;
101    }
102
103    /**
104     * Gets the media control view that was created by {@link #onCreateMediaControlView(Bundle)}.
105     *
106     * @return The media control view, or null if none.
107     */
108    public View getMediaControlView() {
109        return mControlView;
110    }
111
112    /**
113     * Sets whether to enable the volume slider and volume control using the volume keys
114     * when the route supports it.
115     * <p>
116     * The default value is true.
117     * </p>
118     */
119    public void setVolumeControlEnabled(boolean enable) {
120        if (mVolumeControlEnabled != enable) {
121            mVolumeControlEnabled = enable;
122            if (mCreated) {
123                updateVolume();
124            }
125        }
126    }
127
128    /**
129     * Returns whether to enable the volume slider and volume control using the volume keys
130     * when the route supports it.
131     */
132    public boolean isVolumeControlEnabled() {
133        return mVolumeControlEnabled;
134    }
135
136    @Override
137    protected void onCreate(Bundle savedInstanceState) {
138        setTitle(mRoute.getName());
139        Resources res = getContext().getResources();
140        setButton(BUTTON_NEGATIVE, res.getString(R.string.media_route_controller_disconnect),
141                new OnClickListener() {
142                    @Override
143                    public void onClick(DialogInterface dialogInterface, int id) {
144                        if (mRoute.isSelected()) {
145                            mRouter.getDefaultRoute().select();
146                        }
147                        dismiss();
148                    }
149                });
150        View customView = getLayoutInflater().inflate(R.layout.media_route_controller_dialog, null);
151        setView(customView, 0, 0, 0, 0);
152        super.onCreate(savedInstanceState);
153
154        View customPanelView = getWindow().findViewById(R.id.customPanel);
155        if (customPanelView != null) {
156            customPanelView.setMinimumHeight(0);
157        }
158        mVolumeLayout = (LinearLayout) customView.findViewById(R.id.media_route_volume_layout);
159        mVolumeSlider = (SeekBar) customView.findViewById(R.id.media_route_volume_slider);
160        mVolumeSlider.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
161            private final Runnable mStopTrackingTouch = new Runnable() {
162                @Override
163                public void run() {
164                    if (mVolumeSliderTouched) {
165                        mVolumeSliderTouched = false;
166                        updateVolume();
167                    }
168                }
169            };
170
171            @Override
172            public void onStartTrackingTouch(SeekBar seekBar) {
173                if (mVolumeSliderTouched) {
174                    mVolumeSlider.removeCallbacks(mStopTrackingTouch);
175                } else {
176                    mVolumeSliderTouched = true;
177                }
178            }
179
180            @Override
181            public void onStopTrackingTouch(SeekBar seekBar) {
182                // Defer resetting mVolumeSliderTouched to allow the media route provider
183                // a little time to settle into its new state and publish the final
184                // volume update.
185                mVolumeSlider.postDelayed(mStopTrackingTouch, VOLUME_UPDATE_DELAY_MILLIS);
186            }
187
188            @Override
189            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
190                if (fromUser) {
191                    mRoute.requestSetVolume(progress);
192                }
193            }
194        });
195
196        mMediaRouteButtonDrawable = obtainMediaRouteButtonDrawable();
197        mCreated = true;
198        if (update()) {
199            mControlView = onCreateMediaControlView(savedInstanceState);
200            FrameLayout controlFrame =
201                    (FrameLayout) customView.findViewById(R.id.media_route_control_frame);
202            if (mControlView != null) {
203                controlFrame.addView(mControlView);
204                controlFrame.setVisibility(View.VISIBLE);
205            } else {
206                controlFrame.setVisibility(View.GONE);
207            }
208        }
209    }
210
211    @Override
212    public void onAttachedToWindow() {
213        super.onAttachedToWindow();
214
215        mRouter.addCallback(0, mCallback, MediaRouter.CALLBACK_FLAG_UNFILTERED_EVENTS);
216        update();
217    }
218
219    @Override
220    public void onDetachedFromWindow() {
221        mRouter.removeCallback(mCallback);
222
223        super.onDetachedFromWindow();
224    }
225
226    @Override
227    public boolean onKeyDown(int keyCode, KeyEvent event) {
228        if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN
229                || keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
230            mRoute.requestUpdateVolume(keyCode == KeyEvent.KEYCODE_VOLUME_DOWN ? -1 : 1);
231            return true;
232        }
233        return super.onKeyDown(keyCode, event);
234    }
235
236    @Override
237    public boolean onKeyUp(int keyCode, KeyEvent event) {
238        if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN
239                || keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
240            return true;
241        }
242        return super.onKeyUp(keyCode, event);
243    }
244
245    private boolean update() {
246        if (!mRoute.isSelected() || mRoute.isDefault()) {
247            dismiss();
248            return false;
249        }
250
251        setTitle(mRoute.getName());
252        updateVolume();
253
254        Drawable icon = getIconDrawable();
255        if (icon != mCurrentIconDrawable) {
256            mCurrentIconDrawable = icon;
257            if (icon instanceof AnimationDrawable) {
258                AnimationDrawable animDrawable = (AnimationDrawable) icon;
259                if (!animDrawable.isRunning()) {
260                    animDrawable.start();
261                }
262            }
263            setIcon(icon);
264        }
265        return true;
266    }
267
268    private Drawable obtainMediaRouteButtonDrawable() {
269        Context context = getContext();
270        TypedValue value = new TypedValue();
271        if (!context.getTheme().resolveAttribute(R.attr.mediaRouteButtonStyle, value, true)) {
272            return null;
273        }
274        int[] drawableAttrs = new int[] { R.attr.externalRouteEnabledDrawable };
275        TypedArray a = context.obtainStyledAttributes(value.data, drawableAttrs);
276        Drawable drawable = a.getDrawable(0);
277        a.recycle();
278        return drawable;
279    }
280
281    private Drawable getIconDrawable() {
282        if (!(mMediaRouteButtonDrawable instanceof StateListDrawable)) {
283            return mMediaRouteButtonDrawable;
284        } else if (mRoute.isConnecting()) {
285            StateListDrawable stateListDrawable = (StateListDrawable) mMediaRouteButtonDrawable;
286            stateListDrawable.setState(mMediaRouteConnectingState);
287            return stateListDrawable.getCurrent();
288        } else {
289            StateListDrawable stateListDrawable = (StateListDrawable) mMediaRouteButtonDrawable;
290            stateListDrawable.setState(mMediaRouteOnState);
291            return stateListDrawable.getCurrent();
292        }
293    }
294
295    private void updateVolume() {
296        if (!mVolumeSliderTouched) {
297            if (isVolumeControlAvailable()) {
298                mVolumeLayout.setVisibility(View.VISIBLE);
299                mVolumeSlider.setMax(mRoute.getVolumeMax());
300                mVolumeSlider.setProgress(mRoute.getVolume());
301            } else {
302                mVolumeLayout.setVisibility(View.GONE);
303            }
304        }
305    }
306
307    private boolean isVolumeControlAvailable() {
308        return mVolumeControlEnabled && mRoute.getVolumeHandling() ==
309                MediaRouter.RouteInfo.PLAYBACK_VOLUME_VARIABLE;
310    }
311
312    private final class MediaRouterCallback extends MediaRouter.SimpleCallback {
313        @Override
314        public void onRouteUnselected(MediaRouter router, int type, RouteInfo info) {
315            update();
316        }
317
318        @Override
319        public void onRouteChanged(MediaRouter router, MediaRouter.RouteInfo route) {
320            update();
321        }
322
323        @Override
324        public void onRouteVolumeChanged(MediaRouter router, MediaRouter.RouteInfo route) {
325            if (route == mRoute) {
326                updateVolume();
327            }
328        }
329
330        @Override
331        public void onRouteGrouped(MediaRouter router, RouteInfo info, RouteGroup group,
332                int index) {
333            update();
334        }
335
336        @Override
337        public void onRouteUngrouped(MediaRouter router, RouteInfo info, RouteGroup group) {
338            update();
339        }
340    }
341}
342