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.graphics.drawable.Drawable;
22import android.os.Bundle;
23import android.support.v7.media.MediaRouteSelector;
24import android.support.v7.media.MediaRouter;
25import android.support.v7.mediarouter.R;
26import android.view.KeyEvent;
27import android.view.View;
28import android.view.Window;
29import android.widget.Button;
30import android.widget.FrameLayout;
31import android.widget.LinearLayout;
32import android.widget.SeekBar;
33
34/**
35 * This class implements the route controller dialog for {@link MediaRouter}.
36 * <p>
37 * This dialog allows the user to control or disconnect from the currently selected route.
38 * </p>
39 *
40 * @see MediaRouteButton
41 * @see MediaRouteActionProvider
42 */
43public class MediaRouteControllerDialog extends Dialog {
44    private static final String TAG = "MediaRouteControllerDialog";
45
46    private final MediaRouter mRouter;
47    private final MediaRouterCallback mCallback;
48    private final MediaRouter.RouteInfo mRoute;
49
50    private boolean mCreated;
51    private Drawable mMediaRouteConnectingDrawable;
52    private Drawable mMediaRouteOnDrawable;
53    private Drawable mCurrentIconDrawable;
54
55    private boolean mVolumeControlEnabled = true;
56    private LinearLayout mVolumeLayout;
57    private SeekBar mVolumeSlider;
58    private boolean mVolumeSliderTouched;
59
60    private View mControlView;
61
62    private Button mDisconnectButton;
63
64    public MediaRouteControllerDialog(Context context) {
65        this(context, 0);
66    }
67
68    public MediaRouteControllerDialog(Context context, int theme) {
69        super(MediaRouterThemeHelper.createThemedContext(context, true), theme);
70        context = getContext();
71
72        mRouter = MediaRouter.getInstance(context);
73        mCallback = new MediaRouterCallback();
74        mRoute = mRouter.getSelectedRoute();
75    }
76
77    /**
78     * Gets the route that this dialog is controlling.
79     */
80    public MediaRouter.RouteInfo getRoute() {
81        return mRoute;
82    }
83
84    /**
85     * Provides the subclass an opportunity to create a view that will
86     * be included within the body of the dialog to offer additional media controls
87     * for the currently playing content.
88     *
89     * @param savedInstanceState The dialog's saved instance state.
90     * @return The media control view, or null if none.
91     */
92    public View onCreateMediaControlView(Bundle savedInstanceState) {
93        return null;
94    }
95
96    /**
97     * Gets the media control view that was created by {@link #onCreateMediaControlView(Bundle)}.
98     *
99     * @return The media control view, or null if none.
100     */
101    public View getMediaControlView() {
102        return mControlView;
103    }
104
105    /**
106     * Sets whether to enable the volume slider and volume control using the volume keys
107     * when the route supports it.
108     * <p>
109     * The default value is true.
110     * </p>
111     */
112    public void setVolumeControlEnabled(boolean enable) {
113        if (mVolumeControlEnabled != enable) {
114            mVolumeControlEnabled = enable;
115            if (mCreated) {
116                updateVolume();
117            }
118        }
119    }
120
121    /**
122     * Returns whether to enable the volume slider and volume control using the volume keys
123     * when the route supports it.
124     */
125    public boolean isVolumeControlEnabled() {
126        return mVolumeControlEnabled;
127    }
128
129    @Override
130    protected void onCreate(Bundle savedInstanceState) {
131        super.onCreate(savedInstanceState);
132
133        getWindow().requestFeature(Window.FEATURE_LEFT_ICON);
134
135        setContentView(R.layout.mr_media_route_controller_dialog);
136
137        mVolumeLayout = (LinearLayout)findViewById(R.id.media_route_volume_layout);
138        mVolumeSlider = (SeekBar)findViewById(R.id.media_route_volume_slider);
139        mVolumeSlider.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
140            @Override
141            public void onStartTrackingTouch(SeekBar seekBar) {
142                mVolumeSliderTouched = true;
143            }
144
145            @Override
146            public void onStopTrackingTouch(SeekBar seekBar) {
147                mVolumeSliderTouched = false;
148                updateVolume();
149            }
150
151            @Override
152            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
153                if (fromUser) {
154                    mRoute.requestSetVolume(progress);
155                }
156            }
157        });
158
159        mDisconnectButton = (Button)findViewById(R.id.media_route_disconnect_button);
160        mDisconnectButton.setOnClickListener(new View.OnClickListener() {
161            @Override
162            public void onClick(View v) {
163                if (mRoute.isSelected()) {
164                    mRouter.getDefaultRoute().select();
165                }
166                dismiss();
167            }
168        });
169
170        mCreated = true;
171        if (update()) {
172            mControlView = onCreateMediaControlView(savedInstanceState);
173            FrameLayout controlFrame =
174                    (FrameLayout)findViewById(R.id.media_route_control_frame);
175            if (mControlView != null) {
176                controlFrame.addView(mControlView);
177                controlFrame.setVisibility(View.VISIBLE);
178            } else {
179                controlFrame.setVisibility(View.GONE);
180            }
181        }
182    }
183
184    @Override
185    public void onAttachedToWindow() {
186        super.onAttachedToWindow();
187
188        mRouter.addCallback(MediaRouteSelector.EMPTY, mCallback,
189                MediaRouter.CALLBACK_FLAG_UNFILTERED_EVENTS);
190        update();
191    }
192
193    @Override
194    public void onDetachedFromWindow() {
195        mRouter.removeCallback(mCallback);
196
197        super.onDetachedFromWindow();
198    }
199
200    @Override
201    public boolean onKeyDown(int keyCode, KeyEvent event) {
202        if (isVolumeControlAvailable()) {
203            if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
204                mRoute.requestUpdateVolume(-1);
205                return true;
206            } else if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
207                mRoute.requestUpdateVolume(1);
208                return true;
209            }
210        }
211        return super.onKeyDown(keyCode, event);
212    }
213
214    @Override
215    public boolean onKeyUp(int keyCode, KeyEvent event) {
216        if (isVolumeControlAvailable()) {
217            if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN
218                    || keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
219                return true;
220            }
221        }
222        return super.onKeyUp(keyCode, event);
223    }
224
225    private boolean update() {
226        if (!mRoute.isSelected() || mRoute.isDefault()) {
227            dismiss();
228            return false;
229        }
230
231        setTitle(mRoute.getName());
232        updateVolume();
233
234        Drawable icon = getIconDrawable();
235        if (icon != mCurrentIconDrawable) {
236            mCurrentIconDrawable = icon;
237
238            // There seems to be a bug in the framework where feature drawables
239            // will not start animating unless they experience a transition from
240            // invisible to visible.  So we force the drawable to be invisible here.
241            // The window will make the drawable visible when attached.
242            icon.setVisible(false, true);
243            getWindow().setFeatureDrawable(Window.FEATURE_LEFT_ICON, icon);
244        }
245        return true;
246    }
247
248    private Drawable getIconDrawable() {
249        if (mRoute.isConnecting()) {
250            if (mMediaRouteConnectingDrawable == null) {
251                mMediaRouteConnectingDrawable = MediaRouterThemeHelper.getThemeDrawable(
252                        getContext(), R.attr.mediaRouteConnectingDrawable);
253            }
254            return mMediaRouteConnectingDrawable;
255        } else {
256            if (mMediaRouteOnDrawable == null) {
257                mMediaRouteOnDrawable = MediaRouterThemeHelper.getThemeDrawable(
258                        getContext(), R.attr.mediaRouteOnDrawable);
259            }
260            return mMediaRouteOnDrawable;
261        }
262    }
263
264    private void updateVolume() {
265        if (!mVolumeSliderTouched) {
266            if (isVolumeControlAvailable()) {
267                mVolumeLayout.setVisibility(View.VISIBLE);
268                mVolumeSlider.setMax(mRoute.getVolumeMax());
269                mVolumeSlider.setProgress(mRoute.getVolume());
270            } else {
271                mVolumeLayout.setVisibility(View.GONE);
272            }
273        }
274    }
275
276    private boolean isVolumeControlAvailable() {
277        return mVolumeControlEnabled && mRoute.getVolumeHandling() ==
278                MediaRouter.RouteInfo.PLAYBACK_VOLUME_VARIABLE;
279    }
280
281    private final class MediaRouterCallback extends MediaRouter.Callback {
282        @Override
283        public void onRouteUnselected(MediaRouter router, MediaRouter.RouteInfo route) {
284            update();
285        }
286
287        @Override
288        public void onRouteChanged(MediaRouter router, MediaRouter.RouteInfo route) {
289            update();
290        }
291
292        @Override
293        public void onRouteVolumeChanged(MediaRouter router, MediaRouter.RouteInfo route) {
294            if (route == mRoute) {
295                updateVolume();
296            }
297        }
298    }
299}
300