Alexander Lucas | 97842ff | 2014-03-07 14:56:55 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2012 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 | package com.example.android.mediarouter.player; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.graphics.SurfaceTexture; |
| 21 | import android.hardware.display.DisplayManager; |
| 22 | import android.os.Build; |
| 23 | import android.util.DisplayMetrics; |
| 24 | import android.util.Log; |
| 25 | import android.view.Display; |
| 26 | import android.view.GestureDetector; |
| 27 | import android.view.Gravity; |
| 28 | import android.view.LayoutInflater; |
| 29 | import android.view.MotionEvent; |
| 30 | import android.view.ScaleGestureDetector; |
| 31 | import android.view.Surface; |
| 32 | import android.view.SurfaceHolder; |
| 33 | import android.view.SurfaceView; |
| 34 | import android.view.TextureView; |
| 35 | import android.view.TextureView.SurfaceTextureListener; |
| 36 | import android.view.View; |
| 37 | import android.view.WindowManager; |
| 38 | import android.widget.TextView; |
| 39 | |
| 40 | import com.example.android.mediarouter.R; |
| 41 | |
| 42 | /** |
| 43 | * Manages an overlay display window, used for simulating remote playback. |
| 44 | */ |
| 45 | public abstract class OverlayDisplayWindow { |
| 46 | private static final String TAG = "OverlayDisplayWindow"; |
| 47 | private static final boolean DEBUG = false; |
| 48 | |
| 49 | private static final float WINDOW_ALPHA = 0.8f; |
| 50 | private static final float INITIAL_SCALE = 0.5f; |
| 51 | private static final float MIN_SCALE = 0.3f; |
| 52 | private static final float MAX_SCALE = 1.0f; |
| 53 | |
| 54 | protected final Context mContext; |
| 55 | protected final String mName; |
| 56 | protected final int mWidth; |
| 57 | protected final int mHeight; |
| 58 | protected final int mGravity; |
| 59 | protected OverlayWindowListener mListener; |
| 60 | |
| 61 | protected OverlayDisplayWindow(Context context, String name, |
| 62 | int width, int height, int gravity) { |
| 63 | mContext = context; |
| 64 | mName = name; |
| 65 | mWidth = width; |
| 66 | mHeight = height; |
| 67 | mGravity = gravity; |
| 68 | } |
| 69 | |
| 70 | public static OverlayDisplayWindow create(Context context, String name, |
| 71 | int width, int height, int gravity) { |
| 72 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { |
| 73 | return new JellybeanMr1Impl(context, name, width, height, gravity); |
| 74 | } else { |
| 75 | return new LegacyImpl(context, name, width, height, gravity); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | public void setOverlayWindowListener(OverlayWindowListener listener) { |
| 80 | mListener = listener; |
| 81 | } |
| 82 | |
| 83 | public Context getContext() { |
| 84 | return mContext; |
| 85 | } |
| 86 | |
| 87 | public abstract void show(); |
| 88 | |
| 89 | public abstract void dismiss(); |
| 90 | |
| 91 | public abstract void updateAspectRatio(int width, int height); |
| 92 | |
| 93 | // Watches for significant changes in the overlay display window lifecycle. |
| 94 | public interface OverlayWindowListener { |
| 95 | public void onWindowCreated(Surface surface); |
| 96 | public void onWindowCreated(SurfaceHolder surfaceHolder); |
| 97 | public void onWindowDestroyed(); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Implementation for older versions. |
| 102 | */ |
| 103 | private static final class LegacyImpl extends OverlayDisplayWindow { |
| 104 | private final WindowManager mWindowManager; |
| 105 | |
| 106 | private boolean mWindowVisible; |
| 107 | private SurfaceView mSurfaceView; |
| 108 | |
| 109 | public LegacyImpl(Context context, String name, |
| 110 | int width, int height, int gravity) { |
| 111 | super(context, name, width, height, gravity); |
| 112 | |
| 113 | mWindowManager = (WindowManager)context.getSystemService( |
| 114 | Context.WINDOW_SERVICE); |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | public void show() { |
| 119 | if (!mWindowVisible) { |
| 120 | mSurfaceView = new SurfaceView(mContext); |
| 121 | |
| 122 | Display display = mWindowManager.getDefaultDisplay(); |
| 123 | |
| 124 | WindowManager.LayoutParams params = new WindowManager.LayoutParams( |
| 125 | WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); |
| 126 | params.flags |= WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |
| 127 | | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS |
| 128 | | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
| 129 | | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
| 130 | | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE; |
| 131 | params.alpha = WINDOW_ALPHA; |
| 132 | params.gravity = Gravity.LEFT | Gravity.BOTTOM; |
| 133 | params.setTitle(mName); |
| 134 | |
| 135 | int width = (int)(display.getWidth() * INITIAL_SCALE); |
| 136 | int height = (int)(display.getHeight() * INITIAL_SCALE); |
| 137 | if (mWidth > mHeight) { |
| 138 | height = mHeight * width / mWidth; |
| 139 | } else { |
| 140 | width = mWidth * height / mHeight; |
| 141 | } |
| 142 | params.width = width; |
| 143 | params.height = height; |
| 144 | |
| 145 | mWindowManager.addView(mSurfaceView, params); |
| 146 | mWindowVisible = true; |
| 147 | |
| 148 | SurfaceHolder holder = mSurfaceView.getHolder(); |
| 149 | holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); |
| 150 | mListener.onWindowCreated(holder); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | @Override |
| 155 | public void dismiss() { |
| 156 | if (mWindowVisible) { |
| 157 | mListener.onWindowDestroyed(); |
| 158 | |
| 159 | mWindowManager.removeView(mSurfaceView); |
| 160 | mWindowVisible = false; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | @Override |
| 165 | public void updateAspectRatio(int width, int height) { |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Implementation for API version 17+. |
| 171 | */ |
| 172 | private static final class JellybeanMr1Impl extends OverlayDisplayWindow { |
| 173 | // When true, disables support for moving and resizing the overlay. |
| 174 | // The window is made non-touchable, which makes it possible to |
| 175 | // directly interact with the content underneath. |
| 176 | private static final boolean DISABLE_MOVE_AND_RESIZE = false; |
| 177 | |
| 178 | private final DisplayManager mDisplayManager; |
| 179 | private final WindowManager mWindowManager; |
| 180 | |
| 181 | private final Display mDefaultDisplay; |
| 182 | private final DisplayMetrics mDefaultDisplayMetrics = new DisplayMetrics(); |
| 183 | |
| 184 | private View mWindowContent; |
| 185 | private WindowManager.LayoutParams mWindowParams; |
| 186 | private TextureView mTextureView; |
| 187 | private TextView mNameTextView; |
| 188 | |
| 189 | private GestureDetector mGestureDetector; |
| 190 | private ScaleGestureDetector mScaleGestureDetector; |
| 191 | |
| 192 | private boolean mWindowVisible; |
| 193 | private int mWindowX; |
| 194 | private int mWindowY; |
| 195 | private float mWindowScale; |
| 196 | |
| 197 | private float mLiveTranslationX; |
| 198 | private float mLiveTranslationY; |
| 199 | private float mLiveScale = 1.0f; |
| 200 | |
| 201 | public JellybeanMr1Impl(Context context, String name, |
| 202 | int width, int height, int gravity) { |
| 203 | super(context, name, width, height, gravity); |
| 204 | |
| 205 | mDisplayManager = (DisplayManager)context.getSystemService( |
| 206 | Context.DISPLAY_SERVICE); |
| 207 | mWindowManager = (WindowManager)context.getSystemService( |
| 208 | Context.WINDOW_SERVICE); |
| 209 | |
| 210 | mDefaultDisplay = mWindowManager.getDefaultDisplay(); |
| 211 | updateDefaultDisplayInfo(); |
| 212 | |
| 213 | createWindow(); |
| 214 | } |
| 215 | |
| 216 | @Override |
| 217 | public void show() { |
| 218 | if (!mWindowVisible) { |
| 219 | mDisplayManager.registerDisplayListener(mDisplayListener, null); |
| 220 | if (!updateDefaultDisplayInfo()) { |
| 221 | mDisplayManager.unregisterDisplayListener(mDisplayListener); |
| 222 | return; |
| 223 | } |
| 224 | |
| 225 | clearLiveState(); |
| 226 | updateWindowParams(); |
| 227 | mWindowManager.addView(mWindowContent, mWindowParams); |
| 228 | mWindowVisible = true; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | @Override |
| 233 | public void dismiss() { |
| 234 | if (mWindowVisible) { |
| 235 | mDisplayManager.unregisterDisplayListener(mDisplayListener); |
| 236 | mWindowManager.removeView(mWindowContent); |
| 237 | mWindowVisible = false; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | @Override |
| 242 | public void updateAspectRatio(int width, int height) { |
| 243 | if (mWidth * height < mHeight * width) { |
| 244 | mTextureView.getLayoutParams().width = mWidth; |
| 245 | mTextureView.getLayoutParams().height = mWidth * height / width; |
| 246 | } else { |
| 247 | mTextureView.getLayoutParams().width = mHeight * width / height; |
| 248 | mTextureView.getLayoutParams().height = mHeight; |
| 249 | } |
| 250 | relayout(); |
| 251 | } |
| 252 | |
| 253 | private void relayout() { |
| 254 | if (mWindowVisible) { |
| 255 | updateWindowParams(); |
| 256 | mWindowManager.updateViewLayout(mWindowContent, mWindowParams); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | private boolean updateDefaultDisplayInfo() { |
| 261 | mDefaultDisplay.getMetrics(mDefaultDisplayMetrics); |
| 262 | return true; |
| 263 | } |
| 264 | |
| 265 | private void createWindow() { |
| 266 | LayoutInflater inflater = LayoutInflater.from(mContext); |
| 267 | |
| 268 | mWindowContent = inflater.inflate( |
| 269 | R.layout.overlay_display_window, null); |
| 270 | mWindowContent.setOnTouchListener(mOnTouchListener); |
| 271 | |
| 272 | mTextureView = (TextureView)mWindowContent.findViewById( |
| 273 | R.id.overlay_display_window_texture); |
| 274 | mTextureView.setPivotX(0); |
| 275 | mTextureView.setPivotY(0); |
| 276 | mTextureView.getLayoutParams().width = mWidth; |
| 277 | mTextureView.getLayoutParams().height = mHeight; |
| 278 | mTextureView.setOpaque(false); |
| 279 | mTextureView.setSurfaceTextureListener(mSurfaceTextureListener); |
| 280 | |
| 281 | mNameTextView = (TextView)mWindowContent.findViewById( |
| 282 | R.id.overlay_display_window_title); |
| 283 | mNameTextView.setText(mName); |
| 284 | |
| 285 | mWindowParams = new WindowManager.LayoutParams( |
| 286 | WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); |
| 287 | mWindowParams.flags |= WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |
| 288 | | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS |
| 289 | | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
| 290 | | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
| 291 | | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED; |
| 292 | if (DISABLE_MOVE_AND_RESIZE) { |
| 293 | mWindowParams.flags |= WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE; |
| 294 | } |
| 295 | mWindowParams.alpha = WINDOW_ALPHA; |
| 296 | mWindowParams.gravity = Gravity.TOP | Gravity.LEFT; |
| 297 | mWindowParams.setTitle(mName); |
| 298 | |
| 299 | mGestureDetector = new GestureDetector(mContext, mOnGestureListener); |
| 300 | mScaleGestureDetector = new ScaleGestureDetector(mContext, mOnScaleGestureListener); |
| 301 | |
| 302 | // Set the initial position and scale. |
| 303 | // The position and scale will be clamped when the display is first shown. |
| 304 | mWindowX = (mGravity & Gravity.LEFT) == Gravity.LEFT ? |
| 305 | 0 : mDefaultDisplayMetrics.widthPixels; |
| 306 | mWindowY = (mGravity & Gravity.TOP) == Gravity.TOP ? |
| 307 | 0 : mDefaultDisplayMetrics.heightPixels; |
| 308 | Log.d(TAG, mDefaultDisplayMetrics.toString()); |
| 309 | mWindowScale = INITIAL_SCALE; |
| 310 | |
| 311 | // calculate and save initial settings |
| 312 | updateWindowParams(); |
| 313 | saveWindowParams(); |
| 314 | } |
| 315 | |
| 316 | private void updateWindowParams() { |
| 317 | float scale = mWindowScale * mLiveScale; |
| 318 | scale = Math.min(scale, (float)mDefaultDisplayMetrics.widthPixels / mWidth); |
| 319 | scale = Math.min(scale, (float)mDefaultDisplayMetrics.heightPixels / mHeight); |
| 320 | scale = Math.max(MIN_SCALE, Math.min(MAX_SCALE, scale)); |
| 321 | |
| 322 | float offsetScale = (scale / mWindowScale - 1.0f) * 0.5f; |
| 323 | int width = (int)(mWidth * scale); |
| 324 | int height = (int)(mHeight * scale); |
| 325 | int x = (int)(mWindowX + mLiveTranslationX - width * offsetScale); |
| 326 | int y = (int)(mWindowY + mLiveTranslationY - height * offsetScale); |
| 327 | x = Math.max(0, Math.min(x, mDefaultDisplayMetrics.widthPixels - width)); |
| 328 | y = Math.max(0, Math.min(y, mDefaultDisplayMetrics.heightPixels - height)); |
| 329 | |
| 330 | if (DEBUG) { |
| 331 | Log.d(TAG, "updateWindowParams: scale=" + scale |
| 332 | + ", offsetScale=" + offsetScale |
| 333 | + ", x=" + x + ", y=" + y |
| 334 | + ", width=" + width + ", height=" + height); |
| 335 | } |
| 336 | |
| 337 | mTextureView.setScaleX(scale); |
| 338 | mTextureView.setScaleY(scale); |
| 339 | |
| 340 | mTextureView.setTranslationX( |
| 341 | (mWidth - mTextureView.getLayoutParams().width) * scale / 2); |
| 342 | mTextureView.setTranslationY( |
| 343 | (mHeight - mTextureView.getLayoutParams().height) * scale / 2); |
| 344 | |
| 345 | mWindowParams.x = x; |
| 346 | mWindowParams.y = y; |
| 347 | mWindowParams.width = width; |
| 348 | mWindowParams.height = height; |
| 349 | } |
| 350 | |
| 351 | private void saveWindowParams() { |
| 352 | mWindowX = mWindowParams.x; |
| 353 | mWindowY = mWindowParams.y; |
| 354 | mWindowScale = mTextureView.getScaleX(); |
| 355 | clearLiveState(); |
| 356 | } |
| 357 | |
| 358 | private void clearLiveState() { |
| 359 | mLiveTranslationX = 0f; |
| 360 | mLiveTranslationY = 0f; |
| 361 | mLiveScale = 1.0f; |
| 362 | } |
| 363 | |
| 364 | private final DisplayManager.DisplayListener mDisplayListener = |
| 365 | new DisplayManager.DisplayListener() { |
| 366 | @Override |
| 367 | public void onDisplayAdded(int displayId) { |
| 368 | } |
| 369 | |
| 370 | @Override |
| 371 | public void onDisplayChanged(int displayId) { |
| 372 | if (displayId == mDefaultDisplay.getDisplayId()) { |
| 373 | if (updateDefaultDisplayInfo()) { |
| 374 | relayout(); |
| 375 | } else { |
| 376 | dismiss(); |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | @Override |
| 382 | public void onDisplayRemoved(int displayId) { |
| 383 | if (displayId == mDefaultDisplay.getDisplayId()) { |
| 384 | dismiss(); |
| 385 | } |
| 386 | } |
| 387 | }; |
| 388 | |
| 389 | private final SurfaceTextureListener mSurfaceTextureListener = |
| 390 | new SurfaceTextureListener() { |
| 391 | @Override |
| 392 | public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, |
| 393 | int width, int height) { |
| 394 | if (mListener != null) { |
| 395 | mListener.onWindowCreated(new Surface(surfaceTexture)); |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | @Override |
| 400 | public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) { |
| 401 | if (mListener != null) { |
| 402 | mListener.onWindowDestroyed(); |
| 403 | } |
| 404 | return true; |
| 405 | } |
| 406 | |
| 407 | @Override |
| 408 | public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, |
| 409 | int width, int height) { |
| 410 | } |
| 411 | |
| 412 | @Override |
| 413 | public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) { |
| 414 | } |
| 415 | }; |
| 416 | |
| 417 | private final View.OnTouchListener mOnTouchListener = new View.OnTouchListener() { |
| 418 | @Override |
| 419 | public boolean onTouch(View view, MotionEvent event) { |
| 420 | // Work in screen coordinates. |
| 421 | final float oldX = event.getX(); |
| 422 | final float oldY = event.getY(); |
| 423 | event.setLocation(event.getRawX(), event.getRawY()); |
| 424 | |
| 425 | mGestureDetector.onTouchEvent(event); |
| 426 | mScaleGestureDetector.onTouchEvent(event); |
| 427 | |
| 428 | switch (event.getActionMasked()) { |
| 429 | case MotionEvent.ACTION_UP: |
| 430 | case MotionEvent.ACTION_CANCEL: |
| 431 | saveWindowParams(); |
| 432 | break; |
| 433 | } |
| 434 | |
| 435 | // Revert to window coordinates. |
| 436 | event.setLocation(oldX, oldY); |
| 437 | return true; |
| 438 | } |
| 439 | }; |
| 440 | |
| 441 | private final GestureDetector.OnGestureListener mOnGestureListener = |
| 442 | new GestureDetector.SimpleOnGestureListener() { |
| 443 | @Override |
| 444 | public boolean onScroll(MotionEvent e1, MotionEvent e2, |
| 445 | float distanceX, float distanceY) { |
| 446 | mLiveTranslationX -= distanceX; |
| 447 | mLiveTranslationY -= distanceY; |
| 448 | relayout(); |
| 449 | return true; |
| 450 | } |
| 451 | }; |
| 452 | |
| 453 | private final ScaleGestureDetector.OnScaleGestureListener mOnScaleGestureListener = |
| 454 | new ScaleGestureDetector.SimpleOnScaleGestureListener() { |
| 455 | @Override |
| 456 | public boolean onScale(ScaleGestureDetector detector) { |
| 457 | mLiveScale *= detector.getScaleFactor(); |
| 458 | relayout(); |
| 459 | return true; |
| 460 | } |
| 461 | }; |
| 462 | } |
| 463 | } |