chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 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.android.systemui.accessibility; |
| 18 | |
Jacky Kao | 15b5105 | 2019-12-20 08:17:52 +0800 | [diff] [blame] | 19 | import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES; |
| 20 | |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 21 | import android.content.Context; |
| 22 | import android.content.res.Resources; |
| 23 | import android.graphics.PixelFormat; |
| 24 | import android.graphics.Point; |
| 25 | import android.graphics.PointF; |
| 26 | import android.graphics.Rect; |
| 27 | import android.os.Binder; |
| 28 | import android.os.Handler; |
| 29 | import android.view.Display; |
| 30 | import android.view.Gravity; |
| 31 | import android.view.LayoutInflater; |
| 32 | import android.view.MotionEvent; |
| 33 | import android.view.Surface; |
| 34 | import android.view.SurfaceControl; |
| 35 | import android.view.SurfaceHolder; |
| 36 | import android.view.SurfaceView; |
| 37 | import android.view.View; |
| 38 | import android.view.ViewTreeObserver; |
| 39 | import android.view.WindowManager; |
| 40 | |
| 41 | import com.android.systemui.R; |
| 42 | import com.android.systemui.shared.system.WindowManagerWrapper; |
| 43 | |
| 44 | /** |
| 45 | * Class to handle adding and removing a window magnification. |
| 46 | */ |
| 47 | public class WindowMagnificationController implements View.OnClickListener, |
| 48 | View.OnLongClickListener, View.OnTouchListener, SurfaceHolder.Callback { |
| 49 | private final int mBorderSize; |
| 50 | private final int mMoveFrameAmountShort; |
| 51 | private final int mMoveFrameAmountLong; |
| 52 | |
| 53 | private final Context mContext; |
| 54 | private final Point mDisplaySize = new Point(); |
| 55 | private final int mDisplayId; |
| 56 | private final Handler mHandler; |
| 57 | private final Rect mMagnificationFrame = new Rect(); |
| 58 | private final SurfaceControl.Transaction mTransaction = new SurfaceControl.Transaction(); |
| 59 | |
| 60 | private final WindowManager mWm; |
| 61 | |
| 62 | private float mScale; |
| 63 | |
| 64 | private final Rect mTmpRect = new Rect(); |
| 65 | |
| 66 | // The root of the mirrored content |
| 67 | private SurfaceControl mMirrorSurface; |
| 68 | |
| 69 | private boolean mIsPressedDown; |
| 70 | |
| 71 | private View mLeftControl; |
| 72 | private View mUpControl; |
| 73 | private View mRightControl; |
| 74 | private View mBottomControl; |
| 75 | |
| 76 | private View mDragView; |
| 77 | private View mLeftDrag; |
| 78 | private View mTopDrag; |
| 79 | private View mRightDrag; |
| 80 | private View mBottomDrag; |
| 81 | |
| 82 | private final PointF mLastDrag = new PointF(); |
| 83 | private final Point mMoveWindowOffset = new Point(); |
| 84 | |
| 85 | private View mMirrorView; |
| 86 | private SurfaceView mMirrorSurfaceView; |
| 87 | private View mControlsView; |
| 88 | private View mOverlayView; |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 89 | // The boundary of magnification frame. |
| 90 | private final Rect mMagnificationFrameBoundary = new Rect(); |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 91 | |
| 92 | private MoveMirrorRunnable mMoveMirrorRunnable = new MoveMirrorRunnable(); |
| 93 | |
| 94 | WindowMagnificationController(Context context, Handler handler) { |
| 95 | mContext = context; |
| 96 | mHandler = handler; |
| 97 | Display display = mContext.getDisplay(); |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 98 | display.getRealSize(mDisplaySize); |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 99 | mDisplayId = mContext.getDisplayId(); |
| 100 | |
| 101 | mWm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); |
| 102 | |
| 103 | Resources r = context.getResources(); |
| 104 | mBorderSize = (int) r.getDimension(R.dimen.magnification_border_size); |
| 105 | mMoveFrameAmountShort = (int) r.getDimension(R.dimen.magnification_frame_move_short); |
| 106 | mMoveFrameAmountLong = (int) r.getDimension(R.dimen.magnification_frame_move_long); |
| 107 | |
| 108 | mScale = r.getInteger(R.integer.magnification_default_scale); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Creates a magnification window if it doesn't already exist. |
| 113 | */ |
| 114 | void createWindowMagnification() { |
| 115 | if (mMirrorView != null) { |
| 116 | return; |
| 117 | } |
mincheli | 5fbfc53 | 2019-12-24 21:02:06 +0800 | [diff] [blame] | 118 | setInitialStartBounds(); |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 119 | setMagnificationFrameBoundary(); |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 120 | createOverlayWindow(); |
| 121 | } |
| 122 | |
| 123 | private void createOverlayWindow() { |
| 124 | WindowManager.LayoutParams params = new WindowManager.LayoutParams( |
| 125 | WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT, |
| 126 | WindowManager.LayoutParams.TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY, |
| 127 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE |
| 128 | | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, |
| 129 | PixelFormat.TRANSPARENT); |
| 130 | params.gravity = Gravity.TOP | Gravity.LEFT; |
| 131 | params.token = new Binder(); |
| 132 | params.setTitle(mContext.getString(R.string.magnification_overlay_title)); |
| 133 | |
| 134 | mOverlayView = new View(mContext); |
| 135 | mOverlayView.getViewTreeObserver().addOnWindowAttachListener( |
| 136 | new ViewTreeObserver.OnWindowAttachListener() { |
| 137 | @Override |
| 138 | public void onWindowAttached() { |
| 139 | mOverlayView.getViewTreeObserver().removeOnWindowAttachListener(this); |
| 140 | createMirrorWindow(); |
| 141 | createControls(); |
| 142 | } |
| 143 | |
| 144 | @Override |
| 145 | public void onWindowDetached() { |
| 146 | |
| 147 | } |
| 148 | }); |
| 149 | |
| 150 | mOverlayView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
| 151 | | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
| 152 | | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
| 153 | | View.SYSTEM_UI_FLAG_FULLSCREEN |
| 154 | | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY |
| 155 | | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION); |
| 156 | |
| 157 | mWm.addView(mOverlayView, params); |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Deletes the magnification window. |
| 162 | */ |
| 163 | void deleteWindowMagnification() { |
| 164 | if (mMirrorSurface != null) { |
| 165 | mTransaction.remove(mMirrorSurface).apply(); |
| 166 | mMirrorSurface = null; |
| 167 | } |
| 168 | |
| 169 | if (mOverlayView != null) { |
| 170 | mWm.removeView(mOverlayView); |
| 171 | mOverlayView = null; |
| 172 | } |
| 173 | |
| 174 | if (mMirrorView != null) { |
| 175 | mWm.removeView(mMirrorView); |
| 176 | mMirrorView = null; |
| 177 | } |
| 178 | |
| 179 | if (mControlsView != null) { |
| 180 | mWm.removeView(mControlsView); |
| 181 | mControlsView = null; |
| 182 | } |
| 183 | } |
| 184 | |
mincheli | 5fbfc53 | 2019-12-24 21:02:06 +0800 | [diff] [blame] | 185 | /** |
| 186 | * Called when the configuration has changed, and it updates window magnification UI. |
| 187 | * |
| 188 | * @param configDiff a bit mask of the differences between the configurations |
| 189 | */ |
| 190 | void onConfigurationChanged(int configDiff) { |
| 191 | // TODO(b/145780606): update toggle button UI. |
| 192 | if (mMirrorView != null) { |
| 193 | mWm.removeView(mMirrorView); |
| 194 | createMirrorWindow(); |
| 195 | } |
| 196 | } |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 197 | |
mincheli | 5fbfc53 | 2019-12-24 21:02:06 +0800 | [diff] [blame] | 198 | private void createMirrorWindow() { |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 199 | // The window should be the size the mirrored surface will be but also add room for the |
| 200 | // border and the drag handle. |
| 201 | int dragViewHeight = (int) mContext.getResources().getDimension( |
| 202 | R.dimen.magnification_drag_view_height); |
| 203 | int windowWidth = mMagnificationFrame.width() + 2 * mBorderSize; |
| 204 | int windowHeight = mMagnificationFrame.height() + dragViewHeight + 2 * mBorderSize; |
| 205 | |
| 206 | WindowManager.LayoutParams params = new WindowManager.LayoutParams( |
| 207 | windowWidth, windowHeight, |
| 208 | WindowManager.LayoutParams.TYPE_APPLICATION_PANEL, |
| 209 | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
| 210 | | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, |
| 211 | PixelFormat.TRANSPARENT); |
| 212 | params.gravity = Gravity.TOP | Gravity.LEFT; |
| 213 | params.token = mOverlayView.getWindowToken(); |
| 214 | params.x = mMagnificationFrame.left; |
| 215 | params.y = mMagnificationFrame.top; |
Jacky Kao | 15b5105 | 2019-12-20 08:17:52 +0800 | [diff] [blame] | 216 | params.layoutInDisplayCutoutMode = LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES; |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 217 | params.setTitle(mContext.getString(R.string.magnification_window_title)); |
| 218 | |
| 219 | mMirrorView = LayoutInflater.from(mContext).inflate(R.layout.window_magnifier_view, null); |
| 220 | mMirrorSurfaceView = mMirrorView.findViewById(R.id.surface_view); |
| 221 | // This places the SurfaceView's SurfaceControl above the ViewRootImpl's SurfaceControl to |
| 222 | // ensure the mirrored area can get touch instead of going to the window |
| 223 | mMirrorSurfaceView.setZOrderOnTop(true); |
| 224 | |
| 225 | mMirrorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
| 226 | | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
| 227 | | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
| 228 | | View.SYSTEM_UI_FLAG_FULLSCREEN |
| 229 | | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY |
| 230 | | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION); |
| 231 | mWm.addView(mMirrorView, params); |
| 232 | |
| 233 | SurfaceHolder holder = mMirrorSurfaceView.getHolder(); |
| 234 | holder.addCallback(this); |
| 235 | holder.setFormat(PixelFormat.RGBA_8888); |
| 236 | |
| 237 | addDragTouchListeners(); |
| 238 | } |
| 239 | |
| 240 | private void createControls() { |
| 241 | int controlsSize = (int) mContext.getResources().getDimension( |
| 242 | R.dimen.magnification_controls_size); |
| 243 | |
| 244 | WindowManager.LayoutParams lp = new WindowManager.LayoutParams(controlsSize, controlsSize, |
| 245 | WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL, |
| 246 | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
| 247 | | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, |
| 248 | PixelFormat.RGBA_8888); |
| 249 | lp.gravity = Gravity.BOTTOM | Gravity.RIGHT; |
| 250 | lp.token = mOverlayView.getWindowToken(); |
| 251 | lp.setTitle(mContext.getString(R.string.magnification_controls_title)); |
| 252 | |
| 253 | mControlsView = LayoutInflater.from(mContext).inflate(R.layout.magnifier_controllers, null); |
| 254 | mWm.addView(mControlsView, lp); |
| 255 | |
| 256 | mLeftControl = mControlsView.findViewById(R.id.left_control); |
| 257 | mUpControl = mControlsView.findViewById(R.id.up_control); |
| 258 | mRightControl = mControlsView.findViewById(R.id.right_control); |
| 259 | mBottomControl = mControlsView.findViewById(R.id.down_control); |
| 260 | |
| 261 | mLeftControl.setOnClickListener(this); |
| 262 | mUpControl.setOnClickListener(this); |
| 263 | mRightControl.setOnClickListener(this); |
| 264 | mBottomControl.setOnClickListener(this); |
| 265 | |
| 266 | mLeftControl.setOnLongClickListener(this); |
| 267 | mUpControl.setOnLongClickListener(this); |
| 268 | mRightControl.setOnLongClickListener(this); |
| 269 | mBottomControl.setOnLongClickListener(this); |
| 270 | |
| 271 | mLeftControl.setOnTouchListener(this); |
| 272 | mUpControl.setOnTouchListener(this); |
| 273 | mRightControl.setOnTouchListener(this); |
| 274 | mBottomControl.setOnTouchListener(this); |
| 275 | } |
| 276 | |
| 277 | private void setInitialStartBounds() { |
| 278 | // Sets the initial frame area for the mirror and places it in the center of the display. |
| 279 | int initSize = Math.min(mDisplaySize.x, mDisplaySize.y) / 2; |
| 280 | int initX = mDisplaySize.x / 2 - initSize / 2; |
| 281 | int initY = mDisplaySize.y / 2 - initSize / 2; |
| 282 | mMagnificationFrame.set(initX, initY, initX + initSize, initY + initSize); |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * This is called once the surfaceView is created so the mirrored content can be placed as a |
| 287 | * child of the surfaceView. |
| 288 | */ |
| 289 | private void createMirror() { |
| 290 | mMirrorSurface = WindowManagerWrapper.getInstance().mirrorDisplay(mDisplayId); |
| 291 | if (!mMirrorSurface.isValid()) { |
| 292 | return; |
| 293 | } |
| 294 | mTransaction.show(mMirrorSurface) |
| 295 | .reparent(mMirrorSurface, mMirrorSurfaceView.getSurfaceControl()); |
| 296 | |
| 297 | modifyWindowMagnification(mTransaction); |
| 298 | mTransaction.apply(); |
| 299 | } |
| 300 | |
| 301 | private void addDragTouchListeners() { |
| 302 | mDragView = mMirrorView.findViewById(R.id.drag_handle); |
| 303 | mLeftDrag = mMirrorView.findViewById(R.id.left_handle); |
| 304 | mTopDrag = mMirrorView.findViewById(R.id.top_handle); |
| 305 | mRightDrag = mMirrorView.findViewById(R.id.right_handle); |
| 306 | mBottomDrag = mMirrorView.findViewById(R.id.bottom_handle); |
| 307 | |
| 308 | mDragView.setOnTouchListener(this); |
| 309 | mLeftDrag.setOnTouchListener(this); |
| 310 | mTopDrag.setOnTouchListener(this); |
| 311 | mRightDrag.setOnTouchListener(this); |
| 312 | mBottomDrag.setOnTouchListener(this); |
| 313 | } |
| 314 | |
| 315 | /** |
| 316 | * Modifies the placement of the mirrored content. |
| 317 | */ |
| 318 | private void modifyWindowMagnification(SurfaceControl.Transaction t) { |
| 319 | Rect sourceBounds = getSourceBounds(mMagnificationFrame, mScale); |
| 320 | // The final destination for the magnification surface should be at 0,0 since the |
| 321 | // ViewRootImpl's position will change |
| 322 | mTmpRect.set(0, 0, mMagnificationFrame.width(), mMagnificationFrame.height()); |
| 323 | |
| 324 | WindowManager.LayoutParams params = |
| 325 | (WindowManager.LayoutParams) mMirrorView.getLayoutParams(); |
| 326 | params.x = mMagnificationFrame.left; |
| 327 | params.y = mMagnificationFrame.top; |
| 328 | mWm.updateViewLayout(mMirrorView, params); |
| 329 | |
| 330 | t.setGeometry(mMirrorSurface, sourceBounds, mTmpRect, Surface.ROTATION_0); |
| 331 | } |
| 332 | |
| 333 | @Override |
| 334 | public void onClick(View v) { |
| 335 | setMoveOffset(v, mMoveFrameAmountShort); |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 336 | moveMirrorWindow(mMoveWindowOffset.x, mMoveWindowOffset.y); |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | @Override |
| 340 | public boolean onLongClick(View v) { |
| 341 | mIsPressedDown = true; |
| 342 | setMoveOffset(v, mMoveFrameAmountLong); |
| 343 | mHandler.post(mMoveMirrorRunnable); |
| 344 | return true; |
| 345 | } |
| 346 | |
| 347 | @Override |
| 348 | public boolean onTouch(View v, MotionEvent event) { |
| 349 | if (v == mLeftControl || v == mUpControl || v == mRightControl || v == mBottomControl) { |
| 350 | return handleControlTouchEvent(event); |
| 351 | } else if (v == mDragView || v == mLeftDrag || v == mTopDrag || v == mRightDrag |
| 352 | || v == mBottomDrag) { |
| 353 | return handleDragTouchEvent(event); |
| 354 | } |
| 355 | return false; |
| 356 | } |
| 357 | |
| 358 | private boolean handleControlTouchEvent(MotionEvent event) { |
| 359 | switch (event.getAction()) { |
| 360 | case MotionEvent.ACTION_UP: |
| 361 | case MotionEvent.ACTION_CANCEL: |
| 362 | mIsPressedDown = false; |
| 363 | break; |
| 364 | } |
| 365 | return false; |
| 366 | } |
| 367 | |
| 368 | private boolean handleDragTouchEvent(MotionEvent event) { |
| 369 | switch (event.getAction()) { |
| 370 | case MotionEvent.ACTION_DOWN: |
| 371 | mLastDrag.set(event.getRawX(), event.getRawY()); |
| 372 | return true; |
| 373 | case MotionEvent.ACTION_MOVE: |
| 374 | int xDiff = (int) (event.getRawX() - mLastDrag.x); |
| 375 | int yDiff = (int) (event.getRawY() - mLastDrag.y); |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 376 | moveMirrorWindow(xDiff, yDiff); |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 377 | mLastDrag.set(event.getRawX(), event.getRawY()); |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 378 | return true; |
| 379 | } |
| 380 | return false; |
| 381 | } |
| 382 | |
| 383 | private void setMoveOffset(View v, int moveFrameAmount) { |
| 384 | mMoveWindowOffset.set(0, 0); |
| 385 | |
| 386 | if (v == mLeftControl) { |
| 387 | mMoveWindowOffset.x = -moveFrameAmount; |
| 388 | } else if (v == mUpControl) { |
| 389 | mMoveWindowOffset.y = -moveFrameAmount; |
| 390 | } else if (v == mRightControl) { |
| 391 | mMoveWindowOffset.x = moveFrameAmount; |
| 392 | } else if (v == mBottomControl) { |
| 393 | mMoveWindowOffset.y = moveFrameAmount; |
| 394 | } |
| 395 | } |
| 396 | |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 397 | private void moveMirrorWindow(int xOffset, int yOffset) { |
| 398 | if (updateMagnificationFramePosition(xOffset, yOffset)) { |
| 399 | modifyWindowMagnification(mTransaction); |
| 400 | mTransaction.apply(); |
| 401 | } |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | /** |
| 405 | * Calculates the desired source bounds. This will be the area under from the center of the |
| 406 | * displayFrame, factoring in scale. |
| 407 | */ |
| 408 | private Rect getSourceBounds(Rect displayFrame, float scale) { |
| 409 | int halfWidth = displayFrame.width() / 2; |
| 410 | int halfHeight = displayFrame.height() / 2; |
| 411 | int left = displayFrame.left + (halfWidth - (int) (halfWidth / scale)); |
| 412 | int right = displayFrame.right - (halfWidth - (int) (halfWidth / scale)); |
| 413 | int top = displayFrame.top + (halfHeight - (int) (halfHeight / scale)); |
| 414 | int bottom = displayFrame.bottom - (halfHeight - (int) (halfHeight / scale)); |
| 415 | return new Rect(left, top, right, bottom); |
| 416 | } |
| 417 | |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 418 | private void setMagnificationFrameBoundary() { |
| 419 | // Calculates width and height for magnification frame could exceed out the screen. |
| 420 | // TODO : re-calculating again when scale is changed. |
| 421 | // The half width of magnification frame. |
| 422 | final int halfWidth = mMagnificationFrame.width() / 2; |
| 423 | // The half height of magnification frame. |
| 424 | final int halfHeight = mMagnificationFrame.height() / 2; |
| 425 | // The scaled half width of magnified region. |
| 426 | final int scaledWidth = (int) (halfWidth / mScale); |
| 427 | // The scaled half height of magnified region. |
| 428 | final int scaledHeight = (int) (halfHeight / mScale); |
| 429 | final int exceededWidth = halfWidth - scaledWidth; |
| 430 | final int exceededHeight = halfHeight - scaledHeight; |
| 431 | |
| 432 | mMagnificationFrameBoundary.set(-exceededWidth, -exceededHeight, |
| 433 | mDisplaySize.x + exceededWidth, mDisplaySize.y + exceededHeight); |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * Calculates and sets the real position of magnification frame based on the magnified region |
| 438 | * should be limited by the region of the display. |
| 439 | */ |
| 440 | private boolean updateMagnificationFramePosition(int xOffset, int yOffset) { |
| 441 | mTmpRect.set(mMagnificationFrame); |
| 442 | mTmpRect.offset(xOffset, yOffset); |
| 443 | |
| 444 | if (mTmpRect.left < mMagnificationFrameBoundary.left) { |
| 445 | mTmpRect.offsetTo(mMagnificationFrameBoundary.left, mTmpRect.top); |
| 446 | } else if (mTmpRect.right > mMagnificationFrameBoundary.right) { |
| 447 | final int leftOffset = mMagnificationFrameBoundary.right - mMagnificationFrame.width(); |
| 448 | mTmpRect.offsetTo(leftOffset, mTmpRect.top); |
| 449 | } |
| 450 | |
| 451 | if (mTmpRect.top < mMagnificationFrameBoundary.top) { |
| 452 | mTmpRect.offsetTo(mTmpRect.left, mMagnificationFrameBoundary.top); |
| 453 | } else if (mTmpRect.bottom > mMagnificationFrameBoundary.bottom) { |
| 454 | final int topOffset = mMagnificationFrameBoundary.bottom - mMagnificationFrame.height(); |
| 455 | mTmpRect.offsetTo(mTmpRect.left, topOffset); |
| 456 | } |
| 457 | |
| 458 | if (!mTmpRect.equals(mMagnificationFrame)) { |
| 459 | mMagnificationFrame.set(mTmpRect); |
| 460 | return true; |
| 461 | } |
| 462 | return false; |
| 463 | } |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 464 | @Override |
| 465 | public void surfaceCreated(SurfaceHolder holder) { |
| 466 | createMirror(); |
| 467 | } |
| 468 | |
| 469 | @Override |
| 470 | public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { |
| 471 | } |
| 472 | |
| 473 | @Override |
| 474 | public void surfaceDestroyed(SurfaceHolder holder) { |
| 475 | } |
| 476 | |
| 477 | class MoveMirrorRunnable implements Runnable { |
| 478 | @Override |
| 479 | public void run() { |
| 480 | if (mIsPressedDown) { |
Jacky Kao | d5ad33d | 2020-01-30 16:03:57 +0800 | [diff] [blame] | 481 | moveMirrorWindow(mMoveWindowOffset.x, mMoveWindowOffset.y); |
chaviw | 4ce1ddf | 2019-10-25 13:46:47 -0700 | [diff] [blame] | 482 | mHandler.postDelayed(mMoveMirrorRunnable, 100); |
| 483 | } |
| 484 | } |
| 485 | } |
| 486 | } |