/**
* update the canvas with latest changes to model drawing. Zoom is managed. Changes performed by
* tool are managed.
*/
@Override
protected void onDraw(Canvas canvas) {
dLogger.start();
Rect bounds = mModel.getBounds();
Rect dummyBounds = new Rect();
if (bounds != null && canvas.getClipBounds(dummyBounds)) {
// Draw current path in a scratch buffer
Rect tmp = (Rect) new Rect(mWindowRect); // TODO restore code to manage part of change only.
// mCoordinateMapper.fromReference(bounds); // find out what part of the canvas is impacted.
tmp.intersect(mWindowRect); // We don't update outside of the screen
Rect srcRect = mCoordinateMapper.toReference(tmp);
Log.i(
"onDraw",
"refreshing partial area "
+ tmp
+ " from "
+ srcRect
+ " clip bounds were "
+ dummyBounds);
mModel.renderTentativeUpdates(mTool, srcRect);
// update the impacted part from the corresponding input part.
mModel.copyRendered(canvas, srcRect, tmp);
} else {
Rect srcRect = mCoordinateMapper.toReference(mWindowRect);
Log.i("onDraw", "refreshing whole area" + mWindowRect + " from " + srcRect);
mModel.copyReference(canvas, srcRect, mWindowRect);
}
// canvas.drawPath(mPath, mPaint); //TODO all drawing should be performed in reference bitmap
dLogger.end();
}
/**
* Main method that handles low level touch events and calls the specific methods touch_up,
* touch_down, touch_move.
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
float referenceCoords[] = mCoordinateMapper.toReferenceRounded(x, y);
mTouchLogger.onTouchEvent(event);
// mScaleDetector.onTouchEvent(event);
mScrollDetector.onTouchEvent(event);
if (!gestureInProgress) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mTool.touch_start(referenceCoords[0], referenceCoords[1]);
break;
case MotionEvent.ACTION_MOVE:
mTool.touch_move(referenceCoords[0], referenceCoords[1]);
break;
case MotionEvent.ACTION_UP:
mTool.touch_up();
break;
default:
Log.w("View", "unrecognized action" + event.getAction());
}
if (mModel.getBounds() != null) {
invalidate(mCoordinateMapper.fromReference(mModel.getBounds()));
// mBounds = null; // invalidate operation is destructive, so the pointer should not be kept
} else {
invalidate();
}
}
return true;
}
