on touch event you must use the inverted matrix used on dispatch draw of
the view. Follow both method implementation:
private Matrix invertedMatrix = new Matrix();
private float[] tempLocation = new float[2];
@Override
protected void dispatchDraw(Canvas canvas) {
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.rotate(-mHeading, getWidth() * 0.5f, getHeight() * 0.5f);
canvas.getMatrix().invert(invertedMatrix);
mCanvas.delegate = canvas;
super.dispatchDraw(mCanvas);
canvas.restore();
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
float[] location = tempLocation;
location[0] = ev.getX();
location[1] = ev.getY();
invertedMatrix.mapPoints(location);
ev.setLocation(location[0], location[1]);
return super.dispatchTouchEvent(ev);
}
Em quinta-feira, 25 de fevereiro de 2010 00h30min22s UTC-3, lbendlin
escreveu:
>
> I am using the MapsDemo example for a mapping application where I
> rotate the map in direction of travel. This works well even without
> the canvas smoothing in the example.
>
> However, I haven't yet managed to adjust the dispatchTouchEvent code
> to counter the map rotation effect for the user touches (right now
> when the map is rotated 90 degrees a user's horizontal sweep will move
> the map vertically etc). The sample code only offers the teaser:
>
> public boolean dispatchTouchEvent(MotionEvent ev) {
> // TODO: rotate events too
> return super.dispatchTouchEvent(ev);
> }
>
> Any guidance would be appreciated.
>
> And while I am at it - Is it still possible to position the zoom
> controls separately, so that they do NOT rotate when the map rotates?
> I read that the getZoomControls() is deprecated. (Why ?)
>
>
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