public override bool OnScale(ScaleGestureDetector detector)
{
float scale = detector.ScaleFactor;
_padre.mScaleFactor *= detector.ScaleFactor;
_padre.mScaleFactor = Math.Max(_padre.MIN_ZOOM, Math.Min(_padre.mScaleFactor, _padre.MAX_ZOOM));
mFocusX = detector.FocusX;
mFocusY = detector.FocusY;
if (_padre.mScaleFactor < 2f)
{
// 1 Grabbing
float centerX = detector.FocusX;
float centerY = detector.FocusY;
// Console.WriteLine("CENTER: x=" + centerX + " y=" + centerY);
// 2 Calculating difference
float diffX = centerX - _padre.mPosX;
float diffY = centerY - _padre.mPosY;
// 3 Scaling difference
diffX = diffX * scale - diffX;
diffY = diffY * scale - diffY;
// 4 Updating image origin
_padre.mPosX -= diffX;
_padre.mPosY -= diffY;
}
_padre.Invalidate();
_padre.RequestLayout();
return(true);
}
public override bool OnDoubleTap(MotionEvent e)
{
//string a;
_padre.mPosX = e.GetX() * -1;
_padre.mPosY = e.GetY() * -1;
/*mFocusX = e.GetX();
* mFocusY = e.GetY();*/
if (_padre.mScaleFactor > _padre.MIN_ZOOM)
{
_padre.mScaleFactor = _padre.MIN_ZOOM;
}
else
{
_padre.mScaleFactor = _padre.MAX_ZOOM;
}
_padre.Invalidate();
_padre.RequestLayout();
return(true);
}
