public override bool OnDoubleTap(MotionEvent e)
{
var consumed = false;
if (_view._doubleTapListener != null)
{
consumed = _view._doubleTapListener.OnDoubleTap(e);
}
if (_view._state == TouchState.None)
{
var targetZoom = (Math.Abs(_view._normalizedScale - _view._minScale) < Tolerance) ? _view._maxScale : _view._minScale;
var doubleTap = new DoubleTapZoom(_view, targetZoom, e.GetX(), e.GetY(), false);
_view.CompatPostOnAnimation(doubleTap);
consumed = true;
}
return(consumed);
}
public override bool OnDoubleTap(MotionEvent e)
{
bool consumed = false;
if (view.doubleTapListener != null)
{
consumed = view.doubleTapListener.OnDoubleTap(e);
}
if (view.state == TouchState.NONE)
{
float targetZoom = (view.normalizedScale == view.minScale) ? view.maxScale : view.minScale;
DoubleTapZoom doubleTap = new DoubleTapZoom(view, targetZoom, e.GetX(), e.GetY(), false);
view.CompatPostOnAnimation(doubleTap);
consumed = true;
}
return(consumed);
}
public override void OnScaleEnd(ScaleGestureDetector detector)
{
base.OnScaleEnd(detector);
_view.SetState(TouchState.None);
var animateToZoomBoundary = false;
var targetZoom = _view._normalizedScale;
if (_view._normalizedScale > _view._maxScale)
{
targetZoom = _view._maxScale;
animateToZoomBoundary = true;
}
else if (_view._normalizedScale < _view._minScale)
{
targetZoom = _view._minScale;
animateToZoomBoundary = true;
}
if (animateToZoomBoundary)
{
var doubleTap = new DoubleTapZoom(_view, targetZoom, _view.ViewWidth / 2f, _view.ViewHeight / 2f, true);
_view.CompatPostOnAnimation(doubleTap);
}
}
public override void OnScaleEnd(ScaleGestureDetector detector)
{
base.OnScaleEnd(detector);
view.SetState(TouchState.NONE);
bool animateToZoomBoundary = false;
float targetZoom = view.normalizedScale;
if (view.normalizedScale > view.maxScale)
{
targetZoom = view.maxScale;
animateToZoomBoundary = true;
}
else if (view.normalizedScale < view.minScale)
{
targetZoom = view.minScale;
animateToZoomBoundary = true;
}
if (animateToZoomBoundary)
{
DoubleTapZoom doubleTap = new DoubleTapZoom(view, targetZoom, view.viewWidth / 2, view.viewHeight / 2, true);
view.CompatPostOnAnimation(doubleTap);
}
}