public InnerScaleListener(PinchGestureHandler pinchGestureHandler)
{
if (pinchGestureHandler == null)
{
throw new ArgumentNullException(nameof(pinchGestureHandler));
}
_pinchDelegate = pinchGestureHandler.OnPinch;
_pinchStartedDelegate = pinchGestureHandler.OnPinchStarted;
_pinchEndedDelegate = pinchGestureHandler.OnPinchEnded;
}
public InnerScaleListener(PinchGestureHandler pinchGestureHandler, Func <double, double> fromPixels)
{
if (pinchGestureHandler == null)
{
throw new ArgumentNullException(nameof(pinchGestureHandler));
}
_pinchDelegate = pinchGestureHandler.OnPinch;
_pinchStartedDelegate = pinchGestureHandler.OnPinchStarted;
_pinchEndedDelegate = pinchGestureHandler.OnPinchEnded;
_fromPixels = fromPixels;
}
protected VisualElementRenderer() : base(Forms.Context)
{
_tapGestureHandler = new TapGestureHandler(() => View);
_panGestureHandler = new PanGestureHandler(() => View, Context.FromPixels);
_pinchGestureHandler = new PinchGestureHandler(() => View);
_gestureDetector =
new Lazy <GestureDetector>(
() =>
new GestureDetector(
_gestureListener =
new InnerGestureListener(_tapGestureHandler.OnTap, _tapGestureHandler.TapGestureRecognizers, _panGestureHandler.OnPan, _panGestureHandler.OnPanStarted, _panGestureHandler.OnPanComplete)));
_scaleDetector = new Lazy <ScaleGestureDetector>(
() => new ScaleGestureDetector(Context, new InnerScaleListener(_pinchGestureHandler.OnPinch, _pinchGestureHandler.OnPinchStarted, _pinchGestureHandler.OnPinchEnded))
);
}
