public override bool BeginTracking(UITouch uitouch, UIEvent uievent)
{
previousTouchPoint = uitouch.LocationInView(this);
if (lowerKnobLayer.Frame.Contains(previousTouchPoint))
{
lowerKnobLayer.Highlight = true;
lowerKnobLayer.SetNeedsDisplay();
}
else if (upperKnobLayer.Frame.Contains(previousTouchPoint))
{
upperKnobLayer.Highlight = true;
upperKnobLayer.SetNeedsDisplay();
}
return(lowerKnobLayer.Highlight || upperKnobLayer.Highlight);
}
private void SetKnobLayer(nfloat centerPosition, CERangeSliderKnobLayer layer)
{
layer.Frame = new CGRect(centerPosition - knobWidth / 2f, 0, knobWidth, knobWidth);
layer.ShadowOffset = new SizeF(0, 3);
layer.ShadowOpacity = 0.4f;
layer.ShadowColor = UIColor.Gray.CGColor;
layer.SetNeedsDisplay();
}