protected override void OnElementChanged(ElementChangedEventArgs <StackLayout> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
stack = e.NewElement as RoundEdgeStackLayout;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(@"ERROR:", ex.Message);
}
}
protected void UpdateElement(CoreGraphics.CGRect rect)
{
RoundEdgeStackLayout stack = (RoundEdgeStackLayout)this.Element;
CGColor startColor = stack.StartColor.ToCGColor();
CGColor endColor = stack.EndColor.ToCGColor();
try
{
//if(stack.HasBorderColor == true)
//{
//}
//else if(stack.BorderColor != null)
//{
//}
if (stack.HasBorderColor == true && stack.BorderColor.ToCGColor() != null)
{
double min = Math.Min(Element.Width, Element.Height);
this.Layer.CornerRadius = (float)(min / 2.0);
this.Layer.MasksToBounds = false;
this.Layer.BorderColor = stack.BorderColor.ToCGColor();
this.Layer.BorderWidth = Convert.ToSingle(stack.BorderThickness);
this.ClipsToBounds = true;
}
else
{
}
}
catch (Exception ex)
{
var msg = ex.Message;
//Debug.WriteLine("Unable to create circle image: " + ex);
}
var gradientLayer = new CAGradientLayer();
GradientStyle gradientStyle = stack.GradientDirection;
if (gradientStyle != GradientStyle.None)
{
if (gradientStyle == GradientStyle.Vertical)
{
}
else if (gradientStyle == GradientStyle.Horizontal)
{
gradientLayer.StartPoint = new CGPoint(0, 0.5);
gradientLayer.EndPoint = new CGPoint(1, 0.5);
}
else if (gradientStyle == GradientStyle.Inclined)
{
gradientLayer.StartPoint = new CGPoint(0, 0.5);
gradientLayer.EndPoint = new CGPoint(1, 0.5);
}
else
{
}
}
nfloat cornerRadius = 0.0f;
try
{
if (stack.CornerWRT == CornerRadiusReference.WRTHeightRequest && stack.CornerRadius == 0)
{
cornerRadius = (float)(stack.HeightRequest / 2);
}
else if (stack.CornerWRT == CornerRadiusReference.WRTWidthRequest && stack.CornerRadius == 0)
{
cornerRadius = (float)(stack.WidthRequest / 2);
}
else
{
cornerRadius = (float)(stack.CornerRadius);
}
}
catch (Exception ex)
{
var msg = ex.Message;
}
gradientLayer.Frame = rect;
gradientLayer.Colors = new CGColor[] { startColor, endColor };
gradientLayer.ModelLayer.CornerRadius = cornerRadius;//(float)(stack.CornerRadius);
NativeView.Layer.InsertSublayer(gradientLayer, 0);
}
