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BoxViewRenderer.cs
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BoxViewRenderer.cs
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using System.ComponentModel;
using AppKit;
using Xamarin.Forms.Platform.macOS.Controls;
namespace Xamarin.Forms.Platform.MacOS
{
public class BoxViewRenderer : ViewRenderer<BoxView, NSView>
{
protected override void OnElementChanged(ElementChangedEventArgs<BoxView> e)
{
if (e.NewElement != null)
{
if (Control == null)
{
var boxView = new FormsBoxView();
SetNativeControl (boxView);
}
SetBackgroundColor(Element.Color);
SetCornerRadius(Element.CornerRadius);
}
base.OnElementChanged(e);
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == BoxView.ColorProperty.PropertyName)
SetBackgroundColor(Element.Color);
else if (e.PropertyName == BoxView.CornerRadiusProperty.PropertyName)
SetCornerRadius(Element.CornerRadius);
else if (e.PropertyName == VisualElement.IsVisibleProperty.PropertyName && Element.IsVisible)
SetNeedsDisplayInRect(Bounds);
}
protected override void SetBackgroundColor (Color color)
{
if (Element == null || Control == null)
return;
(Control as FormsBoxView)?.SetColor (color.ToNSColor ());
}
void SetCornerRadius(CornerRadius cornerRadius)
{
if (Element == null)
return;
Control.Layer.MasksToBounds = true;
(Control as FormsBoxView)?.SetCornerRadius ((float)cornerRadius.TopLeft, (float)cornerRadius.TopRight, (float)cornerRadius.BottomLeft, (float)cornerRadius.BottomRight);
}
}
}