85 строки
1.7 KiB
C#
85 строки
1.7 KiB
C#
using System.ComponentModel;
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using Windows.UI.Xaml;
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using Windows.UI.Xaml.Controls;
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#if WINDOWS_UWP
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namespace Xamarin.Forms.Platform.UWP
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#else
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namespace Xamarin.Forms.Platform.WinRT
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#endif
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{
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public class FrameRenderer : ViewRenderer<Frame, Border>
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{
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public FrameRenderer()
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{
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AutoPackage = false;
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}
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protected override void OnElementChanged(ElementChangedEventArgs<Frame> e)
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{
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base.OnElementChanged(e);
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if (e.NewElement != null)
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{
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if (Control == null)
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SetNativeControl(new Border());
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PackChild();
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UpdateBorder();
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UpdateCornerRadius();
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}
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}
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protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
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{
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base.OnElementPropertyChanged(sender, e);
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if (e.PropertyName == "Content")
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{
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PackChild();
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}
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else if (e.PropertyName == Frame.OutlineColorProperty.PropertyName || e.PropertyName == Frame.HasShadowProperty.PropertyName)
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{
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UpdateBorder();
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}
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else if (e.PropertyName == Frame.CornerRadiusProperty.PropertyName)
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{
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UpdateCornerRadius();
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}
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}
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void PackChild()
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{
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if (Element.Content == null)
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return;
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IVisualElementRenderer renderer = Element.Content.GetOrCreateRenderer();
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Control.Child = renderer.ContainerElement;
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}
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void UpdateBorder()
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{
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if (Element.OutlineColor != Color.Default)
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{
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Control.BorderBrush = Element.OutlineColor.ToBrush();
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Control.BorderThickness = new Windows.UI.Xaml.Thickness(1);
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}
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else
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{
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Control.BorderBrush = new Color(0, 0, 0, 0).ToBrush();
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}
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}
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void UpdateCornerRadius()
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{
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float cornerRadius = Element.CornerRadius;
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if (cornerRadius == -1f)
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cornerRadius = 5f; // default corner radius
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Control.CornerRadius = new CornerRadius(cornerRadius);
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}
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}
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} |