diff options
Diffstat (limited to 'Xamarin.Forms.Platform.MacOS/Renderers/ActivityIndicatorRenderer.cs')
-rw-r--r-- | Xamarin.Forms.Platform.MacOS/Renderers/ActivityIndicatorRenderer.cs | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.MacOS/Renderers/ActivityIndicatorRenderer.cs b/Xamarin.Forms.Platform.MacOS/Renderers/ActivityIndicatorRenderer.cs new file mode 100644 index 00000000..2e179161 --- /dev/null +++ b/Xamarin.Forms.Platform.MacOS/Renderers/ActivityIndicatorRenderer.cs @@ -0,0 +1,70 @@ +using System.ComponentModel; +using System.Drawing; +using AppKit; +using CoreImage; + +namespace Xamarin.Forms.Platform.MacOS +{ + public class ActivityIndicatorRenderer : ViewRenderer<ActivityIndicator, NSProgressIndicator> + { + static CIColorPolynomial s_currentColorFilter; + static NSColor s_currentColor; + + protected override void OnElementChanged(ElementChangedEventArgs<ActivityIndicator> e) + { + if (e.NewElement != null) + { + if (Control == null) + SetNativeControl(new NSProgressIndicator(RectangleF.Empty) { Style = NSProgressIndicatorStyle.Spinning }); + + UpdateColor(); + UpdateIsRunning(); + } + + base.OnElementChanged(e); + } + + protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e) + { + base.OnElementPropertyChanged(sender, e); + + if (e.PropertyName == ActivityIndicator.ColorProperty.PropertyName) + UpdateColor(); + else if (e.PropertyName == ActivityIndicator.IsRunningProperty.PropertyName) + UpdateIsRunning(); + } + + void UpdateColor() + { + var color = Element.Color; + if (s_currentColorFilter == null && color.IsDefault) + return; + + if (color.IsDefault) + Control.ContentFilters = new CIFilter[0]; + + var newColor = Element.Color.ToNSColor(); + if (Equals(s_currentColor, newColor)) + return; + + s_currentColor = newColor; + + s_currentColorFilter = new CIColorPolynomial + { + RedCoefficients = new CIVector(s_currentColor.RedComponent), + BlueCoefficients = new CIVector(s_currentColor.BlueComponent), + GreenCoefficients = new CIVector(s_currentColor.GreenComponent) + }; + + Control.ContentFilters = new CIFilter[] { s_currentColorFilter }; + } + + void UpdateIsRunning() + { + if (Element.IsRunning) + Control.StartAnimation(this); + else + Control.StopAnimation(this); + } + } +}
\ No newline at end of file |