1 files changed, 68 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT/ActivityIndicatorRenderer.cs b/Xamarin.Forms.Platform.WinRT/ActivityIndicatorRenderer.cs
new file mode 100644
index 00000000..5c36afda
--- /dev/null
+++ b/Xamarin.Forms.Platform.WinRT/ActivityIndicatorRenderer.cs
@@ -0,0 +1,68 @@
+using System.ComponentModel;
+using Windows.UI.Xaml;
+
+#if WINDOWS_UWP
+
+namespace Xamarin.Forms.Platform.UWP
+#else
+
+namespace Xamarin.Forms.Platform.WinRT
+#endif
+{
+	public class ActivityIndicatorRenderer : ViewRenderer<ActivityIndicator, Windows.UI.Xaml.Controls.ProgressBar>
+	{
+		object _foregroundDefault;
+
+		protected override void OnElementChanged(ElementChangedEventArgs<ActivityIndicator> e)
+		{
+			base.OnElementChanged(e);
+
+			if (e.NewElement != null)
+			{
+				if (Control == null)
+				{
+					SetNativeControl(new Windows.UI.Xaml.Controls.ProgressBar { IsIndeterminate = true });
+
+					Control.Loaded += OnControlLoaded;
+				}
+
+				// UpdateColor() called when loaded to ensure we can cache dynamic default colors
+				UpdateIsRunning();
+			}
+		}
+
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+		{
+			base.OnElementPropertyChanged(sender, e);
+
+			if (e.PropertyName == ActivityIndicator.IsRunningProperty.PropertyName)
+				UpdateIsRunning();
+			else if (e.PropertyName == ActivityIndicator.ColorProperty.PropertyName)
+				UpdateColor();
+		}
+
+		void OnControlLoaded(object sender, RoutedEventArgs routedEventArgs)
+		{
+			_foregroundDefault = Control.GetForegroundCache();
+			UpdateColor();
+		}
+
+		void UpdateColor()
+		{
+			Color color = Element.Color;
+			if (color.IsDefault)
+			{
+				Control.RestoreForegroundCache(_foregroundDefault);
+			}
+			else
+			{
+				Control.Foreground = color.ToBrush();
+			}
+		}
+
+		void UpdateIsRunning()
+		{
+			Opacity = Element.IsRunning ? 1 : 0;
+		}
+	}
+}
+\ No newline at end of file