Renew the VisualElement.Opacity

- OpacityLayer is no more needed in renderer.
- There is a limitation on this chagne - Entry and Label are not support Opacity property anymore. It will be fixed soon when Elm# is support.

Change-Id: I52f0fc67fdfda65cf8141cceab877890d260a4e6

1 files changed, 31 insertions, 20 deletions

diff --git a/Xamarin.Forms.Platform.Tizen/Renderers/BoxViewRenderer.cs b/Xamarin.Forms.Platform.Tizen/Renderers/BoxViewRenderer.cs
index 7a9f756d..b0651340 100644
--- a/Xamarin.Forms.Platform.Tizen/Renderers/BoxViewRenderer.cs
+++ b/Xamarin.Forms.Platform.Tizen/Renderers/BoxViewRenderer.cs
@@ -4,11 +4,8 @@ using ERectangle = ElmSharp.Rectangle;
 
 namespace Xamarin.Forms.Platform.Tizen
 {
-	public class BoxViewRenderer :
-	VisualElementRenderer<BoxView>
+	public class BoxViewRenderer : VisualElementRenderer<BoxView>
 	{
-		static readonly EColor s_defaultColor = EColor.Transparent;
-
 		ERectangle _control;
 
 		public BoxViewRenderer()
@@ -23,10 +20,6 @@ namespace Xamarin.Forms.Platform.Tizen
 				SetNativeControl(_control);
 			}
 
-			if (e.OldElement != null)
-			{
-			}
-
 			if (e.NewElement != null)
 			{
 				UpdateColor();
@@ -35,27 +28,45 @@ namespace Xamarin.Forms.Platform.Tizen
 			base.OnElementChanged(e);
 		}
 
-		void UpdateColor()
+		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
 		{
-			Color colorToSet = Element.Color;
-
-			if (colorToSet == Color.Default)
+			if (e.PropertyName == BoxView.ColorProperty.PropertyName)
 			{
-				colorToSet = Element.BackgroundColor;
+				UpdateColor();
 			}
+			base.OnElementPropertyChanged(sender, e);
+		}
 
-			_control.Color = (colorToSet == Color.Default) ? s_defaultColor : colorToSet.ToNative();
+		protected override void UpdateBackgroundColor()
+		{
+			UpdateColor();
 		}
 
-		protected override void OnElementPropertyChanged(object sender,
-			PropertyChangedEventArgs e)
+		protected override void UpdateOpacity()
+		{
+			UpdateColor();
+		}
+
+		void UpdateColor()
 		{
-			if (e.PropertyName == BoxView.ColorProperty.PropertyName ||
-				e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName)
+			if (Element.Color.IsDefault)
 			{
-				UpdateColor();
+				if (Element.BackgroundColor.IsDefault)
+				{
+					// Set to default color. (Transparent)
+					_control.Color = EColor.Transparent;
+				}
+				else
+				{
+					// Use BackgroundColor only if color is default and background color is not default.
+					_control.Color = Element.BackgroundColor.MultiplyAlpha(Element.Opacity).ToNative();
+				}
+			}
+			else
+			{
+				// Color has higer priority than BackgroundColor.
+				_control.Color = Element.Color.MultiplyAlpha(Element.Opacity).ToNative();
 			}
-			base.OnElementPropertyChanged(sender, e);
 		}
 	}
 }