Add DefaultRenderer

 TASK=TCAPI-2601

 - To prevent throwing exception when the renderer does not exist.
   e.g. using customized view that is inherited View without implementing Renderer.
 - To run ControlGallery app(Xamarin.Forms project) which uses View directly.

Change-Id: I8244f24e2dec7cf6e54cddd0fb191a37c34c7936

2 files changed, 21 insertions, 8 deletions

diff --git a/Xamarin.Forms.Platform.Tizen/Platform.cs b/Xamarin.Forms.Platform.Tizen/Platform.cs
index c48a66e..5b0fd34 100644
--- a/Xamarin.Forms.Platform.Tizen/Platform.cs
+++ b/Xamarin.Forms.Platform.Tizen/Platform.cs
@@ -128,7 +128,7 @@ namespace Xamarin.Forms.Platform.Tizen
 			// Make naviitem transparent if Forms.Context.MainWindow is transparent.
 			// Make sure that this is only for _navModel._naviTree. (not for _navModel._modalStack)
 			// In addtion, the style of naviItem is only decided before the naviItem pushed into Naviframe. (not on-demand).
-			if(Forms.Context.MainWindow.Alpha)
+			if (Forms.Context.MainWindow.Alpha)
 			{
 				naviItem.Style = "default/transparent";
 			}
@@ -172,12 +172,7 @@ namespace Xamarin.Forms.Platform.Tizen
 
 		static IVisualElementRenderer AttachRenderer(VisualElement view)
 		{
-			IVisualElementRenderer visualElementRenderer = Registrar.Registered.GetHandler<IVisualElementRenderer>(view.GetType());
-
-			if (null == visualElementRenderer)
-			{
-				throw new ArgumentException(String.Format("{0} doesn't have assigned renderer!", view.GetType()));
-			}
+			IVisualElementRenderer visualElementRenderer = Registrar.Registered.GetHandler<IVisualElementRenderer>(view.GetType()) ?? new DefaultRenderer();
 
 			visualElementRenderer.SetElement(view);
 
@@ -344,4 +339,4 @@ namespace Xamarin.Forms.Platform.Tizen
 			tcs?.SetResult(true);
 		}
 	}
-}
+}
\ No newline at end of file
diff --git a/Xamarin.Forms.Platform.Tizen/Renderers/DefaultRenderer.cs b/Xamarin.Forms.Platform.Tizen/Renderers/DefaultRenderer.cs
new file mode 100644
index 0000000..ab009ff
--- /dev/null
+++ b/Xamarin.Forms.Platform.Tizen/Renderers/DefaultRenderer.cs
@@ -0,0 +1,18 @@
+using ElmSharp;
+using ELayout = ElmSharp.Layout;
+
+namespace Xamarin.Forms.Platform.Tizen
+{
+	public sealed class DefaultRenderer : VisualElementRenderer<VisualElement>
+	{
+		protected override void OnElementChanged(ElementChangedEventArgs<VisualElement> e)
+		{
+			if (NativeView == null)
+			{
+				var control = new ELayout(Forms.Context.MainWindow);
+				SetNativeControl(control);
+			}
+			base.OnElementChanged(e);
+		}
+	}
+}
\ No newline at end of file