Add Tizen backend renderer

- Xamarin.Forms.Platform.Tizen has been added
- Xamarin.Forms.Maps.Tizen has been added
- RPM build spec has been added

Change-Id: I0021e0f040d97345affc87512ee0f6ce437f4e6d

1 files changed, 57 insertions, 0 deletions

diff --git a/Xamarin.Forms.Platform.Tizen/Renderers/LayoutRenderer.cs b/Xamarin.Forms.Platform.Tizen/Renderers/LayoutRenderer.cs
new file mode 100644
index 00000000..61421c79
--- /dev/null
+++ b/Xamarin.Forms.Platform.Tizen/Renderers/LayoutRenderer.cs
@@ -0,0 +1,57 @@
+using System;
+
+namespace Xamarin.Forms.Platform.Tizen
+{
+	/// <summary>
+	/// Renderer of a Layout.
+	/// </summary>
+	public class LayoutRenderer : ViewRenderer<Layout, Native.Canvas>
+	{
+		/// <summary>
+		/// Default constructor.
+		/// </summary>
+		public LayoutRenderer()
+		{
+		}
+
+		protected override void UpdateLayout()
+		{
+			// in case of layouts we need to make sure that the minimum size of the native control is updated
+			// this is important in case of ScrollView, when it's content is likely to be wider/higher than the window
+			// EFL does not allow control to be larger than the window if it's minimum size is smaller than window dimensions
+			ScrollView scrollView = Element.Parent as ScrollView;
+			if (scrollView != null)
+			{
+				Size size = scrollView.ContentSize;
+				Control.MinimumWidth = ToNativeDimension(Math.Max(size.Width, scrollView.Content.Width));
+				Control.MinimumHeight = ToNativeDimension(Math.Max(size.Height, scrollView.Content.Height));
+			}
+
+			base.UpdateLayout();
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<Layout> e)
+		{
+			if (null == Control)
+			{
+				var canvas = new Native.Canvas(Forms.Context.MainWindow);
+				canvas.LayoutUpdated += OnLayoutUpdated;
+				SetNativeControl(canvas);
+			}
+
+			base.OnElementChanged(e);
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			Control.LayoutUpdated -= OnLayoutUpdated;
+
+			base.Dispose(disposing);
+		}
+
+		void OnLayoutUpdated(object sender, Native.LayoutEventArgs e)
+		{
+			DoLayout(e);
+		}
+	}
+}