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, 60 insertions, 0 deletions

diff --git a/Xamarin.Forms.Platform.Tizen/Cells/ImageCellRenderer.cs b/Xamarin.Forms.Platform.Tizen/Cells/ImageCellRenderer.cs
new file mode 100644
index 00000000..9492e7c6
--- /dev/null
+++ b/Xamarin.Forms.Platform.Tizen/Cells/ImageCellRenderer.cs
@@ -0,0 +1,60 @@
+using ElmSharp;
+using System.Collections.Generic;
+
+namespace Xamarin.Forms.Platform.Tizen
+{
+	public class ImageCellRenderer : TextCellRenderer
+	{
+		const int _defaultHeight = 100;
+		Dictionary<EvasObject, Native.Image> _realizedViews = new Dictionary<EvasObject, Native.Image>();
+
+		public ImageCellRenderer() : this("type1")
+		{
+			ImagePart = "elm.swallow.icon";
+		}
+		protected ImageCellRenderer(string style) : base(style) { }
+
+		protected string ImagePart { get; set; }
+
+		protected override EvasObject OnGetContent(Cell cell, string part)
+		{
+			if (part == ImagePart)
+			{
+				var imgCell = cell as ImageCell;
+				var size = imgCell.RenderHeight;
+				if (size <= 0)
+				{
+					size = _defaultHeight;
+				}
+
+				var image = new Native.Image(Forms.Context.MainWindow)
+				{
+					MinimumWidth = (int)size,
+					MinimumHeight = (int)size
+				};
+				image.SetAlignment(-1.0, -1.0); // fill
+				image.SetWeight(1.0, 1.0); // expand
+
+				image.LoadFromImageSourceAsync(imgCell.ImageSource);
+				return image;
+			}
+			else
+			{
+				return null;
+			}
+		}
+
+		protected override bool OnCellPropertyChanged(Cell cell, string property, Dictionary<string, EvasObject> realizedView)
+		{
+			if (property == ImageCell.ImageSourceProperty.PropertyName)
+			{
+				EvasObject image;
+				realizedView.TryGetValue(ImagePart, out image);
+				(image as Native.Image)?.LoadFromImageSourceAsync((cell as ImageCell)?.ImageSource);
+				return false;
+			}
+			return base.OnCellPropertyChanged(cell, property, realizedView);
+		}
+
+	}
+}