1 files changed, 124 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.Tizen/Renderers/FrameRenderer.cs b/Xamarin.Forms.Platform.Tizen/Renderers/FrameRenderer.cs
new file mode 100644
index 00000000..0684c4ac
--- /dev/null
+++ b/Xamarin.Forms.Platform.Tizen/Renderers/FrameRenderer.cs
@@ -0,0 +1,124 @@
+using ElmSharp;
+using EColor = ElmSharp.Color;
+
+namespace Xamarin.Forms.Platform.Tizen
+{
+	public class FrameRenderer : ViewRenderer<Frame, Native.Canvas>
+	{
+		const int _thickness = 2;
+		const int _shadow_shift = 2;
+		const int _shadow_thickness = _thickness + 2;
+
+		static readonly EColor s_DefaultColor = EColor.Black;
+		static readonly EColor s_ShadowColor = EColor.FromRgba(80, 80, 80, 50);
+
+		Polygon _shadow = null;
+		Polygon _frame = null;
+
+		public FrameRenderer()
+		{
+			RegisterPropertyHandler(Frame.OutlineColorProperty, UpdateColor);
+			RegisterPropertyHandler(Frame.HasShadowProperty, UpdateShadowVisibility);
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<Frame> e)
+		{
+			if (Control == null)
+			{
+				SetNativeControl(new Native.Canvas(Forms.Context.MainWindow));
+
+				_shadow = new Polygon(NativeView);
+				_shadow.Color = s_ShadowColor;
+				Control.Children.Add(_shadow);
+
+				_frame = new Polygon(NativeView);
+				_frame.Show();
+				Control.Children.Add(_frame);
+			}
+
+			if (e.OldElement != null)
+			{
+				Control.LayoutUpdated -= OnLayoutUpdated;
+			}
+
+			if (e.NewElement != null)
+			{
+				Control.LayoutUpdated += OnLayoutUpdated;
+			}
+
+			base.OnElementChanged(e);
+		}
+
+		void OnLayoutUpdated(object sender, Native.LayoutEventArgs e)
+		{
+			UpdateGeometry();
+			// TODO: why is this DoLayout() required?
+			if (Element.Content != null)
+				base.DoLayout(e);
+		}
+
+		void UpdateGeometry()
+		{
+			var geometry = NativeView.Geometry;
+			DrawFrame(_frame,
+				geometry.X,
+				geometry.Y,
+				geometry.Right,
+				geometry.Bottom,
+				_thickness
+			);
+			DrawFrame(_shadow,
+				geometry.X + _shadow_shift,
+				geometry.Y + _shadow_shift,
+				geometry.Right - _thickness + _shadow_shift + _shadow_thickness,
+				geometry.Bottom - _thickness + _shadow_shift + _shadow_thickness,
+				_shadow_thickness
+			);
+		}
+
+		void DrawFrame(Polygon frame, int left, int top, int right, int bottom, int thickness)
+		{
+			frame.ClearPoints();
+			if (left + thickness >= right || top + thickness >= bottom)
+			{
+				if (left >= right || top >= bottom)
+					return;
+				// shape reduces to a rectangle
+				frame.AddPoint(left, top);
+				frame.AddPoint(right, top);
+				frame.AddPoint(right, bottom);
+				frame.AddPoint(left, bottom);
+				return;
+			}
+			// outside edge
+			frame.AddPoint(left, top);
+			frame.AddPoint(right, top);
+			frame.AddPoint(right, bottom);
+			frame.AddPoint(left, bottom);
+			frame.AddPoint(left, top + thickness);
+			// and inside edge
+			frame.AddPoint(left + thickness, top + thickness);
+			frame.AddPoint(left + thickness, bottom - thickness);
+			frame.AddPoint(right - thickness, bottom - thickness);
+			frame.AddPoint(right - thickness, top + thickness);
+			frame.AddPoint(left, top + thickness);
+		}
+
+		void UpdateColor()
+		{
+			if (Element.OutlineColor.IsDefault)
+				_frame.Color = s_DefaultColor;
+			else
+				_frame.Color = Element.OutlineColor.ToNative();
+		}
+
+		void UpdateShadowVisibility()
+		{
+			if (Element.HasShadow)
+				_shadow.Show();
+			else
+				_shadow.Hide();
+		}
+
+	}
+}