[Tizen] Add CornerRadius implementation on BoxView (xamarin#2806)

sttassociates · May 23, 2018 · 31c432c · 31c432c
1 parent 4dcfa9e
commit 31c432c
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Showing 2 changed files with 128 additions and 4 deletions.
diff --git a/Xamarin.Forms.Platform.Tizen/Native/RoundRectangle.cs b/Xamarin.Forms.Platform.Tizen/Native/RoundRectangle.cs
@@ -0,0 +1,101 @@
+using System;
+using ElmSharp;
+
+namespace Xamarin.Forms.Platform.Tizen.Native
+{
+	public class RoundRectangle : Polygon
+	{
+		int[] _radius = new int[4];
+		public RoundRectangle(EvasObject parent) : base(parent)
+		{
+		}
+
+		public int X { get; set; }
+		public int Y { get; set; }
+
+		public int Width { get; set; }
+		public int Height { get; set; }
+
+		public void SetRadius(int r)
+		{
+			SetRadius(r, r, r, r);
+		}
+
+		public void SetRadius(int topLeft, int topRight, int bottomLeft, int bottomRight)
+		{
+			_radius[0] = topLeft;
+			_radius[1] = topRight;
+			_radius[2] = bottomLeft;
+			_radius[3] = bottomRight;
+		}
+
+		public void Draw()
+		{
+			DrawPoints();
+		}
+
+		public void Draw(Rect bound)
+		{
+			X = bound.X;
+			Y = bound.Y;
+			Width = bound.Width;
+			Height = bound.Height;
+			Draw();
+		}
+
+
+		protected virtual void DrawPoints()
+		{
+			int[] radius = new int[4];
+			int maxR = Math.Min(Width / 2, Height / 2);
+			radius[0] = Math.Min(_radius[0], maxR);
+			radius[1] = Math.Min(_radius[1], maxR);
+			radius[2] = Math.Min(_radius[2], maxR);
+			radius[3] = Math.Min(_radius[3], maxR);
+
+			ClearPoints();
+			for (int i = 0; i <= radius[0]; i++)
+			{
+				int x = i;
+				int dx = radius[0] - x;
+				int y = radius[0] - (int)Math.Sqrt((radius[0] * radius[0]) - (dx * dx));
+				AddRelativePoint(x, y);
+			}
+
+			AddRelativePoint(Width - radius[1], 0);
+
+			for (int i = Width - radius[1]; i <= Width; i++)
+			{
+				int x = i;
+				int dx = radius[1] - (Width - x);
+				int y = radius[1] - (int)Math.Sqrt((radius[1] * radius[1]) - (dx * dx));
+				AddRelativePoint(x, y);
+			}
+
+			AddRelativePoint(Width, Height - radius[3]);
+
+			for (int i = Width; i >= Width - radius[3]; i--)
+			{
+				int x = i;
+				int dx = radius[3] - (Width - x);
+				int y = Height - radius[3] + (int)Math.Sqrt((radius[3] * radius[3]) - (dx * dx));
+				AddRelativePoint(x, y);
+			}
+
+			AddRelativePoint(radius[2], Height);
+
+			for (int i = radius[2]; i >= 0; i--)
+			{
+				int x = i;
+				int dx = radius[2] - x;
+				int y = Height - radius[2] + (int)Math.Sqrt((radius[2] * radius[2]) - (dx * dx));
+				AddRelativePoint(x, y);
+			}
+		}
+
+		void AddRelativePoint(int x, int y)
+		{
+			AddPoint(X + x, Y + y);
+		}
+	}
+}
diff --git a/Xamarin.Forms.Platform.Tizen/Renderers/BoxViewRenderer.cs b/Xamarin.Forms.Platform.Tizen/Renderers/BoxViewRenderer.cs
@@ -1,20 +1,24 @@
 using System.ComponentModel;
 using EColor = ElmSharp.Color;
-using ERectangle = ElmSharp.Rectangle;
+using Xamarin.Forms.Platform.Tizen.Native;
 
 namespace Xamarin.Forms.Platform.Tizen
 {
-	public class BoxViewRenderer : ViewRenderer<BoxView, ERectangle>
+	public class BoxViewRenderer : ViewRenderer<BoxView, RoundRectangle>
 	{
+		public BoxViewRenderer()
+		{
+			RegisterPropertyHandler(nameof(Element.CornerRadius), OnRadiusUpdate);
+		}
+
 		protected override void OnElementChanged(ElementChangedEventArgs<BoxView> e)
 		{
 			if (Control == null)
 			{
-				SetNativeControl(new ERectangle(Forms.NativeParent));
+				SetNativeControl(new RoundRectangle(Forms.NativeParent));
 			}
 
 			UpdateColor();
-
 			base.OnElementChanged(e);
 		}
 
@@ -38,6 +42,12 @@ protected override void UpdateBackgroundColor(bool initialize)
 			}
 		}
 
+		protected override void UpdateLayout()
+		{
+			base.UpdateLayout();
+			Control.Draw(Control.Geometry);
+		}
+
 		protected override void UpdateOpacity(bool initialize)
 		{
 			if (initialize && Element.Opacity == 1d)
@@ -46,6 +56,19 @@ protected override void UpdateOpacity(bool initialize)
 			UpdateColor();
 		}
 
+		void OnRadiusUpdate(bool init)
+		{
+			int topLeft = Forms.ConvertToScaledPixel(Element.CornerRadius.TopLeft);
+			int topRight = Forms.ConvertToScaledPixel(Element.CornerRadius.TopRight);
+			int bottomLeft = Forms.ConvertToScaledPixel(Element.CornerRadius.BottomLeft);
+			int bottomRight = Forms.ConvertToScaledPixel(Element.CornerRadius.BottomRight);
+			Control.SetRadius(topLeft, topRight, bottomLeft, bottomRight);
+			if (!init)
+			{
+				Control.Draw();
+			}
+		}
+
 		void UpdateColor()
 		{
 			if (Element.Color.IsDefault)