1 files changed, 195 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.Android/Renderers/FrameRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/FrameRenderer.cs
new file mode 100644
index 00000000..63fb5da4
--- /dev/null
+++ b/Xamarin.Forms.Platform.Android/Renderers/FrameRenderer.cs
@@ -0,0 +1,195 @@
+using System.ComponentModel;
+using Android.Graphics;
+using Android.Graphics.Drawables;
+using AButton = Android.Widget.Button;
+using ACanvas = Android.Graphics.Canvas;
+using GlobalResource = Android.Resource;
+
+namespace Xamarin.Forms.Platform.Android
+{
+	public class FrameRenderer : VisualElementRenderer<Frame>
+	{
+		bool _disposed;
+
+		protected override void Dispose(bool disposing)
+		{
+			base.Dispose(disposing);
+
+			if (disposing && !_disposed)
+			{
+				Background.Dispose();
+				_disposed = true;
+			}
+		}
+
+		protected override void OnElementChanged(ElementChangedEventArgs<Frame> e)
+		{
+			base.OnElementChanged(e);
+
+			if (e.NewElement != null && e.OldElement == null)
+				UpdateBackground();
+		}
+
+		void UpdateBackground()
+		{
+			SetBackgroundDrawable(new FrameDrawable(Element));
+		}
+
+		class FrameDrawable : Drawable
+		{
+			readonly Frame _frame;
+
+			bool _isDisposed;
+			Bitmap _normalBitmap;
+
+			public FrameDrawable(Frame frame)
+			{
+				_frame = frame;
+				frame.PropertyChanged += FrameOnPropertyChanged;
+			}
+
+			public override bool IsStateful
+			{
+				get { return false; }
+			}
+
+			public override int Opacity
+			{
+				get { return 0; }
+			}
+
+			public override void Draw(ACanvas canvas)
+			{
+				int width = Bounds.Width();
+				int height = Bounds.Height();
+
+				if (width <= 0 || height <= 0)
+				{
+					if (_normalBitmap != null)
+					{
+						_normalBitmap.Dispose();
+						_normalBitmap = null;
+					}
+					return;
+				}
+
+				if (_normalBitmap == null || _normalBitmap.Height != height || _normalBitmap.Width != width)
+				{
+					// If the user changes the orientation of the screen, make sure to detroy reference before
+					// reassigning a new bitmap reference.
+					if (_normalBitmap != null)
+					{
+						_normalBitmap.Dispose();
+						_normalBitmap = null;
+					}
+
+					_normalBitmap = CreateBitmap(false, width, height);
+				}
+				Bitmap bitmap = _normalBitmap;
+				using(var paint = new Paint())
+					canvas.DrawBitmap(bitmap, 0, 0, paint);
+			}
+
+			public override void SetAlpha(int alpha)
+			{
+			}
+
+			public override void SetColorFilter(ColorFilter cf)
+			{
+			}
+
+			protected override void Dispose(bool disposing)
+			{
+				if (disposing && !_isDisposed)
+				{
+					if (_normalBitmap != null)
+					{
+						_normalBitmap.Dispose();
+						_normalBitmap = null;
+					}
+
+					_isDisposed = true;
+				}
+
+				base.Dispose(disposing);
+			}
+
+			protected override bool OnStateChange(int[] state)
+			{
+				return false;
+			}
+
+			Bitmap CreateBitmap(bool pressed, int width, int height)
+			{
+				Bitmap bitmap;
+				using(Bitmap.Config config = Bitmap.Config.Argb8888)
+					bitmap = Bitmap.CreateBitmap(width, height, config);
+
+				using(var canvas = new ACanvas(bitmap))
+				{
+					DrawBackground(canvas, width, height, pressed);
+					DrawOutline(canvas, width, height);
+				}
+
+				return bitmap;
+			}
+
+			void DrawBackground(ACanvas canvas, int width, int height, bool pressed)
+			{
+				using(var paint = new Paint { AntiAlias = true })
+				using(var path = new Path())
+				using(Path.Direction direction = Path.Direction.Cw)
+				using(Paint.Style style = Paint.Style.Fill)
+				using(var rect = new RectF(0, 0, width, height))
+				{
+					float rx = Forms.Context.ToPixels(5);
+					float ry = Forms.Context.ToPixels(5);
+					path.AddRoundRect(rect, rx, ry, direction);
+
+					global::Android.Graphics.Color color = _frame.BackgroundColor.ToAndroid();
+
+					paint.SetStyle(style);
+					paint.Color = color;
+
+					canvas.DrawPath(path, paint);
+				}
+			}
+
+			void DrawOutline(ACanvas canvas, int width, int height)
+			{
+				using(var paint = new Paint { AntiAlias = true })
+				using(var path = new Path())
+				using(Path.Direction direction = Path.Direction.Cw)
+				using(Paint.Style style = Paint.Style.Stroke)
+				using(var rect = new RectF(0, 0, width, height))
+				{
+					float rx = Forms.Context.ToPixels(5);
+					float ry = Forms.Context.ToPixels(5);
+					path.AddRoundRect(rect, rx, ry, direction);
+
+					paint.StrokeWidth = 1;
+					paint.SetStyle(style);
+					paint.Color = _frame.OutlineColor.ToAndroid();
+
+					canvas.DrawPath(path, paint);
+				}
+			}
+
+			void FrameOnPropertyChanged(object sender, PropertyChangedEventArgs e)
+			{
+				if (e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName || e.PropertyName == Frame.OutlineColorProperty.PropertyName)
+				{
+					using(var canvas = new ACanvas(_normalBitmap))
+					{
+						int width = Bounds.Width();
+						int height = Bounds.Height();
+						canvas.DrawColor(global::Android.Graphics.Color.Black, PorterDuff.Mode.Clear);
+						DrawBackground(canvas, width, height, false);
+						DrawOutline(canvas, width, height);
+					}
+					InvalidateSelf();
+				}
+			}
+		}
+	}
+}
+\ No newline at end of file