Implement radio button for Sky’s fn2

sky/engine/core/painting/Paint.idl

Index: sky/engine/core/painting/Paint.idl
diff --git a/sky/engine/core/painting/Paint.idl b/sky/engine/core/painting/Paint.idl
index 27f4b20b3532b890b073768aa1e7076d27e0559e..f86cc75451581f64776efdb4042583f2864b2f7b 100644
--- a/sky/engine/core/painting/Paint.idl
+++ b/sky/engine/core/painting/Paint.idl
@@ -5,6 +5,14 @@
 [
   Constructor(),
 ] interface Paint {
+  // Style
+  const unsigned short FILL_STYLE            = 0;

[eseidel, 2015/06/04 23:50:54]

If you're exposing these, can we use them in the callsites?

I think mpcomplete was having luck using enums too.

[jackson, 2015/06/05 00:23:10]

I'm going to rewrite this to work like TransferMode in a separate CL

+  const unsigned short STROKE_STYLE          = 1;
+  const unsigned short STROKE_AND_FILL_STYLE = 2;
+
+  // TODO(jackson): we could wrap this enum like we did for |color|
+  attribute unsigned short style;
+  attribute float strokeWidth;

[eseidel, 2015/06/04 23:51:59]

Do we do double now?

[jackson, 2015/06/05 00:23:09]

The Skia API is float

   attribute boolean isAntiAlias;
   attribute Color color;