Implement radio button for Sky’s fn2

sky/engine/core/painting/Paint.h

Index: sky/engine/core/painting/Paint.h
diff --git a/sky/engine/core/painting/Paint.h b/sky/engine/core/painting/Paint.h
index 71ac40573207b2a3fe8d5fd720c16070fd404c92..c9b7e1657b2c9dee4be6fe9c6cf544400e084ae5 100644
--- a/sky/engine/core/painting/Paint.h
+++ b/sky/engine/core/painting/Paint.h
@@ -33,6 +33,12 @@ public:
     SkColor color() const { return m_paint.getColor(); }
     void setColor(SkColor color) { m_paint.setColor(color); }
 
+    unsigned short style() const { return m_paint.getStyle(); }
+    void setStyle(unsigned short style) { m_paint.setStyle(static_cast<SkPaint::Style>(style)); }
+
+    SkScalar strokeWidth() const { return m_paint.getStrokeWidth(); }
+    void setStrokeWidth(SkScalar strokeWidth) { m_paint.setStrokeWidth(strokeWidth); }
+
     void setARGB(unsigned a, unsigned r, unsigned g, unsigned b)
     {
         m_paint.setARGB(a, r, g, b);