Add widget state support.

src/base/core/Color.h

@@ -25,6 +25,11 @@ public:
 
     std::string toString() const;
 
+    void setAlpha(float alpha)
+    {
+        mAlpha = static_cast<double>(alpha);
+    }
+
     bool operator==(const Color& rhs) const
     {
        return (mR == rhs.mR)

src/base/geometry/primitives/Rectangle.cpp

@@ -50,4 +50,14 @@ namespace ntk {
     {
         return mBottomLeft;
     }
+
+    double Rectangle::getRadius() const
+    {
+        return mRadius;
+    }
+
+    void Rectangle::setRadius(double radius)
+    {
+        mRadius = radius;
+    }
 }

src/base/geometry/primitives/Rectangle.h

@@ -19,12 +19,17 @@ public:
 
     Type getType() const override;
 
+    double getRadius() const;
+
+    void setRadius(double radius);
+
     void sample(SparseGrid<bool>* grid) const override;
 
 private:
     Point mBottomLeft;
     double mWidth{0};
     double mHeight{0};
+    double mRadius{ 0.0 };
 };
 
 }