DrawArcGradient
virtual void DrawArcGradient(const BPoint& center, const BPoint& radii, float startTheta,
callbacks.DrawArcGradient(*center, *radii, *startTheta,
virtual void DrawArcGradient(const BPoint& center, const BPoint& radii, float startTheta,
virtual void DrawArcGradient(const BPoint& center, const BPoint& radii, float startTheta,
virtual void DrawArcGradient(const BPoint& center, const BPoint& radii, float startTheta,