Reference for the Mosaic class Graphics::RadialGradient

Graphics::RadialGradient Center Radius Graphics::Gradient EndColor StartColor AddColorStop() GetMaxNoOfColorStops() GetNoOfColorStops() SetColorStop() SetMaxNoOfColorStops()

The class Graphics::RadialGradient provides functionality to define radial gradients. Such gradients can be used by Views::FillGradientPath or Views::StrokeGradientPath to fill a polygon or stroke its outline. At the runtime the radial gradient interpolates color values along a chord of a circle with center position and radius specified in the properties Center and Radius. The coordinates are expressed in pixel relative to the top-left corner of the view using that gradient.

A radial gradient is determined by a list of color stops. To add new and modify existing color stops use the methods AddColorStop() and SetColorStop(). Before adding color stops, the maximum capacity of the gradient has to be specified by using the method SetMaxNoOfColorStops().

In case of simple gradients consisting of two color stops only, the convenience properties StartColor and EndColor can be used. In such case it is not necessary to explicitly specify the capacity of the gradient and it is not necessary to add any color stops. Just specify the start and the end colors of the gradient in the both mentioned properties.

To query the capacity of the gradient the method GetMaxNoOfColorStops() is available. To query the number of already specified color stops, use the method GetNoOfColorStops().