A linear or radial gradient. More...

#include <Wt/WGradient>

Classes
class	ColorStop
	A gradient color stop. More...

Public Member Functions
	WGradient ()
	Default constructor. More...

GradientStyle	style () const
	Returns the gradient style. More...

bool	isEmpty () const
	Returns whether the gradient is empty. More...

void	setLinearGradient (double x0, double y0, double x1, double y1)
	Configures a linear gradient. More...

void	setRadialGradient (double cx, double cy, double r, double fx, double fy)
	Configures a radial gradient. More...

void	addColorStop (double position, const WColor &color)
	Adds a color stop. More...

void	addColorStop (const ColorStop &colorstop)
	Adds a color stop. More...

void	clearColorStops ()
	Removes all color stops. More...

const std::vector< ColorStop > &	colorstops () const
	Returns the color stops. More...

const WLineF &	linearGradientVector () const
	Returns the line positioning the linear gradient. More...

const WPointF &	radialCenterPoint () const
	Returns the center of a radial gradient. More...

const WPointF &	radialFocalPoint () const
	Returns the focal point of a radial gradient. More...

double	radialRadius () const
	Returns the radius of a radial gradient. More...

bool	operator== (const WGradient &other) const
	Comparison operator.

bool	operator!= (const WGradient &other) const
	Comparison operator.

Detailed Description

A linear or radial gradient.

See also: WPen::setGradient(), WBrush::setGradient()

Constructor & Destructor Documentation

◆ WGradient()

Wt::WGradient::WGradient ( )

Default constructor.

Creates an empty linear gradient from (0,0) to (1,1) (without color stops).

See also: isEmpty()

Member Function Documentation

◆ addColorStop() [1/2]

void Wt::WGradient::addColorStop	(	double	position,
		const WColor &	color
	)

Adds a color stop.

For a linear gradient, the position is relative to the position on the line (from 0 to 1 corresponding to p0 to p1).

For a radial gradient, the position indicates the distance from the center (from 0 to 1 corresponding to center to radius).

◆ addColorStop() [2/2]

void Wt::WGradient::addColorStop ( const ColorStop & colorstop )

Adds a color stop.

◆ clearColorStops()

void Wt::WGradient::clearColorStops ( )

Removes all color stops.

See also: addColorStop()

◆ colorstops()

const std::vector<ColorStop>& Wt::WGradient::colorstops ( ) const

Returns the color stops.

See also: addColorStop()

◆ isEmpty()

bool Wt::WGradient::isEmpty ( ) const

Returns whether the gradient is empty.

A gradient is empty if no color stops are defined.

◆ linearGradientVector()

const WLineF& Wt::WGradient::linearGradientVector ( ) const

Returns the line positioning the linear gradient.

This returns the line set in setLinearGradient().

◆ radialCenterPoint()

const WPointF& Wt::WGradient::radialCenterPoint ( ) const

Returns the center of a radial gradient.

This returns the center point set in setRadialGradient().

◆ radialFocalPoint()

const WPointF& Wt::WGradient::radialFocalPoint ( ) const

Returns the focal point of a radial gradient.

This returns the focal point set in setRadialGradient().

◆ radialRadius()

double Wt::WGradient::radialRadius ( ) const

Returns the radius of a radial gradient.

This returns the radius set in setRadialGradient().

◆ setLinearGradient()

void Wt::WGradient::setLinearGradient	(	double	x0,
		double	y0,
		double	x1,
		double	y1
	)

Configures a linear gradient.

The coordinates describe a line which provides an origin and orientation of the gradient in user-space coordinates.

◆ setRadialGradient()

void Wt::WGradient::setRadialGradient	(	double	cx,
		double	cy,
		double	r,
		double	fx,
		double	fy
	)

Configures a radial gradient.

A radial gradient is described by a center, a radial and a focus point. All coordinates are user-space coordinates.

◆ style()

GradientStyle Wt::WGradient::style ( ) const

Returns the gradient style.

See also: setLinearGradient(), setRadialGradient()

Classes

Public Member Functions