Cairo::LinearGradient Class Reference

Inheritance diagram for Cairo::LinearGradient:

Public Member Functions
	LinearGradient (cairo_pattern_t*cobject, bool has_reference=false)
	Create a C++ wrapper for the C instance. More...
void	get_linear_points (double& x0, double& y0, double& x1, double& y1) const
	~LinearGradient () override
Public Member Functions inherited from Cairo::Gradient
	Gradient (cairo_pattern_t*cobject, bool has_reference=false)
	Create a C++ wrapper for the C instance. More...
	~Gradient () override
void	add_color_stop_rgb (double offset, double red, double green, double blue)
	Adds an opaque color stop to a gradient pattern. More...
void	add_color_stop_rgba (double offset, double red, double green, double blue, double alpha)
	Adds a translucent color stop to a gradient pattern. More...
std::vector< ColorStop >	get_color_stops () const
	Gets the color stops and offsets for this Gradient. More...
Public Member Functions inherited from Cairo::Pattern
	Pattern (cairo_pattern_t*cobject, bool has_reference=false)
	Create a C++ wrapper for the C instance. More...
	Pattern (const Pattern&)=delete
Pattern&	operator= (const Pattern&)=delete
virtual	~Pattern ()
void	set_matrix (const Matrix& matrix)
	Sets the pattern's transformation matrix to . More...
void	get_matrix (Matrix& matrix) const
	Returns the pattern's transformation matrix. More...
Matrix	get_matrix () const
	Returns the pattern's transformation matrix. More...
void	set_matrix (const cairo_matrix_t& matrix)
void	get_matrix (cairo_matrix_t& matrix) const
PatternType	get_type () const
	Returns the type of the pattern. More...
void	set_extend (Extend extend)
	Sets the mode to be used for drawing outside the area of a pattern. More...
Extend	get_extend () const
	Gets the current extend mode See Cairo::Extend for details on the semantics of each extend strategy. More...
cobject*	cobj ()
const cobject*	cobj () const
void	reference () const
void	unreference () const

Static Public Member Functions
static RefPtr< LinearGradient >	create (double x0, double y0, double x1, double y1)
	Create a new linear gradient Cairo::Pattern along the line defined by (x0, y0) and (x1, y1). More...

Protected Member Functions
	LinearGradient (double x0, double y0, double x1, double y1)
Protected Member Functions inherited from Cairo::Gradient
	Gradient ()
Protected Member Functions inherited from Cairo::Pattern
	Pattern ()

Additional Inherited Members
Public Types inherited from Cairo::Pattern
typedef cairo_pattern_t	cobject
Protected Attributes inherited from Cairo::Pattern
cobject*	m_cobject

Constructor & Destructor Documentation

Cairo::LinearGradient::LinearGradient ( double  x0, double  y0, double  x1, double  y1  )

protected

Cairo::LinearGradient::LinearGradient ( cairo_pattern_t *  cobject, bool  has_reference = false  )

explicit

Create a C++ wrapper for the C instance.

This C++ instance should then be given to a RefPtr.

Parameters

cobject	The C instance.
has_reference	Whether we already have a reference. Otherwise, the constructor will take an extra reference.

Cairo::LinearGradient::~LinearGradient ( )

override

Member Function Documentation

static RefPtr<LinearGradient> Cairo::LinearGradient::create ( double  x0, double  y0, double  x1, double  y1  )

static

Create a new linear gradient Cairo::Pattern along the line defined by (x0, y0) and (x1, y1).

Before using the gradient pattern, a number of color stops should be defined using Cairo::Gradient::add_color_stop_rgb() or Cairo::Gradient::add_color_stop_rgba().

Note: The coordinates here are in pattern space. For a new pattern, pattern space is identical to user space, but the relationship between the spaces can be changed with Cairo::Pattern::set_matrix().

Parameters

x0	x coordinate of the start point
y0	y coordinate of the start point
x1	x coordinate of the end point
y1	y coordinate of the end point

void Cairo::LinearGradient::get_linear_points	(	double &	x0,
		double &	y0,
		double &	x1,
		double &	y1
	)		const

Parameters

x0	return value for the x coordinate of the first point
y0	return value for the y coordinate of the first point
x1	return value for the x coordinate of the second point
y1	return value for the y coordinate of the second point

Gets the gradient endpoints for a linear gradient.

Since

1.4

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The documentation for this class was generated from the following file:

• cairomm/pattern.h