Cairo::LinearGradient Class Reference
Inheritance diagram for Cairo::LinearGradient:
[legend]

## 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
virtual | ~LinearGradient ()
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...
virtual | ~Gradient ()
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.

virtual Cairo::LinearGradient::~LinearGradient | ( |  | ) |

virtual

## 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

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

- cairomm/pattern.h