Cairo support functions and classes


Classes

class  Fl_Cairo_State
 Contains all the necessary info on the current cairo context. More...
class  Fl_Cairo_Window
 This defines a pre-configured cairo fltk window. More...

Functions

static bool Fl::cairo_autolink_context ()
 Gets the current autolink mode for cairo support.
static void Fl::cairo_autolink_context (bool alink)
 when HAVE_CAIRO is defined and cairo_autolink_context() is true, any current window dc is linked to a current context.
static void Fl::cairo_cc (cairo_t *c, bool own=false)
 Sets the current cairo context to c.
static cairo_t * Fl::cairo_cc ()
 Gets the current cairo context linked with a fltk window.
static cairo_t * Fl::cairo_make_current (Fl_Window *w)

Function Documentation

static bool Fl::cairo_autolink_context (  )  [inline, static, inherited]

Gets the current autolink mode for cairo support.

Return values:
false if no cairo context autolink is made for each window.
true if any fltk window is attached a cairo context when it is current.
See also:
void cairo_autolink_context(bool alink)
Note:
Only available when configure has the --enable-cairo option

static void Fl::cairo_autolink_context ( bool  alink  )  [inline, static, inherited]

when HAVE_CAIRO is defined and cairo_autolink_context() is true, any current window dc is linked to a current context.

This is not the default, because it may not be necessary to add cairo support to all fltk supported windows. When you wish to associate a cairo context in this mode, you need to call explicitly in your draw() overridden method, FL::cairo_make_current(Fl_Window*). This will create a cairo context but only for this Window. Still in custom cairo application it is possible to handle completely this process automatically by setting alink to true. In this last case, you don't need anymore to call Fl::cairo_make_current(). You can use Fl::cairo_cc() to get the current cairo context anytime.

Note:
Only available when configure has the --enable-cairo option

static void Fl::cairo_cc ( cairo_t *  c,
bool  own = false 
) [inline, static, inherited]

Sets the current cairo context to c.

Set own to true if you want fltk to handle this cc deletion.

Note:
Only available when configure has the --enable-cairo option

static cairo_t* Fl::cairo_cc (  )  [inline, static, inherited]

Gets the current cairo context linked with a fltk window.


FLTK © 1998-2010 by Bill Spitzak and others.    Permission is granted to reproduce this manual or any portion for any purpose, provided this copyright and permission notice are preserved.