FLTK 1.3.8

Fl_Cairo_Window.H
1//
2// "$Id$"
3//
4// Main header file for the Fast Light Tool Kit (FLTK).
5//
6// Copyright 1998-2010 by Bill Spitzak and others.
7//
8// This library is free software. Distribution and use rights are outlined in
9// the file "COPYING" which should have been included with this file. If this
10// file is missing or damaged, see the license at:
11//
12// http://www.fltk.org/COPYING.php
13//
14// Please report all bugs and problems on the following page:
15//
16// http://www.fltk.org/str.php
17//
18
19/* \file
20 Fl_Cairo_Window Handling transparently a fltk window incorporte a cairo draw callback.
21*/
22
23#ifndef FL_CAIRO_WINDOW_H
24# define FL_CAIRO_WINDOW_H
25# ifdef FLTK_HAVE_CAIRO
26
27// Cairo is currently supported for the following platforms:
28// Win32, Apple Quartz, X11
29# include <FL/Fl.H>
30# include <FL/Fl_Double_Window.H>
31
48 class FL_EXPORT Fl_Cairo_Window : public Fl_Double_Window {
49
50 public:
51 Fl_Cairo_Window(int w, int h) : Fl_Double_Window(w,h),draw_cb_(0) {}
52
53 protected:
55 void draw() {
56 Fl_Double_Window::draw();
57 // manual method ? if yes explicitly get a cairo_context here
58 if (!Fl::cairo_autolink_context())
59 Fl::cairo_make_current(this);
60 if (draw_cb_) draw_cb_(this, Fl::cairo_cc());
61 }
62
63 public:
65 typedef void (*cairo_draw_cb) (Fl_Cairo_Window* self, cairo_t* def);
70 void set_draw_cb(cairo_draw_cb cb){draw_cb_=cb;}
71 private:
72 cairo_draw_cb draw_cb_;
73};
74
75
78# endif // FLTK_HAVE_CAIRO
79#endif // FL_CAIRO_WINDOW_H
80
81//
82// End of "$Id$" .
83//
Fl.H
Fl static class.
Fl_Cairo_Window
This defines a pre-configured cairo fltk window.
Definition: Fl_Cairo_Window.H:48
Fl_Cairo_Window::set_draw_cb
void set_draw_cb(cairo_draw_cb cb)
You must provide a draw callback which will implement your cairo rendering.
Definition: Fl_Cairo_Window.H:70
Fl_Cairo_Window::draw
void draw()
Overloaded to provide cairo callback support.
Definition: Fl_Cairo_Window.H:55
Fl_Double_Window
The Fl_Double_Window provides a double-buffered window.
Definition: Fl_Double_Window.H:40
Fl_Group::draw
void draw()
Draws the widget.
Definition: Fl_Group.cxx:738
Fl::cairo_cc
static cairo_t * cairo_cc()
Gets the current cairo context linked with a fltk window.
Definition: Fl.H:1313
Fl::cairo_autolink_context
static bool cairo_autolink_context()
Gets the current autolink mode for cairo support.
Definition: Fl.H:1311
Fl::cairo_make_current
static cairo_t * cairo_make_current(Fl_Window *w)
Provides a corresponding cairo context for window wi.
Definition: Fl_Cairo.cxx:75
- Copyright © 1998-2021 by Bill Spitzak and others.