FLTK 1.3.0
Fl_Cairo_Window.H
00001 //
00002 // "$Id$"
00003 //
00004 // Main header file for the Fast Light Tool Kit (FLTK).
00005 //
00006 // Copyright 1998-2010 by Bill Spitzak and others.
00007 //
00008 // This library is free software; you can redistribute it and/or
00009 // modify it under the terms of the GNU Library General Public
00010 // License as published by the Free Software Foundation; either
00011 // version 2 of the License, or (at your option) any later version.
00012 //
00013 // This library is distributed in the hope that it will be useful,
00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016 // Library General Public License for more details.
00017 //
00018 // You should have received a copy of the GNU Library General Public
00019 // License along with this library; if not, write to the Free Software
00020 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00021 // USA.
00022 //
00023 // Please report all bugs and problems on the following page:
00024 //
00025 //     http://www.fltk.org/str.php
00026 //
00027 
00028 /* \file
00029     Fl_Cairo_Window Handling transparently a fltk window incorporte a cairo draw callback.
00030 */
00031 
00032 #ifndef FL_CAIRO_WINDOW_H
00033 # define FL_CAIRO_WINDOW_H
00034 # ifdef FLTK_HAVE_CAIRO
00035 
00036 // Cairo is currently supported for the following platforms:
00037 // Win32, Apple Quartz, X11
00038 #  include <FL/Fl.H>
00039 #  include <FL/Fl_Double_Window.H>
00040 
00057 class FL_EXPORT Fl_Cairo_Window : public Fl_Double_Window {
00058 
00059 public:
00060   Fl_Cairo_Window(int w, int h) : Fl_Double_Window(w,h),draw_cb_(0) {}
00061 
00062 protected:
00064   void draw() {
00065     Fl_Double_Window::draw();
00066     // manual method ? if yes explicitly get a cairo_context here
00067     if (!Fl::cairo_autolink_context()) 
00068       Fl::cairo_make_current(this); 
00069     if (draw_cb_) draw_cb_(this, Fl::cairo_cc());
00070   }
00071 
00072 public:
00074   typedef void (*cairo_draw_cb) (Fl_Cairo_Window* self, cairo_t* def);
00079   void set_draw_cb(cairo_draw_cb  cb){draw_cb_=cb;}
00080 private:
00081     cairo_draw_cb draw_cb_;
00082 };
00083 
00084 
00087 # endif // FLTK_HAVE_CAIRO
00088 #endif // FL_CAIRO_WINDOW_H
00089 
00090 //
00091 // End of "$Id$" .
00092 //