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diff --git a/common/fltk/FL/Fl_Cairo_Window.H b/common/fltk/FL/Fl_Cairo_Window.H
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+//
+// "$Id: Fl_Cairo_Window.H 8198 2011-01-06 10:24:58Z manolo $"
+//
+// Main header file for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2010 by Bill Spitzak and others.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+/* \file
+    Fl_Cairo_Window Handling transparently a fltk window incorporte a cairo draw callback.
+*/
+
+#ifndef FL_CAIRO_WINDOW_H
+# define FL_CAIRO_WINDOW_H
+# ifdef FLTK_HAVE_CAIRO
+
+// Cairo is currently supported for the following platforms:
+// Win32, Apple Quartz, X11
+#  include <FL/Fl.H>
+#  include <FL/Fl_Double_Window.H>
+
+/** 
+   \addtogroup group_cairo
+   @{
+*/
+
+/**
+   This defines a pre-configured cairo fltk window.
+   This class overloads the virtual draw() method for you,
+   so that the only thing you have to do is to provide your cairo code.
+   All cairo context handling is achieved transparently.
+   \note You can alternatively define your custom cairo fltk window,
+   and thus at least override the draw() method to provide custom cairo
+   support. In this case you will probably use Fl::cairo_make_current(Fl_Window*)
+   to attach a context to your window. You should do it only when your window is 
+   the current window. \see Fl_Window::current()
+*/
+class FL_EXPORT Fl_Cairo_Window : public Fl_Double_Window {
+
+public:
+  Fl_Cairo_Window(int w, int h) : Fl_Double_Window(w,h),draw_cb_(0) {}
+
+protected:
+  /** Overloaded to provide cairo callback support */
+  void draw() {
+    Fl_Double_Window::draw();
+    // manual method ? if yes explicitly get a cairo_context here
+    if (!Fl::cairo_autolink_context()) 
+      Fl::cairo_make_current(this); 
+    if (draw_cb_) draw_cb_(this, Fl::cairo_cc());
+  }
+
+public:
+  /** This defines the cairo draw callback prototype that you must further */
+  typedef void (*cairo_draw_cb) (Fl_Cairo_Window* self, cairo_t* def);
+  /** 
+    You must provide a draw callback which will implement your cairo rendering.
+    This method will permit you to set your cairo callback to \p cb.
+  */
+  void set_draw_cb(cairo_draw_cb  cb){draw_cb_=cb;}
+private:
+    cairo_draw_cb draw_cb_;
+};
+
+
+/** @} */
+
+# endif // FLTK_HAVE_CAIRO
+#endif // FL_CAIRO_WINDOW_H
+
+//
+// End of "$Id: Fl_Cairo_Window.H 8198 2011-01-06 10:24:58Z manolo $" .
+//