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FLTK - Fast Light Tool Kit - https://github.com/fltk/fltk - cross platform GUI development
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87 lines
2.8 KiB
87 lines
2.8 KiB
// |
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// "$Id$" |
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// |
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// Main header file for the Fast Light Tool Kit (FLTK). |
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// |
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// Copyright 1998-2008 by Bill Spitzak and others. |
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// |
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// This library is free software; you can redistribute it and/or |
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// modify it under the terms of the GNU Library General Public |
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// License as published by the Free Software Foundation; either |
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// version 2 of the License, or (at your option) any later version. |
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// |
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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// Library General Public License for more details. |
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// |
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// You should have received a copy of the GNU Library General Public |
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// License along with this library; if not, write to the Free Software |
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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// USA. |
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// |
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// Please report all bugs and problems on the following page: |
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// |
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// http://www.fltk.org/str.php |
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// |
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/* \file |
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Fl_Cairo_Window Handling transparently a fltk window incorporte a cairo draw callback. |
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*/ |
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#ifndef FL_CAIRO_WINDOW_H |
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# define FL_CAIRO_WINDOW_H |
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# ifdef HAVE_CAIRO |
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// Cairo is currently supported for the following platforms: |
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// Win32, Apple Quartz, X11 |
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# include <FL/Fl.H> |
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# include <FL/Fl_Double_Window.H> |
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/** |
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\addtogroup group_cairo |
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@{ |
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*/ |
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/** |
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This defines a pre-configured cairo fltk window. |
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This class overloads for you the virtual draw() method, |
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so that the only thing you have to do is to provide your cairo code. |
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All cairo context handling is achieved transparently. |
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\note You can alternatively define your custom cairo fltk window, |
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and thus at least override the draw() method to provide custom cairo |
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support. In this case you will probably use Fl::cairo_make_current(Fl_Window*) |
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to attach a context to your window. You should do it only when your window is |
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the current window. \see Fl_Window::current() |
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*/ |
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class FL_EXPORT Fl_Cairo_Window : public Fl_Double_Window { |
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public: |
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Fl_Cairo_Window(int w, int h) : Fl_Double_Window(w,h),draw_cb_(0) {} |
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/** Overloaded to provide cairo callback support */ |
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void draw() { |
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Fl_Double_Window::draw(); |
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// manual method ? if yes explicitly get a cairo_context here |
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if (!Fl::cairo_autolink_context()) |
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Fl::cairo_make_current(this); |
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if (draw_cb_) draw_cb_(this, Fl::cairo_cc()); |
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} |
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/** This defines the cairo draw calback prototype that you must further */ |
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typedef void (*cairo_draw_cb) (Fl_Cairo_Window* self, cairo_t* def); |
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/** |
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You must provide a draw callback which will implement your cairo rendering, |
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This method will permit you to set you \a cb cairo callback. |
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*/ |
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void set_draw_cb(cairo_draw_cb cb){draw_cb_=cb;} |
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private: |
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cairo_draw_cb draw_cb_; |
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}; |
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/** @} */ |
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# endif // HAVE_CAIRO |
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#endif // FL_CAIRO_WINDOW_H |
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// |
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// End of "$Id$" . |
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//
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