diff options
Diffstat (limited to 'src/Fl_Gl_Window.cxx')
| -rw-r--r-- | src/Fl_Gl_Window.cxx | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/src/Fl_Gl_Window.cxx b/src/Fl_Gl_Window.cxx index 47a79cb2d..65c4a0e8d 100644 --- a/src/Fl_Gl_Window.cxx +++ b/src/Fl_Gl_Window.cxx @@ -25,20 +25,6 @@ // http://www.fltk.org/str.php // -/** \fn virtual void Fl_Gl_Window::draw(void) - Fl_Gl_Window::draw() is a pure virtual method. You must - subclass Fl_Gl_Window and provide an implementation for - draw(). You may also provide an implementation of draw_overlay() - if you want to draw into the overlay planes. You can avoid - reinitializing the viewport and lights and other things by checking - valid() at the start of draw() and only doing the - initialization if it is false. - <P>The draw() method can <I>only</I> use OpenGL calls. Do not - attempt to call X, any of the functions in <FL/fl_draw.H>, or glX - directly. Do not call gl_start() or gl_finish(). </P> - <P>If double-buffering is enabled in the window, the back and front - buffers are swapped after this function is completed. -*/ #include "flstring.h" #if HAVE_GL @@ -510,6 +496,22 @@ void Fl_Gl_Window::draw_overlay() {} #endif + /** + You <b>must</b> subclass Fl_Gl_Window and provide an implementation for + draw(). You may also provide an implementation of draw_overlay() + if you want to draw into the overlay planes. You can avoid + reinitializing the viewport and lights and other things by checking + valid() at the start of draw() and only doing the + initialization if it is false. + <P>The draw() method can <I>only</I> use OpenGL calls. Do not + attempt to call X, any of the functions in <FL/fl_draw.H>, or glX + directly. Do not call gl_start() or gl_finish(). </P> + <P>If double-buffering is enabled in the window, the back and front + buffers are swapped after this function is completed. +*/ +void Fl_Gl_Window::draw() { + Fl::fatal("Fl_Gl_Window::draw() *must* be overriden. Please refer to the documentation."); +} // // End of "$Id$". // |