Re: Redrawing a widget

[Leonardo Zide <leonardo centroin com br>]

Ignacio Nodal wrote:
> 
> Hi, i'm working on an OpenGL project using GTK+ & GtkGLArea. My question
> is... how can i force a widget to be redraw? Not by an expose event, but at
> anytime.
> A simple example, suppose i want to clear the widget contents, call the
> glClear function and then i call gtk_widget_draw passing the widget and the
> area i want to be redraw, but it doesn't work.. is this a problem with
> OpenGL code or GTK+ one?? I mean.. Is gtk_widget_draw the correct way to
> redraw any kind of widget?

  When you want to redraw a widget, call gtk_widget_draw (widget,
(GdkRectangle*)NULL);

  Then on your expose handler you call glClear, do the drawing and call
glXSwapBuffers (or the GtkGLArea equivalent).

Leonardo