Re: forcing immediate redraw on widget

[Gus Koppel <gtk spamkiller bytechase cx>]

Marc Santhoff wrote:

> > > How can the immediate redraw of a widget be forced using GTK+ 1.2?
> >
> > I think the following should work in GTK+ 1.2 and 2.x:
> >
> >     gtk_widget_queue_draw (widget_to_redraw);
> >     while (gtk_events_pending ())
> >         gtk_main_iteration ();
>
> Thank you for answering, although after testing this seems to be only
> one half of the solution.
>
> The other half would be to invalidate or mark the widget for
> redrawing, so that there are events to process. Apparently changing
> the background color on a widget (hscale in this case) does not do it.

Have you included the first half (the call to gtk_widget_queue_draw ())
into your test? Just changing simple attributes isn't enough indeed to
force a widget to be redrawn. gtk_widget_queue_draw () is supposed to do
excatly what you were suggesting: invalidate the the widget for
redrawing. See:

http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#gtk-widget-queue-draw
http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html#gtk-widget-queue-draw-area

If it still doesn't work using gtk_widget_queue_draw () I suspect either
a deficiency of GTK+ 1.2 or another bug in your program.