Re: Update progress bar without returning to main loop?

[Armin Burgmeier <armin arbur net>]

I do not think that this approch will work: GTK+ just pushes events like 
timer or idle calls onto the event queue and will execute them (e.g. 
call corresponding signal handlers) when gtk_main() regains control.

If the calculation which should show the progress bar takes long time, 
timer events will not be emitted during this period (except that the 
calculation function calls Gtk::Main::iteration()) but delayed until the 
calculation has finished. No progressbar update will be visible.

 - Armin