forcing a a widget_queue_draw

["Adrian E. Feiguin" <afeiguin uci edu>]

Hi all.
   This is an example, but there are many cases when I want to do 
something similar:
Suppose that I change the state of a toggle button with 
gtk_toggle_button_set_active or gtk_widget_set_state. The widget just 
wont draw properly until I move the mouse pointer over it forcing an 
expose event. What's going on? in gtk-1 I would simply call 
gtk_widget_draw, but now, event calling gtk_widget_queue_draw, the 
widget won't update. Can anyone explain it to me, please?
Thanks!
<ADRIAN>