Re: forcing immediate redraw on widget

[Harring Figueiredo <harringf yahoo com>]

> /* Process and remove all previously pending events */
>     while (gtk_events_pending ())
>         gtk_main_iteration ();
> /* Verify that 0 == 0 still */
>     printf ("gtk_events_pending (should be 0): %d\n",
>             gtk_events_pending ());
> /* Invalidate widget, should generate new event */
>     gtk_widget_queue_draw (widget_to_redraw);
> /* Check whether GTK+ knows about a new event pending */
>     printf ("gtk_events_pending (should NOT be 0): %d\n",
>             gtk_events_pending ());
>
> If especially the second result is "0" then I would suspect an erroneous
> or missing implementation of gtk_widget_queue_draw () in GTK+ 1.2. 

   Err, I beg to differ. This is a very erroneous assumption -- The events are
assynchronous and they could happen just "in between" the call from
gtk_envents_pending and printf..  This is very likely since printf actually
causes a hardware interrupt.

   Again, don't assume that the program data will be unchanged on a
assynchroneous environment (Even if it is running on a single CPU).

Harring Figureiredo

   



        
                
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