Re: Drawing area force refresh

[John Coppens <john jcoppens com>]

On Sun, 11 Jul 2004 21:43:48 +1000
Nghia <nho optushome com au> wrote:

> Hi,
>
> I'm trying to make my own progress bar by drawing to a drawing area
> widget.
>
> This is my test code.
>
> for(i=0; i < 100; i++)
> {
>        g_printf("Percent: %d\n", i);
>        DrawProgessBar(drawing_area, pixmap, i);
>        g_usleep(100000);
>  }
>
> I have added code to update the drawing_area inside DrawProgressBar but 
> it doesn't refresh in sync with the g_printf. The animation is rather 
> "jerky".
>
> Any ideas on how to make it in sync with the loop?

Could it be you have to to call gtk_main_iteration() in leach loop to
allow GTK to update the screen?

Depending on how you draw, you may have to call
gdk_window_invalidate_region() to indicate part of the image has been
modified.

John