On Mon, 2003-10-13 at 15:40, John Cupitt wrote:
> Hi all,
>
> I'm porting an app to gtk2 and I've come across some performance problems caused (I
> think) by gtk's new expose event compression system.
>
> One of the app's widgets is an image display window, and one of the tools is a
> panner. Pure left/right and up/down pans are fast and smooth, but diagonal drags are
> very choppy. I think this is because gtk is sending me the bounding box of all
> exposes since the last repaint, and for a diagonal drag, the bounding box of a thin
> strip down the right and a thin strip across the bottom is the entire window.
>
> Has anyone come across this before, and is there an easy solution?
>
> (in case it matters, it's a drawing area inside viewport inside a scrolled window,
> and it's being panned by setting new values for the adjustments and calling
> value_changed on the h and v adjustments separately)
You get the exact region in the expose event along with the bounding
box.
Regards,
Owen
_______________________________________________
gtk-list mailing list
[EMAIL PROTECTED]
http://mail.gnome.org/mailman/listinfo/gtk-list
