[plt-scheme] GUI redraw speed/show and scrolling

On 8/26/05, Matthew Flatt <mflatt at cs.utah.edu> wrote:
> At Fri, 26 Aug 2005 13:07:08 -0500, Corey Sweeney wrote:
> > Hi, I've set up a GUI with lots of buttons and nested panels.  When it
> > draws a new window, it can take up to 15 seconds.  However, doing the
> > same thing under gtk, takes under 1.
> >
> > I was thinking the problem might be that I was allowing the gui to
> > display while it was adding all the panels (you can see it "building
> > up" the window piece by piece), so I tried
> >
> > (send main-panel show #f)
> > {add sub-panels and buttons}
> > (send main-panel show #t)
> >
> > but this didn't seem to help.  Is there anything I can do to speed it up?
> 
> Even when a window is hidden (but not deleted), it contributes to its
> parent's geometry.
> 
> Does
> 
>  (send main-panel begin-container-sequence)
>  {add sub-panels and buttons}
>  (send main-panel end-container-sequence)
> 
> help?

Yes!   I'm down from 15 seconds to 4 seconds.  While 4 seconds is
still a ways from perfect, it's much more usable now.  Thanks

> 
> > Also, I'd like to be able to scroll one of my panels.  There seems to
> > be a "scroll canvas", but if i'm correct in what i'm reading, a canvas
> > is a container that can't hold buttons (or other controlls).  Is there
> > any way to get a panel to scroll?
> 
> There's currently no support for scrolling panels. It's on a list of
> things to add (eventually).
> 
> Matthew
> 
>