Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!uunet!mcsun!ukc!strath-cs!prlhp1!blanchar
From: blanchar@prlhp1.prl.philips.co.uk (blanchar)
Newsgroups: comp.windows.open-look
Subject: Re: XView scrolling list bug?
Summary: A fix for scrolling bug?
Message-ID: <1272@prlhp1.prl.philips.co.uk>
Date: 4 Mar 91 09:46:22 GMT
References: <23080@hydra.gatech.EDU>
Reply-To: blanchar@prl.philips.co.uk
Organization: Philips Research Laboratories, Redhill, UK
Lines: 51

In article <23080@hydra.gatech.EDU>, gw18@prism.gatech.EDU (Greg Williams) writes:
> 
> The following program produces an intermitant "Memory fault" crash.  Its
> occuring sometime before the routine "dir_proc" is called.  The crash is
> somewhere inside "xv_get".  It takes a few minutes of playing and changing
> directories to get the initial crash, but after it crashes once, I can
> usually reproduce the crash, but not every time.  I've run this code on a
> 4/65 and a 4/490, and get the same error.  I'm running Open Windows as
> supplied by Sun.  Can anyone tell me if I'm doing something wrong with
> the XView code?  The crash occurs too often to ignore it.  I appreciate any
> and all help I get.
> 
> ----code begins here----

I did a very similar thing but with only one scrolling list and had the
same problem.
This is where the problem is I think.....

> /*
>  * Hide the scroll lists while re-computing the lists.  Saves on re-draw
>  * time.
>  */
> 
>   xv_set(pi_dir,
>     XV_SHOW,		FALSE,
>     NULL);
> 
>   xv_set(pi_file,
>     XV_SHOW,		FALSE,
>     NULL);
> 
ETC..

What I did was this.

xv_set(list,XV_SHOW,FALSE,NULL);
xv_destroy_safe(list);
create_list(list);
/* create_list() is easy if you're using guide since it generates
functions  to create all it's objects and all you have to do is call 
the correct one */
xv_set(list,XV_SHOW,FALSE,NULL);
/* this last XV_SHOW,FALSE is here to make sure it doesn't show the
list until it is completed */
Then add the entries to the list as before. You don't need the
PANEL_LIST_INSERT if it's going at the end.
xv_set(list,XV_SHOW,TRUE,NULL);

I hope this helps. It worked for me!

Simon Blanchard