Newsgroups: comp.windows.x.motif
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!swbatl!uuciks
From: uuciks@swbatl.sbc.com (Kristina Smith - UCI - 5-3793)
Subject: XmList problem (coredump)
Message-ID: <1991Jun5.182759.23939@swbatl.sbc.com>
Keywords: XmListAddItem, coredump  
Organization: Southwestern Bell
Date: Wed, 5 Jun 91 18:27:59 GMT


Has anyone ever seen this behavior before?

(Please note that I am an X11 and Motif programming novice)
(I'm running Motif 1.1)

I create a selectionBoxDialog like this:
 
selectionBox = XmCreateSelectionDialog(parent,"selectionBox",args,argcnt);

I create an XmStringTable filled with data and use XtSetArgs to make it the
item list for the selection box like this:

XtSetArg(args[argcnt], XmNlistItems, (XmStringTable)items); argcnt++;
XtSetArg(args[argcnt], XmNlistItemCount, (int)itemcount); argcnt++;

One of the pushButtons has a callback tied to it that deletes the current list
and adds new items to the list somewhat like the following:

XtUnmanageChild(list);
XmListDeleteAllItems(list);
XmListAddItem(list,xmstring,0);
XtManageChild(list);

Then when I try to select an item from the new list it coredumps with a memory
fault (segmentation violation) (not all the time, though.  It's very sporadic) 

When I use a debugger on it, and do a trace, this is what shows up:
_DrawHighlight(0x1ac2a8,0x3,0x1,0x1,0x20000,0x3) + c4
_ListFocusIn(0x1ac2a8,0xf7ffe7e4,0x0,0x19ad78,0x25,0x26838) + b0
__XtTranslateEvent(0x1ac2a8,0x0,0xf7ffe7e4,0x630,0x174d74,0x19ad70) + 360
_DispatchEvent(0xf7ffe7e4,0x1ac2a8,0x200000,0x0,0xf7ffe588,0xf7ffe3f8) + 328


Does anyone know what is happening or why it might be happening?

I would appreciate any thoughts or experiences at all!  I'm on a tight
deadline, and I can't seem to get past this!

Thanks!
Kristina Smith
kms@strider.sbc.com
314-235-3793
Southwestern Bell Telephone