Path: utzoo!attcan!uunet!snorkelwacker!bloom-beacon!MAPS.CS.CMU.EDU!Jean-Christophe.Dhellemmes
From: Jean-Christophe.Dhellemmes@MAPS.CS.CMU.EDU
Newsgroups: comp.windows.x
Subject: Athena List Widget
Message-ID: <9006071311.AA01232@ATHENA.MIT.EDU>
Date: 7 Jun 90 13:10:10 GMT
Sender: root@athena.mit.edu (Wizard A. Root)
Organization: The Internet
Lines: 29


Hi X11R4 experts,

I am using the Athena toolkit under X11R4 and I am dealing with a "List"
widget inside a "Viewport" widget, for which I force a vertical scrollbar. I
want to scroll the list up and down and select a line. I am dealing with
very long lists:

* I have no problem with a moderately sized list (48 elements).

* For a long list (1112 elements), the scrolling works OK, but when I try to
  select elements near the end of the list, they don't appear in reverse
  video anymore, they disappear instead until another line is clicked on.
  Eventually, I lose control and have to kill the server...

* For a huge list (8395 elements), the scrolling is kind of weird. The thumb
  in the scroll bar has its minimum thickness (sounds noraml), but the bottom
  of the view port is reached well before the thumb is at the bottom position
  (i.e. position 100% is actually about 70%). Selecting lines at the beginning
  of the list is OK, but as soon as I try selecting a line at the end of the
  list, I lose control and the server dies badly.

Questions:

1) Can somebody explain what's going on ?
2) Is there a (settable) limit to the number of entries in a list widget ?
3) Is it a bug in X11R4 ? Is there a patch for it ?

Thanks.							* JCD