Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!apple!well!mjf
From: mjf@well.sf.ca.us (Marty Fried)
Newsgroups: comp.sys.mac.programmer
Subject: List Mgr with TCL
Summary: lUpdate problem
Keywords: TCL, List Manager
Message-ID: <25064@well.sf.ca.us>
Date: 27 May 91 19:01:18 GMT
References: <1991May22.124357.5348@bmers95.bnr.ca> <13641@goofy.Apple.COM>
Distribution: usa
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 27

Can anyone offer advice on using the List Mgr with TCL?  I am using it
in a floating window, and have at least one problem.  It won't display
the list until I resize the window.  It then works fine until I either
obscure certain parts of it, or re-enable it after switching to another
window (which makes this one disappear).  The lUpdate function gets called,
but nothing happens.  I've been able to make it display initially, by using
a begin/end update, but then it just sits there and ignores me (it does get
sent the lClick message, though).  Could it have something to do with the
update regions?  I'm still somewhat of a novice, and I don't fully understand
how this works. Is there more than one update region?  It seems like there
may be.  Are they available for viewing in the debugger?  
 One thing that confuses me.  The lUpdate function requires the ListHandle and
the RgnHandle.  Is the RgnHandle the same one that is available by examining
the port structure in the list record?  If so, why pass both, when just the
listHandle should suffice?
 To use the LM, I did a subclass of CWindow, and added the code for lUpdate,
lActivate, and lClick to the CWindow's appropriate (I think) methods.  I've
tried various orders of doing this, but nothing seems to fully work.  Does
my strategy make sense?  Do I make sense? :)  
 I would be very grateful if anyone can give me suggestions.  I've read and
reread everything I could find on the subject, with no help.  And once I
resize the window, it works correctly.
 BTW, it is a color-selection palette, that displays colors in boxes, with
the name of the color adjacent to the box.
   Marty Fried                 +-+-+-+-+-+-+-+-+-+-+-+
   SlideTek, Inc.              + This space for rent +
   Sausalito, Calif.           +-+-+-+-+-+-+-+-+-+-+-+