Path: utzoo!attcan!uunet!lll-winken!ames!ig!bionet!agate!ucbvax!bloom-beacon!APPLE.COM!alan
From: alan@APPLE.COM (Alan Mimms)
Newsgroups: comp.windows.x
Subject: GrabServer/UngrabServer nesting?!?
Message-ID: <8904140209.AA11503@internal.apple.com>
Date: 14 Apr 89 02:09:08 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 19

Does it make sense to say that the server grabbing and ungrabbing
requests CAN'T be nested?  The sample server seems to implement this
functionality in a way that will NOT properly handle nesting of
grabs and ungrabs (where "properly" is defined as "in a way that works
when the user wishes ONLY the most recent grab to be ungrabbed, leaving
'outer nested' grabs active until they, in turn, are ungrabbed").

I note with interest that "twm" does nested grabs quite a lot.  When it
is adding a window to is managed list, it grabs the server and then
calls alot of other routines which eventually result in several
grab/ungrab combinations.  Finally, it does an ungrab -- ostensibly to
release the original server grab.

Does anyone have any comments?  Am I completely out to lunch?

Alan Mimms                                      My opinions are generally
Communications Product Development Group        pretty worthless, but
Apple Computer                                  they *are* my own...
"The company has new jobs and Jobs has a new company" -- Harry Anderson