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Replacing presentations (repost)

    Date: Tue, 5 Jul 1994 10:53 PDT
    From: Scott McKay <swm@harlequin.com>

       From: Robert Pfeiffer <rdp@netcom.com>
       Date: Tue, 5 Jul 1994 09:15:13 -0700 (PDT)

       [...]

       Problem #2:
       Something in the output recording protocol becomes seriously broken. One
       clear aspect of this is that presentations disappear and reappear in new
       positions when the window is scrolled.

    You are probably not obeying the overly complicated output record
    coordinate protocols.  This is no surprise because (1) they are not
    properly documented anywhere, and (2) they're way to complicated to
    figure out if you don't have source code.  (In fact, even if you do
    have source code, you'll still have problems figuring it out.)

Sounds intriguing... might this be covered in the CLIM II tutorial?

       Surely there must be a simple way to achieve my very modest goal.
       Would someone please put me out of my misery and tell me what it is? :-)

    Unless there is a compelling reason to do otherwise, I still think you
    are best of jus tusing UPDATING-OUTPUT at a fairly fine level of
    granularity.  

OK. My non-compelling reason was that I orginally had made the window
pane use incremental redisplay but it has quite a few push button gadgets
for which I wasn't able to suppress redisplay. I'll go back and work on
this problem now.

                 There are some people who could probably get approach #2
    working, but I know that this person probably won't be able to scrape
    up the time to help you, unless you happen to be using LispWorks.  (I
    wish it were otherwise, but I'm really just swamped.)

You've helped quite a bit already. Thanks!
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