Path: utzoo!attcan!uunet!lll-winken!indri!unmvax!tut.cis.ohio-state.edu!bloom-beacon!GROUCH.JPL.NASA.GOV!PJS
From: PJS@GROUCH.JPL.NASA.GOV (Peter Scott)
Newsgroups: comp.windows.x
Subject: Contents of windows
Message-ID: <890422145257.00001135181@grouch.JPL.NASA.GOV>
Date: 22 Apr 89 22:52:57 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 13

I just started learning X-Windows, and had assumed that if a window were
obscured or closed, that X would save its contents and automatically
restore them when the window or part of window became displayable.  But
from my reading it appears that redisplay is the responsibility of the
programmer.  Let me get this straight.  If, for instance, I am writing
a painting program, then either I have to keep a journal of all the user's
paint commands, and replay them whenever I am redisplayed, or I have to
save the bitmap for the window each time the window is modified, and
restore from that if I am obscured?  Suppose I have backing store supported
and enabled.  Does X automatically restore the contents of the window in
this case?

Peter Scott (pjs@grouch.jpl.nasa.gov)