Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!bloom-beacon!EXPO.LCS.MIT.EDU!jim
From: jim@EXPO.LCS.MIT.EDU (Jim Fulton)
Newsgroups: comp.windows.x
Subject: Re: Simple programming quiz  [backing-store is a *hint*]
Message-ID: <8906301435.AA14851@expo.lcs.mit.edu>
Date: 30 Jun 89 14:35:25 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: X Consortium, MIT Laboratory for Computer Science
Lines: 13


> If it bothers you that much, just give your windows a backing-store
> hint of Always, or WhenMapped, or whatever your notion of a "real
> windowing system" provides, and then document that it won't work
> properly with servers that don't support "real windowing system"
> backing-store semantics.  After all, if X required such things, your
> program wouldn't run at all with such machines (they wouldn't havve
> *any* server), so you haven't lost any potential usefulness....

Don't forget to add that the application window could go blank at any time if
you ever obscure and then expose it....  A growing number of servers are
finally getting smart enough to throw away backing store when they start to run
out of memory.