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- Newsgroups: comp.windows.x
- Path: sparky!uunet!convex!darwin.sura.net!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!organ!ware
- From: ware@organ.cis.ohio-state.edu (Peter Ware)
- Subject: Re: What would this window obscure?
- In-Reply-To: thg@cam-orl.co.uk's message of 3 Sep 92 15: 41:13 GMT
- Message-ID: <WARE.92Sep3135501@organ.cis.ohio-state.edu>
- Originator: ware@organ.cis.ohio-state.edu
- Sender: news@cis.ohio-state.edu (NETnews )
- Organization: Ohio State Computer Science
- References: <RJC.92Aug27183542@daiches.cogsci.ed.ac.uk>
- <1992Sep3.154113.10359@cam-orl.co.uk>
- Distribution: comp
- Date: Thu, 3 Sep 1992 18:55:01 GMT
- Lines: 29
-
- In article <1992Sep3.154113.10359@cam-orl.co.uk> thg@cam-orl.co.uk
- (Tim Glauert) writes:
-
- ...
- Actually, it isn't, since the server has a lot of freedom about
- exacty which areas it returns in an expose event. It is allowed to
- generate expose events which cover obscured parts of a window and
- it is allowed to generate expose events on areas which are already
- visible. It is legal within the protocol specification for the
- server to send a single expose event covering the whole of a window
- whenever any part of it is uncovered.
- ...
-
- Pardon the technitrivia, but are you sure the server is allowed to
- generate expose events for visible regions? This would make it
- impossible for an application using a graphics function like XOR to
- function properly.
-
- If you meant that it can generate an Expose event but must clear it to
- the background then that sounds reasonable. In fact, I know the MIT server
- already does this if an operation causes more then 25 regions to be
- exposed -- they get combined into one region and cleared to the background.
-
- --pete
- --
- Pete Ware / Ohio State University /
- ware@cis.ohio-state.edu
- (614) 538-0965
- Too bad the Nike slogan isn't "Just Do It Right" instead of "Just Do It"
-