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- From: mouse@thunder.mcrcim.mcgill.edu (der Mouse)
- Newsgroups: comp.windows.open-look,comp.windows.x
- Subject: Re: OLIT PopupWindowShell woes
- Message-ID: <1992Nov7.111601.20880@thunder.mcrcim.mcgill.edu>
- Date: 7 Nov 92 11:16:01 GMT
- References: <Bx3z7B.47t@tridom.com> <4228@cvbnetPrime.COM>
- Organization: McGill Research Centre for Intelligent Machines
- Lines: 25
-
- In article <4228@cvbnetPrime.COM>, aperez@caribe.prime.com (Arturo Perez x6739) writes:
- > wht@gatekeeper.mis.tridom.com (Warren H. Tucker) writes:
- >> [problem with a window not refreshing when it should]
- > This is a bug in the Sun OpenWindows server (xnews). [...]
-
- > Popup windows use backing store (y'know, so that they don't have to
- > refresh what lies underneath).
-
- That's not what backing-store does. A popup should use save-under.
- (Some servers may implement this by using the backing-store mechanisms,
- which is not the same thing.)
-
- Backing-store is a hint you set on a window that says that it would
- probably be worthwhile to save what's in the window when it's obscured.
- Save-under is a hint you set on a window that says that it would
- probably be worthwhile to save what the window obscures.
-
- To put it another way, if window A obscures window B, you can hint
- about saving the obscured area by setting save-under on window A or
- backing-store on window B.
-
- der Mouse
-
- mouse@larry.mcrcim.mcgill.edu
-