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- Newsgroups: comp.sys.apple2.gno
- Path: sparky!uunet!munnari.oz.au!metro!ipso!fawlty!johnmac
- From: johnmac@fawlty.towers.oz.au (John MacLean)
- Subject: Re: Multiple Desktop Applications
- Reply-To: johnmac@fawlty.towers.oz.au (John MacLean)
- Organization: Tower Technology, Sydney
- Date: Tue, 29 Dec 1992 21:39:59 GMT
- Message-ID: <1992Dec29.213959.1868@fawlty.towers.oz.au>
- References: <1992Dec28.220347.20730@fawlty.towers.oz.au> <bazyar.725609147@teal>
- Lines: 51
-
- In article <bazyar.725609147@teal> bazyar@teal.csn.org (Jawaid Bazyar) writes:
- >johnmac@fawlty.towers.oz.au (John MacLean) writes:
- >
- >>Would it be possible to:
- >>[.....]
- >>- In this way, have multiple applications running on the desktop under
- >>GNO, with each application running in a scaleable window with a menu bar.
- >>Has anyone given this (or something similar) some thought?
- >
- > John,
- > Lots of thought. First off, there are lots of programs that people
- >will (reasonably) expect to run from such an environment. The ones
- >I'm referring to, like modZap, soniqTracker, Finder, synthLab, Platinum
- >Paint, and many other, all write directly to the screen. This is a big
- >problem and it's highly unlikely anyone will ever change these apps
- >to not write directly to the screen.
- >
- > Other than that, what you noted above is just a few of the things
- >that Switch-It! does to make its application switching environment
- >work for most programs.
- > Jawaid Bazyar
-
- Just giving you a chance to plug Switch-It :-).
-
- Seriously, I didn't think Switch-It put applications into scaleable windows,
- I thought it JUST swapped out the entire screen (and all the toolset direct
- pages, stack, global data, etc, etc, etc). Otherwise you would still have
- the problem of programs writing directly to the screen.
-
- What I was proposing was that tool calls were patched so that Quickdraw,
- menu manager, etc, etc, were all actually only started once.
- When multiple applications tried to start up screen based toolsets the
- patch code would keep tables of virtual screens in windows, and only start
- the toolsets if they had not already been started.
- You wouldn't have direct page toolset conflict, because each toolset would
- only be started once.
- When toolcalls were made, the grafport etc would be set to the virtual
- window of the appropriate application (determined via a getpid() and a
- table lookup).
- Although this is extremely complicated (as is what you have achieved), this
- would allow (I would think) multiple desktop applications to multitask
- PRE-EMPTIVELY.
-
- As you suggested, this doesn't get around applications that write directly
- to the screen, and more than likely there are other very serious problems
- with existing applications.
- --
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- Snail: Tower Technology, 1 Apollo Pl, Home: +61 2 449 5930
- Lane Cove, NSW 2066, Australia.
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