Path: utzoo!attcan!uunet!munnari!otc!metro!kylie!steven
From: steven@kylie.oz (Steven Sweeting)
Newsgroups: comp.cog-eng
Subject: Re: The Window Focus Problem
Message-ID: <530@kylie.oz>
Date: 22 Dec 88 05:31:34 GMT
References: <318@aratar.UUCP> <651@sdics.ucsd.EDU> <1073@arctic.nprdc.arpa> <663@sdics.ucsd.EDU> <dfaFK09aNA1010vk5y2@amdahl.uts.amdahl.com> <14> <Dec> <88> <19:32:32> <GMT> <4853@enterprise.UUCP>
Reply-To: steven@kylie.oz (Steven Sweeting)
Organization: Optech Research Pty Ltd, Sydney AUSTRALIA
Lines: 38

>In article <dfaFK09aNA1010vk5y2@amdahl.uts.amdahl.com> johnm@amdahl.uts.amdahl.com (John Murray) writes:
>
>DE-FOCUS vers 2.0
>
>	a) reserve a bitplane (ie. the highest) for this purpose.
>
>	b) arrange the colour lookup table so that all colours which have '1'
>	in the selected bitplane are "full colour" while those colours which
>	have '0' are shown at some %age of the desired "full" colour.
>
>       c) Draw a FILLED RECT on the selected bitplane (only) over the areas
>	which have "focus"

I implemented this on an Amiga with a slight twist.  I used the extra
bitplane to give a different background colour to the active window.
i.e. Normally white on black, active white on dark red.

I quite liked it and would be  using it all the time
but for some reason after about 5 minutes my free list
(Amigas have 1 per machine) was torn to bits. (O/S bug of course :-))
Being one bit-plane and a solid rectangular shape, it was always faster
than the screen could refresh.

For amigans, I added a dual-playfield to Workbench, which meant my
own personalised bit-plane which didn't interfere with Workbench's colour
set.

>P.S.   While I'm posting, does anybody have any ideas on how to reflect that
>	  a given window is "Out of Date" (ie. MAY contain invalid data) ??

Clear the window.  :-)/2

_____"I must create a system or be enslaved by another man's"__-Blake
Steven Sweeting		  ACSnet: steven@kylie.oz
Optech Research Pty. Ltd. Internet: steven@kylie.oz.au@uunet.uu.net
Level 60, MLC Centre,     PH  +61(2) 235-0255      __   __
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