Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!sun-barr!oliveb!amiga!cbmvax!peter
From: peter@cbmvax.commodore.com (Peter Cherna)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Mutual Exclude Gadgets
Message-ID: <9161@cbmvax.commodore.com>
Date: 28 Dec 89 19:51:48 GMT
References: <5802@sdcc6.ucsd.edu> <8912272145.AA23577@en.ecn.purdue.edu>
Reply-To: peter@cbmvax.commodore.com (Peter Cherna)
Organization: Commodore, West Chester, PA
Lines: 61

In article <8912272145.AA23577@en.ecn.purdue.edu> bevis@EE.ECN.PURDUE.EDU (Jeff Bevis) writes:
>In article <5802@sdcc6.ucsd.edu>, pa2027@sdcc13.ucsd.edu (Stupendous Man) writes:
>>
>>Could someone please explain (perhaps with a bit of Lattice C) how
>>to use the mutual exclude flag in the Gadget structure?  The Sybex
>
>It doesn't function!  (ie, it's not implemented)
>That's a shame, too, because writing exclusion code over and over is a
>real nuisance. 

The latest AmigaMail has an article on the correct supportable way
of handling mutual exclusion of gadgets.

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>By the way, how does one preset and adjust TOGGLESELECT GADGHCOMP type
>gadgets?  I always get weird results with them... Any suggestions, like
>RefreshGList()'ing in some creative fashion?

To quote from the Enhancer 1.2 Manual, which some (not all) of you
have:

"Understand that Boolean gadget rendered with Borders (instead of
Images) or highlighted with surrounding boxes (GADGHBOX) are handled
very simply by Intuition, and that complicated transitions done by
your program (and in some cases the user's own actions) can get
the rendering out of phase."

To summarize, if you want to preset and adjust TOGGLESELECT gadgets
they should be rendered with Images (that exactly match the select
box in size and position) and highlighted by complementing (GADGHCOMP)
or by an alternate image of the same size and position.  As well,
the gadgets must be GADGIMMEDIATE.

In other words, you cannot do proper programmatic control of gadgets
rendered with borders and text, and highlighted by complementing.
If you should happen to find some combination of steps that appears
to work, heed this warning:  ***You may be counting on side-effects
that we don't promise to maintain in future releases of the operating
system***.

>+--------------------------------+--------------------------------------------+
>| Jeff Bevis 		         | "But I don't like spam!"		      |
>| bevis@en.ecn.purdue.edu	 | 	     Give me Amiga or nothing at all. |
>+--------------------------------+--------------------------------------------+
--
     Peter Cherna, Software Engineer, Commodore-Amiga, Inc.
     {uunet|rutgers}!cbmvax!peter    peter@cbmvax.cbm.commodore.com
My opinions do not necessarily represent the opinions of my employer.

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