Re: presentation actions

• To: Scott McKay <SWM@sapsucker.scrc.symbolics.com>
• Subject: Re: presentation actions
• From: "David A. Moon" <moon@brazil.cambridge.apple.com>
• Date: Thu, 07 Feb 91 19:38:47
• Cc: gadbois@cs.utexas.edu, SWM@sapsucker.scrc.symbolics.com, clim@BBN.COM

> Date: Thu, 7 Feb 1991 16:57-0500
> From: Scott McKay <SWM@sapsucker.scrc.symbolics.com>
> 
> 	    Date: Thu, 7 Feb 1991 12:03 EST
> 	    From: kanderso@dino.bbn.com
> 
>     OK, but then what is the canonical way of doing some side effect without
>     going through a command?  For example, suppose I wanted to have some
>     mosue-sensitive buttons that control what is being displayed like those
>     little triangle things in Mac OS 7 directory listings.  I though that
>     presentation actions would be the way to implement these.  Or is this
>     kind of usage considered to be OK?
> 
> I haven't yet seen MacOS 7, so I don't know what it is you are referring
> to.  If it is just redisplay of data that can take place independent of
> changing application state, then it might be OK.

That's what it is.  It's enabling or disabling showing the next level of
structure in a tree, and doesn't change any state aside from the display,
let alone interfering with commands.

0,,

• Re: presentation actions
• From: Scott McKay <SWM@sapsucker.scrc.symbolics.com>

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