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1994-08-27
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Date: Thu, 30 Jun 94 02:58 BST-1
From: Ofir Gal <ogal@cix.compulink.co.uk>
Subject: Re: text marks & sliders
To: gem-list@world.std.com
Message-Id: <memo.520908@cix.compulink.co.uk>
Precedence: bulk
In message <9406292259.AA22172@uqcspe.cs.uq.oz.au>, warwick@cs.uq.oz.au said:
>
>The technique of maintaining 2 bounding rectangles is feasible, but not
>a trivial programming task. It could provide other benefits though,
>such as point-to-type, etc. but all these things are major changes to
>the GEM std interface. GEM just isn't designed to generate large
>numbers of mouse-in-area events. If Atari had provided a high-powered
>GEM library at the start, all this could have been implemented. I
>wonder even if DRI originally planned this, and that was the reason for
>providing the 2 rectangle areas (using 2, any number can be efficiently
>tracked... by extra library code).
I use the 2 rect method in my popup and window menu library. The logic
took a while to work out, but I could easily implement the changing mouse
idea using a similar system. It's all in BASIC BTW.
Bye,
Ofir ogal@cix.compulink.co.uk