From: Robby Findler <robby@eecs.northwestern.edu>
Date: June 16, 2009 5:16:50 PM EDT
To: Matthias Felleisen <matthias@ccs.neu.edu>
Subject: Fwd: Universe key handler request

I was cleaning out my inbox and found this. Probably too late, but I
thought I'd still pass it on in case you'd forgotten. 

Robby

Forwarded conversation
Subject: Universe key handler request
------------------------

From: Robby Findler <robby@eecs.northwestern.edu>
Date: Tue, Feb 24, 2009 at 9:22 AM
To: matthias@ccs.neu.edu


Can you make the key handlers in universe take 3 arguments instead of
2? That is, it takes a world, a key-event and a boolean where the key
event does not include 'release and the Boolean indicates if the key
was pressed down or not.

Robby

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From: Matthias Felleisen <matthias@ccs.neu.edu>
Date: Tue, Feb 24, 2009 at 9:24 AM
To: Robby Findler <robby@eecs.northwestern.edu>



I guess. Why is this useful?


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From: Matthias Felleisen <matthias@ccs.neu.edu>
Date: Tue, Feb 24, 2009 at 9:25 AM
To: Robby Findler <robby@eecs.northwestern.edu>



P.S. and how would you signal the release of a key?


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From: Robby Findler <robby@eecs.northwestern.edu>
Date: Tue, Feb 24, 2009 at 9:29 AM
To: Matthias Felleisen <matthias@ccs.neu.edu>


the Boolean!

It is useful for multiple key presses that overlap but it is also
useful that it matches what you think when you look at a keyboard.

Robby


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From: Matthias Felleisen <matthias@ccs.neu.edu>
Date: Tue, Feb 24, 2009 at 10:19 AM
To: Robby Findler <robby@eecs.northwestern.edu>




Wait. Say I press a key

Ê*------------------------------||-------------------------------------*
Êkey-press Ê Êholding it down Êthe event handler is called with #t Ê more key presses, no release?

when does the program find out that I have released the key?