Ahh, I thought they were bound together in some sort of a mysterious structure. Thanks.
On Tue, Feb 25, 2014 at 4:53 PM, Jay McCarthy <jay.mccar...@gmail.com>wrote: > When you press a key, say A, and then release it, there are two > key-events that are registered. The first has "get-key-code" as #\A. > The second has "get-key-code" 'release and #\A is returned by > get-release-key-code. > > Jay > > On Tue, Feb 25, 2014 at 5:49 PM, Tom Dean <t...@google.com> wrote: > > If I create an instance of canvas% or editor-canvas% like > > > > (define THE-CANVAS (new (class editor-canvas% > > (super-new) > > ;; Key handler for key-stroke input: > > (define/override (on-char key-event) > > (let ([event (send key-event > > get-key-code)]) > > (printf "EQ? ~s~n" (eq? event > #\[))))))) > > > > and then hit the [ key it's as though the event is a pair consisting of > a > > char #\[ and the symbol 'release: > > > > EQ? #t > > EQ? #f > > > > bur event isn't a pair?, list? or any other type as far as I can tell. > And > > it doesn't appear that get-key-code is returning multiple values, at > least > > in the sense of being something I can capture with let-values or > set-values. > > Any clues how I might capture just the key code and not the release > symbol? > > > > > > ____________________ > > Racket Users list: > > http://lists.racket-lang.org/users > > > > > > -- > Jay McCarthy <j...@cs.byu.edu> > Assistant Professor / Brigham Young University > http://faculty.cs.byu.edu/~jay > > "The glory of God is Intelligence" - D&C 93 >
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