[plt-scheme] Using FrTime

Oh you are right, I copied the line wrong. I changed it to this

(define frame (new ft-frame% (label "Timer") (width 200) (height 80)
(shown #t)))

And it works. Thanks.

Gregory Cooper wrote:
> It should be "label", not "label%", as for ordinary MrEd widgets (if
> the paper says "label%", it's a typo).  And it needs to be "shown"
> instead of "visible".  (Sorry for the discrepancy.)
>
> On 10/1/06, Jon Rafkind <workmin at ccs.neu.edu> wrote:
>> If I require class.ss and fred.ss I get this error
>>
>> instantiate: unused initialization arguments: (label% "Timer") (visible
>> #t) for instantiated class: .../aux-mixin-macros.ss:19:16
>>
>> Where my only line of code( other than the require's ) is
>>
>> (define frame (new ft-frame% (label% "Timer") (width 200) (height 80)
>> (visible #t)))
>>
>> Gregory Cooper wrote:
>> > Hi Jon,
>> >
>> > As you've noticed, class.ss and fred.ss have to be explicitly required
>> > before you can use the widget set.  However, once you've done so, they
>> > should all work.  What errors do you get?  Do they happen on
>> > "require", or when attempting to evaluate something?
>> >
>> > Greg
>> >
>> > On 10/1/06, Jon Rafkind <workmin at ccs.neu.edu> wrote:
>> >> Im reading "Crossing State Lines: Adapting Object-Oriented
>> Frameworks to
>> >> Functional Reactive Languages" by Ignatoff, Cooper, and Krishnamurthi
>> >> and would like to try out the first example but can't get it
>> working in
>> >> drscheme 352. I chose the FrTime language and typed this line into
>> the
>> >> definitions windows:
>> >>
>> >>    (define frame (new ft-frame% (label% "Timer") (width 200)
>> (height 80)
>> >> (visible #t)))
>> >>
>> >> Verbatim from the paper( except the paper used 'true' instead of
>> #t ).
>> >> This led to the error:
>> >>    reference to undefined identifier: new
>> >>
>> >> So I did
>> >>    (require (lib "class.ss"))
>> >> But then got a different error:
>> >>
>> >>    reference to undefined identifier: ft-frame%
>> >>
>> >> Grepping through collects/frtime I found ft-frame% defined in
>> >> frtime/demos/gui/fred.ss.
>> >>
>> >>   ~/tmp/src/drscheme-352/collects/frtime $ grep -r "ft-frame" *
>> >>   demos/gui/demo/bindec.ss:(current-widget-parent (new ft-frame%
>> (label
>> >> "Binary<-->Decimal")))
>> >>   demos/gui/demo/timer.ss:(current-widget-parent (new ft-frame%
>> (width
>> >> 400) (stretchable-width #t)))
>> >>   demos/gui/fred.ss:  (define ft-frame%
>> >>   demos/gui/simple.ss:          (set! fr (new ft-frame%)))
>> >>
>> >> If I require 'fred.ss' I get a bunch more errors which probably
>> aren't
>> >> worth going into. Am I missing something?
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>>
>
>