[plt-scheme] Using FrTime

To follow up, some details in the interface may have changed since the
writing of the paper.  In particular, I think the constructor for
ft-frame% takes "shown" instead of "visible", and  "min-height" and
"min-width" are probably preferable to "height" and "width".  (Dan, is
this documented somewhere?)

Greg

On 10/1/06, Gregory Cooper <greg at cs.brown.edu> 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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