[racket] printer-dc% and end-doc

Thank you, it's working :-)

Am Dienstag, 20. November 2012 schrieb Matthew Flatt:
> I've pushed a repair for this bug to the git repo. Meanwhile, a
> workaround is to wrap the `end-doc' call as
>
>  (with-handlers ([exn:fail:contract? void])
>    (send dc end-doc))
>
> At Tue, 20 Nov 2012 09:20:06 +0100, "Nikolaus Klepp" wrote:
> > Thanks to Matthew I have a printer dialog :-)
> >
> > I can actually print a page, but  (send dc end-doc) throws an error.
> >
> > Example:
> >
> > (define pss (get-page-setup-from-user "Drucke das Wunderwerk"))
> >   (when pss
> >     (current-ps-setup pss)
> >     (define dc (new printer-dc%))
> >     (send dc start-doc "")
> >     (send dc start-page)
> >     (send dc set-scale 3 3)
> >     (send dc set-text-foreground "blue")
> >     (send dc draw-text "Don't Panic!" 0 0)
> >     (send dc end-page)
> >     (send dc end-doc))
> >
> >  meth: broke its contract
> >  promised: void?
> >  produced: #<semaphore>
> >  in: the range of
> >       (->m void?)
> >  contract from: (class printer-dc%)
> >  blaming: (class printer-dc%)
> >
> > Well, the page is printed, but I would like to get rid of that error. Any
> > way to do that?
> >
> > Nik
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