[racket] Plot: plot-new-window never happens?

On 04/18/2012 06:27 AM, Deren Dohoda wrote:
> It was convenient to have something that bypassed the whole gui issue.
> Since it really is a gui issue, I am not too offended that my own
> laziness got in my way.

I just pushed a fix that turns your so-called laziness into correct 
behavior. :) The original loop will work as you intended it.

Neil ⊥

>      >> > At Tue, 17 Apr 2012 10:40:55 -0400, Deren Dohoda wrote:
>      >> >> I was messing around with a spline utility last night and was
>     using
>      >> >> the plot-new-window? setting to get a plot. The goal was to
>     share an
>      >> >> exe with a coworker who doesn't have Racket. Just a
>     command-line app
>      >> >> but to get the plot to display I needed a window and this seemed
>      >> >> awesome. The problem is I couldn't get the plot to display
>     when the
>      >> >> thread was in a procedure. The window would appear but it was
>     like the
>      >> >> plot backend wasn't free to draw to it. Here's a way to
>     reproduce it
>      >> >> on v5.2:
>      >> >>
>      >> >> #lang at-exp racket
>      >> >> (require plot)
>      >> >> (plot-new-window? #t)
>      >> >> (let loop ()
>      >> >>    (let ((dummy (read)))
>      >> >>      (if (and (number? dummy) (zero? dummy))
>      >> >>          (void)
>      >> >>          (begin
>      >> >>            (plot (function (λ(x) (* x x)) -2 2))
>      >> >>            (loop)))))
>      >> >>
>      >> >> So long as you are looping, new windows will appear without plot
>      >> >> contents. When you finally quit (here by entering the number
>     zero) all
>      >> >> the plots are drawn in those windows. Any help? Did I do
>     something
>      >> >> horribly dumb?
>      >> >>
>      >> >> Thanks,
>      >> >> Deren