This seems like it should be a simple question, but I can't figure out how
to get a scroll bar in a gui application like this one:
> (define frame
> (new frame% [label "Example"]))
> (for ([letter '("A" "B" "C" "D")])
> (define grp
> (new group-box-panel%
> [parent frame]
> [label letter]))
> (for ([i (in-range 0 10)])
> (new button%
> [parent grp]
> [label (number->string i)])))
> (send frame show #t)
I can see something like what I have in mind in Dr. Racket's
"Colors">"Color Schemes" preferences tab (at least on Mac OS), but I can't
figure out how to do it.
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