On Thursday, March 2, 2017 at 4:16:47 AM UTC+8, Philip McGrath wrote:
> 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:
>
>
> #lang racket/gui
> (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.
>
>
> Thanks,
> Philip
Does this do what you want?
#lang racket/gui
(define frame
(new frame% [label "Example"] [height 300]))
(for ([letter '("A" "B" "C" "D")])
(define grp
(new group-box-panel%
[parent frame]
[min-height 100]
[label letter]))
(define panel
(new vertical-panel%
[parent grp]
[style '(vscroll)]
[alignment '(left top)]))
(for ([i (in-range 0 10)])
(new button%
[parent panel]
[label (number->string i)])))
(send frame show #t)
Best Regards,
Alex.
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