Get-size should work, can you provide a example that illustrates the
problem?
The only tricky bit is that the actual size of a widget is only computed
after it is shown. Here is an example:
#lang racket
(require racket/gui)
(define toplevel (new frame% [label "hello"] [width 200] [height 200]))
(define p (new panel% [parent toplevel] [min-width 100] [min-height
100]))
(define-values (w h) (send p get-size))
(printf "Before show: w = ~a, h = ~a~%" w h)
(send toplevel show #t)
(define-values (w1 h1) (send p get-size))
(printf "After show: w = ~a, h = ~a~%" w1 h1)
This prints out:
Before show: w = 0, h = 0
After show: w = 184, h = 161
You can also override the "on-size" method on the panel% class to be
notified of size changes as they happen.
Best Regards,
Alex.
On Thursday, February 22, 2018 at 12:01:39 PM UTC+8, David Alkire wrote:
>
> Is it possible to get the current size (width and height) of a panel% from
> racket/guilty? I haven't been able to figure out a way. I set a min-width
> and min-height in my panel and allow them to be stretchable. If they do
> stretch, I want to be able to know their current size. Sending get-size or
> get-width to the panel gives me 1 instead of my min-width of 200, for
> example. I get 200 if I send min-width, but I want to be sure I can react
> to changes in size appropriately.
>
> Any help is appreciated.
>
> Thanks,
> David
>
>
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