I don't think it does that. The program below, at least for me, doesn't do
crazy colors when I move the mouse around (it does when resizing, tho).
Robby
#lang racket/gui
(define c%
(class canvas%
(inherit get-client-size get-dc)
(define/override (on-paint)
(define-values (w h) (get-client-size))
(define dc (get-dc))
(define c (make-object color% (random 255) (random 255) (random 255)))
(send dc set-brush c 'solid)
(send dc set-pen "black" 1 'transparent)
(send dc draw-ellipse 0 0 w h))
(super-new)))
(define f (new frame% [label ""] [width 100] [height 100]))
(define c (new c% [parent f]))
(send f show #t)
On Mon, Feb 11, 2013 at 9:41 AM, Philipp Dikmann <phil...@dikmann.de> wrote:
> It appears that the GUI canvas% refreshes itself whenever it receives a
> mouse-event%.
> I intend to refresh the canvas at a steady pace (using a timer%) and
> independently of any mouse-events instead.
> Is there a reasonable way to suppress the default behavior?
>
> Thanks for your time,
> Philipp
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