<html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> I'm sorry, I should have been more specific – it happens when using a gl-enabled canvas (example below).<br> I hope that does not turn it into a dragons' den? ;)<br> <br> Philipp<br> <br> #lang racket/gui<br> <br> (require sgl)<br> <br> (define c%<br> (class canvas%<br> (inherit with-gl-context swap-gl-buffers)<br> (define/override (on-paint)<br> (with-gl-context<br> (lambda ()<br> (gl-clear-color (random) (random) (random) 1)<br> (gl-clear 'color-buffer-bit)<br> (swap-gl-buffers)<br> (gl-flush))))<br> (super-new (style '(gl no-autoclear)))))<br> <br> (define f (new frame% [label ""] [width 100] [height 100]))<br> (define c (new c% [parent f]))<br> (send f show #t)<br> <div class="moz-cite-prefix"><br> <br> On 11.02.13 22:39, Robby Findler wrote:<br> </div> <blockquote cite="mid:CAL3TdOOT+61nn+XOb+xqto=K+cZ32-otqafJM5Se2ngNOK3bew@mail.gmail.com" type="cite"> <div dir="ltr">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). <div><br> </div> <div style="">Robby</div> <div style=""><br> </div> <div style=""> <div>#lang racket/gui</div> <div><br> </div> <div>(define c%</div> <div> (class canvas%</div> <div> (inherit get-client-size get-dc)</div> <div> (define/override (on-paint)</div> <div> (define-values (w h) (get-client-size))</div> <div> (define dc (get-dc))</div> <div> (define c (make-object color% (random 255) (random 255) (random 255)))</div> <div> (send dc set-brush c 'solid)</div> <div> (send dc set-pen "black" 1 'transparent)</div> <div> (send dc draw-ellipse 0 0 w h))</div> <div> (super-new)))</div> <div><br> </div> <div>(define f (new frame% [label ""] [width 100] [height 100]))</div> <div>(define c (new c% [parent f]))</div> <div>(send f show #t)</div> </div> </div> <div class="gmail_extra"><br> <br> <div class="gmail_quote">On Mon, Feb 11, 2013 at 9:41 AM, Philipp Dikmann <span dir="ltr"><<a moz-do-not-send="true" href="mailto:philipp@dikmann.de" target="_blank">philipp@dikmann.de</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">It appears that the GUI canvas% refreshes itself whenever it receives a mouse-event%.<br> I intend to refresh the canvas at a steady pace (using a timer%) and independently of any mouse-events instead.<br> Is there a reasonable way to suppress the default behavior?<br> <br> Thanks for your time,<br> Philipp<br> ____________________<br> Racket Users list:<br> <a moz-do-not-send="true" href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a><br> </blockquote> </div> <br> </div> </blockquote> <br> </body> </html>