I was using os x 10.7.5 (and saw the same flashing).
On Tue, Feb 12, 2013 at 12:59 PM, Philipp Dikmann <phil...@dikmann.de>wrote: > The OS here is Mac OS 10.6.8, running Racket 5.3.1 - > so I guess its an issue with the OpenGL implementation. > Thanks for taking a look, though :) > > > > On 12.02.13 19:37, Michael Wilber wrote: > >> Your OpenGL example still doesn't flash for me when I move the mouse >> over it, on 64-bit linux. >> >> It does, however, flash when I change window focus... for some reason? >> >> What OS are you using? >> >> Philipp Dikmann <phil...@dikmann.de> writes: >> >>> I'm sorry, I should have been more specific – it happens when using a >>> gl-enabled canvas (example below). >>> I hope that does not turn it into a dragons' den? ;) >>> >>> Philipp >>> >>> #lang racket/gui >>> >>> (require sgl) >>> >>> (define c% >>> (class canvas% >>> (inherit with-gl-context swap-gl-buffers) >>> (define/override (on-paint) >>> (with-gl-context >>> (lambda () >>> (gl-clear-color (random) (random) (random) 1) >>> (gl-clear 'color-buffer-bit) >>> (swap-gl-buffers) >>> (gl-flush)))) >>> (super-new (style '(gl no-autoclear))))) >>> >>> (define f (new frame% [label ""] [width 100] [height 100])) >>> (define c (new c% [parent f])) >>> (send f show #t) >>> >>> >>> On 11.02.13 22:39, Robby Findler wrote: >>> >>>> 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 >>>> <mailto: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 >>>> ____________________ >>>> Racket Users list: >>>> >>>> http://lists.racket-lang.org/**users<http://lists.racket-lang.org/users> >>>> >>>> >>>> ____________________ >>> Racket Users list: >>> http://lists.racket-lang.org/**users<http://lists.racket-lang.org/users> >>> >> >
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