Yes, I think so. collects/mred/private/mrcanvas.rkt:205 defines
the on-paint method in canvas% as:
(lambda ()
(if (eq? paint-cb default-paint-cb)
(super-on-paint)
(paint-cb this (get-dc))))
where paint-cb is a field that takes paint-callback.
2 hours ago, Justin Zamora wrote:
> Is the dc% that is passed to the paint-callback for a canvas always
> the same dc% returned by (send canvas get-dc)? In other words, are
> the following equivalent?
>
> [paint-callback (lambda (canvas dc) (send dc clear))]
> [paint-callback (lambda (canvas dc) (send (send canvas get-dc) clear))]
>
> Justin
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