Noah, yes, thanks, I think that is it. I spoke too soon in my that-works-perfectly announcement, but this must be the right track to follow. It's not clear to me when needsDisplay is being cleared in the view; I need to look into this a little more. So far, needsDisplay is sticking on, or appears to be.
Jeff On Feb 4, 2016, at 4:19 PM, Noah Desch wrote: The `needsDisplay` property will tell you if there are any pending draw requests since the last time the view was drawn, is that what you are looking for? -Noah > On Feb 4, 2016, at 6:07 PM, Jeff Evans <jev...@ars-nova.com> wrote: > > Suppose one wants to do a task in an NSView only once it has no drawRect > calls pending. Is there any way to tell, for a particular NSView, if there > are any drawing events coming up? Whether, that is, the view is up to date? > > I've tried counting my explicit uses of setNeedsDisplay and decrementing that > count at drawRect, but the trouble is that one can call setNeedsDisplay many > times and that will not translate into the same number of drawRects. > > One idea was to call getRectsBeingDrawn at drawRect and hope that the number > of rects is equal to the number of update requests combined into that call. > But the number of rects does not appear to equal the number of draw requests. > > But there must be some place that contains a queue of upcoming draw requests. > If so, is there access to it? > > I'm hoping this is a dumb question. > > Thanks, Jeff > > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/deschnl%40me.com > > This email sent to desc...@me.com -- If this email is spam, report it to https://support.onlymyemail.com/view/report_spam/MTAxOTYyOjE4NDk5MTIzNDg6amV2YW5zQGFycy1ub3ZhLmNvbTpkZWxpdmVyZWQ _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
