Hi Quincey, > For the latter, it seems hardly surprising that the content wouldn't appear > until you stop scrolling, since by setting the copy-on-scroll flag you've > promised that the old view contents don't change during scrolling.
The docs don't say one way or another, but on both 10.7 and 10.8, setNeedsDisplayInRect: is respected during scrolling when copy-on-scroll is enabled -- that is, invalidated regions are redrawn even if the regions were part of the copied region. I'm afraid I sent my question before doing my due diligence though, so in the interest of the archives: the reason the invalidated regions weren't being redrawn during scrolling was because the block that calls -setNeedsDisplayInRect: was scheduled to execute on the main thread via dispatch_async(). Due to a change in either NSScrollView, NSClipView, or CFRunLoop in 10.8, these blocks are only executed after scrolling has stopped. Instead of dispatch_async(), one can use CFRunLoopPerformBlock() along with CFRunLoopWakeUp() to have the block executed on the main thread during scrolling. Thanks for your suggestions Quincey, David _______________________________________________ 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
