> turning it on did not cause the issue to show up on Mohave >> ... >> I, for one, wasn't able to reproduce it on the 5 machines I was able to put >> my hands on. > Curious, how were you able to verify that turning on copyOnScroll in > your app and running it on Mojave did not reproduce the problem if you > couldn’t reproduce the problem on Catalina on the machines you had access to? > Just curious.
I created a special build of the app with copyOnScroll turned back on and then tested it on my machine running Mohave (works just as well) and Catalina (again - no issues). I then sent it to a group of my clients who were experiencing the issue on Catalina, they reported back to me that the issue is still there. I also did a similar test with turning responsive scrolling off, same results. I also tried a build where you can turn off drawing the document view background and/or drawing of the pages themselves and the issue was still there. Eyal > —Rob > > >> On Dec 31, 2019, at 1:34 AM, Eyal Redler <e...@beamr.com> wrote: >> >>> >>> On 30 Dec 2019, at 2:09, Rob Petrovec via Cocoa-dev >>> <cocoa-dev@lists.apple.com <mailto:cocoa-dev@lists.apple.com>> wrote: >>> >>> I honestly think this is fall out from copiesOnScroll being deprecated and >>> the clip view always behaving as if it was set to true. My guess is you >>> will see the same problems in your apps if you ran them on Mojave with >>> copiesOnScroll set to true. In which case you need to update your app to >>> work with copiesOnScroll set to true. E.g. use layers instead of drawRect. >> >> I agree that this is probably connected to the changes that led to >> copiesOnScroll to be deprecated but turning it on did not cause the issue to >> show up on Mohave nor did it fix the issue on Catalina. AFAIK drawRect is >> not deprecated (yet?) and so my drawing the views, on a mac, using drawRect >> is compatible Apple's current guidelines. Nothing old fashioned or >> unorthodox in what I'm doing. >> >> My understanding (and hopefully those in the know will correct me if I'm >> wrong), with responsive scrolling, copiesOnScroll is not relevant, drawRect >> is not called to paint the newly exposed area as you scroll but rather is >> called ahead of time for the visible area plus some extra content above and >> below. When the user scrolls, the system just copies the bits to the screen >> from some offscreen buffer. I believe that since responsive scrolling was >> introduced, copiesOnScroll was ignored anyway and was relevant only when >> responsive scrolling was turned off. >> >> Last thing to point out, the problem is exclusive to Catalina but it doesn't >> effect all users, I don't have any statistics but gathering from the >> relatively few reports I've received, it seems to effect only a minority of >> users (thank God, this bug really makes me look really bad and I'm >> completely helpless against it). I, for one, wasn't able to reproduce it on >> the 5 machines I was able to put my hands on. >> >> Eyal >> >> >> >>> >>> —Rob >>> >>> >>>> On Dec 29, 2019, at 4:08 PM, Jerome Krinock via Cocoa-dev >>>> <cocoa-dev@lists.apple.com> wrote: >>>> >>>> Since installing macOS 10.15, I see blocks of empty text view lines or >>>> table view rows often when scrolling through many apps, including file >>>> browser windows in Path Finder (cocoatech.com) and, for heaven’s sake, >>>> even in BBEdit. >>>> >>>> Conclusion: This is not “our” faults. Thank you, Eyal for submitting this >>>> issue to Apple as FB7509033. Maybe someday… [rant omitted]. >>>> _______________________________________________ >>>> >>>> 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/petrock%40mac.com >>>> >>>> This email sent to petr...@mac.com >>> >>> _______________________________________________ >>> >>> 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/eyal%40mellel.com >>> <https://lists.apple.com/mailman/options/cocoa-dev/eyal%40mellel.com> >>> >>> This email sent to e...@mellel.com <mailto:e...@mellel.com> > _______________________________________________ > > 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/eyal%40mellel.com > > This email sent to e...@mellel.com _______________________________________________ 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
