Thanks Rob, Makes sense although the issue is not consistent on Catalina (I think this is something only a minority of my app users on Catalina are experiencing - and I wasn't able to reproduce it). I saw this deprecation but could not be sure if it means that it is always on or always off. I guess always on makes more sense. I tried turning copiesOnScroll to on and sent a build to my users so we'll see if it is related - I really dislike solving issues I cannot confirm fixed myself.
Eyal > On 14 Dec 2019, at 22:08, Rob Petrovec <petr...@mac.com> wrote: > > From > https://developer.apple.com/documentation/appkit/nsclipview/1532142-copiesonscroll?language=objc > copiesOnScroll > A Boolean value that indicates if the clip view copies rendered images while > scrolling. > Discussion > When the value of this property is YES, the clip view copies its existing > rendered image while scrolling (only drawing exposed portions of its document > view); when it is NO, the view forces its contents to be redrawn each time. > > From NSClipView.h: > @property BOOL copiesOnScroll API_DEPRECATED("NSClipView will always > minimize the area of the document view that is invalidated. To force > invalidation of the document view, use -[NSView setNeedsDisplayInRect:].", > macos(10.0, API_TO_BE_DEPRECATED)); > > The way I read that is that the clip view now always behaves as if > copyOnScroll is YES. So even though you have it set to NO, the scroll/clip > view will behave as if it was true. That may be your problem here and > explain the difference in behavior for you between Mojave and Cataline. Good > luck. > > —Rob > > > >> On Dec 14, 2019, at 12:20 PM, Gary L. Wade via Cocoa-dev >> <cocoa-dev@lists.apple.com> wrote: >> >> I see from your personal web site you know Hebrew. Is it possible the >> affected/non-drawing pages contain some RTL text while those that don’t only >> contain LTR? I have seen some bugs with RTL text within NSTextView where the >> text was/wasn’t drawing in a similar manner. Do you operate at a CoreText >> level? >> -- >> Gary L. Wade >> http://www.garywade.com/ >> >>> On Dec 14, 2019, at 6:17 AM, Redler Eyal via Cocoa-dev >>> <cocoa-dev@lists.apple.com> wrote: >>> >>> Hi All, >>> >>> I'm getting reports from users complaining about a strange display issue on >>> Catalina with my app. >>> My app is a word-processor (not based on the cocoa text system) whose main >>> display shows the pages of the document. Every page is a separate view and >>> all the pages are subviews of one big view which resides inside a scroll >>> view. >>> >>> The problem is that when with some documents, sometimes, when the user >>> scrolls down the document, some pages are not drawn or even partially >>> drawn. When the user clicks the place where the page is supposed to appear, >>> it shows up. >>> Another interesting bit is seems that while the scroll view background is >>> drawn, the document views (the view containing the page views) drawRect is >>> not called or at least not taking effect, I can tell because the pages on >>> this view cast a shadow which is drawn by drawing blank squares on the >>> document view with a transparency layer. >>> Last bit of info, copiesOnScroll set to NO for this view and I see that >>> this property is deprecated on Catalina. >>> >>> So far I'm struggling with this for a couple of weeks, I wasn't able to >>> reproduce this at all on my machine. >>> I'm really desperate for an answer and while I'm not expecting anyone here >>> to provide me with one (wouldn't object, of course :-)) I would love if >>> people reading this might try to speculate to the causes of this or perhaps >>> if you have any direction as to what to test on my users machines in order >>> to be able to reproduce this. >>> >>> Thanks >>> >>> Eyal Redler >>> ------------------------------------------------------------------------------------------------ >>> "If Uri Geller bends spoons with divine powers, then he's doing it the hard >>> way." >>> --James Randi >>> www.eyalredler.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/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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
