If you’re not involving a higher level class like NSTextView or a medium level one like CoreText, it sounds like you might be going all the way down to CoreGraphics? If so, you might find your disparity between your system and your users in things like retina choice for a particular display and changes with respect to layers, especially things like the copiesOnScroll. If these don’t lead you to a solution where you say, “Oh, I really should’ve done this rather than that,” (20/20 hindsight) then write up a feedback report and add its URL here. -- Gary L. Wade http://www.garywade.com/
> On Dec 16, 2019, at 1:03 AM, Redler Eyal via Cocoa-dev > <cocoa-dev@lists.apple.com> wrote: > > Thanks! > I don't use CoreText or NSTextView. I pretty much ruled out RTL vs LTR issues > since this is showing up in documents containing either and both. I'm also > unable to imagine how some text drawing code could produce such artifacts as > splitting a subview in the middle. > (http://eyalredler.com/stuff/catalina_glitch.png) > > Eyal > > > > >> On 14 Dec 2019, at 21:20, Gary L. Wade <garyw...@desisoftsystems.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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
