> On Dec 15, 2018, at 8:07 AM, Tor Arne Vestbø <tor.arne.ves...@qt.io> wrote: > > Piggy-backing on this thread, what does lockFocusIfCanDraw actually do in > layer-backed mode?
I have a layer-hosting view running under macOS 10.12.6 and lockFocus is called by the system frameworks. #0 0x00000001000748f4 in -[MyView lockFocus] #1 0x00007fffc0544e7b in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #2 0x00007fffc05456d1 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #3 0x00007fffc05456d1 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #4 0x00007fffc05456d1 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #5 0x00007fffc05442af in -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #6 0x00007fffc05426d8 in -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] #7 0x00007fffc053dfca in -[NSView displayIfNeeded] #8 0x00007fffc053d8db in -[NSWindow displayIfNeeded] WWDC 2018 Session 209 states the following. "With our changes to layer backing, there's a few patterns I want to call out that aren't going to work in macOS 10.14 anymore. If you're using NSView lockFocus and unlockFocus, or trying to access the window's graphics contents directly, there's a better way of doing that. You should just subclass NSView and implement draw rect. Both of those methods have been kind of finicky for a while. So, you'll be saving yourself some trouble." Note that all of the NSView focus methods are now depreciated. --Richard Charles _______________________________________________ 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
