Re: Drawing issue with translucent borderless NSWindow, initial content half stays
Re: Drawing issue with translucent borderless NSWindow, initial content half stays
- Subject: Re: Drawing issue with translucent borderless NSWindow, initial content half stays
- From: Ken Thomases <email@hidden>
- Date: Tue, 30 Aug 2016 21:03:20 -0500
On Aug 30, 2016, at 10:10 AM, Sean McBride <email@hidden> wrote:
>
> I have a drawing bug in my app, and reduced it to a toy app. Basically, I create an NSBorderlessWindowMask type window who's content view draws a translucent rounded rect. Its only subview is an NSTextField that draws a number in a big font. When I display the window, all is well. But when I change the textfield text, or even simply remove the textfield, its old string half remains in a ghostly outline. This works in 10.9 and 10.10, but is buggy in 10.11 and 10.12. I figure it's an OS bug, but maybe the description rings any bells for anyone?
Does the window have a shadow? Are you invalidating the shadow whenever the content gets redrawn (since the shadow of a partially-transparent window depend on exactly what was drawn non-transparently)?
Regards,
Ken
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