Re: Overlapping sibling views
Re: Overlapping sibling views
- Subject: Re: Overlapping sibling views
- From: Robert Vojta <email@hidden>
- Date: Tue, 30 Apr 2013 10:38:53 +0200
> I've never seen any evidence that sibling *NSView*s draw in the wrong order since 10.5. I believe that 'drawRect:' is correctly called in the back-to-front order of the sibling arrangement in the parent view.
>
> However, I *have* seen firsthand, in the last few weeks, that the layers of siblings under a layer-backed parent view were composited in a random order. In my case, I had two sibling views, and I observed the bottom one displaying "on top" unpredictably, about 50% of the time.
Sorry for stepping in, but I have seen this behavior as well in the last week … I had this in the tree ...
- NSView
- NSView (layer backed for AVPlayer)
- NSButton
… and NSButton was invisible - to be more precise, this button wasn't drawn in correct order, but it did work = I was able to click on it. This invisibility was random. To fix correct drawing order, I had to set wantsLayer = YES on the root NSView as well. And then it was fixed and no more random invisibility.
R.
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