On Dec 2, 2012, at 6:23 PM, Gordon Apple <g...@ed4u.com> wrote:
> I tried setting only that in IB. I also tried setting everything in that
> view nib. OriginalLayer is non-nil in the trace, but, as you see, gets
> replaced with the one with color background.
Well, it's probably not a good idea to turn on layer-backing for a view in nib
and then try to transform it into a layer-hosting view by assigning to its
layer property and then calling -setWantsLayer:YES. There's a chance that
NSView will say, "oh, my wantsLayer property is already yes; I'll just keep on
doing my thing" even though your intent was to remove AppKit's ownership of
your layer.
To be honest, the difference between layer-backed and layer-hosting views is
still murky, though the situation has gotten slightly better with the 10.8
AppKit release notes. I just want one document that explicitly describes
*precisely* what AppKit does and does not control in each case. :-/
I did just remember something, though: NSCollectionView copies its collection
items around in some sort of crazy way that was subtly changed with the
introduction of NSViewController. Is it possible that the views in your
collection view are *NOT* the same instances that were unarchived from nib, but
rather *copies* of those views created by sending -encodeWithCoder: to the
collection item's view?
--Kyle Sluder
>
>
> On 12/2/12 5:48 PM, "Kyle Sluder" <k...@ksluder.com> wrote:
>
> On Sun, Dec 2, 2012, at 03:07 PM, Gordon Apple wrote:
> > I have a simple subview in my NSCollectionView prototype. (Collection
> > view
> > is in a popover. Popover launched from a floating control panel.) It
> > contains the following:
> >
> > - (void) awakeFromNib {
> > CALayer *originalLayer = self.layer;
> > CALayer *newLayer = [CALayer layer];
> > newLayer.backgroundColor = [[NSColor magentaColor] CGColor];
> > self.layer = newLayer;
> > self.wantsLayer = YES;
> > // [self getThePlayer];
> > // [self addPlayerLayer];
> > }
> >
> > Code gets executed, but no visible color. originalLayer is nil.
> > Commented
> > code is for testing. If I can’t simply get a color layer to work,
> > there’s
> > no chance of that working. I’ve tried adding a sublayer with color
> > background — no go. Controls in collection view work just fine.
> >
> > I’m reasonably well versed in CALayers and have used them extensively.
> > Is
> > there any reason why this doesn’t work?
>
> Did you enable layer-backing on the enclosing scroll view?
>
> --Kyle Sluder
>
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