On May 14, 2012, at 10:49 AM, Kyle Sluder <[email protected]> wrote: > On May 14, 2012, at 9:52 AM, Markus Spoettl wrote: > >> On 5/14/12 6:10 PM, Corbin Dunn wrote: >>>> I have a layer hosting custom view which I can't convince to listen to the >>>> alpha value I set on its superview. Other views sitting on the same >>>> superview correctly fade with the alpha value of the superview changing. My >>>> view doesn't. It simply hides when the superview's alpha is less than 1. >>>> >>>> Not sure what the problem is, the documentation for setAlphaValue doesn't >>>> tell me a lot, neither does the view programming guide. >>>> >>>> Any ideas? >>> >>> Hi Markus, It sounds like the parent view which you are setting the >>> alphaValue on is not layer backed, but you do apparently have a layer backed >>> child. That won't work; make the parent layer backed. >> >> Hi Corbin, thanks and sorry for not being clearer, this is my hierarchy: >> >> container (NSView) >> | >> - button 1 (NSButton) >> - button 2 (NSButton) >> - Custom View (NSView subclass, layer-hosting). >> >> I'm setting the container's alpha value, which fades both buttons, but not >> my layer hosting custom view. >> >> My only guess is that there's something I need to do in my custom view but I >> have no idea what that is. > > I think you need to manually animate the alpha value of your layer-hosting > view's layer. > > When you're layer-hosting, AppKit doesn't muck with your layers. As long as > you perform the fade of your layer-hosting view's layer within the same > animation context as the animation of your superview's alpha, you should be > good to go. > > I don't know whether I'd consider your scenario a bug.
No, it is not a bug -- unfortunately, we can't make certain things go cross boundaries from non-layer backed to layer backed. This has an easy solution: layer back the container. corbin > > --Kyle Sluder _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
