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Re: CALayer vs Layer Backed Views

Subject: Re: CALayer vs Layer Backed Views
From: email@hidden
Date: Fri, 2 Nov 2007 14:15:05 +0900
Delivered-to: email@hidden
Delivered-to: email@hidden

Thats interesting, because I have got it to work.

I threw something together real quick... Basically, I have a layer backed container view, a pre-existing view in the nib, and an action on the controller that inserts the view into the container that is layer backed. Just to be sure, it explicitly set the layer of the inserted view to a layer (new or pre-existing), and it works. I have my layer hierarchy maintained by an (don't yell at me please) NSArrayControler, so I can confirm that when I set the selected layer, and attach that selected layer to a view, it all works.... Z-position, Z-rotation, everything........ except scaling and resizing and positioning (e.g resizing the layer will not resize the view and positioning the layer in X/Y will not re-position the view) That being said, scaling and rotating the sublayer transform of the super layer (container) will scale and rotate the etc the view...... so a workaround may be, for every view:

Have it layer backed, insert the view as a subview of another view that is layer backed. Apply scaling, z-ordering, rotation on the **superview's** sublayer transform. IOW, use a container view for every view that you insert and operate on its sublayerTransform........

Ahh, I think I got it. Instead of the above, try to operate on just the sublayer transform of the layer backed view first..... see what happens.

Andre

On 平成 19/11/02, at 6:07, Bertrand Landry-Hetu wrote:

I have set a perspective transform, when I did not the zPosition did
not have any effect.
Just to be clearer, I see the transform applied correctly, I just
don't get the animation of that property of the layer.
I've had some answer off list that we should expect more details soon
of what we can and can't do with the layer of a view.
2007/11/1, Andre <email@hidden>:
Have you set a perspective transform on the CA3DTransform3D value of
the enclosing layer? (The layer that encloses all your sublayers)
If you don't set a perspective transform, then z-position changes
won't animate.....
Also, what are the values you are setting for the Z-position?
Sometimes setting the z-position to some outrageous number causes
trouble..... (I haven't tested with 9A581)
I've noticed some oddities with CALayer backed NSViews.... basically 3- d rotation and stuff is a bit wonky.... at least in the betas it was.... hit detection doesn't work in 3-d for example.... Moving in 2-d space though should be fine...
Andre
On 平成 19/11/01, at 18:56, Bertrand Landry-Hetu wrote:
Hi list,
I'm playing around with layers and there are some subtleties I don't
quite get when using layer backed views. I did some animations using
"pure" CALayers as a proof of concept for a view. Along the way I
figured I'd like to have subviews (NSViews) embedded in it and so I
went back to do everything using NSViews that have setWantsLayer set
to yes.
I noticed that if I change the zPosition of the view's layer it does not animate while it used to when using CALayers only. The position changes correctly, I'm only missing the animation. Changing the view's frame using the animator works fine. I'm wondering, is it safe to change attributes of the layer when the view is in layer backed mode? If it is not safe, is there a way to change transform of the view ?
Thanks.
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- Re: CALayer vs Layer Backed Views
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References:
	>CALayer vs Layer Backed Views (From: "Bertrand Landry-Hetu" <email@hidden>)
	>Re: CALayer vs Layer Backed Views (From: "Bertrand Landry-Hetu" <email@hidden>)

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