Re: CALayer-hosting view and child NSView's
Re: CALayer-hosting view and child NSView's
- Subject: Re: CALayer-hosting view and child NSView's
- From: Scott Anguish <email@hidden>
- Date: Thu, 1 Jul 2010 03:42:14 -0400
On Jul 1, 2010, at 3:14 AM, Oleg Krupnov wrote:
> Right, I want to add subviews into a layer-hosting view.
>
You can’t.
> I want to do this, in particular, because I want the "cells" in my
> custom view to drop shadows. If I implement cells like simple subviews
> and use layer-backed view, I can't seem to do it, can I?
Why can’t your cell drawing class (assuming they’re custom classes) just draw the shadow?
And shadows for buttons aren’t exactly a common user experience.
>
> I have performed an experiment right now and it seems that it's okay
> to add subviews to a layer-hosting view. It seems to work fine. Is
> there any explicit prohibition to do so in the docs?
Yes. Animation Overview. It could be stronger, and I’ll repeat it elsewhere.
Regardless, don’t do it.
>
> Thanks.
>
> On Thu, Jul 1, 2010 at 10:07 AM, Scott Anguish <email@hidden> wrote:
>> A layer-hosting view can’t have subviews, which is what it sounds like you want to do in the second to last paragraph.
>>
>>
>> Why can’t you just use layer-backed views? You get the controls, you can still do animation using the animation proxy and the other animation methods.
>>
>> On Jun 30, 2010, at 5:27 AM, Oleg Krupnov wrote:
>>
>>> Hi,
>>>
>>> I'd like to create a custom view based on Core Animation, namely, a
>>> layer-hosting view. In other words, I'd like to directly manipulate
>>> layers in my code rather than using children NSView's.
>>>
>>> The custom view is like a matrix consisting of cells. Each cell is
>>> represented with a separate CALayer.
>>>
>>> However, certain cells should contain standard buttons like if they
>>> were "child views" of those cell layers. In other words, when I move
>>> the cell layer, the button needs to move synchronously; when I hide
>>> the cell layer, the button needs to hide as well.
>>>
>>> I would like to use the standard NSButton control, to avoid
>>> reinventing the wheel.
>>>
>>> But if I just place the button as a first-level child view of the
>>> custom view, it will not be associated with its parent cell layer. I
>>> also cannot access and manipulate NSButton's root layer to add it as a
>>> sublayer to the cell layer, AFAIK.
>>>
>>> So what is the best way around?
>>>
>>
>>
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