Re: Layer hosting custom NSView and setAlphaValue
Re: Layer hosting custom NSView and setAlphaValue
- Subject: Re: Layer hosting custom NSView and setAlphaValue
- From: Corbin Dunn <email@hidden>
- Date: Mon, 14 May 2012 13:27:24 -0700
On May 14, 2012, at 1:14 PM, Markus Spoettl <email@hidden> wrote:
> On 5/14/12 8:23 PM, Kyle Sluder wrote:
>> On May 14, 2012, at 11:22 AM, Corbin Dunn wrote:
>>
>>> 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.
>>
>> I assumed that Markus was already doing this, since -setAlphaValue: is
>> documented to throw an exception if your view isn't already layer-backed.
>
> I wasn't, and I was puzzled by this as well. I assumed the comment about the exception was a documentation left-over from earlier SDK releases. It definitely doesn't throw an exception when used on non-layer backed views.
Yeah, one can change the alpha value when not using layers. I guess this slipped through the cracks, as it has worked for a while. We draw the view (and children) into an image and then composite that for the real drawing.
Definitely log a documentation bug asking to clarify this.
corbin
>
> Regards
> Markus
> --
> __________________________________________
> Markus Spoettl
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