Re: NSTextField setTextColor: not working as expected

FROM : charlie
DATE : Mon Dec 31 15:23:33 2007

That's a great thought, but actually it's just a plain-old, IB-created
NSTextField.

- Chuck


On December 31, 2007, Ricky Sharp wrote:

>
> On Dec 31, 2007, at 7:55 AM, Shripada Hebbar wrote:
>

>>>
>>> this doesn't work:
>>>
>>> [myTextField setTextColor:[[NSColor redColor] 
>>> colorWithAlphaComponent:0.5]];
>>> (result is plain red, ignoring alpha)
>>>

>> Documentation  of 'colorWithAlphaComponent' says:
>> "A subclass with explicit opacity components should override this 
>> method to return a color with the specified alpha."
>> Thus the above code wont return you the expected color.

>
>
> Actually, colorWithAlphaComponent: will indeed return the expected 
> color.  I've use that API on many occasions and just created a test 
> app with two NSTextField instances.  They use alpha of 0.5 and 0.25 
> respectively.  The text was rendered correctly even when the text was 
> being edited (i.e. the field editor also did the right thing).
>
> I ran my test on 10.5.1
>
> I believe the problem may be within the cells/views hierarchy.  If 
> things are marked as being opaque, alpha can be ignored.  Is a custom 
> subclass of NSTextField being used?
>
>
>
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