On Apr 19, 2011, at 20:57, Todd Heberlein wrote:
> Both work, but for some reason the circle images using the transformer don't
> quite look right, like they are duller or something. Maybe a reduced opacity.
> But I am returning a pointer to the same image. Weird.
>
> Any idea why a column with a transformer has duller images?
If it's significantly duller, that probably means it's being shown as disabled.
> On a different (but maybe related) note, in MyController +initialize is
> getting called twice even though I have one instance of MyController. This is
> where I register my transformer.
>
> Any idea why +initialize is being called twice?
It's called once per class. If MyController is a subclass, it's called once for
the subclass and once for the superclass, but if one of the classes doesn't
implement it, the other gets called twice. The +initialize method must be coded
to expect this. See:
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSObject_Class/Reference/Reference.html
IAC, registering transformers isn't normally necessary any more, provided the
transformer name is the same as its class name:
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSValueTransformer_Class/Reference/Reference.html
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