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Re: Bindings paradigm
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Re: Bindings paradigm

On Jul 10, 2004, at 1:18 PM, Gwynne wrote:
#2 is pretty simple, but to me it seems to violate the principle of KVC because it doesn't represent any data in the model but rather a state of the view that would have been the controller's responsibility before bindings came along.

It doesn't really violate encapsulation, because the value you'd be exposing represents the ability to perform some manipulation on your model object. So don't call it "action"ButtonEnabled, call it can"Action".

You can even use +setKeys:triggerChangeNotificationsForDependentKey: to indicate that changes to the values of any of the keys used to determine whether you can perform the desired action will result in an update of the key indicating whether the action can be performed. Or you can just use a setter to manipulate its value...

-- Chris

--
Chris Hanson <email@hidden>
http://www.livejournal.com/users/chanson/
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 >Bindings paradigm (From: Gwynne <email@hidden>)



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