Just ran into the same problem and came up with HHValidatedButton:
http://www.bernard-web.com/pierre/blog/index.php?id=6542976061063123843
Pierre Bernard
On Jul 1, 2009, at 11:24 PM, Bill Cheeseman wrote:
For years, the "Implementing Validation" section of Apple's "User
Interface Validation" document has said the following:
"Before it is displayed, a user interface item checks to see if its
target implements validateUserInterfaceItem:. If it does, then the
enabled status of the item is determined by the return value of the
method. You can therefore conditionally enable or disable an item by
implementing validateUserInterfaceItem: in the target object."
This has never been true. Right?
My custom window controller implements the action method for a
button, so it is the button's target, and it also implements -
validateUserInterfaceItem:, all according to the User Interface
Validation document. But my -validateUserInterfaceItem: method is
never called.
If I want it to be called automatically, by analogy to -
validateMenuItem:, I have to override NSWindow's -update method, by
analogy to -[NSMenu update]. In my override of -update, I have to do
for myself what the document claims already happens -- or I have to
observe NSWindow's -NSWindowDidUpdateNotification. Right?
--
Bill Cheeseman
b...@cheeseman.name
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