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validateMenuItem: and the Responder Chain

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validateMenuItem: and the Responder Chain

Subject: validateMenuItem: and the Responder Chain
From: Tom Birch <email@hidden>
Date: Mon, 7 Feb 2005 23:17:39 +1100

When a menu item's target is first responder (ie nil) and different classes in the responder chain each implement validateMenuItem:, eg a subclass of NSDocument and NSApp's delegate, then how does it decide to validate or not? Does it poll all objects in the chain that respond to this method, and take the OR of the results? because it doesn't really make sense for it to let one take precedence over another since the common behaviour is to return NO unless the NSMenuItem is a specific one and certain conditions are met.

so yeah, how does it work? This is purely for my interests, I'm not writing an app that relies on this, but I'd still like to know

cheers,
Tom

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