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Re: building a menu at run-time and enabling the items
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Re: building a menu at run-time and enabling the items

  • Subject: Re: building a menu at run-time and enabling the items
  • From: Glenn Andreas <email@hidden>
  • Date: Fri, 19 Nov 2004 13:07:27 -0600
At 12:02 PM -0600 11/19/04, John Spicer wrote:
I'm building a menu at run-time. I add items to the menu, and each one is given a selector as shown.

The menu items won't enable. I'm not setting a target for the menu item, only a selector. Is this possibly the problem? 


It depends.

If your object that implements the routine method is in the responder chain, it will work fine. If it isn't, it won't (unless something else in the responder chain responds to that selector).

By default, the target is NULL which means "look it up through the first responder (and then up the chain)". This is often the way you want things to work if the menu corresponds to something which may have multiple instances (in multiple windows for different document, for example) since otherwise you may end up doing "foo" on the wrong window's "foo view". On the other hand, if it is something that is a singleton (only one exists in your app) you'll want to set the target to that object (since singletons like this rarely are in the responder chain).


--
Glenn Andreas email@hidden <http://www.gandreas.com/> oh my!
Mad, Bad, and Dangerous to Know
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 >building a menu at run-time and enabling the items (From: John Spicer <email@hidden>)

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