See the - (id)targetForAction:(SEL)aSelector method. When adding context menu items, if the target for the menu item's action would be nil, just don't add the menu item. However, I recommend adding all menu items that are ever available and just disabling the ones that aren't currently available. Doing that will preserve user's muscle memories about where each item is in the list. Plus, it will let users know what items are sometimes available even if they are not currently available.
For more options, see targetForAction:to:from: Finds an object that can receive the message specified by the given selector. - (id)targetForAction:(SEL)anAction to:(id)aTarget from:(id)sender Discussion If anAction is NULL, nil is returned. If aTarget is nil, NSApp looks for an object that can respond to the message—that is, an object that implements a method matching anAction. If aTarget is not nil, aTarget is returned. The search begins with the first responder of the key window. If the first responder does not handle the message, it tries the first responder’s next responder and continues following next responder links up the responder chain. If none of the objects in the key window’s responder chain can handle the message, NSApp asks the key window’s delegate whether it can handle the message. If the delegate cannot handle the message and the main window is different from the key window, NSApp begins searching again with the first responder in the main window. If objects in the main window cannot handle the message, NSApp tries the main window’s delegate. If it cannot handle the message, NSApp asks itself. If NSApp doesn’t handle the message, it asks the application delegate. If there is no object capable of handling the message, nil is returned. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
