On Jun 3, 2008, at 8:57 PM, Jerry Krinock wrote:
I use an NSOutlineView. I have implemented an action, myAction,
which is targetted by a main menu item, which is in turn assigned
the keyboard shortcut cmd+upArrow.
In some situations, myAction is not allowed, so -validateMenuItem:
in my window controller subclass returns NO. I see that -
validateMenuItem: is invoked whenever the menu is displayed, and it
is also invoked whenever cmd+upArrow is typed.
When validateMenuItem: returns NO for myAction, the menu behaves as
expected: Item is disabled. And when I run my app in Mac OS
10.4.11, the keyboard shortcut behaves as expected: NSBeep with no
action.
But running in 10.5.3, upon typing cmd+upArrow, when -
validateMenuItem: returns NO, there is no NSBeep and instead a
different action happens: The selection is moved up. Of course,
this is the action that NSOutlineView normally performs in response
to upArrow without the cmd key modifier.
So, it's like NSOutlineView steps in and says, "So sorry he couldn't
do what you want, but here's a similar action of mine you might like!"
Is this a bug or a feature? I've read through the "Numerous
NSTableView and NSOutlineView enhancements" in the Leopard AppKit
Release Notes [1] but can't find this one.
Feature!
First off, great job reading the release notes. That makes me happy!
Second, I suggest reading them further :)
http://developer.apple.com/releasenotes/Cocoa/AppKit.html#NSMenu
Disabled key equivalents passed throughPrior to Leopard, key
equivalents corresponding to disabled menu items would be ignored.
In Leopard, your application now has a chance to handle these. For
example, a key equivalent for control-K on a disabled menu item will
no longer block the emacs shortcut in an NSTextView, in Leopard.
-corbin
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