Re: NSMenu and NSMenuItem help

FROM : Thomas Lachand-Robert
DATE : Thu Jan 10 19:21:21 2002

Le jeudi 10 janvier 2002, ` 05:41 , Jeff LaMarche a icrit :

> On Thursday, January 10, 2002, at 12:43  AM, Thomas Lachand-Robert wrote:
>
>> What is surprising? RTFM. NSMenuItem doesn't respond to itemAtIndex (it
>> makes sense: a menu item doesn't have pieces inside). You are confusing
>> with NSMenu. Why do you cast that way to NSMenu* BTW ? Certainly the
>> compiler has warned you that putting an NSMenu* in an NSMenuItem* is
>> incorrect: read the warnings, and read the doc, too. Similarly the
>> assignment to appMenu is incorrect.
>
> Thank you for your assumption that I didn't read the manual. Now, let's
> discuss the problem and the reality, because I did not post a question
> without reading, I spent several hours trying to figure this out.  The
> compiler was NOT warning, and an NSMenu CAN contain NSMenus (submenus) as
> well as NSMenuItem. Perhaps you should have RTFM before you responded.
>
No it cannot. From NSMenu:
Inherits from:
NSObject

Conforms to:
NSCoding
NSCopying
NSObject (NSObject)

-(void)insertItem:(id <NSMenuItem>)newItem atIndex:(int)index
-(id <NSMenuItem>)itemAtIndex:(int)index

NSMenu doesn't conform to protocol NSMenuItem (only the class NSMenuItem
does), so NSMenu cannot contain NSMenus. For NSMenu to have submenu, it
must have some NSMenuItem having submenus.

> So, instead of berating me, perhaps you could tell me why the compiler is
> telling me that I have pulled down an NSMenuItem * when NSLog is telling
> me I've pulled down an NSMenu? Or why I get a runtime error but not a
> compiler warning (yes, even without the cast). Certainly the item at
> index 0 of my main application menu is the Apple menu, which is an NSMenu
> and not an NSMenuItem. And if you don't know the answer, kindly say
> nothing because I don't need crap from self-righteous people, which
> fortunately there are not a lot of on this list.
>
>
The run-time error is significant here. I don't know for the NSLog, I
would need to read the exact NSLog statement to get an idea.

Anyway I gave you a solution that works for me, and S. Sudre gave a
similar one in another message.


Thomas Lachand-Robert
********************** <email_removed>
<< Et le chemin est long du projet ` la chose. >> Molihre, Tartuffe.