Re: NSPopUpButton questions
Re: NSPopUpButton questions
- Subject: Re: NSPopUpButton questions
- From: Paul Bruneau <email@hidden>
- Date: Sun, 6 Dec 2009 14:11:23 -0500
On Dec 6, 2009, at 12:29 PM, Andy Lee wrote:
> On Dec 6, 2009, at 11:34 AM, Matt Neuburg wrote:
>> On Sat, 5 Dec 2009 20:29:25 -0500, "email@hidden" <email@hidden>
>> said:
>>> The Apple docs for NSPopUpButtons says to avoid accessing it's NSMenu directly
>> because it may need to do housekeeping.
>>
>> Where do the Apple docs say that? I'm thinking there might be some
>> misunderstanding lurking here. m.
>
> Indeed, there are a few methods where the docs specifically recommend accessing the menu directly, e.g.:
>
> <http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSPopUpButton_Class/Reference/Reference.html#//apple_ref/occ/instm/NSPopUpButton/insertItemWithTitle:atIndex:>
>> Since this method searches for duplicate items, it should not be used if you are adding an item to an already populated menu with more than a few hundred items. Add items directly to the receiver's menu instead.
Yeah, but the OP is right, the Application Menu and Pop-up List Programming Topics for Cocoa says this:
> To implement its menu, the button cell contains an NSMenu object, which in turn contains several NSMenuItem objects, one for each item in the menu. Avoid invoking methods on the NSMenu object directly, but instead invoke methods on theNSPopUpButton instance, which may need to do some housekeeping before invoking the appropriate methods on the menu. However, you can retrieve the menu with the NSPopUpButton method menu. The NSPopUpButton methods you use most often are the methods that tell you which item is selected.
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/MenuList/Articles/HowMenusWork.html
I have to say this has never stopped me from molesting the menu directly. But I disagree with the HIG on popup menus so I'm often on the wrong side of the law regarding this topic._______________________________________________
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