Binding NSPopupButton to a set of NSObjects
Binding NSPopupButton to a set of NSObjects
- Subject: Binding NSPopupButton to a set of NSObjects
- From: Bob Peterson <email@hidden>
- Date: Thu, 2 Feb 2006 14:15:58 -0500
This is a rank newbie question, but the documentation and list
archives just aren't helping me. What I want to do is display a set
of arbitrary objects and know which object was selected. Using
selectedIndex seems more than a little indirect and hokey. How do I
directly see the selection as one of the objects that is part of the
displayed set?
#include "B.h"
@interface A : NSObject {
B* currentB;
NSSet* allBs;
}
@interface B : NSObject {
NSString* name;
//...plus many other instance variables...
}
In my nib I have an instanceA1 which is an A. Using IB, I want to
bind an NSPopupButton to instanceA1's allBs property. I'll display
each B's "name" property in the popup. Any time I want to know what
the currently selected B is, I find out by just looking at currentB,
which has been bound to that NSPopupButton, too, somehow. And more,
when I change currentB I want that to change the selection in the
NSPopupButton.
But I just can't grok which bindings get bound where. For example, I
can't find anything in the documentation to explain what is the
'attribute' (or is it a 'property') named "contentObjects", as seen
in Interface Builder's bindings inspector for an NSPopupButton.
Clicking the help button there displays a page with the heading "No
pages with your search words were found". When I looked in the
manual for NSPopupButton and NSArrayController Bindings, there is no
obvious mention of this.
I -have- been able to display B.name. I can even set up the sort
descriptor and use arrangedObjects. But that's as far as I have gotten.
Thanks all,
\bob
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