Hi, I have a source list (an NSOutlineView bound to an NSTreeController), with three sections: one containing fixed items, one dynamic items, and one items the user can add and remove (c.f. the iTunes source list sections 'Library', 'Shared' and 'Playlists').
Because my add and remove controls are only applicable to a particular subtree, I have an extra controller for that part of the model; my add and remove buttons call methods on that controller rather than the NSTreeController. The container in the model for those items is a KVO-compliant mutable array obtained by calling mutableArrayValueForKey:@"children" on their parent node (an NSMutableDictionary). The add and remove buttons can therefore manipulate the model directly and the view is kept up to date. All well and good so far. However, I would like to use Core Data to manage these items. I figure I could have my add and remove methods insert and remove objects from the managed object context as well as the KVO-compliant mutable array, but when I undo such an action, the change will only be reflected in the managed object context. I could create an extra entity to act as a collection for those items and have the add and remove methods manipulate that object, but I don't see how this collection could then be KVO-related to its parent node as per mutableArrayValueForKey:. Is it possible to achieve what I'm trying to do -- managing part but not all of a tree also using bindings? Thanks, Hamish _______________________________________________ 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]
