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DragNDrop in NSOutlineView with CoreData

Subject: DragNDrop in NSOutlineView with CoreData
From: Cyril Frendo <email@hidden>
Date: Fri, 29 Jul 2005 21:33:03 +0200
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Delivered-to: email@hidden

Hi, I would like to implement drag'n drop inside an NSOutlineView binded to an NSTreeController managing entity objects from CoreData. The result should behave like a sort of finder window allowing to move the file node inside the tree structure. The nice part of CoreData binding is that it manages almost all outlineview's delegate and datasource methods ... but not drag'ndrop.

My problem is drag'ndrop methods must be implemented by the NSOutlineView's datasource. But here, the DataSource is the managedObjectContext. Is there any other solution than implementing "by hand" all the methods inside a datasource object who will forward all changes to the NSManagedObjectContext ?

Thanks to all.
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