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NSOutlineView autosaving of expanded/collapsed state

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NSOutlineView autosaving of expanded/collapsed state

Subject: NSOutlineView autosaving of expanded/collapsed state
From: Ralph Manns <email@hidden>
Date: Sat, 23 Feb 2008 02:58:03 +0100

Hi,

is there a solution on Leopard to implement the autosaving of expanded/ collapsed state of an NSOutlineView (bound to Core Data via NSTreeController). I tried to implement outlineview:persistentObjectForItem; and outlineView:itemForPersistentObject:. But it doesnt't work, because NSTreeNode and NSManagedObject don't encode with NSKeyedArchiver. Is there something I am missing, or couldn't state autosaving be done in Leopard without 'hacks' like in Tiger?

Ralph.
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