On Sep 9, 2010, at 7:59 AM, k...@highrolls.net wrote:

> It is my understanding that an NSOutlineView is only 'populated' by using its 
> Delegate Methods.
> 
> My manager (a Windows guy with no Cocoa) claims the NSOutlineView can be 
> directly manipulated as in add root, add child etc.

NSOutlineView does not have any methods for manipulating the tree of items 
displayed therein, because conceptually speaking it has no items. They belong 
to the datasource, and the outline view asks for them anew every time it needs 
to display a region of itself.

NSTreeController does offer some direct manipulation functionality, and its 
support for bindings will make it easy to use with NSOutlineView—that is until 
you run into one of the many infamous NSController bugs or limitations. But 
often you really want to make your changes to the model rather than the 
controller, particularly if your model is already in the same hierarchy you 
intend to display in the outline view. In that case your controller object 
mightn't need any hierarchy management of its own, rather only serving as a 
connection point between the model and view.

HTH,
--Kyle Sluder_______________________________________________

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