On 23 Jun '08, at 5:10 PM, Michael Hanna wrote:
How do I filter-out the contents of an NSTreeController? I saw an example with NSArrayController by overriding the [NSArrayController -arrangeObjects] method, but NSTreeController doesn't have this method.
I asked about this a month or two ago, and the consensus seemed to be that there isn't any built-in way to filter the contents of the tree.
I've ended up doing the filtering myself. If we call my regular tree model class Item, then I've created a class FilteredItem. This acts as a proxy for an Item, but its -children method filters out the children I don't want to display, and returns FilteredItem proxies for those I do.
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