public DataSource(NSOutlineViewController <Node> owner, NSOutlineView treeView)
{
this.owner = owner;
this.treeView = treeView;
this.nodeToItem = new Dictionary <ITreeNode, NSNodeItem>();
this.rootItem = CreateItem(EmptyTreeNode.Instance);
}
NSNodeItem CreateItem(ITreeNode node)
{
var result = new NSNodeItem {
Node = node
};
nodeToItem.Add(node, result);
return(result);
}
public bool TryMapNodeToItem(ITreeNode node, out NSNodeItem item)
{
return(nodeToItem.TryGetValue(node, out item));
}
NSObject ToObject(NSNodeItem node) => node == rootItem ? null : node;
