Artemis/src/Artemis.UI/Extensions/TreeViewItemExtensions.cs

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace Artemis.UI.Extensions
{
    public static class TreeViewItemExtensions
    {
        public static int GetDepth(this TreeViewItem item)
        {
            TreeViewItem parent;
            while ((parent = GetParent(item)) != null)
                return GetDepth(parent) + 1;
            return 0;
        }

        private static TreeViewItem GetParent(TreeViewItem item)
        {
            DependencyObject parent = VisualTreeHelper.GetParent(item);
            while (!(parent is TreeViewItem || parent is TreeView))
                parent = VisualTreeHelper.GetParent(parent);
            return parent as TreeViewItem;
        }
    }
}