wabbajack/Wabbajack/Themes/LeftMarginMultiplierConverter.cs

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

namespace DarkBlendTheme
{
    public class LeftMarginMultiplierConverter : IValueConverter
    {
        public double Length { get; set; }

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var item = value as TreeViewItem;
            if (item == null)
                return new Thickness(0);

            return new Thickness(Length * item.GetDepth(), 0, 0, 0);
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}