Bullet Graphs - A Custom Control - WPF vs. Windows Forms

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Data;
using System.Globalization;

namespace WpfBulletGraph
{
    /// <summary>
    /// Converts the given value into an array of scale bar ticks between zero and the value given.
    /// </summary>
    class ScaleBarConverter : IValueConverter 
    {
        // the maximum nubmer of ticks which should be rendered
        private static int MaximumNumberOfTicks = 7;

        // multipliers which, when applied is sequence, provide an aesthetic scalebar
        private static double[] Multipliers = new double[] { 2.5f, 2, 2 };

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null || value.Equals(0.0))
                return null;

            double range = (double)value;
            
            // determine the tick spacing
            double tickSpacing = range > 0 ? 1 : -1;            
            int multiplierIndex = 0;
            while (Math.Abs(range / tickSpacing) > MaximumNumberOfTicks)
            {
                tickSpacing *= Multipliers[multiplierIndex % Multipliers.Length];
                multiplierIndex++;
            }

            // determine the total number of scalebar ticks
            int tickCount = (int)(range / tickSpacing) + 1;

            // construct the scale
            double[] scale = new double[tickCount];
            for (int i = 0; i < tickCount; i++)
                scale[i] = i * tickSpacing;

            return scale;
        }

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