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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.ComponentModel;
using System.Collections.ObjectModel;

namespace WpfBulletGraph
{
    /// <summary>
    /// Interaction logic for BulletGraph.xaml
    /// </summary>
    public partial class BulletGraph : UserControl
    {
        #region properties

        [Category("Bullet Graph")]
        [Browsable(true)]
        public double FeaturedMeasure
        {
            get { return BulletGraphWithLegend.GetFeaturedMeasure(this); }
            set { BulletGraphWithLegend.SetFeaturedMeasure(this, value); }
        }

        [Category("Bullet Graph")]
        [Browsable(true)]
        public double ComparativeMeasure
        {
            get { return BulletGraphWithLegend.GetComparativeMeasure(this); }
            set { BulletGraphWithLegend.SetComparativeMeasure(this, value); }
        }

        [Category("Bullet Graph")]
        [Browsable(true)]
        public double GraphRange
        {
            get { return BulletGraphWithLegend.GetGraphRange(this); }
            set { BulletGraphWithLegend.SetGraphRange(this, value); }
        }

        [Category("Bullet Graph")]
        [Browsable(true)]
        public bool LeftToRight
        {
            get { return BulletGraphWithLegend.GetLeftToRight(this); }
            set { BulletGraphWithLegend.SetLeftToRight(this, value); }
        }

        [Category("Bullet Graph")]
        [Browsable(true)]
        public QualitativeRanges QualitativeRanges
        {
            get { return BulletGraphWithLegend.GetQualitativeRanges(this); }
            set { BulletGraphWithLegend.SetQualitativeRanges(this, value); }
        }

        #endregion

        public BulletGraph()
        {
            InitializeComponent();
                   
            // add a handler to the GraphRange property. This is used to determine if the graph plots negative values.
            DependencyPropertyDescriptor dpd = DependencyPropertyDescriptor.FromProperty(BulletGraphWithLegend.GraphRangeProperty, typeof(BulletGraphWithLegend));
            if (dpd != null)
            {
                dpd.AddValueChanged(this, delegate
                {                  
                    // sort the qualitative range items ascending or descending accordingly  
                    qualitativeRangeBar.Items.SortDescriptions.Add(
                        new SortDescription("Maximum", this.GraphRange < 0 ? ListSortDirection.Ascending : ListSortDirection.Descending));

                });
            }

        }


    }

    public class QualitativeRanges : ObservableCollection<QualitativeRange>
    { }

    /// <summary>
    /// Defines a single qualitative range within a bullet graph.
    /// </summary>
    public class QualitativeRange
    {
        private double? maximum;

        public double? Maximum
        {
            get { return maximum; }
            set { maximum = value; }
        }

        private Color color;

        public Color Color
        {
            get { return color; }
            set { color = value; }
        }

        public override string ToString()
        {
            return "Maximum: " + (Maximum.HasValue ? Maximum.ToString() : "<null>") + ", Color: " + Color;
        }
    }
}