A WPF Custom Control for Zooming and Panning

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Windows.Media;

namespace ZoomAndPanSample
{
    /// <summary>
    /// Defines the data-model for a simple displayable rectangle.
    /// </summary>
    public class RectangleData : INotifyPropertyChanged
    {
        #region Data Members

        /// <summary>
        /// The X coordinate of the location of the rectangle (in content coordinates).
        /// </summary>
        private double x = 0;

        /// <summary>
        /// The Y coordinate of the location of the rectangle (in content coordinates).
        /// </summary>
        private double y = 0;

        /// <summary>
        /// The width of the rectangle (in content coordinates).
        /// </summary>
        private double width = 0;

        /// <summary>
        /// The height of the rectangle (in content coordinates).
        /// </summary>
        private double height = 0;

        /// <summary>
        /// The color of the rectangle.
        /// </summary>
        private Color color;

        /// <summary>
        /// Set to 'true' when the rectangle is selected in the ListBox.
        /// </summary>
        private bool isSelected = false;

        #endregion Data Members

        public RectangleData()
        {
        }

        public RectangleData(double x, double y, double width, double height, Color color)
        {
            this.x = x;
            this.y = y;
            this.width = width;
            this.height = height;
            this.color = color;
        }

        /// <summary>
        /// The X coordinate of the location of the rectangle (in content coordinates).
        /// </summary>
        public double X
        {
            get
            {
                return x;
            }
            set
            {
                x = value;

                OnPropertyChanged("X");
            }
        }

        /// <summary>
        /// The Y coordinate of the location of the rectangle (in content coordinates).
        /// </summary>
        public double Y
        {
            get
            {
                return y;
            }
            set
            {
                y = value;

                OnPropertyChanged("Y");
            }
        }

        /// <summary>
        /// The width of the rectangle (in content coordinates).
        /// </summary>
        public double Width
        {
            get
            {
                return width;
            }
            set
            {
                width = value;

                OnPropertyChanged("Width");
            }
        }

        /// <summary>
        /// The height of the rectangle (in content coordinates).
        /// </summary>
        public double Height
        {
            get
            {
                return height;
            }
            set
            {
                height = value;

                OnPropertyChanged("Height");
            }
        }

        /// <summary>
        /// The color of the rectangle.
        /// </summary>
        public Color Color
        {
            get
            {
                return color;
            }
            set
            {
                color = value;

                OnPropertyChanged("Color");
            }
        }

        /// <summary>
        /// Set to 'true' when the rectangle is selected in the ListBox.
        /// </summary>
        public bool IsSelected
        {
            get
            {
                return isSelected;
            }
            set
            {
                isSelected = value;

                OnPropertyChanged("IsSelected");
            }
        }

        #region INotifyPropertyChanged Members

        /// <summary>
        /// Raises the 'PropertyChanged' event when the value of a property of the data model has changed.
        /// </summary>
        private void OnPropertyChanged(string name)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(name));
            }
        }

        /// <summary>
        /// 'PropertyChanged' event that is raised when the value of a property of the data model has changed.
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }
}