A Silverlight custom control for zooming and panning with a small window to see he image with thumb

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace ZoomAndPan
{
    public static class AnimationHelper
    {
        
        public static void StartAnimation(UIElement animatableElement, DependencyProperty dependencyProperty, double toValue, double animationDurationSeconds)
        {
            StartAnimation(animatableElement, dependencyProperty, toValue, animationDurationSeconds, null);
        }
        public static void StartAnimation(UIElement animatableElement, DependencyProperty dependencyProperty, double toValue, double animationDurationSeconds, EventHandler completedEvent)
        {
            double fromValue = (double)animatableElement.GetValue(dependencyProperty);

            DoubleAnimation animation = new DoubleAnimation();
            animation.From = fromValue;
            animation.To = toValue;
            animation.Duration = TimeSpan.FromSeconds(animationDurationSeconds);

            animation.Completed += delegate(object sender, EventArgs e)
            {
                animatableElement.SetValue(dependencyProperty, animatableElement.GetValue(dependencyProperty));
                CancelAnimation(animatableElement, dependencyProperty);

                if (completedEvent != null)
                {
                    completedEvent(sender, e);
                }
            };

            //animation.Freeze();

            //animatableElement.BeginAnimation(dependencyProperty, animation);
        }
     
        public static void CancelAnimation(UIElement animatableElement, DependencyProperty dependencyProperty)
        {
            //animatableElement.BeginAnimation(dependencyProperty, null);
        }
    }
}