MainWindow.xaml.cs

using System.Windows;
using System.Windows.Input;

namespace UI_Virtualization_And_Wraparound
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.visualizationLayer.VirtualizationSource = new VirtualizationSource(this.LayoutRoot.DataContext as ExampleViewModel);
        }

        private void Store_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            ExampleViewModel exampleViewModel = this.LayoutRoot.DataContext as ExampleViewModel;
            FrameworkElement control = sender as FrameworkElement;
            if (exampleViewModel != null && control != null)
            {
                StoreLocation storeLocation = control.DataContext as StoreLocation;
                if (storeLocation != null)
                {
                    if (exampleViewModel.ZoomLevel == 19 &&
                        exampleViewModel.Center == storeLocation.Location)
                    {
                        exampleViewModel.ZoomLevel = 10;
                    }
                    else
                    {
                        exampleViewModel.ZoomLevel = 19;
                        exampleViewModel.Center = storeLocation.Location;
                    }
                }
                e.Handled = true;
            }
        }

        private void Area_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            ExampleViewModel exampleViewModel = this.LayoutRoot.DataContext as ExampleViewModel;
            FrameworkElement control = sender as FrameworkElement;
            if (exampleViewModel != null && control != null)
            {
                StoreLocation storeLocation = control.DataContext as StoreLocation;
                if (storeLocation != null)
                {
                    exampleViewModel.ZoomLevel = 11;
                    exampleViewModel.Center = storeLocation.Location;
                }
                e.Handled = true;
            }
        }
    }
}