Deep Zoom - SlideShow

I was wondering how best to showcase the functionality from my last post and the idea of SlideShow popped up in my head. Also, I was bored and wanted to play around with Deep Zoom some more...

Update Oct 14, 2008: Removed the example from this post to reduce load time of this page. Please use the example from this post, DeepZoom sample ported to Silverlight 2 Beta 2, to try the functionality.

Click on the Start Slide button to activate the slide show. Click on the button again to stop the slide show.

The code to enable slide show is very simple. Most of the work is done by the function described in my last post.

Xaml

<Button Grid.Column="2" x:Name="buttonSlideshow" Width="70" Content="Start Slide" IsEnabled="False"/>

Code

int _slideshowImageIndex = 0;
System.Windows.Threading.DispatcherTimer _myDispatcherTimer;

msi.Loaded += delegate(object sender, RoutedEventArgs e)
{
    _myDispatcherTimer = new System.Windows.Threading.DispatcherTimer();
    _myDispatcherTimer.Tick += new EventHandler(Each_Tick);
    buttonSlideshow.IsEnabled = true;
};

buttonSlideshow.Click += delegate(object sender, RoutedEventArgs e)
{
    if ((string)buttonSlideshow.Content == "Start Slide") {
        buttonSlideshow.Content = "Stop Slide";
        StartSlideShow();
    }
    else {
        buttonSlideshow.Content = "Start Slide";
        StopSlideShow();
    }
};

public void StartSlideShow()
{
    // Set the timer interval to 200 ms so that the tick event is called immediately
    _myDispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0, 200);
    _myDispatcherTimer.Start();
}

public void StopSlideShow()
{
    _myDispatcherTimer.Stop();
}

public void Each_Tick(object o, EventArgs sender)
{
    // Reset the timer to 5 sec so that each slide appears after 5 seconds
    _myDispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0, 5000);
    ZoomFullAndCenterImage(_slideshowImageIndex);
    if (++_slideshowImageIndex == msi.SubImages.Count)
        _slideshowImageIndex = 0;
}