/// <summary>
/// <see cref="Source"/> PropertyChangedCallback function.
/// </summary>
/// <param name="d">The <see cref="TitledImage"/> control whose <see cref="Source"/> property changed.</param>
/// <param name="e">DependencyPropertyChangedEventArgs which contains the old and new values.</param>
private static void OnSourcePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ItemViewerControl titledImage = d as ItemViewerControl;
titledImage.OnSourceChanged((ImageSource)e.OldValue, (ImageSource)e.NewValue);
}
/// <summary>
/// <see cref="Title"/> PropertyChangedCallback function.
/// </summary>
/// <param name="d">The <see cref="TitledImage"/> control whose <see cref="Title"/> property changed.</param>
/// <param name="e">DependencyPropertyChangedEventArgs which contains the old and new values.</param>
private static void OnNavigateUriPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ItemViewerControl titledImage = d as ItemViewerControl;
titledImage.OnNavigateUriChanged((string)e.OldValue, (string)e.NewValue);
}