/// <summary>
/// Handles changes to the AnimatedScrollHandler property.
/// </summary>
/// <param name="d">
/// The <see cref="DependencyObject"/> on which
/// the property has changed value.
/// </param>
/// <param name="e">
/// Event data that is issued by any event that
/// tracks changes to the effective value of this property.
/// </param>
private static void OnAnimatedScrollHandlerChanged(
DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ScrollViewerAnimatedScrollHandler oldAnimatedScrollHandler = (ScrollViewerAnimatedScrollHandler)e.OldValue;
ScrollViewerAnimatedScrollHandler newAnimatedScrollHandler = (ScrollViewerAnimatedScrollHandler)d.GetValue(AnimatedScrollHandlerProperty);
var scrollViewer = d as ScrollViewer;
Debug.Assert(scrollViewer != null);
if (oldAnimatedScrollHandler != null)
{
oldAnimatedScrollHandler.Detach();
}
if (newAnimatedScrollHandler != null)
{
newAnimatedScrollHandler.Attach(scrollViewer);
}
}