static void item_PreviewMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
TimeSlider slider = (TimeSlider)sender;
ContentAdorner popup = GetPopupAdorner(slider);
if (popup == null)
{
popup = new ContentAdorner(slider);
slider.SetValue(PopupAdornerProperty, popup);
AdornerLayer layer = AdornerLayer.GetAdornerLayer((Visual)slider.Parent);
layer.Add(popup);
}
popup.Visibility = Visibility.Visible;
Track _track = slider.Template.FindName("PART_Track", slider) as Track;
Point position = e.GetPosition(slider);
popup.Content = _track.ValueFromPoint(position);
position.Y = slider.ActualHeight / 2.0;
popup.PlacementOffset = position;
}
