private static void ListBox_MouseLeave(object sender, MouseEventArgs e)
{
ListBox lb = sender as ListBox;
// Remove any previous Adorners
AdornerInfo prevInfo = lb.GetValue(AttachedAdornerProperty) as AdornerInfo;
AdornerLayer layer = AdornerLayer.GetAdornerLayer(lb);
if (prevInfo != null)
{
if (layer != null)
{
layer.Remove(prevInfo.Adorner);
lb.ClearValue(AttachedAdornerProperty);
}
}
}
private static void ListBox_MouseMove(object sender, MouseEventArgs e)
{
// Check that we are hovering on a ListBoxItem
ListBox lb = sender as ListBox;
ListBoxItem item =
lb.ContainerFromElement(e.OriginalSource as Visual) as ListBoxItem;
if (item == null)
{
return;
}
// Remove any previous Adorners
AdornerInfo prevInfo = lb.GetValue(AttachedAdornerProperty) as AdornerInfo;
AdornerLayer layer = AdornerLayer.GetAdornerLayer(lb);
if (prevInfo != null)
{
if (prevInfo.ListItem == item)
{
return;
}
layer.Remove(prevInfo.Adorner);
lb.ClearValue(AttachedAdornerProperty);
}
// Attach new adorner to current ListBoxItem
HoverAdorner adorner = new HoverAdorner(item);
adorner.Container.Content = lb.ItemContainerGenerator.ItemFromContainer(item);
adorner.Container.ContentTemplate =
item.FindResource("AdornerTemplate") as DataTemplate;
layer.Add(adorner);
AdornerInfo info = new AdornerInfo();
info.Adorner = adorner;
info.ListItem = item;
lb.SetValue(AttachedAdornerProperty, info);
}