private void OnRollerSelectionChanging(object sender, SelectionChangingRoutedEventArgs e)
{
if (e.SelectedIndex == -1)
{
e.Cancel = true;
}
}
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
{
var args = new SelectionChangingRoutedEventArgs(SelectionChangingEvent, e.RemovedItems, e.AddedItems, SelectedIndex);
RaiseEvent(args);
if (args.Cancel)
{
e.Handled = true;
return;
}
foreach (var item in e.AddedItems)
{
var rollerItem = ItemContainerGenerator.ContainerFromItem(item) as RollerItem;
if (rollerItem != null)
{
rollerItem.InternalSetIsSelected(true);
}
}
foreach (var item in e.RemovedItems)
{
var rollerItem = ItemContainerGenerator.ContainerFromItem(item) as RollerItem;
if (rollerItem != null)
{
rollerItem.InternalSetIsSelected(false);
}
}
UpdateRoller();
base.OnSelectionChanged(e);
}