protected override void Invoke(object parameter)
{
if (IsChecked)
{
if (EnableSelectedCache)
{
ItemsSelected(TargetElement.Items, true);
foreach (var item in TargetElement.SelectedItems)
{
_cache.Add(item);
}
TargetElement.SetValue(CacheSelectedItemsProperty, _cache.ToList());
}
else
{
TargetElement.SelectAll();
}
}
else
{
TargetElement.UnselectAll();
if (EnableSelectedCache)
{
foreach (var item in TargetElement.Items)
{
_cache.Remove(item);
}
ItemsSelected(TargetElement.Items, false);
TargetElement.SetValue(CacheSelectedItemsProperty, _cache.ToList());
}
else
{
TargetElement.UnselectAll();
}
}
AssociatedObject.SetValue(SelectedItemsCountProperty, _cache.Count);
}