public void Bind(ICollection<IDomainHierarchy> items, IDomainHierarchy target, bool addEmpty = false)
{
if (items == null) throw new ArgumentNullException("items");
_type = items.First().GetType().Name;
_button.Text = target.IsNullOrEmpty() ? string.Format(_defaultText, _type) : target.Title;
_button.CommandArgument = target.IsNullOrEmpty() ? string.Empty : target.Id.ToString();
AddEmpty(_tree, target, addEmpty);
using (new ObjectScope<IDomainHierarchy>(items.ToList()))
{
var roots = items.Where(i => IsRoot(i, items));
foreach (var root in roots) Bind(_tree, root, target);
}
}
private static bool IsRoot(IDomainHierarchy target, ICollection<IDomainHierarchy> items)
{
if (target.IsNullOrEmpty()) return false;
var parent = target.GetParent();
if (parent.IsNullOrEmpty()) return true;
return !items.Contains(parent);
}