private void AddItem(object value)
{
if (_layoutManager == null) return;
var item = new ListItem();
var editor = (DefaultEditor) _itemContentFactory(value);
editor.SizeMode = SizeMode.Absolute;
item.SetEditor(editor);
item.Removed += Item_Removed;
_layoutManager.Controls.Add(item);
UpdateWidth();
UpdateItemText();
_layoutManager.ScrollControlIntoView(item);
}
