/// <summary>
///
/// </summary>
/// <param name="caption"></param>
/// <param name="index"></param>
/// <param name="callback"></param>
/// <returns></returns>
public GButton AddItemAt(string caption, int index, EventCallback0 callback)
{
GObject obj = _list.GetFromPool(_list.defaultItem);
_list.AddChildAt(obj, index);
GButton item = (GButton)obj;
item.title = caption;
item.data = callback;
item.grayed = false;
Controller c = item.GetController("checked");
if (c != null)
{
c.selectedIndex = 0;
}
return(item);
}