private void NameChangedHandler(string prevName, IDataItem item)
{
if (prevName == item.Name) // ignore identical names
{
return;
}
if (mNameToItem.ContainsKey(item.Name)) // check duplicate names
{
item.CancelNameChange();
throw new ChartDuplicateItemException(String.Format("A {0} by that name already exists in the data source", ItemTypeName));
}
if (prevName != null && mNameToItem.Remove(prevName) == false)
{
item.CancelNameChange();
throw new ChartException(String.Format("Renaming {0} failed", ItemTypeName));
}
if (item.Name != null)
{
mNameToItem.Add(item.Name, (T)item);
}
if (NameChanged != null)
{
NameChanged(prevName, item);
}
}