need listener for twin column select

How van implement a listener on a twin column select when moving values from one column to the other?
What listener do I need to implement?

yusuf nazir: How van implement a listener on a twin column select when moving values from one column to the other?
What listener do I need to implement?

Set your TwinColSelect immediate by saying:

select.setImmediate(true);

And add a com.vaadin.data.Property.ValueChangeListener to the select.

Thanks,

I always forget the immediate part.