cwo = new CEPWindowOperatorsDropdown( c );
cwo.addValueChangeHandler( new ValueChangeHandler<OperatorSelection>() {
public void onValueChange(ValueChangeEvent<OperatorSelection> event) {
OperatorSelection selection = event.getValue();
String selected = selection.getValue();
c.getWindow().setOperator( selected );
}
} );
hp.add( cwo );