t.addItem(i);
final VerticalLayout l = new VerticalLayout();
l.setId("row-" + i);
l.setHeight(20, Unit.PIXELS);
l.setData(i);
l.addLayoutClickListener(new LayoutClickListener() {
@Override
public void layoutClick(LayoutClickEvent event) {
if (t.isMultiSelect()) {
Set<Object> values = new HashSet<Object>(
(Set<Object>) t.getValue());