CheckBox headerClickListenerCheckbox = new CheckBox(
"Header click listener");
headerClickListenerCheckbox.setImmediate(true);
headerClickListenerCheckbox.addListener(new ValueChangeListener() {
private HeaderClickListener headerClickListener = new HeaderClickListener() {
@Override
public void headerClick(HeaderClickEvent event) {
String type = event.isDoubleClick() ? "Double click"
: "Click";