Clear Combox items and Property.ValueChangeListener

Hi, all.
We need to provide a way to our users to search members in our ldap with a comboBox. To do so, i have subclass
comboBox and overwrite the changeVariables method.

public class SearchComboBox extends ComboBox {

    private MemberDao memberDao;

    public SearchComboBox() {
        AccessManagerApplication app = (AccessManagerApplication) Root.getCurrentRoot();
        memberDao = (MemberDao) app.getBean("memberDao");

    public void changeVariables(Object source, Map<String, Object> variables) {
        String filterString = (String) variables.get("filter");

        if (filterString != null && filterString.length() > 2) {
            List<Member> members = memberDao.retrieveAllByName(filterString, null, BUnit.A_UNIT);

            for (Member member : members) {

        } else {
        super.changeVariables(source, variables);


And in another class that implements Property.ValueChangeListener, i call my SearchComboBox but the event is
never fired

public class Header extends HorizontalLayout implements Property.ValueChangeListener {
    private SearchComboBox searchBox;
    public Header() {
        searchBox = new SearchComboBox();
    public void valueChange(ValueChangeEvent event) {
        Property<String> property = event.getProperty();
        /****** The notification is never shown ******/

I can’t manage to work it out… Also is there a way to put a “timeout” in my search. Like i want (let’s say)
250 milli sec between each key stroke instead of instant server request

Thanks a lot

Ok. I figured it out.
If i can help anyone having the same problem, please ask.

Hi Jimmy

Can you tell us how did you do it?

Can you please provide the solution for this