sorry dudu, i am new to wicket as well,
have you came across this link yet?
http://cwiki.apache.org/WICKET/dropdownchoice-examples.html
if not give it a shot
Mathias P.W Nilsson wrote:
>
> <html>
> <head>
> <title>Wicket Quickstart Archetype Homepage</title>
> </head>
> <body>
>
> <form wicket:id="loginForm">
>
> <strong>Wicket Quickstart Archetype Homepage</strong>
> <br/><br/>
> message will be here
>
> <select wicket:id="category" name="category">
> <option>Some Person</option>
> <option>Some Other Person</option>
> </select>
>
> <input type="submit" wicket:id="Submit">
> </form>
> </body>
> </html>
>
>
> ===================================
> CODE
> ===================================
> package se.boardstore.model;
>
> import java.io.Serializable;
> import java.util.ArrayList;
> import java.util.List;
>
> import se.boardstore.entities.store.Store;
>
> public class Category implements Serializable{
>
> private Long id;
> private String identifier;
> private Long sortOrder;
> private String name;
> private String shortDescription;
> private String longDescription;
> private Store store;
> private Long cachedBalance;
> private List<Category> categories = new ArrayList<Category>();
>
> public Category(){
>
> }
>
> public String getIdentifier() {
> return identifier;
> }
>
> public void setIdentifier(String identifier) {
> this.identifier = identifier;
> }
>
> public Long getSortOrder() {
> return sortOrder;
> }
>
> public void setSortOrder(Long sortOrder) {
> this.sortOrder = sortOrder;
> }
>
> public Long getId() {
> return id;
> }
>
> public String toString(){
> StringBuffer buffer = new StringBuffer();
> buffer.append( "[Id: " + id + "]" );
> buffer.append( "[Identifier: " + identifier + "]" );
> buffer.append( "[Sortorder: " + sortOrder + "]" );
>
> return buffer.toString();
> }
>
>
> public String getName() {
> return name;
> }
>
>
> public void setName(String name) {
> this.name = name;
> }
>
>
> public String getShortDescription() {
> return shortDescription;
> }
>
>
> public void setShortDescription(String shortDescription) {
> this.shortDescription = shortDescription;
> }
>
>
> public String getLongDescription() {
> return longDescription;
> }
>
>
> public void setLongDescription(String longDescription) {
> this.longDescription = longDescription;
> }
>
>
> public Store getStore() {
> return store;
> }
>
>
> public void setStore(Store store) {
> this.store = store;
> }
>
>
> public List<Category> getCategories() {
> return categories;
> }
>
>
> public void setId(Long id) {
> this.id = id;
> }
>
> public Long getCachedBalance() {
> return cachedBalance;
> }
>
> public void setCachedBalance(Long cachedBalance) {
> this.cachedBalance = cachedBalance;
> }
>
> public void addCategory( Category category ){
> this.categories.add( category );
> }
>
> }
>
>
> ============================================
> CODE
> =============================================
>
>
> package se.edgesoft;
>
> import java.io.Serializable;
> import java.util.List;
>
> import org.apache.wicket.PageParameters;
> import org.apache.wicket.extensions.markup.html.form.select.SelectOption;
> import org.apache.wicket.markup.html.WebPage;
> import org.apache.wicket.markup.html.basic.Label;
> import org.apache.wicket.markup.html.form.Button;
> import org.apache.wicket.markup.html.form.DropDownChoice;
> import org.apache.wicket.markup.html.form.Form;
> import org.apache.wicket.markup.html.form.IChoiceRenderer;
> import org.apache.wicket.markup.html.list.ListItem;
> import org.apache.wicket.markup.html.list.ListView;
> import org.apache.wicket.model.LoadableDetachableModel;
> import org.apache.wicket.model.PropertyModel;
> import org.apache.wicket.spring.injection.annot.SpringBean;
>
> import se.boardstore.dao.CategoryDAO;
>
>
> /**
> * Homepage
> */
> public class HomePage extends WebPage {
>
> private static final long serialVersionUID = 1L;
> @SpringBean(name="categoryDao")
> private CategoryDAO categoryDAO;
> List<se.boardstore.model.Category> categories;
> public HomePage(final PageParameters parameters) {
>
> Form form = new LoginForm( "loginForm" );
> add(form);
>
> form.add(new Label("message", "If you see this message wicket is
> properly configured and running"));
>
> categories =
> categoryDAO.getProxiedCategories(se.boardstore.entities.store.Store.EDDYEMERY_EU);
>
> DropDownChoice ddc =
> new DropDownChoice(
> "category",
> new PropertyModel( new se.boardstore.model.Category(),
> "name"),
> new LoadableDetachableModel() {
> private static final long
> serialVersionUID = 1L;
>
> @Override
> protected Object load() {
> return HomePage.this.categories;
> }
>
>
> },new TestChoiceRenderer()
> ){
> private static final long
> serialVersionUID = 1L;
>
> protected boolean wantOnSelectionChangedNotifications()
> {
> return true;
> }
>
> /**
> * Called when a option is selected of a dropdown list that
> wants to be
> * notified of this event.
> *
> * @param newSelection The newly selected object of the
> backing model
> */
> protected void onSelectionChanged(Object newSelection) {
>
> System.out.println( newSelection.getClass() );
>
> //se.boardstore.model.Category category =
> (se.boardstore.model.Category) newSelection;
> //System.out.println( category.getName() );
> }
> };
>
> form.add( ddc );
>
>
>
> Button submit = new Button( "Submit" );
> form.add( submit );
>
>
> }
>
> class LoginForm extends Form{
>
> public LoginForm( String identifier ){
> super( identifier );
> }
>
> public void onSubmit(){
> System.out.println( "JEpp" );
> AutoCompletePage p = new AutoCompletePage( new
> PageParameters());
> setResponsePage( p );
> }
> }
>
> class TestChoiceRenderer implements IChoiceRenderer {
>
> public Object getDisplayValue(Object object) {
> // I don't know if it can be anything other...??
> if (object instanceof se.boardstore.model.Category) {
> se.boardstore.model.Category so =
> (se.boardstore.model.Category) object;
>
>
> return so.getName();
> }
> return null;
> }
>
> public String getIdValue(Object key, int index) {
> // I don't know if it can be anything other...??
> if (key instanceof se.boardstore.model.Category) {
> se.boardstore.model.Category selectOption =
> (se.boardstore.model.Category) key;
> return selectOption.getId().toString();
>
> }
> return null;
> }
>
> }
>
> }
>
>
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