Examples of org.apache.wicket.markup.html.list.ListView

Package org.apache.wicket.markup.html.list

Examples of org.apache.wicket.markup.html.list.ListView

org.apache.wicket.markup.html.list.ListView
A ListView is a repeater that makes it easy to display/work with {@link List}s. However, there are situations where it is necessary to work with other collection types, for repeaters that might work better with non-list or database-driven collections see the org.apache.wicket.markup.repeater package. Also notice that in a list the item's uniqueness/primary key/id is identified as its index in the list. If this is not the case you should either override {@link #getListItemModel(IModel,int)}to return a model that will work with the item's true primary key, or use a different repeater that does not rely on the list index. A ListView holds ListItem children. Items can be re-ordered and deleted, either one at a time or many at a time.
Example:
```
 <tbody> <tr wicket:id="rows" class="even"> <td><span wicket:id="id">Test ID</span></td> ... 
```
Though this example is about a HTML table, ListView is not at all limited to HTML tables. Any kind of list can be rendered using ListView.
The related Java code:
```
 add(new ListView<UserDetails>("rows", listData) { public void populateItem(final ListItem<UserDetails> item) { final UserDetails user = item.getModelObject(); item.add(new Label("id", user.getId())); } }); 
```
NOTE: When you want to change the default generated markup it is important to realize that the ListView instance itself does not correspond to any markup, however, the generated ListItems do.
This means that methods like {@link #setRenderBodyOnly(boolean)} and{@link #add(org.apache.wicket.behavior.Behavior)} should be invoked on the {@link ListItem}that is given in {@link #populateItem(ListItem)} method.

WARNING: though you can nest ListViews within Forms, you HAVE to set the setReuseItems property to true in order to have validation work properly. By default, setReuseItems is false, which has the effect that ListView replaces all child components by new instances. The idea behind this is that you always render the fresh data, and as people usually use ListViews for displaying read-only lists (at least, that's what we think), this is good default behavior.
However, as the components are replaced before the rendering starts, the search for specific messages for these components fails as they are replaced with other instances. Another problem is that 'wrong' user input is kept as (temporary) instance data of the components. As these components are replaced by new ones, your user will never see the wrong data when setReuseItems is false.
@author Jonathan Locke @author Juergen Donnerstag @author Johan Compagner @author Eelco Hillenius @param < T> Model object type

   * @param expectedList
   *            expected list in the model of {@link ListView}
   */
  public void assertListView(String path, List expectedList)
  {
    ListView listView = (ListView)getComponentFromLastRenderedPage(path);
    WicketTesterHelper.assertEquals(expectedList, listView.getList());
  }

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        Object wrappedCatalog = Context.javaToJS(getCatalog(), scope);
        ScriptableObject.putProperty(scope, "catalog", wrappedCatalog);
        Context.exit();


        final WebMarkupContainer container = new WebMarkupContainer("results-wrapper");
        final ListView resultsDisplay = 
            new ListView("results", new PropertyModel(this, "results")) {
                protected void populateItem(ListItem item) {
                    item.add(new Label("javascript", new PropertyModel(item.getModel(), "input")));
                    item.add(new Label("result", new PropertyModel(item.getModel(), "response")));
                }
            };

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            add(placeHolder);
        }
        
        // when hacking this service listing code please refer to 
        // http://jira.codehaus.org/browse/GEOS-2114
        ListView view = new ListView("services", getServices()) {
            @Override
            protected void populateItem(ListItem item) {
                ServiceInfo service = (ServiceInfo) item.getModelObject();
                final String serviceId = service.getId();
                item.add( new Label("service", service.getId().toUpperCase()) );
                item.add( new ListView( "versions", service.getVersions()) {
                    @Override
                    protected void populateItem(ListItem item) {
                        Version version = (Version) item.getModelObject();
                        ExternalLink link = new ExternalLink("link", "../ows?service=" + serviceId
                                + "&version=" + version.toString() + "&request=GetCapabilities");

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public class DemoPage extends GeoServerBasePage{
    @SuppressWarnings("serial")
    public DemoPage(){
        List<DemoLinkInfo> links = getGeoServerApplication().getBeansOfType(DemoLinkInfo.class);
        add(new ListView("demoList", links){
            public void populateItem(ListItem item){
                final DemoLinkInfo info = (DemoLinkInfo)item.getModelObject();
                item.add(new BookmarkablePageLink("theLink", info.getComponentClass())
                .add(new Label("theTitle", new StringResourceModel(info.getTitleKey(), (Component)null, null))));
                item.add(new Label("theDescription", new StringResourceModel(info.getDescriptionKey(), (Component)null, null)));

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                cnt.add(selectOneCheckbox(item));
                cnt.setVisible(selectable);
                item.add(cnt);


                // create one component per viewable property
                item.add(new ListView("itemProperties", dataProvider.getVisibleProperties()) {


                    @Override
                    protected void populateItem(ListItem item) {
                        Property<T> property = (Property<T>) item.getModelObject();


                        Component component = getComponentForProperty("component", itemModel,
                                property);
                        
                        if(component == null) {
                            // show a plain label if the the subclass did not create any component
                            component = new Label("component", property.getModel(itemModel));
                        } else if (!"component".equals(component.getId())) {
                            // add some checks for the id, the error message
                            // that wicket returns in case of mismatch is not
                            // that helpful
                            throw new IllegalArgumentException("getComponentForProperty asked "
                                    + "to build a component " + "with id = 'component' "
                                    + "for property '" + property.getName() + "', but got '"
                                    + component.getId() + "' instead");
                        }
                        item.add(component);
                    }


                });
            }


        };
        listContainer.add(dataView);


        // add select all checkbox
        WebMarkupContainer cnt = new WebMarkupContainer("selectAllContainer");
        cnt.add(selectAll = selectAllCheckbox());
        cnt.setVisible(selectable);
        listContainer.add(cnt);
        
        // add the sorting links
        listContainer.add(new ListView("sortableLinks", dataProvider.getVisibleProperties()) {


            @Override
            protected void populateItem(ListItem item) {
                Property<T> property = (Property<T>) item.getModelObject();

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        links.remove(null);


        List<Category> categories = new ArrayList(links.keySet());
        Collections.sort(categories);


        add(new ListView("category", categories){
            public void populateItem(ListItem item){
                Category category = (Category)item.getModelObject();
                item.add(new Label("category.header", new StringResourceModel(category.getNameKey(), (Component) null, null)));
                item.add(new ListView("category.links", links.get(category)){
                    public void populateItem(ListItem item){
                        MenuPageInfo info = (MenuPageInfo)item.getModelObject();
                        BookmarkablePageLink link = new BookmarkablePageLink("link", info.getComponentClass());
                        link.add(new AttributeModifier("title", true, new StringResourceModel(info.getDescriptionKey(), (Component) null, null)));
                        link.add(new Label("link.label", new StringResourceModel(info.getTitleKey(), (Component) null, null)));
                        Image image;
                        if(info.getIcon() != null) {
                            image = new Image("link.icon", new ResourceReference(info.getComponentClass(), info.getIcon()));
                        } else {
                            image = new Image("link.icon", new ResourceReference(GeoServerBasePage.class, "img/icons/silk/wrench.png"));
                        }
                        image.add(new AttributeModifier("alt", true, new ParamResourceModel(info.getTitleKey(), null)));
                        link.add(image);
                        item.add(link);
                    }
                });
            }
        });


        add(new ListView("standalone", standalone){
                    public void populateItem(ListItem item){
                        MenuPageInfo info = (MenuPageInfo)item.getModelObject();
                        BookmarkablePageLink link = new BookmarkablePageLink("link", info.getComponentClass());
                        link.add(new AttributeModifier("title", true, new StringResourceModel(info.getDescriptionKey(), (Component) null, null)));
                        link.add(new Label("link.label", new StringResourceModel(info.getTitleKey(), (Component) null, null)));

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    public FileBreadcrumbs(String id, IModel rootFile, IModel currentFile) {
        super(id, currentFile);


        this.rootFile = rootFile;
        add(new ListView("path", new BreadcrumbModel(rootFile, currentFile)) {


            @Override
            protected void populateItem(ListItem item) {
                File file = (File) item.getModelObject();
                boolean last = item.getIndex() == getList().size() - 1;

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    private abstract class ListLayerEditTabPanel extends LayerEditTabPanel {


        public ListLayerEditTabPanel(String id, IModel model) {
            super(id, model);
            
            ListView list = createList("theList");
            
            // do this or die on validation (the form element contents will
            // reset, the edit will be lost)
            list.setReuseItems(true);
            add(list);
        }

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        }


        protected ListView createList(String id) {
            List dataPanels = filterResourcePanels(((GeoServerApplication) getGeoServerApplication())
                    .getBeansOfType(ResourceConfigurationPanelInfo.class));
            ListView dataPanelList = new ListView(id, dataPanels) {
                @Override
                protected void populateItem(ListItem item) {
                    ResourceConfigurationPanelInfo panelInfo = (ResourceConfigurationPanelInfo) item
                            .getModelObject();
                    try {

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        @Override
        public ListView createList(String id) {
            List pubPanels = filterLayerPanels(((GeoServerApplication) getGeoServerApplication())
                    .getBeansOfType(LayerConfigurationPanelInfo.class));
            ListView pubPanelList = new ListView(id, pubPanels) {
                @Override
                protected void populateItem(ListItem item) {
                    LayerConfigurationPanelInfo panelInfo = (LayerConfigurationPanelInfo) item
                    .getModelObject();
                    try {

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