Listbox/listheader autosort onLoad?

public class SortedListModelConverter extends ListModelConverter {
	private static final long serialVersionUID = 1L;

	@Override
	public Object coerceToUi(Object val, Component comp) {
		Object bean = super.coerceToUi(val, comp);
		
		if (bean instanceof ListModelList && comp instanceof Listbox) {
			Listbox listbox = (Listbox) comp;
			ListModelList model = (ListModelList) bean;
			
			for (Object child : listbox.getListhead().getChildren()) {
				final Listheader hd = (Listheader)child;
				if ("natural".equals(hd.getSortDirection())) {
					continue;
				} else if ("ascending".equals(hd.getSortDirection())) {
					model.sort(hd.getSortAscending(), true);
				} else if ("descending".equals(hd.getSortDirection())) {
					model.sort(hd.getSortDescending(), true);
				}
			}
		}
		
		return bean;
	}
}

<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<zk>
<label multiline="true">
	<attribute name="value">
		Demo how to auto sort when user add data to model
	</attribute>
</label>
<zscript><![CDATA[
 import org.zkoss.zk.ui.*;
 import org.zkoss.zk.ui.util.*;
 class Person {
	 String _name;
	 public Person(String name) {
		 _name = name;
	 }
	 public String getName() {
		 return _name;
	 }
 } 

 class MyComposer extends GenericForwardComposer{
	 Listbox lb;
	 Textbox input;
	 AnnotateDataBinder binder;
	 List list = new ArrayList();
	 
	 
	 public void doAfterCompose(Component comp) throws Exception {
		 super.doAfterCompose(comp);
		 
		list = new ArrayList();
		list.add(new Person("Jim"));
		list.add(new Person("Apple"));
		list.add(new Person("Soga"));
		list.add(new Person("Bobo"));
		 
		 //bind all components inside "comp"
		 binder = new AnnotateDataBinder(comp);
		 binder.bindBean("persons", list);
		 binder.loadAll();
	 }
	 
	 public void onClick$btn(Event evt) {
		 String name = input.getValue();
		 if (!"".equals(name)) {
			 list.add(new Person(name));
			 Collections.sort(list, new Comparator() {
				 public int compare(Object o1, Object o2) {
					 Person p1 = (Person)o1;
					 Person p2 = (Person)o2;
					 return p1.getName().compareTo(p2.getName());
				 }
			 });
			 binder.loadAll();
		 }
	 }
 }
]]></zscript>
<window title="new page title" border="normal" apply="MyComposer">
	<listbox id="lb" model="@{persons}" height="200px">
		<listitem self="@{each=entry}">
			<listcell label="@{entry.name}"></listcell>
		</listitem>
	</listbox>
	<textbox id="input"></textbox><button id="btn" label="Add Name"></button>
</window>
</zk>

<window title="new page title" border="normal" apply="MyComposer">
	<listbox id="lb" model="@{persons, converter='matze.SortedListModelConverter', load-after='btn.onclick'"," height="200px">
		<listhead sizable="true">
			<listheader label="Name" sort="auto(name)" />
		</listhead>
		<listitem self="@{each=entry}">
			<listcell label="@{entry.name}"></listcell>
		</listitem>
	</listbox>
	<textbox id="input"></textbox><button id="btn" label="Add Name"></button>
</window>

class MyComposer extends GenericForwardComposer{
	 Textbox input;
	 AnnotateDataBinder binder;
	 List list = new ArrayList();
	 
	 
	 public void doAfterCompose(Component comp) throws Exception {
		 super.doAfterCompose(comp);
		 
		list = new ArrayList();
		list.add(new Person("Jim"));
		list.add(new Person("Apple"));
		list.add(new Person("Soga"));
		list.add(new Person("Bobo"));
		 
		 //bind all components inside "comp"
		 binder = new AnnotateDataBinder(comp);
		 binder.bindBean("persons", list);
		 binder.loadAll();
	 }
	 
	 public void onClick$btn(Event evt) {
		 String name = input.getValue();
		 if (!"".equals(name)) {
			 list.add(new Person(name));
		 }
	 }
 }