ZK - Open Source Ajax Java Framework

<zk>
	<window apply="ctrl.MyComposer">
		<tree id="tree" width="300px" height="500px">
			<treecols>
				<treecol width="150px" label="Name"/>
				<treecol width="120px" label="Email" />
				<treecol width="120px" label="AccountId" />
			</treecols>
		</tree>
		<button id="addBtn" label="add"/>
	</window>
</zk>

package ctrl;

import java.util.*;

import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zul.*;
import org.zkoss.zul.event.TreeDataEvent;
import org.zkoss.zul.event.TreeDataListener;

public class MyComposer extends GenericForwardComposer{	
	
	private Tree tree;
	private MySimpleTreeModel treeModel;
	private SimpleTreeNode rdDep, salesDep; 
	
	@Override
	public void doAfterCompose(Component comp) throws Exception {
		super.doAfterCompose(comp);		
		
		//create a PersonTreeitemRenderer
		tree.setTreeitemRenderer(new TreeitemRenderer() {			
			@Override
			public void render(Treeitem item, Object data) throws Exception {
				if (data == null) return;
				
				SimpleTreeNode t = (SimpleTreeNode)data;
				final Person person = (Person)t.getData();
				Treerow tr = new Treerow();
				tr.setParent(item);
				tr.appendChild(new Treecell(person.getName()));
				tr.appendChild(new Treecell(person.getEmail()));
				tr.appendChild(new Treecell(person.getAccountId()));
				item.setOpen(person.isOpen()); 

				item.addEventListener("onOpen", new EventListener() { 
					public void onEvent(Event event) throws Exception {
						Treeitem item = (Treeitem) event.getTarget();
						person.setOpen(item.isOpen()); 
					} 
				}); 
			}
		});		
		
		//create treemodel and assign root
		treeModel = new MySimpleTreeModel(createTreeData());
		tree.setModel(treeModel);		
	}
	
	public void onClick$addBtn(){
		Person person = new Person("NewName", "@zkoss.org","767676"); 
		SimpleTreeNode stn = new SimpleTreeNode(person, new ArrayList<SimpleTreeNode>());		
		treeModel.add(rdDep, stn);
	}	
	
	private SimpleTreeNode createTreeData() {
		//Create nodes for department R and D
		String[] name = {"Pierre","Adam","Thomas"};
		String[] accountId = {"p001","a002","t003"};		
		//Create branch department R and D and assigned children to it. rdDep's children are contained in ArrayList alc.
		rdDep = new SimpleTreeNode(new Person("R&D","",""), createTreeChildren(name, accountId));
		
		//Create nodes for department sales
		String[] name2 = {"Paul","Eric","Gray"};
		String[] accountId2 = {"p002","e009","g019"};		
		//Create branch department sales and assigned children to it
		salesDep = new SimpleTreeNode(new Person("Sales","",""), createTreeChildren(name2, accountId2));
		
		//create root and assigned children to it 
		ArrayList<SimpleTreeNode> al = new ArrayList<SimpleTreeNode>();
		al.add(salesDep);
		al.add(rdDep);		
		return new SimpleTreeNode("ROOT",al);
	}

	private List<SimpleTreeNode> createTreeChildren(String[] name, String[] accountId) {
		ArrayList<SimpleTreeNode> alc = new ArrayList<SimpleTreeNode>();
		for(int i =0; i < name.length; i++){
			Person person = new Person(name<i >,name<i > + "@zkoss.org",accountId<i >);
			SimpleTreeNode stn = new SimpleTreeNode(person,new ArrayList<SimpleTreeNode>());
			alc.add(stn);
		}
		return alc;
	}

	private class MySimpleTreeModel extends SimpleTreeModel{
		
		public MySimpleTreeModel(SimpleTreeNode root) {
			super(root);
		}

		public void add(SimpleTreeNode parent, SimpleTreeNode newNodes){
			
			List<SimpleTreeNode> children = parent.getChildren();
			int length = children.size();
			children.add(newNodes);
			fireEvent(parent, length, length, TreeDataEvent.INTERVAL_ADDED);
		}
	}
	
	private class Person {
		
		private String _name;			
		private String _email;			
		private String _accountId;
		private boolean _open;
		
		public Person(String name, String email, String dep) {
			super();
			_name = name;
			_email = email;
			_accountId = dep;
		}
	
		public String getAccountId() {
			return _accountId;
		}
	
		public String getEmail() {
			return _email;
		}	
	
		public String getName() {
			return _name;
		}
		
		public boolean isOpen() { 
			return _open; 
		} 

		public void setOpen(boolean open) { 
			_open = open; 
		}
	}

}