<window id="mainWindow" apply="org.zkoss.bind.BindComposer"
	viewModel="@id('vm') @init('test.MyVM')" height="100%" width="100%">
	<div children="@load(vm.items)" xmlns:n="native" xmlns:h="xhtml">
  		<template name="children">
		<div>${each}</div>
			<n:div><h:button onClick="@command('selected',item=each)">test</h:button></n:div>
		</template>
	</div>
</window>

package test;

import org.zkoss.bind.annotation.BindingParam;
import org.zkoss.bind.annotation.Command;
import org.zkoss.zk.ui.util.Clients;

public class MyVM {
	private String[] items = {"Demo", "Edit", "Add"};
	
	public void setItems(String[] items) {
		this.items = items;
	}
	public String[] getItems() {
		return this.items;
	}
	
	@Command
	public void selected(@BindingParam("item") String selected) {
		Clients.log("Selected: " + selected);
	}
}