public class Person {
	private String firstName;
	private String lastName;
	private String city;

	public Person() {
	}

	public Person(String firstName, String lastName) {
		this.firstName = firstName;
		this.lastName = lastName;
	}

	public String getCity() {
		return city;
	}

	public String getFirstName() {
		return firstName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setCity(String city) {
		this.city = city;
	}

	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}
}

public class Test {
	private final static String[] CITIES = { "Beijing", "Delhi", "Dhaka", "Karachi", "S\u00e3o Paulo", "Shanghai" };

	private static String getRandomCity() {
		return CITIES[(int) (Math.random() * CITIES.length)];
	}

	private Person person;

	@Command
	public void doRandomCity(@BindingParam("form") Person form) {
		if (form != null) {
			final String old = form.getCity();
			String city;
			do {
				city = getRandomCity();
			} while (city.equals(old));
			form.setCity(city);
		}
	}

	@Command
	@NotifyChange("person")
	public void doReset() {
	}

	@Command
	@NotifyChange("person")
	public void doSave() {
	}

	public Person getPerson() {
		return person;
	}

	@Init
	public void init() {
		person = new Person("John", "Doe");
		person.setCity(getRandomCity());
	}
}

<vlayout viewModel="@id('vm') @init('TestNotify')"
	form="@id('fx') @load(vm.person) @save(vm.person, before='doSave')">
	<hbox widths="5em,16.3em">
		<cell align="right">
			<label value="First Name" />
		</cell>
		<textbox value="@bind(fx.firstName)" hflex="1" />
	</hbox>
	<hbox widths="5em,16.3em">
		<cell align="right">
			<label value="Last Name" />
		</cell>
		<textbox value="@bind(fx.lastName)" hflex="1" />
	</hbox>
	<hbox widths="5em,16.3em">
		<cell align="right">
			<label value="City" />
		</cell>
		<textbox value="@bind(fx.city)" hflex="1" />
	</hbox>
	<hbox widths="7em,7em,7em">
		<button label="Random City"
			onClick="@command('doRandomCity',form=fx)" hflex="1" />
		<button label="Reset" onClick="@command('doReset')"
			disabled="@load(not fxStatus.dirty)" hflex="1" />
		<button label="Save" onClick="@command('doSave')"
			disabled="@load(not fxStatus.dirty)" hflex="1" />
	</hbox>
</vlayout>