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index.zulzul<zk>
<div apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init('pkg$.FormDirtyViewModel')">
<div form="@id('fx') @load(vm.person) @save(vm.person, before='save')">
<vlayout>
<hlayout>name <textbox value="@bind(fx.name)"/></hlayout>
<hlayout>age <intbox value="@bind(fx.age)"/></hlayout>
<hlayout>email ("")<textbox value="@bind(fx.email)"/></hlayout>
<hlayout>email2 (null)<textbox value="@bind(fx.email2)"/></hlayout>
<hlayout>fxStatus.dirty = <label value="@load(fxStatus.dirty)"/></hlayout>
<button label="save" onClick="@command('save')"/>
<hlayout>intial: <label value="@init(vm.person, after='save')"/></hlayout>
<hlayout>after save: <label value="@load(vm.person, after='save')"/></hlayout>
</vlayout>
</div>
</div>
</zk>FormDirtyViewModel.javajavaimport org.zkoss.bind.Binder;
import org.zkoss.bind.FormStatus;
import org.zkoss.bind.PropertyChangeEvent;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.ContextParam;
import org.zkoss.bind.annotation.ContextType;
import org.zkoss.bind.annotation.Init;
import org.zkoss.bind.annotation.NotifyChange;
import org.zkoss.bind.sys.BinderCtrl;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.event.EventQueue;
import org.zkoss.zk.ui.event.EventQueues;
import org.zkoss.zk.ui.util.Clients;
public class FormDirtyViewModel {
private Person person;
@Init
public void init(@ContextParam(ContextType.BINDER) Binder binder) {
person = new Person();
EventQueue<Event> queue = EventQueues.lookup(BinderCtrl.DEFAULT_QUEUE_NAME, BinderCtrl.DEFAULT_QUEUE_SCOPE, false);
queue.subscribe(new EventListener<Event>() {
@Override
public void onEvent(Event event) throws Exception {
if(event instanceof PropertyChangeEvent) {
PropertyChangeEvent pe = (PropertyChangeEvent)event;
if(pe.getBase() instanceof FormStatus) {
FormStatus fs = (FormStatus)pe.getBase();
boolean dirty = fs.isDirty();
System.out.println(dirty);
//or do whatever with the information here
Clients.showNotification("dirty in listener: " + dirty);
}
}
}
});
}
@Command
@NotifyChange("*")
public void save() {
Clients.showNotification("saved values: " + person);
System.out.println("saved");
}
public Person getPerson() {
return person;
}
public class Person {
private String name = "Guenther";
private Integer age = 20;
private String email = "";
private String email2 = null;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getEmail2() {
return email2;
}
public void setEmail2(String email2) {
this.email2 = email2;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Person [name=");
builder.append(name);
builder.append(", age=");
builder.append(age);
builder.append(", email=");
builder.append(email);
builder.append(", email2=");
builder.append(email2);
builder.append("]");
return builder.toString();
}
}
}