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index.zulzul<zk>
<style>#zk_err{
display: none !important;
}</style>
<div apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init('pkg$.TestVM')">
<chosenbox model="@load(vm.parentModel)" sclass="parent" selectedObjects="@bind(vm.selectedParents)" width="300px" />
<chosenbox model="@load(vm.childModel)" />
<separator />
<button label="show selected" onClick="@command('show')" />
</div>
</zk>TestVM.javajavaimport java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.zkoss.bind.BindUtils;
import org.zkoss.bind.annotation.*;
import org.zkoss.zk.ui.util.Clients;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.ListModelList;
/**
*
* @author chillworld
*/
public class TestVM {
private final Map<Parent, List<Child>> map = new HashMap<Parent, List<Child>>();
private final ListModelList<Parent> parentModel = new ListModelList<Parent>();
private final ListModelList<Child> childModel = new ListModelList<Child>();
private Set<Parent> selectedParents = new HashSet<Parent>();
private Set<Child> selectedChilds = new HashSet<Child>();
@Init
public void init() {
for (int counter = 0; counter < 10; counter++) {
Parent p = new Parent("parent " + counter);
List<Child> childs = new ArrayList<Child>();
for (int counter2 = 0; counter2 < 20; counter2++) {
childs.add(new Child(p, "child " + counter + "-" + counter2));
}
map.put(p, childs);
parentModel.add(p);
childModel.addAll(childs);
}
}
public ListModel<Parent> getParentModel() {
return parentModel;
}
public ListModel<Child> getChildModel() {
return childModel;
}
public Set<Parent> getSelectedParents() {
return selectedParents;
}
public void setSelectedParents(Set<Parent> parents) {
Set<Parent> difference;
if (parents.isEmpty() && !selectedParents.isEmpty()) {
System.out.println("fillFullChildModel.");
fillFullChildModel();
} else if (!parents.isEmpty()) {
if (selectedParents.isEmpty()) {
System.out.println("clearing childmodel");
childModel.clear();
} else {
difference = new HashSet<Parent>(selectedParents);
difference.removeAll(parents);
System.out.println("removing parents : " + difference);
for (Parent p : difference) {
System.out.println("Childs : " + map.get(p));
childModel.removeAll(map.get(p));
Set<Child> selected = new HashSet<Child>();
for (Child child : selectedChilds) {
if (child.getParent().equals(p)) {
selected.add(child);
}
}
selectedChilds.removeAll(selected);
}
}
difference = new HashSet<Parent>(parents);
System.out.println("adding parents : " + difference);
difference.removeAll(selectedParents);
for (Parent p : difference) {
System.out.println("Childs : " + map.get(p));
childModel.addAll(map.get(p));
}
}
childModel.clearSelection();
childModel.setSelection(selectedChilds);
this.selectedParents = parents;
}
public Set<Child> getSelectedChilds() {
return selectedChilds;
}
public void setSelectedChilds(Set<Child> childs) {
if (selectedParents.isEmpty() && !childs.isEmpty()) {
Parent p = childs.iterator().next().getParent(); // normally contains 1, otherwise parentsModel isn't empty
selectedParents.add(p);
BindUtils.postNotifyChange(null, null, this, "selectedParents");
}
this.selectedChilds = childs;
}
private void fillFullChildModel() {
childModel.clear();
childModel.clearSelection();
for (Entry<Parent, List<Child>> entry : map.entrySet()) {
childModel.addAll(entry.getValue());
}
}
@Command
public void show() {
Clients.showNotification("Selected Parents now : " + selectedParents + " \nSelected Childs now : " + selectedChilds);
}
}Parent.javajavapublic class Parent {
private String name;
public Parent(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return name;
}
@Override
public int hashCode() {
int hash = 3;
hash = 37 * hash + (name==null?0:name.hashCode());
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Parent other = (Parent) obj;
return equals(this.name, other.name);
}
private static boolean equals(Object a, Object b) {
return a == b || (a != null && a.equals(b));
}
}Child.javajavapublic class Child {
private Parent parent;
private String name;
public Child(Parent parent, String name) {
this.parent = parent;
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Parent getParent() {
return parent;
}
public void setParent(Parent parent) {
this.parent = parent;
}
@Override
public String toString() {
return name;
}
@Override
public int hashCode() {
int hash = 3;
hash = 67 * hash + (this.parent==null?0:this.parent.hashCode());
hash = 67 * hash + (name==null?0:name.hashCode());
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Child other = (Child) obj;
if (!equals(this.name, other.name)) {
return false;
}
return equals(this.parent, other.parent);
}
private static boolean equals(Object a, Object b) {
return a == b || (a != null && a.equals(b));
}
}