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index.zulzul<zk>
<div apply="org.zkoss.bind.BindComposer"
viewModel="@id('vm') @init('pkg$.GroupModelVM')">
<grid model="@load(vm.groupmodel)">
<columns>
<column label="First Name" />
<column label="Last Name" />
</columns>
<template name="model:group">
<group label="@load(each)" />
</template>
<template name="model">
<row>
<label value="@load(each.firstName)" />
<label value="@load(each.lastName)" />
</row>
</template>
</grid>
</div>
</zk>
GroupModelVM.javajavaimport java.util.ArrayList;
import java.util.List;
import java.util.Random;
import org.zkoss.bind.annotation.BindingParam;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.Init;
import org.zkoss.bind.annotation.NotifyChange;
import pkg$.Person;
import pkg$.CustomGroupsModel;
public class GroupModelVM {
private CustomGroupsModel<Person, String, String, Object> groupmodel;
private List<String> head = new ArrayList<String>();
private Random rand = new Random();
@Init
public void init() {
head.add("female");
head.add("male");
groupmodel = new CustomGroupsModel<Person, String, String, Object>(head){
private static final long serialVersionUID = -2716867419910365919L;
@Override
public void loadChildrenFromDB(String groupName, List<Person> data) {
// dummy data for simulation
for (int i = 0; i < 10; i++) {
data.add(new Person(randomName(), randomName(), groupName));
}
// you can load data from DB here
//data.addAll(DAO.findByGroup(groupName)
}
};
for (int i = 0, len = groupmodel.getGroupCount(); i < len; i++) {
groupmodel.removeOpenGroup(i);
}
}
public CustomGroupsModel<Person, String, String, Object> getGroupmodel() {
return groupmodel;
}
private String randomName() {
int len = rand.nextInt(5) + 4;
char[] name = new char[len];
name[0] = (char) (rand.nextInt(26) + 'A');
for (int i = 1; i < len; i++)
name[i] = (char) (rand.nextInt(26) + 'a');
return String.valueOf(name);
}
}
Person.javajavapublic class Person {
private String firstName;
private String lastName;
private String gender;
public Person() {
}
public Person(String firstName, String lastName) {
super();
this.firstName = firstName;
this.lastName = lastName;
}
public Person(String firstName, String lastName, String gender) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.gender = gender;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
}
CustomGroupsModel.javajavaimport java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.zkoss.zul.AbstractGroupsModel;
import org.zkoss.zul.event.GroupsDataEvent;
public abstract class CustomGroupsModel<D, H, F, E> extends AbstractGroupsModel<D, H, F, E> {
private static final long serialVersionUID = 8081414192771886200L;
protected List<List<D>> _data;
private List<H> _head;
private Set<Integer> _open = new HashSet<Integer>();
public CustomGroupsModel(List<H> head) {
_head = head;
_data = new ArrayList<List<D>>();
for (int i = 0, len = head.size(); i < len; i++) {
_data.add(new ArrayList<D>());
}
}
public CustomGroupsModel(List<List<D>> data, List<H> head) {
_data = data;
_head = head;
}
@Override
public H getGroup(int groupIndex) {
return _head.get(groupIndex);
}
@Override
public int getGroupCount() {
return _head.size();
}
@Override
public D getChild(int groupIndex, int index) {
return _data.get(groupIndex).get(index);
}
@Override
public int getChildCount(int groupIndex) {
return _data.get(groupIndex).size();
}
@Override
public F getGroupfoot(int groupIndex) {
return null;
}
@Override
public boolean hasGroupfoot(int groupIndex) {
return false;
}
@Override
public boolean isGroupOpened(int groupIndex) {
return _open.contains(groupIndex);
}
@Override
public boolean addOpenGroup(int groupIndex) {
if (_open.add(groupIndex)) {
List<D> data = _data.get(groupIndex);
if (data.isEmpty()) {
loadChildrenFromDB(_head.get(groupIndex), data);
}
fireEvent(GroupsDataEvent.GROUPS_CHANGED, groupIndex, -1, -1);
return true;
}
return false;
}
@Override
public boolean removeOpenGroup(int groupIndex) {
if (_open.remove(groupIndex)) {
fireEvent(GroupsDataEvent.GROUPS_CHANGED, groupIndex, -1, -1);
return true;
}
return false;
}
public abstract void loadChildrenFromDB(H h, List<D> data);
}