MVC Two combo Box – Fill second combo based on first combo selection

Summary
We will see how to fill the second combo box based on first combo box selection using MVC Data binding.

ZK Version : ZK 6

Project Name :ComboBoxTwoMVC

Project Structure

Demo.zul

   1: <?page title="new page title" contentType="text/html;charset=UTF-8"?>

   2: <?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit" ?> 

   3: <zk>

   4:     <window id="myWin" title="new page title" border="normal" apply="mydomainUI.DemoCtrl">

   5:         Department:

   6:         <combobox  id="depart" width="200px" 

   7:             model="@{myWin$DemoCtrl.allDepartments}" selectedItem="@{myWin$DemoCtrl.selected}" >

   8:             <comboitem self="@{each='d'}" label="@{d.departName}"

   9:                 value="@{d.departCode}"    />

  10:         </combobox>

  11:         Users:

  12:         <combobox  id="users" width="200px" 

  13:             model="@{myWin$DemoCtrl.allUsers}">

  14:             <comboitem self="@{each='item'}" label="@{item.userName}"

  15:                 value="@{item.userCode}"    />

  16:         </combobox>

  17:     </window>

  18: </zk>

Department.java

   1: package mydomain;

   2:  

   3: public class Department {

   4:  

   5:     private String departCode;

   6:     private String departName;

   7:     

   8:     public String getDepartCode() {

   9:         return departCode;

  10:     }

  11:     public void setDepartCode(String departCode) {

  12:         this.departCode = departCode;

  13:     }

  14:     public String getDepartName() {

  15:         return departName;

  16:     }

  17:     public void setDepartName(String departName) {

  18:         this.departName = departName;

  19:     }

  20:     

  21: }

users.java

   1: package mydomain;

   2:  

   3: public class users {

   4:  

   5:     private String userCode;

   6:     private String userName;

   7:     private String userPassword;

   8:     private String active;

   9:     private String firstName;

  10:     private String lastName;

  11:     private String homePhone;

  12:     private String mobilePhone;

  13:  

  14:     public String getFirstName() {

  15:         return firstName;

  16:     }

  17:  

  18:     public void setFirstName(String firstName) {

  19:         this.firstName = firstName;

  20:     }

  21:  

  22:     public String getLastName() {

  23:         return lastName;

  24:     }

  25:  

  26:     public void setLastName(String lastName) {

  27:         this.lastName = lastName;

  28:     }

  29:  

  30:     public String getHomePhone() {

  31:         return homePhone;

  32:     }

  33:  

  34:     public void setHomePhone(String homePhone) {

  35:         this.homePhone = homePhone;

  36:     }

  37:  

  38:     public String getMobilePhone() {

  39:         return mobilePhone;

  40:     }

  41:  

  42:     public void setMobilePhone(String mobilePhone) {

  43:         this.mobilePhone = mobilePhone;

  44:     }

  45:  

  46:     public String getUserCode() {

  47:         return userCode;

  48:     }

  49:  

  50:     public void setUserCode(String userCode) {

  51:         this.userCode = userCode;

  52:     }

  53:  

  54:     public String getUserName() {

  55:         return userName;

  56:     }

  57:  

  58:     public void setUserName(String userName) {

  59:         this.userName = userName;

  60:     }

  61:  

  62:     public String getUserPassword() {

  63:         return userPassword;

  64:     }

  65:  

  66:     public void setUserPassword(String userPassword) {

  67:         this.userPassword = userPassword;

  68:     }

  69:  

  70:     public String getActive() {

  71:         return active;

  72:     }

  73:  

  74:     public void setActive(String active) {

  75:         this.active = active;

  76:     }

  77:  

  78: }

DepartmentDAO.java

   1: package domainDAO;

   2: import java.util.ArrayList;

   3: import java.util.List;

   4: import mydomain.Department;

   5:  

   6: public class DepartmentDAO {

   7:     

   8:     public List<Department> getAllDepartments() {

   9:  

  10:         List<Department> allDepartments = new ArrayList<Department>();

  11:  

  12:         Department d1 = new Department();

  13:         d1.setDepartName("Finance");

  14:         d1.setDepartCode("D101");

  15:         allDepartments.add(d1);

  16:  

  17:         d1 = new Department();

  18:         d1.setDepartName("Sales");

  19:         d1.setDepartCode("D102");

  20:         allDepartments.add(d1);

  21:         

  22:         return allDepartments;

  23:     }

  24:  

  25: }

usersDAO.java

   1: package domainDAO;

   2:  

   3: import java.util.ArrayList;

   4: import java.util.List;

   5: import mydomain.users;

   6:  

   7: public class usersDAO {

   8:  

   9:     public List<users> getUsers(String departMentCode) {

  10:  

  11:         if (departMentCode == "D101")

  12:             return getFinanceUsers();

  13:  

  14:         if (departMentCode == "D102")

  15:             return getSalesUsers();

  16:  

  17:         return null;

  18:     }

  19:  

  20:     public List<users> getFinanceUsers() {

  21:  

  22:         List<users> allUsers = new ArrayList<users>();

  23:  

  24:         users u1 = new users();

  25:         u1.setUserName("John");

  26:         u1.setUserCode("User101");

  27:         u1.setUserPassword("xxxxx");

  28:         u1.setFirstName("JohnFirstName");

  29:         u1.setLastName("JohnLastName");

  30:         u1.setHomePhone("1111111111");

  31:         u1.setMobilePhone("222222");

  32:         u1.setActive("Y");

  33:         allUsers.add(u1);

  34:  

  35:         u1 = new users();

  36:         u1.setUserName("Robert");

  37:         u1.setUserCode("User102");

  38:         u1.setUserPassword("xxxxx");

  39:         u1.setActive("Y");

  40:         u1.setFirstName("RobertFirstName");

  41:         u1.setLastName("RobertLastName");

  42:         u1.setHomePhone("53534343");

  43:         u1.setMobilePhone("4534343");

  44:         allUsers.add(u1);

  45:  

  46:         return allUsers;

  47:     }

  48:  

  49:     public List<users> getSalesUsers() {

  50:  

  51:         List<users> allUsers = new ArrayList<users>();

  52:  

  53:         users u1 = new users();

  54:         u1.setUserName("Sean");

  55:         u1.setUserCode("User105");

  56:         u1.setUserPassword("xxxxx");

  57:         u1.setFirstName("SeanFirstName");

  58:         u1.setLastName("SeanLastName");

  59:         u1.setHomePhone("1111111111");

  60:         u1.setMobilePhone("222222");

  61:         u1.setActive("Y");

  62:         allUsers.add(u1);

  63:  

  64:         u1 = new users();

  65:         u1.setUserName("Marry");

  66:         u1.setUserCode("User112");

  67:         u1.setUserPassword("xxxxx");

  68:         u1.setActive("Y");

  69:         u1.setFirstName("MarryFirstName");

  70:         u1.setLastName("MarryLastName");

  71:         u1.setHomePhone("53534343");

  72:         u1.setMobilePhone("4534343");

  73:         allUsers.add(u1);

  74:  

  75:         return allUsers;

  76:     }

  77:  

  78: }

DemoCtrl.java

   1: package mydomainUI;

   2:  

   3: import java.util.ArrayList;

   4: import org.zkoss.zul.Combobox;

   5: import org.zkoss.zul.ListModelList;

   6:  

   7: import java.util.List;

   8:  

   9: import org.zkoss.zk.ui.Component;

  10: import org.zkoss.zk.ui.event.Event;

  11: import org.zkoss.zk.ui.util.GenericForwardComposer;

  12: import org.zkoss.zul.Messagebox;

  13: import domainDAO.DepartmentDAO;

  14: import domainDAO.usersDAO;

  15: import mydomain.Department;

  16: import mydomain.users;

  17:  

  18: @SuppressWarnings({ "rawtypes", "serial" })

  19: public class DemoCtrl extends GenericForwardComposer{

  20:  

  21:     private List<users> allUsers = new ArrayList<users>();

  22:     private Department selectedDepartment ;

  23:     private List<Department> allDepartments = new ArrayList<Department>();

  24:     private Combobox users;

  25:  

  26:     public List<users> getAllUsers() {

  27:         return allUsers;

  28:     }

  29:  

  30:     public void setAllUsers(List<users> allUsers) {

  31:         this.allUsers = allUsers;

  32:     }

  33:  

  34:     public List<Department> getAllDepartments() {

  35:         return allDepartments;

  36:     }

  37:  

  38:     

  39:     public void setAllDepartments(List<Department> allDepartments) {

  40:         this.allDepartments = allDepartments;

  41:     }

  42:  

  43:  

  44:     public Department getSelected() {

  45:         return selectedDepartment;

  46:     }

  47:  

  48:     public void setSelected(Department selectedDepartment) {

  49:         this.selectedDepartment = selectedDepartment;

  50:     }

  51:  

  52:     @SuppressWarnings("unchecked")

  53:     public void doAfterCompose(Component comp) throws Exception {

  54:         super.doAfterCompose(comp);

  55:         // Load the department first

  56:         allDepartments = new DepartmentDAO().getAllDepartments();

  57:     }

  58:     

  59:     public void onSelect$depart(Event evt)

  60:     {

  61:         allUsers = new usersDAO().getUsers(selectedDepartment.getDepartCode());

  62:         users.setModel(new ListModelList(allUsers));

  63:     }

  64:  

  65:  

  66: }

Now run the demo.zul file . Here is the output.