changelistener question
hey all
i am having problems by adding a change listener to jtabbed pane...
i cannot figure out where to add the changelistener, should i add it to the class that extends JFrame or to the classes that extends JPanel, i tried both and in both cases i cant find the method addChangeListener();
so when i make for example the class that extends JPanel , implements ChangeListener, i fires an error when i write addChangeListener(this);
the thing that i want to do is that when i change tabs, i want it to call the method resetFields();
the following is part of my source code...
please help...
thanks in advance
import javax.swing.*;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
publicclass GUIextends JFrameimplements ActionListener{
public GUI(){
setDefaultCloseOperation(EXIT_ON_CLOSE);
setTitle("DVD rental center");
setSize(1000, 700);
setLocation(20, 20);
initializeMenuBar();
initializeGUI();
}
publicvoid initializeGUI(){
JTabbedPane tp =new JTabbedPane(JTabbedPane.LEFT);
getContentPane().add(tp);
tp.addTab("New Customer",new NewCustomerGUI());
tp.addTab("New Title",new NewTitleGUI());
}
publicvoid initializeMenuBar(){
JMenuBar menuBar =new JMenuBar();
JMenu fileMenu =new JMenu("File");
JMenuItem exitItem =new JMenuItem("Exit");
exitItem.setActionCommand("exit");
exitItem.addActionListener(this);
fileMenu.add(exitItem);
menuBar.add(fileMenu);
this.setJMenuBar(menuBar);
}
publicstaticvoid main(String[] args){
GUI g =new GUI();
g.setVisible(true);
}
/**
* Invoked when an action occurs.
*/
publicvoid actionPerformed(ActionEvent e){
if (e.getActionCommand().equalsIgnoreCase("exit"))
System.exit(0);
}
}
class NewCustomerGUIextends JPanelimplements ActionListener, GUIConstants{
private JLabel name =new JLabel("Customer Name: ", SwingConstants.LEFT);
private JLabel phone =new JLabel("Phone: ", SwingConstants.LEFT);
private JLabel address =new JLabel("Address: ", SwingConstants.LEFT);
private JLabel note =new JLabel("Note: ", SwingConstants.LEFT);
private JLabel deposit =new JLabel("Deposit: ", SwingConstants.LEFT);
private JTextField nameField =new JTextField(10);
private JTextField phoneField =new JTextField(10);
private JTextArea addressArea =new JTextArea(5, 10);
private JTextArea noteArea =new JTextArea(5, 10);
private JTextField depositField =new JTextField(10);
private JButton createButton =new JButton("Create Customer");
private JButton resetButton =new JButton("reset");
privatefinalint HORIZONTAL_SPACING = 500;
privatefinalint VERTICAL_SPACING = 290;
privatefinalint SMALL_VERICAL_SPACING = 15;
privatefinalint FONT_SIZE = 15;
private Font f =new Font("Times New Roman", Font.BOLD, FONT_SIZE);
private Font borderFont =new Font("Times New Roman", Font.BOLD, FONT_SIZE + 5);
public NewCustomerGUI(){
setupButtons();
setupFonts();
initializeGUI();
}
publicvoid setupButtons(){
createButton.setActionCommand("create");
createButton.addActionListener(this);
resetButton.setActionCommand("reset");
resetButton.addActionListener(this);
}
publicvoid setupFonts(){
name.setFont(f);
phone.setFont(f);
address.setFont(f);
note.setFont(f);
deposit.setFont(f);
nameField.setFont(f);
phoneField.setFont(f);
addressArea.setFont(f);
noteArea.setFont(f);
depositField.setFont(f);
}
publicvoid resetFields(){
nameField.setText("");
phoneField.setText("");
addressArea.setText("");
noteArea.setText("");
depositField.setText("");
}
public Box addComponent(Component c1, Component c2,int spacing){
Box b =new Box(BoxLayout.LINE_AXIS);
b.add(c1);
b.add(c2);
b.add(Box.createHorizontalStrut(spacing));
return b;
}
publicvoid setupComponents(){
Border b = BorderFactory.createLoweredBevelBorder();
this.setBorder(BorderFactory.createTitledBorder(b
,"New Customer"
, TitledBorder.DEFAULT_JUSTIFICATION
, TitledBorder.DEFAULT_POSITION
, borderFont
, Color.blue));
nameField.setBorder(BorderFactory.createLoweredBevelBorder());
phoneField.setBorder(BorderFactory.createLoweredBevelBorder());
addressArea.setBorder(BorderFactory.createLoweredBevelBorder());
noteArea.setBorder(BorderFactory.createLoweredBevelBorder());
depositField.setBorder(BorderFactory.createLoweredBevelBorder());
}
publicvoid setNameField(String name){
nameField.setText(name);
}
publicvoid setPhone(String phone){
phoneField.setText(phone);
}
publicvoid setAddress(String address){
addressArea.setText(address);
}
publicvoid setNote(String note){
noteArea.setText(note);
}
publicvoid setDeposit(String deposit){
depositField.setText(deposit);
}
publicvoid initializeGUI(){
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
setupComponents();
add(addComponent(name, nameField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(phone, phoneField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
JScrollPane sp1 =new JScrollPane(addressArea,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
add(addComponent(address, sp1, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
JScrollPane sp2 =new JScrollPane(noteArea,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
add(addComponent(note, sp2, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(deposit, depositField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(createButton, resetButton, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(VERTICAL_SPACING));
}
/**
* Invoked when an action occurs.
*/
publicvoid actionPerformed(ActionEvent e){
if (e.getActionCommand().equalsIgnoreCase("create")){
}
if (e.getActionCommand().equalsIgnoreCase("reset")){
resetFields();
}
}
}
class NewTitleGUIextends JPanelimplements ActionListener, GUIConstants{
private JLabel title =new JLabel("Title: ", SwingConstants.LEFT);
private JLabel number =new JLabel("Number: ", SwingConstants.LEFT);
private JLabel category =new JLabel("Category: ", SwingConstants.LEFT);
private JLabel actor1 =new JLabel("Actor 1: ", SwingConstants.LEFT);
private JLabel actor2 =new JLabel("Actor 2: ", SwingConstants.LEFT);
private JLabel director =new JLabel("Director: ", SwingConstants.LEFT);
private JLabel newr =new JLabel("New Release: ", SwingConstants.LEFT);
private JLabel cost =new JLabel("Cost($): ", SwingConstants.LEFT);
private JLabel date =new JLabel("Date(DD-MM-YYYY): ", SwingConstants.LEFT);
private JLabel barcode =new JLabel("Barcode: ", SwingConstants.LEFT);
String[] categories ={"Select a category","Thriller"};
private JTextField titleField =new JTextField(20);
private JTextField numberField =new JTextField(10);
private JComboBox categoryBox =new JComboBox(categories);
private JTextField actor1Field =new JTextField(15);
private JTextField actor2Field =new JTextField(15);
private JTextField directorField =new JTextField(15);
private JCheckBox newrField =new JCheckBox("",false);
private JTextField costField =new JTextField(10);
private JTextField dateField =new JTextField(10);
private JTextField barcodeField =new JTextField(10);
private JButton addTitle =new JButton("Add Title");
private JButton reset =new JButton("reset");
privatefinalint HORIZONTAL_SPACING = 500;
privatefinalint VERTICAL_SPACING = 300;
privatefinalint SMALL_VERICAL_SPACING = 15;
privatefinalint FONT_SIZE = 15;
private Font f =new Font("Times New Roman", Font.BOLD, FONT_SIZE);
private Font borderFont =new Font("Times New Roman", Font.BOLD, FONT_SIZE + 5);
public NewTitleGUI(){
setupFonts();
setupButtons();
initializeGUI();
}
publicvoid initializeGUI(){
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
setupComponents();
add(addComponent(title, titleField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(number, numberField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(category, categoryBox, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(actor1, actor1Field, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(actor2, actor2Field, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(director, directorField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(newr, newrField, HORIZONTAL_SPACING + 300));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(cost, costField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(date, dateField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(barcode, barcodeField, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(SMALL_VERICAL_SPACING));
add(addComponent(addTitle, reset, HORIZONTAL_SPACING));
add(Box.createVerticalStrut(VERTICAL_SPACING));
}
publicvoid setupFonts(){
title.setFont(f);
number.setFont(f);
category.setFont(f);
actor1.setFont(f);
actor2.setFont(f);
director.setFont(f);
newr.setFont(f);
cost.setFont(f);
date.setFont(f);
barcode.setFont(f);
titleField.setFont(f);
numberField.setFont(f);
category.setFont(f);
actor1Field.setFont(f);
actor2Field.setFont(f);
directorField.setFont(f);
newrField.setFont(f);
costField.setFont(f);
dateField.setFont(f);
barcodeField.setFont(f);
}
publicvoid setupComponents(){
Border b = BorderFactory.createLoweredBevelBorder();
this.setBorder(BorderFactory.createTitledBorder(b
,"New Title"
, TitledBorder.DEFAULT_JUSTIFICATION
, TitledBorder.DEFAULT_POSITION
, borderFont
, Color.blue));
titleField.setBorder(BorderFactory.createLoweredBevelBorder());
numberField.setBorder(BorderFactory.createLoweredBevelBorder());
categoryBox.setBorder(BorderFactory.createLoweredBevelBorder());
actor1Field.setBorder(BorderFactory.createLoweredBevelBorder());
actor2Field.setBorder(BorderFactory.createLoweredBevelBorder());
directorField.setBorder(BorderFactory.createLoweredBevelBorder());
newrField.setBorder(BorderFactory.createLoweredBevelBorder());
costField.setBorder(BorderFactory.createLoweredBevelBorder());
dateField.setBorder(BorderFactory.createLoweredBevelBorder());
barcodeField.setBorder(BorderFactory.createLoweredBevelBorder());
}
publicvoid setupButtons(){
addTitle.setActionCommand("add");
addTitle.addActionListener(this);
reset.setActionCommand("reset");
reset.addActionListener(this);
}
publicvoid resetFields(){
titleField.setText("");
numberField.setText("");
categoryBox.setSelectedIndex(0);
actor1Field.setText("");
actor2Field.setText("");
directorField.setText("");
newrField.setSelected(false);
costField.setText("");
dateField.setText("");
barcodeField.setText("");
}
public Box addComponent(Component c1, Component c2,int spacing){
Box b =new Box(BoxLayout.LINE_AXIS);
b.add(c1);
b.add(c2);
b.add(Box.createHorizontalStrut(spacing));
return b;
}
publicvoid setTitle(String title){
titleField.setText(title);
}
publicvoid setNumber(String number){
numberField.setText(number);
}
publicvoid setCategory(String name){
categoryBox.setSelectedItem(name);
}
publicvoid setActor1(String name){
actor1Field.setText(name);
}
publicvoid setActor2(String name){
actor2Field.setText(name);
}
publicvoid setDirector(String name){
directorField.setText(name);
}
publicvoid setNewRelease(boolean value){
newrField.setSelected(value);
}
publicvoid setCost(String cost){
costField.setText(cost);
}
publicvoid setDate(String date){
dateField.setText(date);
}
publicvoid setBarcode(String barcode){
barcodeField.setText(barcode);
}
/**
* Invoked when an action occurs.
*/
publicvoid actionPerformed(ActionEvent e){
if (e.getActionCommand().equalsIgnoreCase("add")){
}
if (e.getActionCommand().equalsIgnoreCase("reset")){
resetFields();
}
}
}
publicinterface GUIConstants{
publicvoid setupFonts();
publicvoid setupComponents();
publicvoid initializeGUI();
publicvoid setupButtons();
publicvoid resetFields();
public Box addComponent(Component c1, Component c2,int spacing);
}
