package Chapter10;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.util.*;

public class CalendarApp extends JApplet {
 // Create a CalendarPanel for showing calendars
 private CalendarPanel calendarPanel = new CalendarPanel();

 // Combo box for selecting available locales
 private JComboBox jcboLocale = new JComboBox();

 // Declare locales to store available locales
 private Locale locales[] = Calendar.getAvailableLocales();

 // Buttons Prior and Next to displaying prior and next month
 private JButton jbtPrior = new JButton("Prior");
 private JButton jbtNext = new JButton("Next");

 /** Initialize the applet */
 public void init() {
 // Panel jpLocale to hold the combo box for selecting locales
 JPanel jpLocale = new JPanel();
 jpLocale.setBorder(new TitledBorder("Choose a locale"));
 jpLocale.setLayout(new FlowLayout());
 jpLocale.add(jcboLocale);

 // Initialize the combo box to add locale names
 for (int i = 0; i < locales.length; i++)
 jcboLocale.addItem(locales[i].getDisplayName());

 // Panel jpButtons to hold buttons
 JPanel jpButtons = new JPanel();
 jpButtons.setLayout(new FlowLayout());
 jpButtons.add(jbtPrior);
 jpButtons.add(jbtNext);

 // Panel jpCalendar to hold calendarPanel and buttons
 JPanel jpCalendar = new JPanel();
 jpCalendar.setLayout(new BorderLayout());
 jpCalendar.add(calendarPanel, BorderLayout.CENTER);
 jpCalendar.add(jpButtons, BorderLayout.SOUTH);

 // Place jpCalendar and jpLocale to the applet
 add(jpCalendar, BorderLayout.CENTER);
 add(jpLocale, BorderLayout.SOUTH);

 // Register listeners
 jcboLocale.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 if (e.getSource() == jcboLocale)
 calendarPanel.changeLocale(
 locales[jcboLocale.getSelectedIndex()]);
 }
 });

 jbtPrior.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 int currentMonth = calendarPanel.getMonth();
 if (currentMonth == 1) {
 calendarPanel.setMonth(12);
 calendarPanel.setYear(calendarPanel.getYear() - 1);
 }
 else
 calendarPanel.setMonth(currentMonth - 1);
 }
 });

 jbtNext.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 int currentMonth = calendarPanel.getMonth();
 if (currentMonth == 12) {
 calendarPanel.setMonth(1);
 calendarPanel.setYear(calendarPanel.getYear() + 1);
 }
 else
 calendarPanel.setMonth(currentMonth + 1);
 }
 });

 calendarPanel.changeLocale(
 locales[jcboLocale.getSelectedIndex()]);
 }

 /** Main method */
 public static void main(String[] args) {
 // Create a frame
 JFrame frame = new JFrame("CalendarApp");

 // Create an instance of the applet
 CalendarApp applet = new CalendarApp();

 // Add the applet instance to the frame
 frame.getContentPane().add(applet, BorderLayout.CENTER);

 // Invoke init() and start()
 applet.init();
 applet.start();

 // Display the frame
 frame.pack();
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setVisible(true);
 }
}