import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import java.util.*;


public class KalenderTest 
{
    public static void main(String[] args)
    {
        ComboBoxFrame frame = new ComboBoxFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

class ComboBoxFrame extends JFrame
{
    GregorianCalendar d;
    public ComboBoxFrame()
    {
        setTitle("TEST");
        setSize(DEF_WIDTH, DEF_HEIGHT);

        //
        // Rigger YearSpinner
        //
        YearSpinner = new JSpinner();
        YearSpinner.setValue(2007);
        
        //
        // Rigger MonthCombo
        //
        MonthCombo = new JComboBox();
        MonthCombo.setEditable(true);
        MonthCombo.addItem("Januar");
        MonthCombo.addItem("Februar");
        MonthCombo.addItem("Mars");
        MonthCombo.addItem("April");
        MonthCombo.addItem("Mai");
        MonthCombo.addItem("Juni");
        MonthCombo.addItem("Juli");
        MonthCombo.addItem("August");
        MonthCombo.addItem("September");
        MonthCombo.addItem("Oktober");
        MonthCombo.addItem("November");
        MonthCombo.addItem("Desember");
        
        //
        // Rigger Kalender
        //
        d = new GregorianCalendar();
        
        int currentToday = d.get(Calendar.DAY_OF_MONTH);
        int month = d.get(Calendar.MONTH);
        
        d.set(Calendar.DAY_OF_MONTH, 1);    
        int weekday = d.get(Calendar.DAY_OF_WEEK);    
        
        String temp = "";

        temp += "MON  TUE  WED  THU  FRI  SAT  SUN\n";

        for(int i = Calendar.MONDAY; i < weekday; i++)
        {
            temp += "           ";
        }
            
        do
        {
            int day = d.get(Calendar.DAY_OF_MONTH);
            temp += day;
            
            if (day == currentToday)
                temp += "*     ";
            else
                temp += "      ";
            
            if (day >= 1 && day <= 8)
                temp += "   ";
            
            if (weekday == Calendar.SUNDAY)
                temp += "\n";
            
            d.add(Calendar.DAY_OF_MONTH, 1);
            weekday = d.get(Calendar.DAY_OF_WEEK);
        }
        while (d.get(Calendar.MONTH) == month);

        if (weekday != Calendar.SATURDAY)
        {
            temp += "\n";
        }

        //
        // ActionListener på YearSpinner
        //
        YearSpinner.addChangeListener(new ChangeListener() {

            public void stateChanged(ChangeEvent arg0) {            
                d.set(Calendar.YEAR, ((Integer)YearSpinner.getValue()).intValue());
            }
        });
        
        //
        // ActionListener på MonthCombo
        //
        MonthCombo.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent event)
            {
                d.set(Calendar.MONTH, MonthCombo.getSelectedIndex());
            }
        });

        //
        // Adder YearSpinner nord på et panel
        //
        JPanel spinnerPanel = new JPanel();
        spinnerPanel.add(YearSpinner);
        add(spinnerPanel, BorderLayout.NORTH);
        
        //
        // Adder MonthCombo center på et panel
        //
        JPanel comboPanel = new JPanel();
        comboPanel.add(MonthCombo);
        add(comboPanel, BorderLayout.CENTER);
        
        //
        // Adder Kalender south på et panel
        //
        JPanel kalenderPanel = new JPanel();
        JTextArea KalenderGen = new JTextArea(temp);
        kalenderPanel.add(KalenderGen);
        add(kalenderPanel, BorderLayout.SOUTH);
    }

    public static final int DEF_WIDTH = 300;
    public static final int DEF_HEIGHT = 220;
    
    private JSpinner YearSpinner;
    private JComboBox MonthCombo;
}