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

/*
 * The main work of the application is done in this JPanel-extending class.
 * This allows the java class to be run as a stand-alone application or
 * as an applet within a web browser.
 */
class RetirementCalculatorPanel extends JPanel implements ActionListener
{
    private RetirementCalculatorModel myModel;

    protected JComponent makeDivider() { return new JLabel(" "); }

    public RetirementCalculatorPanel()
    {
        super(new BorderLayout());
        JPanel inner = new JPanel(new GridBagLayout());
//        inner.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
        class ComboChoice
        {
            private String myDesc;
            private int myVal;
            ComboChoice(int val, String desc)
            {
                myDesc = desc;
                myVal = val;
            }
            public String toString() { return myDesc; }
            public int getVal() { return myVal; }
        }
        JComponent field;
        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;
        c.ipadx = 2;
        c.gridwidth = 1;
        c.gridheight = 1;
        c.gridx = 0;
        c.gridy = 0;

        c.weightx = 0.0;
        inner.add(new JLabel("How much annual income will you want in retirement?", SwingConstants.RIGHT), c);
        c.gridx++;
        c.weightx = 1.0;
        field = new JTextField();
        field.setMinimumSize(new Dimension(1, 1));
        inner.add(field, c);
        c.gridx--;
        c.gridy++;

        c.weightx = 0.0;
        inner.add(new JLabel("What is your current annual income?", SwingConstants.RIGHT), c);
        c.gridx++;
        c.weightx = 1.0;
        field = new JTextField();
        inner.add(field, c);
        c.gridx--;
        c.gridy++;

        c.gridwidth = 2;
        inner.add(makeDivider(), c);
        c.gridy++;
        inner.add(new JLabel("What is your expected annual income after retirement -"), c);
        c.gridwidth = 1;
        c.gridy++;

        c.weightx = 0.0;
        inner.add(new JLabel(" - from an employer pension plan?", SwingConstants.RIGHT), c);
        c.gridx++;
        c.weightx = 1.0;
        field = new JTextField();
        inner.add(field, c);
        c.gridx--;
        c.gridy++;

        c.weightx = 0.0;
        inner.add(new JLabel(" - from a part-time job?", SwingConstants.RIGHT), c);
        c.gridx++;
        c.weightx = 1.0;
        field = new JTextField();
        inner.add(field, c);
        c.gridx--;
        c.gridy++;

        c.weightx = 0.0;
        inner.add(new JLabel(" - other?", SwingConstants.RIGHT), c);
        c.gridx++;
        c.weightx = 1.0;
        field = new JTextField();
        inner.add(field, c);
        c.gridx--;
        c.gridy++;

        c.gridwidth = 2;
        inner.add(makeDivider(), c);
        c.gridwidth = 1;
        c.gridy++;

        c.weightx = 0.0;
        inner.add(new JLabel("At what age do you expect to retire?", SwingConstants.RIGHT), c);
        c.gridx++;
        c.weightx = 1.0;
        ComboChoice[] retirement_age_choices = {
            new ComboChoice(55, "55"),
            new ComboChoice(60, "60"),
            new ComboChoice(65, "65"),
            new ComboChoice(70, "70")
        };
        field = new JComboBox(retirement_age_choices);
        inner.add(field, c);
        c.gridx--;
        c.gridy++;

        JPanel p = new JPanel(new BorderLayout());
        p.setAlignmentX(Component.RIGHT_ALIGNMENT);
        p.add(new JLabel("What is your life expectancy?", SwingConstants.RIGHT), BorderLayout.CENTER);
        ComboChoice[] life_expectancy_choices = {
            new ComboChoice(82, "82 (Male; 50th percentile)"),
            new ComboChoice(86, "86 (Female; 50th percentile)"),
            new ComboChoice(89, "89 (Male; 75th percentile)"),
            new ComboChoice(92, "92 (Female; 75th percentile)"),
            new ComboChoice(94, "94 (Male; 90th percentile)"),
            new ComboChoice(97, "97 (Female; 90th percentile)")
        };
        field = new JComboBox(life_expectancy_choices);
        p.add(field, BorderLayout.EAST);
        c.gridwidth = 2;
        inner.add(p, c);
        c.gridwidth = 1;
        c.gridy++;

        JScrollPane scrollpane = new JScrollPane(inner,
                ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        add(scrollpane);
    }

    public void actionPerformed(ActionEvent e)
    {
        System.out.println("Event:");
        System.out.println(e.getActionCommand());
        System.out.println(e.paramString());
    }
}

/*
 * The "main" class of this file allows the app to be run as an applet
 * but also provides a "main" method to run as an application.
 */
public class RetirementCalculator extends JApplet
{
    final static private String PROG_NAME = "Josh's Retirement Calculator";

    RetirementCalculatorPanel panel;

    public void init()
    {
        setLayout(new BorderLayout());
        panel = new RetirementCalculatorPanel();
        add(panel, BorderLayout.CENTER);
    }

    public static void main(String[] args)
    {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run()
            {
                JFrame frame = new JFrame(PROG_NAME);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                RetirementCalculatorPanel panel =
                    new RetirementCalculatorPanel();
                frame.getContentPane().add(panel);

                frame.setPreferredSize(new Dimension(600, 450));

                frame.pack();
                frame.setVisible(true);
            }
        });
    }
}