import java.awt.BorderLayout;
import java.awt.GridLayout;

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

public class AddressPrg extends JFrame implements ActionListener
{
    private JButton add = new JButton("Add");
    private JButton del = new JButton("Delete");

    private JTextField name = new JTextField();
    private JTextField email = new JTextField();

    private AddressData data = new AddressData();
    private JTable      table = new JTable(data);

    private JMenuItem   fileNew  = new JMenuItem("New");
    private JMenuItem   fileExit = new JMenuItem("Exit");
    private JCheckBoxMenuItem javaLook = new JCheckBoxMenuItem ("Java Look", true);
    private JCheckBoxMenuItem unixLook = new JCheckBoxMenuItem ("Unix Look");
    private JCheckBoxMenuItem winLook  = new JCheckBoxMenuItem ("Windows Look");

    private class WindowCloser extends WindowAdapter
    {   public void windowClosing(WindowEvent we)
        {   exitPrg();
        }
    }

    public AddressPrg()
    {   super("Address Book");

        JScrollPane tableScroller = new JScrollPane(table);

        JSplitPane splitter = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
        splitter.setTopComponent(tableScroller);
        splitter.setBottomComponent(makePanel());

        getContentPane().setLayout(new BorderLayout());
        getContentPane().add("Center", splitter);

        setJMenuBar(makeMenuBar());

        add.addActionListener(this);
        del.addActionListener(this);
        unixLook.addActionListener(this);
        javaLook.addActionListener(this);
        winLook.addActionListener(this);
        fileExit.addActionListener(this);

        setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        addWindowListener(new WindowCloser());

        fileNew.setEnabled(false);
        splitter.setOneTouchExpandable(true);

        validate();
        pack();
        show();
    }


    private JPanel makePanel()
    {
        JPanel labels = new JPanel(new GridLayout(2, 1));
        labels.add(new JLabel("Name:"));
        labels.add(new JLabel("Email:"));

        JPanel fields = new JPanel(new GridLayout(2, 1));
        fields.add(name);
        fields.add(email);

        JPanel buttons = new JPanel(new GridLayout(2, 1));
        buttons.add(add);
        buttons.add(del);

        JPanel panel = new JPanel(new BorderLayout());
        panel.add("West", labels);
        panel.add("Center", fields);
        panel.add("East", buttons);

        return panel;
    }

    private JMenuBar makeMenuBar()
    {   JMenu file = new JMenu("File");
        file.add(fileNew);
        file.addSeparator();
        file.add(fileExit);

        JMenu options = new JMenu("Options");
        options.add(unixLook);
        options.add(javaLook);
        options.add(winLook);

        ButtonGroup optionsGroup = new ButtonGroup();
        optionsGroup.add(unixLook);
        optionsGroup.add(javaLook);
        optionsGroup.add(winLook);

        JMenuBar bar = new JMenuBar();
        bar.add(file);
        bar.add(options);
        return bar;
    }

    private void exitPrg()
    {
        if (data.isDirty())
        {   int response = JOptionPane.showConfirmDialog(this, "Are you sure you want to exit?");
            if (response == JOptionPane.OK_OPTION)
               System.exit(0);
        }
        else
           System.exit(0);
    }

    private void addAddress()
    {   String name_s = name.getText().trim();
        String email_s = email.getText().trim();
        if ( (!name_s.equals("")) && (!email_s.equals("")))
        {   data.add(new Address(name_s, email_s));
            name.setText("");
            email.setText("");
        }
        else
            JOptionPane.showMessageDialog(this, "You must provide a name and email");
    }

    private void delAddress()
    {   int row = table.getSelectedRow();
        if (row >= 0)
            data.delete(row);
        else
            JOptionPane.showMessageDialog(this, "You must select an address to delete");
    }

    private void changeLookAndFeel(JCheckBoxMenuItem option)
    {   String look = "javax.swing.plaf.metal.MetalLookAndFeel";
        if (option == unixLook)
           look = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
        else if (option == winLook)
           look = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";

        try 
        {   UIManager.setLookAndFeel(look);
            SwingUtilities.updateComponentTreeUI(this);
        }
        catch (Exception e) 
        {   System.err.println("Exception: " + e); 
        }        
    }

    public void actionPerformed(ActionEvent ae)
    {   if (ae.getSource() == add)
            addAddress();
        else if (ae.getSource() == del)
            delAddress();
        else if ((ae.getSource() == unixLook) || (ae.getSource() == javaLook) || (ae.getSource() == winLook))
            changeLookAndFeel((JCheckBoxMenuItem)ae.getSource());
        else if (ae.getSource() == fileExit)
            exitPrg();
    }

    public static void main(String args[])
    {   AddressPrg ap = new AddressPrg();
    }
}