MineAvtaler.java

package mineavtaler;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

/**
 * This is the project's main window. The application entry-point is also placed
 * in this class
 *
 * @author Tomas Sandven
 */
public class MineAvtaler extends JFrame implements ActionListener
{
    private static final long serialVersionUID = -5700357531421820495L;

    /*
     * GUI Components
     */
    private JScrollPane listScroll;
    private JList appointmentList;

    private JPanel buttonColumn;
    private JButton newAppointmentButton;
    private JButton removeAppointmentButton;
    private JButton showAppointmentButton;
    private JButton editAppointmentButton;
    private JButton exitButton;

    /*
     * Other fields
     */
    private Avtaledata listeData;

    // A mouselistener for the double click event on the list
    private MouseListener appointmentListMouseListener;

    /**
     * The application's entry point
     */
    public static void main(String[] args)
    {
        // Try setting windows default look-and-feel
        try
        {
            String laf = UIManager.getSystemLookAndFeelClassName();
            UIManager.setLookAndFeel(laf);
        }
        catch (Exception e)
        {}

        // Create and display the main window
        MineAvtaler window = new MineAvtaler();
        window.setVisible(true);
    }

    /**
     * MineAvtaler constructor. Sets default settings
     */
    public MineAvtaler()
    {
        /*
         * Initialization
         */
        this.listeData = new Avtaledata();
        // Create a new MouseListener (I hate how I have to override every
        // abstract function)
        this.appointmentListMouseListener = new MouseListener()
        {
            public void mouseClicked(MouseEvent e)
            {
                // If doubleclick
                if (e.getClickCount() == 2)
                {
                    // Get the list object and find the index
                    JList list = (JList) e.getSource();
                    int index = list.getSelectedIndex();

                    // If a row is selected...
                    if (index != -1)
                    {
                        // Fetch the ListModel from the JList object, cast it to
                        // the Avtaledata class and fetch the selected Avtale
                        // object - then display it's details
                        ((Avtaledata) list.getModel()).getAvtale(index).displayDetails();
                    }
                }
            }

            public void mouseEntered(MouseEvent e)
            {
            }

            public void mouseExited(MouseEvent e)
            {
            }

            public void mousePressed(MouseEvent e)
            {
            }

            public void mouseReleased(MouseEvent e)
            {
            }
        };

        /*
         * Window GUI settings
         */

        // Set window size
        this.setSize(640, 240);
        this.setMinimumSize(new Dimension(640, 240));
        this.setResizable(false);

        // Appear at default OS window location
        this.setLocationByPlatform(true);

        // Set window title
        this.setTitle("Mine avtaler");

        // Initialize application GUI
        this.initializeComponents();
    }

    /**
     * Actionlistener
     */
    public void actionPerformed(ActionEvent e)
    {
        if (e.getSource().equals(this.newAppointmentButton))
        {
            this.newAppointment();
        }
        if (e.getSource().equals(this.removeAppointmentButton))
        {
            this.removeAppointment();
        }
        if (e.getSource().equals(this.showAppointmentButton))
        {
            this.showAppointment();
        }
        if (e.getSource().equals(this.editAppointmentButton))
        {
            this.editAppointment();
        }
        if (e.getSource().equals(this.exitButton))
        {
            this.exit();
        }
    }

    /**
     * Initialize GUI components
     *
     * GUI creation convention borrowed from C#. Place all GUI instantiation and
     * configuration in one function and call it from the constructor
     */
    public void initializeComponents()
    {
        // Initialize and configure components
        this.setLayout(new BorderLayout());

        this.listScroll = new JScrollPane();

        this.appointmentList = new JList(this.listeData);
        this.appointmentList.addMouseListener(this.appointmentListMouseListener);

        this.buttonColumn = new JPanel();
        this.buttonColumn.setLayout(new GridLayout(5, 1));

        this.newAppointmentButton = new JButton();
        this.newAppointmentButton.setText("Ny avtale");
        this.newAppointmentButton.addActionListener(this);

        this.removeAppointmentButton = new JButton();
        this.removeAppointmentButton.setText("Fjern avtale");
        this.removeAppointmentButton.addActionListener(this);

        this.showAppointmentButton = new JButton();
        this.showAppointmentButton.setText("Vis avtale");
        this.showAppointmentButton.addActionListener(this);

        this.editAppointmentButton = new JButton();
        this.editAppointmentButton.setText("Endre avtale");
        this.editAppointmentButton.addActionListener(this);

        this.exitButton = new JButton();
        this.exitButton.setText("Avslutt");
        this.exitButton.addActionListener(this);

        // Link components
        this.listScroll.setViewportView(this.appointmentList);

        this.buttonColumn.add(newAppointmentButton);
        this.buttonColumn.add(removeAppointmentButton);
        this.buttonColumn.add(showAppointmentButton);
        this.buttonColumn.add(editAppointmentButton);
        this.buttonColumn.add(exitButton);

        this.add(this.listScroll, BorderLayout.CENTER);
        this.add(this.buttonColumn, BorderLayout.LINE_END);
    }

    /**
     * Add a new appointment to the list
     */
    private void newAppointment()
    {
        this.listeData.nyAvtale();
    }

    /**
     * Remove an appointment from the list
     */
    private void removeAppointment()
    {
        // Check if index is -1 (none selected) then delete that Avtale object
        int index = this.appointmentList.getSelectedIndex();
        if (index != -1)
        {
            this.listeData.slettAvtale(index);
        }
        // If none is selected, request one from the user
        else
        {
            Avtale a = this.listeData.getAvtale();

            if(a != null)
            {
                this.listeData.slettAvtale(a);
            }
        }
    }

    /**
     * Show details about an appointment
     */
    private void showAppointment()
    {
        // Check if index is -1 (none selected) then display details
        int index = this.appointmentList.getSelectedIndex();
        if (index != -1)
        {
            this.listeData.getAvtale(index).displayDetails();
        }
        // If none is selected, request one from the user
        else
        {
            Avtale a = this.listeData.getAvtale();

            if(a != null)
            {
                a.displayDetails();
            }
        }
    }

    /**
     * Edit an appointment
     */
    private void editAppointment()
    {
        // Check if index is -1 (none selected) then edit the Avtale object
        int index = this.appointmentList.getSelectedIndex();
        if (index != -1)
        {
            this.listeData.getAvtale(index).editDetails();
        }
        // If none is selected, request one from the user
        else
        {
            Avtale a = this.listeData.getAvtale();

            if(a != null)
            {
                a.editDetails();
            }
        }

        // Refresh the list
        this.appointmentList.updateUI();
    }

    /**
     * Exit the application
     */
    private void exit()
    {
        // Dispose of window resources
        dispose();

        // Exit application
        System.exit(0);
    }
}