CascadeDemo.java Source code

Introduction

Here is the source code for CascadeDemo.java

Source

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

public class CascadeDemo extends JFrame implements ActionListener {
    private static ImageIcon EARTH;
    private int m_count;
    private int m_tencount;
    private JButton m_newFrame;
    private JDesktopPane m_desktop;
    private JComboBox m_UIBox;
    private UIManager.LookAndFeelInfo[] m_infos;

    public CascadeDemo() {
        super("CascadeDemo");
        EARTH = new ImageIcon("earth.jpg");
        m_count = m_tencount = 0;

        m_desktop = new JDesktopPane();
        m_desktop.putClientProperty("JDesktopPane.dragMode", "outline");
        m_newFrame = new JButton("New Frame");
        m_newFrame.addActionListener(this);

        m_infos = UIManager.getInstalledLookAndFeels();
        String[] LAFNames = new String[m_infos.length];
        for (int i = 0; i < m_infos.length; i++) {
            LAFNames[i] = m_infos[i].getName();
        }
        m_UIBox = new JComboBox(LAFNames);
        m_UIBox.addActionListener(this);

        JPanel topPanel = new JPanel(true);
        topPanel.add(m_newFrame);
        topPanel.add(new JLabel("Look & Feel:", SwingConstants.RIGHT));
        topPanel.add(m_UIBox);

        getContentPane().setLayout(new BorderLayout());
        getContentPane().add("North", topPanel);
        getContentPane().add("Center", m_desktop);

        setSize(570, 400);
        Dimension dim = getToolkit().getScreenSize();
        setLocation(dim.width / 2 - getWidth() / 2, dim.height / 2 - getHeight() / 2);
        setVisible(true);
        WindowListener l = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        };
        addWindowListener(l);
    }

    public void newFrame() {
        JInternalFrame jif = new JInternalFrame("Frame " + m_count, true, true, true, true);
        jif.setBounds(20 * (m_count % 10) + m_tencount * 80, 20 * (m_count % 10), 200, 200);

        JLabel label = new JLabel(EARTH);
        jif.getContentPane().add(new JScrollPane(label));

        m_desktop.add(jif);
        try {
            jif.setSelected(true);
        } catch (PropertyVetoException pve) {
            System.out.println("Could not select " + jif.getTitle());
        }

        m_count++;
        if (m_count % 10 == 0) {
            if (m_tencount < 3)
                m_tencount++;
            else
                m_tencount = 0;
        }
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == m_newFrame)
            newFrame();
        else if (e.getSource() == m_UIBox) {
            m_UIBox.hidePopup(); // BUG WORKAROUND
            try {
                UIManager.setLookAndFeel(m_infos[m_UIBox.getSelectedIndex()].getClassName());
                SwingUtilities.updateComponentTreeUI(this);
            } catch (Exception ex) {
                System.out.println("Could not load " + m_infos[m_UIBox.getSelectedIndex()].getClassName());
            }
        }
    }

    public static void main(String[] args) {
        new CascadeDemo();
    }
}