CIS 260 TestDesktop.java

Code

/*
    TestDesktop.java
    CIS 260
    2/22/2006
    David Klick

    Demonstration of a JDesktopPane used to hold multiple
    JInternalFrames (similar to an MDI application in Windows).
    The use of a JMenuBar is also demonstrated.   
*/

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

public class TestDesktop extends JFrame {
    Container c;
    JDesktopPane desktop;
    static int count = 0;

    public static void main(String[] args) {
       TestDesktop app = new TestDesktop("Internal Frame Test");
    }

    public TestDesktop() { this(""); }

    public TestDesktop(String title) {
        super(title);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        c = getContentPane();
        c.setLayout(new BorderLayout());
        JMenuBar mbar = new JMenuBar();
        mbar.setBorder(new BevelBorder(BevelBorder.RAISED));

        JMenu mnuFile = new JMenu("File");
        mnuFile.setMnemonic('F');
        mbar.add(mnuFile);
        JMenuItem mnuItemNew = new JMenuItem("New");
        mnuItemNew.setMnemonic('N');
        mnuItemNew.addActionListener(new MyMenuListener());
        mnuFile.add(mnuItemNew);
        setJMenuBar(mbar);

        desktop = new JDesktopPane();
        c.add(desktop, BorderLayout.CENTER);
        setSize(400, 400);
        setVisible(true);
    }

    class MyMenuListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            JInternalFrame iframe = new JInternalFrame(
                "Frame #" + (count+1), true, true, true, true);
            iframe.setSize(200, 100);
            iframe.setLocation(10*count, 10*count);
            iframe.setVisible(true);
            desktop.add(iframe);
            count++;
            System.out.println("Frame count: " + count);
            iframe.addInternalFrameListener(new InternalFrameAdapter() {
                public void internalFrameClosing(InternalFrameEvent e2) {
                    count--;
                    System.out.println("Frame count: " + count);
                }
            });
            try {
                iframe.setSelected(true);
            } catch (Exception e3) {
                e3.printStackTrace();
            }
        }
    }
}