//XXX: Metalworks is the only desktop-using app I looked at.  This follows
//XXX: its lead.  How will these desktop apps usually be arranged?  Really
//XXX: a menu at the top of the main JFrame?

//XXX: You might think of using a JWindow to house the JDesktopPane, but
//XXX: JWindows behave badly.  They *always* stay in front.  And you can't
//XXX: miniaturize them.

import javax.swing.JInternalFrame;
import javax.swing.JDesktopPane;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JFrame;

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

public class InternalFrameDemo extends JFrame {

    JDesktopPane desktop;

    public InternalFrameDemo() {
	super("InternalFrameDemo");

	//Make the big window be indented 50 pixels from each edge 
	//of the screen.
	int inset = 50;
	Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
	setBounds(inset, inset, 
		  screenSize.width - inset*2, 
		  screenSize.height-inset*2);

	//Quit this app when the big window closes.
	addWindowListener(new WindowAdapter() {
//XXX: Notes for Kathy.
//XXX: common problem: windowClosing or other event method ignored.
//XXX: did you add it as a listener?  Did you define the method right,
//XXX: E.g., is it public void, spelled right, and have the right kind
//XXX: of argument (issue for adapter subclasses).
	    public void windowClosing(WindowEvent e) {
		System.exit(0);
	    }
	});

	//Set up the GUI.
	desktop = new JDesktopPane(); //a specialized layered pane
	createFrame(); //Create first window

	setContentPane(desktop);
	setJMenuBar(createMenuBar());
    }

    protected JMenuBar createMenuBar() {
	JMenuBar menuBar = new JMenuBar();

	JMenu menu = new JMenu("Document");
	JMenuItem menuItem = new JMenuItem("New");
	menuItem.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
	        createFrame();
	    }
	});
	menu.add(menuItem);
	menuBar.add(menu);

	return menuBar;
    }

    protected void createFrame() {
	MyInternalFrame frame = new MyInternalFrame();
	desktop.add(frame);
        try {
            frame.setSelected(true);
        } catch (java.beans.PropertyVetoException e2) {}
    }

    public static void main(String[] args) {
	InternalFrameDemo frame = new InternalFrameDemo();
	frame.show();
    }
}