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

import javax.swing.JOptionPane;

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

public class Framework extends WindowAdapter {
    public int numWindows = 0;
    private Point lastLocation = null;
    private int maxX = 500;
    private int maxY = 500;

    public Framework() {
	Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
	maxX = screenSize.width - 50; 
	maxY = screenSize.height - 50; 
        makeNewWindow();
    } 

    public void makeNewWindow() {
	JFrame frame = new MyFrame(this);
	numWindows++;
	System.out.println("Number of windows: " + numWindows);

	if (lastLocation != null) {
	    //Move the window over and down 40 pixels.
	    lastLocation.translate(40, 40);
	    if ((lastLocation.x > maxX) || (lastLocation.y > maxY)) {
		lastLocation.setLocation(0, 0);
	    }
	    frame.setLocation(lastLocation);
	} else {
	    lastLocation = frame.getLocation();
	}

	System.out.println("Frame location: " + lastLocation);
	frame.setVisible(true);
    }

    //This method must be evoked from the event-dispatching thread.
    public void quit(JFrame frame) {
	if (quitConfirmed(frame)) {
	    System.out.println("Quitting.");
	    System.exit(0);
	}
	System.out.println("Quit operation not confirmed; staying alive.");
    }

    private boolean quitConfirmed(JFrame frame) {
	String s1 = "Quit";
	String s2 = "Cancel";
	Object[] options = {s1, s2};
	int n = JOptionPane.showOptionDialog(frame,
		"Windows are still open.\nDo you really want to quit?",
		"Quit Confirmation",
		JOptionPane.YES_NO_OPTION,
		JOptionPane.QUESTION_MESSAGE,
		null,
		options,
		s1);
	if (n == JOptionPane.YES_OPTION) {
	    return true;
	} else {
	    return false;
	}
    }

    public void windowClosed(WindowEvent e) {
	numWindows--;
	System.out.println("Number of windows = " + numWindows);
	if (numWindows <= 0) {
	    System.out.println("All windows gone.  Bye bye!");
	    System.exit(0);
	}
    }

    public static void main(String[] args) {
	Framework framework = new Framework();
    }
}

class MyFrame extends JFrame {
    protected Dimension defaultSize = new Dimension(200, 200);
    protected Framework framework = null;

    public MyFrame(Framework controller) {
        super("New Frame");
	framework = controller;
	setDefaultCloseOperation(DISPOSE_ON_CLOSE);
	addWindowListener(framework);

	JMenu menu = new JMenu("Window");
	JMenuItem item = null;
	//close
	item = new JMenuItem("Close");
	item.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
		System.out.println("Close window");
		MyFrame.this.setVisible(false);
		MyFrame.this.dispose();
	    }
	});
	menu.add(item);
	//PENDING: in menu page, should have a figure that shows
	//a menu bar, menu, menu item, popup menu -- all with callouts.

	//new
	item = new JMenuItem("New");
	item.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
		System.out.println("New window");
		framework.makeNewWindow();
	    }
	});
	menu.add(item);

	//quit
	item = new JMenuItem("Quit");
	item.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
		System.out.println("Quit request");
		framework.quit(MyFrame.this);
	    }
	});
	menu.add(item);

	JMenuBar menuBar = new JMenuBar();
	menuBar.add(menu);
	setJMenuBar(menuBar);

	setSize(defaultSize);
    }
}