Name: mc57594 Date: 01/10/97

When modal dialog is opened from another modal dialog it is
impossible to
close the first one later and the application gets into the deadlock.
Source code follows:

// Example - Two Dialogs open

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


// Main frame
public class DialogTest extends Frame implements ActionListener {

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

    public DialogTest() {
        MenuBar menubar = new MenuBar();
        Menu menu = new Menu("Dialog");
        menu.add(new MenuItem("Open..."));
        menu.addSeparator();
        menu.add(new MenuItem("Exit"));
        for (int i=0; i < menu.getItemCount(); i++)
            menu.getItem(i).addActionListener(this);
        menubar.add(menu);
        setMenuBar(menubar);
        resize(300,200);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getActionCommand().equals("Open...")) {
            Dialog d = new FirstDialog(this);
            d.show();
            d.dispose();
        }
        if (e.getActionCommand().equals("Exit")) {
            dispose();
            System.exit(0);
        }
    }
}

// First dialog
class FirstDialog extends Dialog implements ActionListener {
    Button ok;
    Button next;
    Frame frame;

    public FirstDialog(Frame frame) {
        super(frame,"First Dialog",true);
        this.frame = frame;
        ok = new Button(" OK ");
        ok.addActionListener(this);
        next = new Button(" Next ");
        next.addActionListener(this);
        Panel panel = new Panel();
        panel.add("West",ok);
        panel.add("East",next);
        add("South",panel);
        resize(150,70);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == next) {
            Dialog d = new SecondDialog(frame);
            d.show();
            d.dispose();
        }
        if (e.getSource() == ok)
            hide();
    }

}

class SecondDialog extends Dialog implements ActionListener {
    Button ok;

    public SecondDialog(Frame frame) {
        super(frame,"Second Dialog",true);
        ok = new Button(" OK ");
        ok.addActionListener(this);
        add("South",ok);
        resize(100,70);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == ok)
            hide();
    }
}

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