Name: mc57594 Date: 02/26/97


Modal dialog boxes using the old event model hang. Try the "About..." box (under Help) in my Image/J applet at http://rsb.info.nih.gov/IJ/ for an example. This dialog is based on the InfoDialog class ("http://www.ora.com/catalog/javanut/examples/section5/InfoDialog.java") from "Java in a Nutshell".

company - National Institutes of Health , email - ###@###.###
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New Test to reproduce bug. Please see Note: in testcase to see how to reproduce
the bug.

/*
 * JAVA AWT LIBRARY TEST
 *
 * FileName : bug_4058817_app.java
 * Purpose : To ensure correctness wiith Dialog show and dispose. This test
 * will test for a deadlock of a spawned dialog frame.
 * Created by : Ron Mann and Gary Collins on 11/25/97
 *
 * Note: Steps to test program
 * 1: Start the test by typing the following.
 * java bug_4058817_app 10
 * 2: The 10 is the number of Dialog threads you would like to run the tests.
 * The test needs to hava a minimal of 3 dialogs with the test repeated
 * 2 times per plateform.

 * pass = program will terminate by itself. Return code 0
 * fail = The User will have to terminate the program by hand. Usually Control C
 * will do the trick.
 *
 */

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

public class bug_4058817_app
{
  public static void main( String args[] )
  {
    int numdlgs = 1;
    int i;
Frame f = new Frame();

if ( args.length > 0 )
numdlgs = Integer.parseInt(args[0]);
System.out.println ( "Creating " + numdlgs + " Modal Dialogs\n");

for ( i = 0; i < numdlgs; i++ )
{
DlgThread dt = new DlgThread();
dt.setData(f);
dt.nthreads = i;
dt.checknumdlgs = numdlgs;
dt.start();

}
  }
}

class DlgThread extends Thread implements ActionListener
{
  Dialog d;
  Frame f;
  int nthreads;
  int count = 0;
  static int loop = 0;
  int checknumdlgs = 0;
  Dialog nd;
  
  public void setData ( Frame frame )
  {
    f = frame;
  }
  
  public void actionPerformed (ActionEvent ev )
 {
   if ( count == 0 )
    {
       nd = new Dialog ( f,"I am new Dialog", true );
       Button b = new Button("I Kill YOU!");
       nd.add ( b );
       b.addActionListener( this );
       count++;
       loop++;
       nd.pack();
       nd.setLocation( (nthreads + 2 ) * 50, (nthreads + 2 ) * 50 );
       d.dispose();
       nd.setSize(200,200);
       nd.setVisible(true);
    }
   else {
     nd.dispose();
     count = 0;
     System.out.println("Loop: "+loop+"(checknumdlgs: "+(checknumdlgs));
     if (loop == (checknumdlgs)) {
       System.out.println("Programed worked as designed");
       System.exit(0);
     }
   }
 }
  public void run()
  {
    Button b = new Button("Quit");
    String hello = new String( "I am Thread " + nthreads );
    d = new Dialog ( f, hello, true );
    
    d.add ( b );
    b.addActionListener( this );
    nthreads++;
    System.out.println(nthreads);
    d.pack();
    d.setLocation( nthreads * 50, nthreads * 50 );
    d.setSize(200,200);
    d.setVisible(true);
  }
}

gary.collins@East 1998-07-15