🚀 go-pugleaf

This dialog behaves different according to where I call it.
It is a kind of progress indicator dialog that has a cancel button
The dialog I am referring to is the DlgWait
If I call the Frame.go from the main, then everything works fine.
If I call the Frame.go from the actionPerformed, the DlgWait is displayed,
but it does not allow me to click the Cancel button to stop the operation

It seems to me that somehow, because the process is bizy does not handle the
"button pressed" event.

Does anybody has an explanation for the reason that this happens ?
Does enybody has a workaround on this problem ?

Here is the code:
-----------------
import javax.swing.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;


//   \  /       /\   /\
//  (o)(o)      <|> <|>
// [  \/  ]       =0=    //
//  \    /      /      \||
//              |      |//
//               [ ][ ]
//

public class Frame extends JFrame
{
   Frame m_Me;
   JButton  m_Btn;

   Frame ()
   {
      super();
      m_Me = this;
      m_Btn = new JButton ("go");
      this.getContentPane().add (m_Btn);
      m_Btn.addActionListener (new ActionListener (){
            public void actionPerformed (ActionEvent ev)
            {
               m_Me.go (); //HERE DOES NOT WORK
            }
         });
   }
   void go ()
   {
      int max = 1000;

      DlgWait pr = new DlgWait (this, "waiting...");
      pr.Show ("waiting...");

      //pr.setMinimum (0);
      pr.setMaximum (max);

      for (int i=0; i<max; i++)
      {
         pr.setProgress (i);
         if (pr.isCanceled ())
         {
       JOptionPane.showMessageDialog(null, "Message", "canceled",
JOptionPane.INFORMATION_MESSAGE);
            break;
         }
      }

 JOptionPane.showMessageDialog(null, "Message", "terminated normally",
JOptionPane.INFORMATION_MESSAGE);
      System.exit (0);
   }

   public static void main(String args[])
   {
      Frame f = new Frame ();
      f.pack ();
      f.setVisible (true);

 f.go (); //HERE WORKS OK
   }
}

/////////////////////////////////////

public class DlgWait extends JDialog
{
   DlgWait      m_Me;
   JLabel       m_Label;
   JProgressBar m_Prog;
   JButton      m_Cancel;
   boolean      m_bCanceled;

   DlgWait (Frame f, String fName)
   {
      super (f, fName, false);
      m_Me = this;
      this.getContentPane().setLayout (new GridLayout (3,1));

      m_Label = new JLabel ();
      m_Label.setPreferredSize (new Dimension(100, 20));
      this.getContentPane().add (m_Label);

      m_Prog = new JProgressBar ();
      this.getContentPane().add (m_Prog);

      m_Cancel = new JButton ("Cancel");
      this.getContentPane().add (m_Cancel);
      m_Cancel.addActionListener (new ActionListener (){
            public void actionPerformed (ActionEvent ev)
            {
               m_Me.Hide ();
            }
         });
      m_bCanceled = false;
      pack ();
   }
   void Show (String s)
   {
      CenterMe ();
      this.setVisible (true);
      m_Label.setText (s);
      for (int ii=0; ii<30; ii++)
         ShowAll ();
   }
   void Hide ()


      m_bCanceled = true;
      this.setVisible (false);
   }
   void ShowAll ()
   {
      m_Label.paintImmediately (m_Label.getBounds());
      m_Prog.paintImmediately (m_Label.getBounds());
      m_Cancel.paintImmediately (m_Label.getBounds());
   }
   void CenterMe ()


      Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
      Dimension size = getSize();
      int x = screenSize.width / 2 - size.width / 2;
      int y = screenSize.height / 2 - size.height / 2;

      setBounds (x, y, size.width, size.height);
   }
   void setNote (String s)
   {
      m_Label.setText (s);
      m_Label.paintImmediately (m_Label.getBounds());
   }
   void setMinimum (int i)
   {
      m_Prog.setMinimum (i);
   }
   void setMaximum (int i)
   {
      m_Prog.setMaximum (i);
   }
   void setProgress (int i)
   {
      m_Prog.setValue (i);
      m_Prog.paintImmediately (m_Label.getBounds());
   }
   boolean isCanceled ()
   {
      return m_bCanceled;
   }
}