Name: skT88420 Date: 04/27/99


/*
  Dismissing an internal JOptionPane doesn't restore the focus.
  
  I consider this a bug, since a JOptionPane shouldn't affect anything
  in the parent component.
  
  Run this application. start typing into the field. When you exceed
  4 characters, an internal JOptionPane will appear. When you dismiss
  the message, the text field should still have the focus, but it doesn't.

  I tested this on Windows 98, but I'm assuming it's platform independent
*/

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.awt.event.*;
import java.awt.*;


public class OptionPaneFocusBug
  implements DocumentListener
{
  public static void main(String[] args)
  {
    JFrame mf = new JFrame("Option Pane Bug");
    mf.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
    mf.addWindowListener(new WindowAdapter()
      {
        public void windowClosing(WindowEvent evt)
        {
          System.exit(0);
        }
      });
    Container cp = mf.getContentPane();
    cp.setLayout(new FlowLayout());
    
    JTextField fld = new JTextField(40);
    Document doc = fld.getDocument();
    doc.addDocumentListener(new OptionPaneFocusBug(mf));
    cp.add(fld);
    
    mf.setBounds(10, 10, 400, 300);
    mf.show();
    fld.requestFocus();
  }
  
  JFrame myFrame;
  
  OptionPaneFocusBug(JFrame ff)
  {
    myFrame = ff;
  }
  
  public void insertUpdate(DocumentEvent evt)
  {
    Document doc = evt.getDocument();
    if (doc.getLength() > 4)
      JOptionPane.showInternalMessageDialog
        (myFrame.getContentPane(), "No more than 4 chars allowed");
  }
  
  public void removeUpdate(DocumentEvent e) {}
  public void changedUpdate(DocumentEvent e) {}
}
(Review ID: 57560)
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