Child JWindow containing JTextField takes focus from JFrame

Question

I have a bit of a unique problem.
I have a JFrame as the main application window. I then create a JWindow with a JTextField that I would like to use as a Popup Palette. The problem is that when I click in the text box, the title bar of the JFrame changes it's appearance because the focus is now on the text box in the JWindow.
If I use setFocusableWindowState(false) on the JWindow then the title bar of the JFrame does not change(which is the behaviour I want), but I cannot type in the JTextField.
I understand why this is happening. The JTextField needs to have focus in order to recieve input and because it is in the JWindow, the JWindow takes the focus away from the JFrame.
Does anyone know how I can make it so the JFrame Title Bar does not change appearance when the JTextField in the JWindow gets focus?
The only thing that I can think of, is to somehow change the JFrame Look & Feel so that the title does not change appearance when the JFrame looses focus. I have no idea how to do that though.
If you are wondering why I need this, it is because I need a JTextField to display on top of a Heavyweight component. I want it to appear as if it is part of the same window. Having the title bar of the JFrame change when you click in the textbox kind of destroys the illusion that it is part of the heavyweight component.
Also, if you know of any other ways to get the JTextField to display and work on top of a Heavyweight component then I would appreciate that as well.
Here is an example that you can run to see the behaviour. You can try it with the setFocusableWindowState line both uncommented and commented out.
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JWindow;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class TestFocus implements Runnable {
    private JFrame frame;
    private JWindow popup;
    public void run() {
        //Create a new Frame
         frame = new JFrame("Frame Test");
         JButton but = new JButton("Does Nothing");
        frame.getContentPane().add(but);
        frame.setPreferredSize(new Dimension( 500, 500 ));
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        //Create a JWindow with a JTextField
        popup = new JWindow( frame );
        JPanel p = new JPanel(new BorderLayout());
        JTextField txt = new JTextField();
        p.add( txt, BorderLayout.NORTH );
        JButton but2 = new JButton("Also does nothing");
        p.add(but2, BorderLayout.SOUTH);
        popup.getContentPane().add(p);
        popup.setLocation( frame.getLocation().x + 50, frame.getLocation().y + 50 );
        popup.pack();
        //Proper title behaviour if I have this statement
        //but then I can't type in the text box.
        //popup.setFocusableWindowState(false);
        popup.setVisible(true);
    public static void main(String[] args) {
        try {
            System.setProperty("sun.java2d.noddraw", "true");
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        catch (Exception e) {
        SwingUtilities.invokeLater(new TestFocus());
}Thanks,
Jeff

Answer 1

The code works fine on XP using JDK1.4.2, maybe its a version/platform issue check the bug database.
-> if you know of any other ways to get the JTextField to display and work on top of a Heavyweight component
You could try using
JPopupMenu.setDefaultLightWeightPopupEnabled(false)and then add the JTextField to a jPopupMenu instead of a JWindow (although behind the scenes I think it will use a JWindow as the popup, so it may not solve the problem either if it is a version/platform issue).