Flyvske paneler

Halløjsa!

Jeg har lavet et lille program i Borland Builder 8.0, hvor jeg kan flytte rundt på et panel, og skjule det.
Man kan flytte panelet ved at trække i det.
Problemet er at paneler ryger tilbage til sin orriginale pladsering, når det bliver skjult/vist...

Nogen der kan forklare hvorfor? Er det pga. XY-layoutet? (Som er med i Buildere).

Hvad kan man gøre for at fixe det?

Tak!

----
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;

public class Applet1 extends Applet {
  private boolean isStandalone = false;
  JPanel jPanel1 = new JPanel();
  XYLayout xYLayout1 = new XYLayout();
  boolean vis=true;
  JButton jButton1 = new JButton();
  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet
  public Applet1() {
  }
  //Initialize the applet
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    this.setLayout(xYLayout1);
    jPanel1.setBackground(Color.red);
    jPanel1.addMouseMotionListener(new Applet1_jPanel1_mouseMotionAdapter(this));
    jButton1.setText("jButton1");
    jButton1.addActionListener(new Applet1_jButton1_actionAdapter(this));
    this.add(jPanel1, new XYConstraints(153, 19, 84, 162));
    this.add(jButton1,  new XYConstraints(155, 198, 74, 71));
  }
  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }
  //Get parameter info
  public String[][] getParameterInfo() {
    return null;
  }

  void jButton1_actionPerformed(ActionEvent e) {
    vis=!vis;
    jPanel1.setVisible(vis);
  }

  void jPanel1_mouseDragged(MouseEvent e) {
    jPanel1.setLocation(e.getX()+jPanel1.getX(), e.getY()+jPanel1.getY());
  }
}

class Applet1_jButton1_actionAdapter implements java.awt.event.ActionListener {
  Applet1 adaptee;

  Applet1_jButton1_actionAdapter(Applet1 adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}

class Applet1_jPanel1_mouseMotionAdapter extends java.awt.event.MouseMotionAdapter {
  Applet1 adaptee;

  Applet1_jPanel1_mouseMotionAdapter(Applet1 adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseDragged(MouseEvent e) {
    adaptee.jPanel1_mouseDragged(e);
  }
}