Components not moving in JFrame while dragging the frame

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JViewport;
import javax.swing.border.LineBorder;
public class ImagePanel extends JPanel
{
public static final int TILED = 0;
public static final int SCALED = 1;
public static final int ACTUAL = 2;
 
private BufferedImage image;
private int style;
private float alignmentX = 0.5f;
private float alignmentY = 0.5f;
 
public ImagePanel(BufferedImage image)
{
this(image, TILED);
}
 
public ImagePanel(BufferedImage image, int style)
{
this.image = image;
this.style = style;
setLayout( new BorderLayout() );
}
 
public void setImageAlignmentX(float alignmentX)
{
this.alignmentX = alignmentX > 1.0f ? 1.0f : alignmentX < 0.0f ? 0.0f : alignmentX;
}
 
public void setImageAlignmentY(float alignmentY)
{
this.alignmentY = alignmentY > 1.0f ? 1.0f : alignmentY < 0.0f ? 0.0f : alignmentY;
 
}
 
public void add(JComponent component)
{
add(component, null);
}
 
public void add(JComponent component, Object constraints)
{
component.setOpaque( false );
 
if (component instanceof JScrollPane)
{
JScrollPane scrollPane = (JScrollPane)component;
JViewport viewport = scrollPane.getViewport();
viewport.setOpaque( false );
Component c = viewport.getView();
 
if (c instanceof JComponent)
{
((JComponent)c).setOpaque( false );
}
}
 
super.add(component, constraints);
}
 
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
 
if (image == null ) return;
 
switch (style)
{
case TILED :
drawTiled(g);
break;
 
case SCALED :
Dimension d = getSize();
g.drawImage(image, 0, 0, d.width, d.height, null);
break;
 
case ACTUAL :
drawActual(g);
break;
}
}
 
private void drawTiled(Graphics g)
{
Dimension d = getSize();
int width = image.getWidth( null );
int height = image.getHeight( null );
 
for (int x = 0; x < d.width; x += width)
{
for (int y = 0; y < d.height; y += height)
{
g.drawImage( image, x, y, null, null );
}
}
}
 
private void drawActual(Graphics g)
{
Dimension d = getSize();
float x = (d.width - image.getWidth()) * alignmentX;
float y = (d.height - image.getHeight()) * alignmentY;
g.drawImage(image, (int)x, (int)y, this);
}
 
public static void main(String [] args)throws Exception
{
BufferedImage image = javax.imageio.ImageIO.read(new java.io.File("c:\\final.jpg"));
ImagePanel south = new ImagePanel(image, ImagePanel.SCALED);
south.setPreferredSize(new Dimension(490, 340));
south.setLayout(null);
JPanel panEmail = new JPanel();
panEmail.setBounds(5,105,350,50);
JTextField toAddress = new JTextField(28);
toAddress.setBorder( new LineBorder(Color.gray, 1) );
JPanel panTextArea = new JPanel();
panTextArea.setBounds(25,135,420,180);
JTextArea msgArea = new JTextArea(10,38);
msgArea.setBorder( new LineBorder(Color.gray, 1) );
panTextArea.add(msgArea);
panEmail.add(toAddress);
south.add(panEmail);
south.add(panTextArea);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add( south);
frame.pack();
frame.setVisible(true);
}
public static void setSize(ImagePanel ip, int x, int y){
}
}

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