viewport

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

/*


*/

public class viewport extends JApplet
{
public viewport()
{
Container contentPane = getContentPane();

JViewport jviewport = new JViewport();
JPanel jpanel = new JPanel();

jpanel.add(new JLabel(new ImageIcon("viewport.jpg")));

jviewport.setView(jpanel);

contentPane.add(jviewport, BorderLayout.CENTER);
contentPane.add(new buttonpanel(jviewport), BorderLayout.SOUTH);
}
}

class buttonpanel extends JPanel implements ActionListener
{
JViewport jviewport;

JButton button1 = new JButton("Scroll left");
JButton button2 = new JButton("Scroll up");
JButton button3 = new JButton("Scroll down");
JButton button4 = new JButton("Scroll right");

public buttonpanel(JViewport vport)
{
jviewport = vport;

add(button1);
add(button2);
add(button3);
add(button4);

button1.addActionListener(this);
button2.addActionListener(this);
button3.addActionListener(this);
button4.addActionListener(this);
}

public void actionPerformed(ActionEvent e)
{
Point position = jviewport.getViewPosition();

if(e.getSource() == button1) position.x += 10;
else if(e.getSource() == button2) position.y += 10;
else if(e.getSource() == button3) position.y -= 10;
else if(e.getSource() == button4) position.x -= 10;

jviewport.setViewPosition(position);
}
}