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

public class JCredits extends JFrame {

  static final int maxLines = 100;
  static final int WIDTH = 400;
  static final int HEIGHT = 500;
  
  String lines[];
  Dimension offDimension;
  Image offImage;
  Graphics offGrfx;
  int XPos = 5;
  int spacing = 12;
  int delay = 100;
  int current = HEIGHT;

  public JCredits() {
    JFrame.setDefaultLookAndFeelDecorated(true);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setTitle("Credits");
    setResizable(false);
    setSize(WIDTH, HEIGHT);
    show();
    
    setBackground(new Color(0, 0, 0));
    setForeground(new Color(255, 255, 255));
    setFont(new Font("Arial", Font.BOLD, 12));

    lines = new String[3];
    lines[0] = "Lead Designer: Marc Fisher";
    lines[1] = "Designer: Carl Soriano";
    lines[2] = "Lead Programmer: Marc Fisher";
    
    Dimension d = getSize();

    offImage = createImage(d.width, d.height);
    offGrfx = offImage.getGraphics();
    
    while (true) {
      repaint();
      current--;
      if((current + (maxLines * spacing)) < 0) {
        current = HEIGHT + spacing;
      }
      try { 
        Thread.sleep(delay); 
      }
      catch (InterruptedException e) { }
    }
  }
  
  public void paint(Graphics g) {
    update(g);
  }

  public void update(Graphics g) {
    Dimension d = getSize();

    // Create the offscreen graphics context
    if( (offGrfx == null) 
        || (d.width != offDimension.width)
        || (d.height != offDimension.height)) {
      offDimension = d;
      offImage = createImage(d.width, d.height);
      offGrfx = offImage.getGraphics();
    }
    
    offGrfx.setColor(new Color(0, 0, 0));
    offGrfx.fillRect(0, 0, WIDTH, HEIGHT);
    
    offGrfx.setColor(new Color(255, 255, 255));
    
    for(int n = 0; n < 3; n++) {
      offGrfx.drawString("Scroll",  XPos, current + (n * spacing));
    }

    g.drawImage(offImage, 0, 0, this);

  }
}