import java.awt.*;
import java.net.*;

public class Screen extends Panel{

  Image offimage;
  Graphics offgraphics;
  Dimension offdimension;

  public void paint(Graphics g) {
    Dimension d = size();
    
    if ((offgraphics == null) || 
	(offdimension.width != d.width) ||
	(offdimension.height != d.height)) {
      p("initialized graphics");
      setForeground(Color.black);
      setBackground(Color.black);
      offimage = createImage(d.width, d.height);
      offgraphics = offimage.getGraphics();
      offdimension = d;
    }
    
    g.drawImage(offimage, 0, 0, this);
  }

  public void update(Graphics g){
    paint(g);
  }


  public void showImage(Image i) {
    Dimension d = size();

    //    if ((i.getWidth(this) > d.width) ||
    //	(i.getHeight(this) > d.height)) {
    //  if ((i.getWidth(this) - d.width) >
    //  (i.getHeight(this) - d.height)) {
    //i = i.getScaledInstance(d.width, -1 , i.SCALE_SMOOTH);
    //} else {
    //i = i.getScaledInstance(-1, d.height, i.SCALE_SMOOTH);
    //}
    //MediaTracker mt = new MediaTracker(this);
    //mt.addImage(i, 1);
    //try{
    //mt.waitForID(1);
    //}
    //catch (Exception e){
    //System.out.println(e);
    //}
    //}

    System.out.print(" at "+d.width+"x"+d.height);
    offgraphics.clearRect(0,0, d.width, d.height);
    offgraphics.drawImage(i,0,0,this);
    //    offimage = i;
    repaint();
  }

  private void p(String s) {
    System.out.println(s);
  }
  
  private void p(Exception e) {
    System.out.println(e);
  }

}