import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.border.*;
 
import java.awt.*; 
public class ProxyDisplay extends JxFrame
{
 public ProxyDisplay()
 {
 super("Display proxied image");
 JPanel p = new JPanel();
 getContentPane().add(p);
 p.setLayout(new BorderLayout());
 ImageProxy image = new ImageProxy("d:\\JavaProject\\Proxy\\src\\elliott.jpg", 321, 271);
 //ImageProxy image = new ImageProxy("c:\\winnt\\web\\Wallpaper\\Windows 2000.jpg", 321, 271);
 p.add("Center", image);
 p.add("North", new Label(" "));
 p.add("West", new Label(" "));
 setSize(370, 350);
 setVisible(true);
 }
//------------------------------------
 static public void main(String[] argv)
 {
 new ProxyDisplay();
 }
}
//==================================
class ImageProxy extends JPanel
 implements Runnable
{
 int height, width;
 MediaTracker tracker;
 Image img;
 JFrame frame;
 Thread imageCheck; //to monitor loading
//------------------------------------
 public ImageProxy(String filename, int w, int h)
 {
 height = h;
 width = w;
 
 tracker = new MediaTracker(this);
 img = Toolkit.getDefaultToolkit().getImage(filename);
 tracker.addImage(img, 0); //watch for image loading

 //imageCheck = new Thread(this);
 //imageCheck.start(); //start 2nd thread monitor
 
 //this begins actual image loading
 try{
 tracker.waitForID(0,1);
 }
 catch(InterruptedException e){}
 imageCheck = new Thread(this);
 imageCheck.start(); //start 2nd thread monitor
 
 }
//------------------------------------
 public void paint(Graphics g)
 {
 if (tracker.checkID(0)) 
 {
 height = img.getHeight(frame); //get height
 width = img.getWidth(frame); //and width
 
 g.setColor(Color.lightGray); //erase box
 g.fillRect(0,0, width+5, height+5);
 g.drawImage(img, 0, 0, this); //draw loaded image
 }
 else
 {
 //draw box outlining image if not loaded yet
 g.setColor(Color.red);
 g.drawRect(1, 1, width+10, height+10);
 }
 }
 //------------------------------------
 public Dimension getPreferredSize()
 {
 return new Dimension(width, height);
 }
 //public int getWidth() {return width;}
 //public int getHeight(){return height;}
 //------------------------------------
 public void run()
 {
 //this thread monitors image loading
 //and repaints when done
 //the 1000 msec is artifically long
 //to allow demo to display with delay
 try{
 Thread.sleep(1000);
 while(! tracker.checkID(0))
 Thread.sleep(1000);
 }
 catch(Exception e){}
 repaint();
 }
}