import java.rmi.*;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;

public class ClientApplet extends JApplet {

   private RemoteServer remoteServer;

   private int x0Rect, x1Rect, y0Rect, y1Rect;
   private boolean picking = false;

   private double x0Real = -2, x1Real = 0.5, y0Real = -1.25, y1Real = 1.25;

   private Dimension d;
   private Image mi;
   private ThePanel panel = new ThePanel();

   public void init() {
      String url = "rmi://" + getCodeBase().getHost() + "/";
      try {
         remoteServer = (RemoteServer) Naming.lookup(url + "server2");

         System.out.println("CURRENT BINDINGS:");
         String[] bindings = Naming.list("");
         for(int i = 0; i < bindings.length; i++) {
            System.out.println(bindings[i]);
         }
      } catch(Exception e) {
         System.out.println("Exception generated: "+ e.getMessage());
      }
    
      getContentPane().add(BorderLayout.CENTER, panel);
      panel.addMouseListener(new MouseListener1());
      panel.addMouseMotionListener(new MouseMotionListener1());
      setSize(640, 400);
   }
   
   private Image updateImage() {
      try {
         int[] ia = remoteServer.updateImage(d, x0Real, x1Real, y0Real, y1Real);
         MemoryImageSource mis = new MemoryImageSource(d.width, d.height, ia, 0, d.width);
         return createImage(mis);
      } catch(Exception e) {
         System.out.println("Exception generated: "+ e.getMessage());
      }
      return null;
   }

   private void updateXYReal() {
      double x0RealTmp = x0Real + (x1Real - x0Real) * (double)x0Rect / d.width;
      double x1RealTmp = x0Real + (x1Real - x0Real) * (double)x1Rect / d.width;
      double y0RealTmp = y0Real + (y1Real - y0Real) * (double)y0Rect / d.height;
      double y1RealTmp = y0Real + (y1Real - y0Real) * (double)y1Rect / d.height;
      x0Real = x0RealTmp;
      x1Real = x1RealTmp;
      y0Real = y0RealTmp;
      y1Real = y1RealTmp;
   }

   class ThePanel extends JPanel {
      public void paintComponent(Graphics g) {
         super.paintComponent(g);
         if(!picking) {
            d = getSize();
            mi = updateImage();
            g.drawImage(mi, 0, 0, null);
         } else {
            g.drawImage(mi, 0, 0, null);
            g.setXORMode(Color.white);
            g.drawRect(x0Rect, y0Rect, Math.abs(x1Rect-x0Rect), Math.abs(y1Rect-y0Rect));
         }
      }
   }

   class MouseListener1 extends MouseAdapter {
      public void mousePressed(MouseEvent e) {
         picking = true;
         x0Rect = e.getX();
         y0Rect = e.getY();
      }

      public void mouseReleased(MouseEvent e) {
         updateXYReal();
         picking = false;
         panel.repaint();
      }
   }

   class MouseMotionListener1 extends MouseMotionAdapter {
      public void mouseDragged(MouseEvent e) {
         x1Rect = e.getX();
         y1Rect = e.getY();
         panel.repaint();
      }
   }
}