/**
 * @Draw.java
 * 
 * Utgår ifrån program enligt tips.
 * Jag kommenterar endast saker jag lagt till eller ändrat i filen.
 * 
 * @version 1.0 06/10/01
 *
 *
 */

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


public class Draw extends JFrame {
  private Paper p = new Paper();;
  private Communicator myCommunicator;
  private Thread commThread;

	/*
	 * Main, Kollar arguments, och
	 * agerar utifrån dem.
	 *
	 *
	 */
  public static void main(String[] args) {
  		Draw theBoard = new Draw(args);
  		Thread commThread;
  }

  public Draw(String[] args) {
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    getContentPane().add(p, BorderLayout.CENTER);

    setSize(640, 480);
    setVisible(true);
    
    // Inga args, ERROR
   	if(null == args || args.length < 2) {
   			System.err.println("Invalid Args; Need: host port");
   			
   		}
   	//annars ARGS
	else if(args!=null && args[1]!=null && args.length == 3){
			Integer aport = new Integer(args[0]);
			Integer remotePort = new Integer(args[2]);
			
			myCommunicator = new Communicator(aport, p, args[1], remotePort,p);
			p.setCommunicator(myCommunicator);
			commThread = new Thread(myCommunicator);
   			commThread.start();
			
	}else{
		System.out.println("Invalid arguments, exiting");	
		}
  }
}

class Paper extends JPanel {
  private HashSet hs = new HashSet();
  private Communicator myCommunicator;

  public Paper() {
    setBackground(Color.white);
    addMouseListener(new L1());
    addMouseMotionListener(new L2());
  }
  
  public void setCommunicator(Communicator c){
  	myCommunicator = c;
  }

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    g.setColor(Color.black);
    Iterator i = hs.iterator();
    while(i.hasNext()) {
      Point p = (Point)i.next();
      g.fillOval(p.x, p.y, 2, 2);
    }
  }

	/*
	 * Ändrat så vi skickar datat via
	 * communicator.
	 */
  private void addPoint(Point p) {
  	drawPoint(p);
    myCommunicator.packAndsend(p);
  }
  
  /*
   * Metod som ritar utan att skicka,
   * motsvarar addpoint inann jag ändrade den.
   * Används för att rita mottagna prickar.
   */
   public void drawPoint(Point p) {
   	 	hs.add(p);
    	repaint();
  }

  class L1 extends MouseAdapter {
    public void mousePressed(MouseEvent me) {
      addPoint(me.getPoint());
    }
  }

  class L2 extends MouseMotionAdapter {
    public void mouseDragged(MouseEvent me) {
      addPoint(me.getPoint());
    }
  }
}