/**
*Class Draw is the GUI class for this distributed drawing application
*Internetprogrammering 1 - Course
*@author Martin Carlsson
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.net.*;
import java.io.*;



public class Draw extends JFrame {
    
    private Sender sender;
    private Receiver receiver;
    
    
    public Draw(int myPort, InetAddress toAdr, int toPort) throws IOException {
    
        sender = new Sender(toAdr, toPort);  
        Paper paper = new Paper(sender); 
        receiver = new Receiver(myPort, paper);
        receiver.start();
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        getContentPane().add(paper, BorderLayout.CENTER);
        setSize(640, 480);
        show();
    } 
    

    WindowAdapter closeWindow=new WindowAdapter() {
        public void windowClosing(WindowEvent e){
            sender.closeSendSocket();
            receiver.closeReceiveSocket();
            System.exit(0);
        } 
    };
    
    
    //Main
    public static  void main(String[] args) throws Exception  {
        
        System.err.println("\nUsage:<Local Port><Remote Address><Remote Port>\n");
                    
        if(args.length == 3)  {
            try {
                int myPort = Integer.parseInt(args[0]);
                InetAddress toAdr = InetAddress.getByName(args[1]);
                int toPort = Integer.parseInt(args[2]);
                Draw draw = new Draw(myPort,toAdr,toPort);
            }
            catch(UnknownHostException uHe) { 
                System.err.println("Cant find host"+args[1]);
            }
            catch(NumberFormatException nFe) {
                System.err.println("Bad port, need to be a number between 0 and 65535");
            }
        
        }
        else
            System.err.println("\nUsage:<Local Port><Remote Address><Remote Port>\n");
    }
} // class Draw
    
    
/* Class paper represents the middle area*/
class  Paper extends JPanel {
    private HashSet hs = new HashSet();
    private Sender sender;
    
    
    public Paper(Sender sender) {
        this.sender = sender;
        setBackground(Color.white);
        addMouseListener(new L1());
        addMouseMotionListener(new L2());
    }
    // Used for painting the pixels
    protected synchronized 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, 3, 3);
        }
    }
    
    
    // Adds a pixel to the Hashset and repaints
    protected  synchronized void addPoint(Point p) {
        hs.add(p);
        repaint();
    } 
    
    /*Listens to when the mouse is pressed*/
    private class L1 extends MouseAdapter {
        public void mousePressed(MouseEvent me) {
            Point p= me.getPoint();
            addPoint(p);
           sender.sendAway(p); 
        } 
    } 
    
    /*Listens to when the mouse is dragged*/
    private class L2 extends MouseMotionAdapter {
        public void mouseDragged(MouseEvent me) {
            Point p = me.getPoint();
            addPoint(p);
            sender.sendAway(p); 
        }
    } 
} // End class Paper