/*
 * @(#)Graph.java	1.9 99/08/04    
 * MODIFS PYL fev  2007!!!!!!!!!!  
 * www.lmm.jussieu.fr/~lagree
 + py@cccr.jussieu.fr
 *
 * This software is  designed and intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear facility.
 */
 
 
//javac guiBrachistochrone.java Kul.java   ;java guiBrachistochrone  
//javac guiBrachistochrone.java Kul.java; jar cf guiBrachistochrone.jar *.class; open index.html  


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

import java.net.*;

 
class GraphPanel extends Panel
    implements Runnable, MouseListener {
    guiBrachistochrone graph;
	Kul kkul=new Kul();
    public double dt0=0.001;
 
    
    
    
	Thread relaxer;
	
	public GraphPanel (){
	}

    GraphPanel(guiBrachistochrone graph) {
	this.graph = graph;
	addMouseListener(this);
    }

    void initout() {
    System.out.println("init t=" + kkul.t +" ....................... dt     =" +dt0);
	kkul.start();
	}
	
 
	 

    public void run() {
        Thread me = Thread.currentThread();
	while (relaxer == me) {
	    relax();
	    try {
		Thread.sleep(2);
	    } catch (InterruptedException e) {
		break;
	    }
	}
    }

    synchronized void relax() {
	repaint();
    }

    
    Image offscreen;
    Dimension offscreensize;
    Graphics offgraphics;
 

    public synchronized void update(Graphics g) {
	    
      Dimension d = getSize();
      if ((offscreen == null) || (d.width != offscreensize.width) || (d.height != offscreensize.height)) {
	    offscreen = createImage(d.width, d.height);
	    offscreensize = d;
	    if (offgraphics != null) {
	        offgraphics.dispose();
	    }
	    offgraphics = offscreen.getGraphics();
	    offgraphics.setFont(getFont());
	}
	 int offset=25;  
	offgraphics.setColor(getBackground());
	offgraphics.fillRect(0, 0, d.width, d.height);
	
	
	if(kkul.visi==1){
	offgraphics.setColor(Color.green) ;
	for (int i = 1 ; i <= kkul.n ; i++) {
	  offgraphics.drawLine(d.width/4+(i-1)*d.width/kkul.n/2, d.height*8/10-(int)(d.height*kkul.B[i-1]/2)- offset,
		                     d.width/4+   i* d.width/kkul.n/2, d.height*8/10-(int)(d.height*kkul.B[ i ]/2)- offset);
	}}
	
	offgraphics.setColor(Color.black) ;
	offgraphics.drawLine(d.width/4,  d.height*8/10 - offset,(3*d.width)/4 ,  d.height*8/10 - offset);
	offgraphics.drawLine(d.width/4,  d.height*8/10  - offset,d.width/4 , d.height*3/10 - offset);
	offgraphics.drawLine((3*d.width)/4,  d.height*8/10- offset,(3*d.width)/4 , d.height*3/10- offset);
	offgraphics.drawLine(d.width/4,  d.height*3/10- offset,(3*d.width)/4, d.height*3/10- offset);
	offgraphics.drawString(" T parcours="+ (((int)(kkul.Tfinal*100))/100.)+
	 "       Record T="+ (((int)(kkul.Trecord*100))/100.) ,  2*d.width/5, d.height/8);
	offgraphics.drawString("t="+(((int)(kkul.t*100))/100.)+" ",  d.width/6, d.height/9);	
	
	offgraphics.setColor(Color.red) ;
	for (int i = 1 ; i <= kkul.n ; i++) {
	    offgraphics.drawLine(d.width/4+(i-1)*d.width/kkul.n/2, d.height*8/10-(int)(d.height*kkul.T[i-1]/2)- offset,
		                     d.width/4+   i* d.width/kkul.n/2, d.height*8/10-(int)(d.height*kkul.T[ i ]/2)- offset);
	}
	
	offgraphics.setColor(Color.black) ;
	offgraphics.drawString("x=0, y=0",  d.width/6, 6*d.height/8);	
	offgraphics.drawString("x=4, y=0",  6*d.width/8, 6*d.height/8);	
	offgraphics.drawString("x=0, y=1",  d.width/6, d.height/5);	
	


	offgraphics.setColor(Color.blue) ;
	int ifr,jfr;
	double x=(d.width/4+((kkul.n*kkul.xp/kkul.Ldom))*d.width/kkul.n/2);
	double y=d.height*8/10-(int)(d.height*kkul.yp/2);
	ifr =(int)x;
	jfr =(int)y;
//	System.out.println("pressed "+ ifr + " " + jfr);
//	offgraphics.fillRect(ifr-2,jfr-2 - offset, 10, 10);
	offgraphics.fillArc(ifr-2,jfr-offset-8,8,8, 0,360);

	
	
	g.drawImage(offscreen, 0, 0, null);
    }
 
	 
    //1.1 event handling
    public void mouseClicked(MouseEvent e) {}
    public void mousePressed(MouseEvent e) {
 	  int offset=25;   
	if((e.getX()>getSize().width/4)&&(e.getX()<3*getSize().width/4)){
	    int iT=(e.getX()-getSize().width/4)*2*kkul.n/(getSize().width);
		double vT=-(e.getY()-getSize().height*8/10   + offset)*2.0/(getSize().height);
		int ii=15;
		if(iT<ii)ii=iT;
		double pt;
		
		if(iT<kkul.ifinal){
		pt=(vT-kkul.T[iT-ii])/(ii);
		for (int i = 1 ; i <= ii ; i++) {
		kkul.T[iT-ii+i]=kkul.T[iT-ii]+ (i)*pt;}
		}
 

	
	
		
		ii=15;
		if(iT>kkul.ifinal-ii)ii=kkul.ifinal-iT;
		pt=(kkul.T[iT+ii]-vT)/(ii);
		for (int i = 1 ; i <= ii ; i++) {
		kkul.T[iT+i]=vT+ (i)*pt;}
		
		for (int i = 1 ; i < kkul.n ; i++) {
			kkul.To[i]=(kkul.T[i]);
		}
	
	
		for (int i = 1 ; i < kkul.n ; i++) {
			kkul.To[i]=kkul.To[i] + 0.07*(kkul.T[i-1]-2*kkul.T[i]+kkul.T[i+1]);
		}
		for (int i = 1 ; i < kkul.n ; i++) {
			kkul.T[i]=(kkul.To[i]);
		}
		
;

	 System.out.println("pressed "+e.getX()+" "+e.getY()+" " +getSize().width/4/(getSize().width/kkul.n/2));
	}}
    public void mouseReleased(MouseEvent e){}
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e)  {}
    public void mouseDragged(MouseEvent e) {}
    public void mouseMoved(MouseEvent e)   {}
	
    public void start() {
	relaxer = new Thread(this);
	relaxer.start();
	}

    public void stop() {
	relaxer = null;
    }

}
 
public class guiBrachistochrone extends Applet  implements ActionListener, ItemListener {
	public AudioClip sound0=null;
    GraphPanel panel;
    Panel controlPanel;
	
    
	JButton raz    = new JButton("RAZ"); 
    JButton calcul = new JButton("Calcul");
    JButton pause  = new JButton("Pause");
    JButton razR    = new JButton("RAZ Record");
    JButton AB    = new JButton("Affiche/Masque B.");
	JButton kit = new JButton("Quitte"); 
	
    JLabel lab = new JLabel("<html>  </html>  ", JLabel.CENTER) ; 
	JTextField saizie= new JTextField ("0.000"); 
	Choice choix = new Choice();
	JLabel labo = new JLabel("                   ", JLabel.CENTER) ; 
	JTextField saizio= new JTextField ("4.000");

    public void init() { 
	setLayout(new BorderLayout()); 
	panel = new GraphPanel(this);
	add("Center", panel);
	saizie.setText(""+panel.dt0);
	 
	controlPanel = new Panel();
	add("South", controlPanel); 
    controlPanel.add(lab) ;   lab.setText("  dt=   ") ;
	controlPanel.add(saizie);
	raz.setLocation(10,10);raz.setSize(220,23); controlPanel.add(raz);  raz.addActionListener(this);
	controlPanel.add(razR);  razR.addActionListener(this);
	controlPanel.add(calcul); calcul.addActionListener(this);
	controlPanel.add(pause);  pause.addActionListener(this);
	String champ="x final=";
	controlPanel.add(labo) ;  labo.setText(champ) ;
    controlPanel.add(saizio);
	controlPanel.add(new JLabel("...", Label.RIGHT));       
        choix.addItemListener(this);
    controlPanel.add(AB);  AB.addActionListener(this);    
    controlPanel.add(kit);    kit.addActionListener(this);
	panel.initout();
	
	
	}

    public void destroy() {
        remove(panel);
        remove(controlPanel);
    }

    public void start() {
	razz(); 
	panel.start();
	}
	

    public void stop() {
	panel.stop();
    }
	
	
	public void razz() {
		change_it(); 
	 panel.kkul.prems();
	 	 synchronized (panel.kkul) {
		 panel.kkul.pleaseWait = true;}/////TRUE}
	 change_it(); 
	 System.out.println("Init" );
	     }

    public void actionPerformed(ActionEvent e) {
		Object src = e.getSource();
	if (src == razR){
		System.out.println("RAZR");
		panel.kkul.Trecord=9999.;
	}
	if (src == AB){
		System.out.println("AB "+panel.kkul.visi);
		if(panel.kkul.visi==1){panel.kkul.visi=0;}else{panel.kkul.visi=1;}
	}	
	if (src == raz) { 
	    razz(); 
    	System.out.println("RAZ, t=" + panel.kkul.t);
 
		return;
	}
	
	if (src == calcul) { 
	    String ch=saizie.getText();
		double z =Double.parseDouble(ch);  
	    System.out.println("calcul, t=" + panel.kkul.t + "................dt =" + z );
	    panel.kkul.setdt(z);  
	    change_it();
		
        synchronized (panel.kkul) {
		  System.out.println("calcul");
            panel.kkul.pleaseWait = false;
            panel.kkul.notify();}
		return;
	}

	if (src == pause) {
		 synchronized (panel.kkul) {
		 panel.kkul.pleaseWait = true;}
		  
	    	}
	if (src == kit) {
		  destroy(); 
		  System.out.println("kenavo"); 
		  System.exit(0) ;
	    	}		
    }

    public void itemStateChanged(ItemEvent e) {
	 change_it();
	    }

   public void change_it(){
   int ined=choix.getSelectedIndex(); 
	String ch=saizie.getText();
	double z =Double.parseDouble(ch); 
    ch=saizio.getText();
	z =Double.parseDouble(ch);
	double zz;
	int iz;
	zz=2*z;
	iz=(int)zz;
	z=iz/2.; 
	if(z>panel.kkul.Ldom){z=panel.kkul.Ldom;}
	System.out.println("param  " +  z  );
	panel.kkul.xfinal=z;
	ch=""+z;
	saizio.setText(ch);
		
//	labo.setText("T record....") ;
	
   }
   
   
	
///////////////////////////////////////////////////////////
	public static void main(String args[]) {
	JFrame f = new JFrame("guiBrachistochrone  par PYL");
	guiBrachistochrone guiBrachistochrone = new guiBrachistochrone();
	//System.out.println(args[]);

	guiBrachistochrone.init();
	guiBrachistochrone.start();
	
	f.getContentPane().add("Center", guiBrachistochrone);
	f.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE ) ;
	f.setSize(900, 300);
	f.setLocation(200, 200);
	f.show();
    }

    public String getAppletInfo() {
        return "Calcul interactif par PYL. \n 'java guiGraph' \nou applet.";
    }

}