/*
 * MODIFS PYL oct 2005!!!!!!!!!!
 * 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 guiguyd2.java  ;java guiguyd2  
//javac guiguyd2.java  ; open index.html  

 
import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;
import javax.swing.*;
 
 
class GraphPanel extends Panel
    implements Runnable  {
    guiguyd2 graph;
	int x=150,y=10,v=0;
	 
   
	Thread relaxer;                      //thread
	
	public GraphPanel (){}

    GraphPanel(guiguyd2 graph) {
	this.graph = graph; 
    }

    
public void run() {                           //lancement 
        Thread me = Thread.currentThread();
	while (relaxer == me) {
	    repaint();                            //repaint
	    try {
		Thread.sleep(20);                     //temps de latence
	    } catch (InterruptedException e) {
		break;
	    }
	}
    }

 

    
    Image offscreen;
    Dimension offscreensize;
    Graphics offgraphics;
 

public synchronized void update(Graphics g) {
	    
    Dimension d = getSize();  
    offscreen = createImage(d.width, d.height);
    offscreensize = d;
    offgraphics = offscreen.getGraphics();

	//efface le graphique
	offgraphics.setColor(getBackground());
	offgraphics.fillRect(0, 0, d.width, d.height);
	offgraphics.setColor(Color.black) ;
	
	v++;
	y=y+v;
	if (y>d.height*9/10){v=-v;y=d.height*9/10;}
	x=x-(x/d.width)*d.width; 
	if(x<0)x=x+d.width;
	
	offgraphics.fillRect(x, y, 10, 10);

	g.drawImage(offscreen, 0, 0, null);              

	}
	
 
	
    public void start() {                     //lance le thread
	relaxer = new Thread(this);               
	relaxer.start();        
	}
 

}
 
public class guiguyd2 extends Applet  implements ActionListener {
    
    GraphPanel panel;                           //definition du panneau graphique
    Panel controlPanel;                         //definition du panneau
    
	JButton moins    = new JButton("Moinche");  //definition du Bouton
    JButton plus     = new JButton("Plouche");  //definition du Bouton
 	

    public void init() {                        //initialisation
		
	setLayout(new BorderLayout());              //plusieurs panneaux
	panel = new GraphPanel(this);               //creation  du panneau graphique
	add("Center", panel);                       //position
	
	 
	controlPanel = new Panel();                 //creation  du panneau  
	add("South", controlPanel);                 //position
	controlPanel.add(moins);                    //definition du Bouton
	moins.addActionListener(this);              //surveiller le bouton
	controlPanel.add(plus);                     //definition du Bouton
	plus.addActionListener(this);               //surveiller le bouton
	}

 

    public void start() { 
	panel.start();
	}
	
 
	
	
	 
    public void actionPerformed(ActionEvent e) {
		Object src = e.getSource();             //quelle action
	if (src == moins) { 
	     panel.x=panel.x-10;                             //x decremente
	    return;
	}
	
	if (src == plus) {  
		panel.x=panel.x+10;                              //x augmente
		return;
	}	 
}

 
   
	
///////////////////////////////////////////////////////////
	public static void main(String args[]) {
	JFrame f = new JFrame("guiguy par PYL");
	guiguyd2 guiguy = new guiguyd2();

	guiguy.init();
	guiguy.start();
	

	f.getContentPane().add(guiguy);
	f.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE ) ;
	f.setSize(300,300);
	f.setLocation(10, 10);
	f.show();
    }


}