/* Auteur: Nicolas JANEY         */
/* nicolas.janey@univ-fcomte.fr  */
/* Novembre 2001                 */

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.applet.*;
import java.net.*;

public class DessinOffLine extends Applet implements MouseListener {

  public double a = 0.0 ;
  private Image i = null;
  private boolean db = false;

  public void init() {
    setBackground(Color.white);
    try {
      URL url = this.getDocumentBase();
      String adresse = "http://"+url.getHost()+"/IG/Java2D/Images/R1.gif" ;
      i = getImage(new URL(adresse)) ; }
    catch (MalformedURLException e) { }
    ThreadDessinOffLine tdol = new ThreadDessinOffLine(this);
    tdol.start();
    addMouseListener(this);
  }

  public void paint(Graphics g) {
    Graphics2D g2 =(Graphics2D) g;
    BufferedImage bi = new BufferedImage(getWidth(),getHeight(),BufferedImage.TYPE_INT_RGB);
    Graphics2D g2bi =(Graphics2D) bi.getGraphics();
    g2bi.setColor(Color.white);
    g2bi.fill(new Rectangle(0,0,getWidth(),getHeight()));
    AffineTransform at = new AffineTransform();
    at.translate(getWidth()/2,getHeight()/2);
    at.rotate(a);
    g2bi.setTransform(at);
    g2bi.setColor(Color.blue);
    if ( i != null ) {
      int tx = i.getWidth(this);
      int ty = i.getHeight(this);
      g2bi.draw(new Rectangle(-tx/2-1,-ty/2-1,tx+2,ty+2));
      g2bi.drawImage(i,-tx/2,-ty/2,this);
      g2.drawImage(bi,0,0,this); }
  }

  public void update(Graphics g) {
    if ( !db ) {
      Graphics2D g2 =(Graphics2D) g;
      g2.setColor(Color.white);
      g2.fill(new Rectangle(0,0,getWidth(),getHeight())); }
    paint(g);
  }

  public String getAppletInfo() {
    return "Dessin offline et double buffer.";
  }

  public void mouseClicked(MouseEvent e) {
    db = !db;
  }

  public void mouseEntered(MouseEvent e) {
  }

  public void mouseExited(MouseEvent e) {
  }

  public void mousePressed(MouseEvent e) {
  }

  public void mouseReleased(MouseEvent e) {
  }
}