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

import java.util.*;
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.applet.*;

public class Clipping extends Applet implements MouseListener,MouseMotionListener {

  private int initX = 0 ;
  private int initY = 0 ;
  private int px = 255 ;
  private int py = 20 ;
  private int dx = 0 ;
  private int dy = 0 ;

  public void init() {
    setBackground(Color.white);
    addMouseMotionListener(this);
    addMouseListener(this);
  }

  public void paint(Graphics g) {
    Graphics2D g2 =(Graphics2D) g;
    g2.setColor(Color.red) ;
    g2.fill(new Rectangle(25,40,190,110)) ;
    Shape oldClip = g2.getClip() ;
    g2.setClip(new Ellipse2D.Double(px+dx,py+dy,150,150)) ;
    g2.fill(new Rectangle(235,40,190,110)) ;
    g2.setClip(oldClip) ;
    g2.setColor(Color.black) ;
    g2.draw(new Ellipse2D.Double(45,20,150,150)) ;
    g2.draw(new Ellipse2D.Double(px+dx,py+dy,150,150)) ;
  }

  public String getAppletInfo() {
    return "Gestion du clipping sous Java 2D.";
  }

  public void mouseDragged(MouseEvent e) {
    int x =e.getX();
    int y =e.getY();
    dx = x - initX;
    dy = y - initY;
    repaint();
  }

  public void mouseMoved(MouseEvent e) {
  }

  public void mouseClicked(MouseEvent e) {
  }

  public void mouseEntered(MouseEvent e) {
  }

  public void mouseExited(MouseEvent e) {
  }

  public void mousePressed(MouseEvent e) {
    initX = e.getX() ;
    initY = e.getY() ;
    dx = 0;
    dy = 0;
  }

  public void mouseReleased(MouseEvent e) {
    px = px+dx;
    py = py+dy;
    dx = 0;
    dy = 0;
    repaint();
  }
}