//
//  Element.java
//  
//
//  Created by cathy on Tue Jul 31 2001.
//  Copyright (c) 2001 __CompanyName__. All rights reserved.
//

import java.awt.*;
import java.awt.geom.*;

public abstract class Element {

    protected Color color;
    
    public Element(Color color) {
        this.color = color;
    }
    
    public Color getColor() {
        return color;
    }
    
    public abstract Shape getShape();
    public abstract java.awt.Rectangle getBounds();
    public abstract void modify(Point debut, Point fin);
    
    public static class Ligne extends Element {
        
        private Line2D.Double  ligne;
        
        public Ligne(Point debut, Point fin, Color couleur) {
            super(couleur);
            ligne = new Line2D.Double(debut, fin);
        }
        
        public Shape getShape() {
            return ligne;
        }
        
        public java.awt.Rectangle getBounds() {
            return ligne.getBounds();
        }
        
        public void modify(Point debut, Point fin) {
            ligne.x1 = debut.x;
            ligne.y1 = debut.y;
            ligne.x2 = fin.x;
            ligne.y2 = fin.y;
        }
        
    }
    
    public static class Rectangle extends Element {
        private Rectangle2D.Double rectangle;
        
        public Rectangle(Point debut, Point fin, Color couleur) {
            super(couleur);
            rectangle = new Rectangle2D.Double (
                Math.min(debut.x, fin.x), Math.min(debut.y, fin.y), // coin superieur gauche
                Math.abs(debut.x - fin.x), Math.abs(debut.y - fin.y)); // largeur et hauteur
        }
        public Shape getShape() {
            return rectangle;
        }
        public java.awt.Rectangle getBounds() {
            return rectangle.getBounds();
        }
        public void modify(Point debut, Point fin) {
            rectangle.x = Math.min(debut.x, fin.x);
            rectangle.y = Math.min(debut.y, fin.y);
            rectangle.width = Math.abs(debut.x - fin.x);
            rectangle.height = Math.abs(debut.y - fin.y);
        }
    }

    public static class Cercle extends Element {
        private Ellipse2D.Double cercle;
        
        public Cercle(Point centre, Point circonference, Color couleur) {
            super(couleur);
            double rayon = centre.distance(circonference);
            cercle = new Ellipse2D.Double (centre.x - rayon, centre.y - rayon,
                                            2.*rayon, 2.*rayon);
         }
        public Shape getShape() {
            return cercle;
        }
        public java.awt.Rectangle getBounds() {
            return cercle.getBounds();
        }
        public void modify(Point centre, Point circonference) {
            double rayon = centre.distance(circonference);
            cercle.x = centre.x - (int)rayon;
            cercle.y = centre.y - (int)rayon;
            cercle.width = cercle.height = 2*rayon;
        }
    }

    public static class Courbe extends Element {
        private GeneralPath courbe;
        
        public Courbe(Point debut, Point next, Color couleur) {
            super(couleur);
            courbe = new GeneralPath();
            courbe.moveTo(debut.x, debut.y);
            courbe.lineTo(next.x, next.y); // ou bien debut.x, debut.y
         }
        public Shape getShape() {
            return courbe;
        }
        public java.awt.Rectangle getBounds() {
            return courbe.getBounds();
        }
        public void modify(Point debut, Point next) {
            courbe.lineTo(next.x, next.y);	// prolonger la courbe
        }
    }

}