package tp2.ArdoiseMagique; /**
   * ArdoiseMagique.java
   *
   * @author <a href="mailto:gery.casiez@lifl.fr">Gery Casiez</a>
   * @version
   */

  import java.awt.*;

  import javax.swing.*;
  import java.util.ArrayList;
  import java.util.Iterator;

  class Point {
    public Integer x,y;
  
    Point() {
      x = 0;
      y = 0;
    }
  
    Point(Integer x, Integer y) {
      this.x = x;
      this.y = y;
    }
  }
  
  class Curve {
    public ArrayList<Point> points;
  
    Curve() {
      points = new ArrayList<Point>();
    }
  
    public void addPoint(Point P) {
      points.add(P);
    }
  
    public void clear() {
      points.clear();
    }
  }

  public class ArdoiseMagique extends JPanel {
    private ArrayList<Curve> curves;
  
    public ArdoiseMagique(){
      curves = new ArrayList<Curve>();
      curves.add(new Curve());
      setBackground(Color.white);
    }
  
    public void addPoint(Integer x, Integer y) {
      curves.get(curves.size()-1).addPoint(new Point(x,y));
      repaint();
    }
  
    public void newCurve() {
      curves.add(new Curve());
    }
  
    public void clear() {
      curves.clear();
      curves.add(new Curve());
      repaint();
    }
  
    public void paintComponent(Graphics g) {
      Point Pprev, Pcurrent;
      super.paintComponent(g);
  
      Iterator<Curve> itcurve = curves.iterator();
  
      Pprev = new Point();
  
      // Pour chaque courbe
      while (itcurve.hasNext()) {
        Iterator<Point> it = itcurve.next().points.iterator();
  
        if (it.hasNext()) {
          Pprev = it.next();
        }
  
        // Dessine les points d'une courbe
        while (it.hasNext()) {
          Pcurrent = it.next();
          g.drawLine(Pprev.x,Pprev.y, Pcurrent.x, Pcurrent.y);
          Pprev = Pcurrent;
        }
      }
    }

  }