#ifndef _POLY_H_
#define _POLY_H_

#include <iostream>
#include "canvas.h"
#include "shape.h"

/* Points for the polygon. */
class Point 
{
 private:
	int _x, _y;
 public:
	Point(int x, int y) { _x = x; _y = y; }
	int x() { return _x; }
	int y() { return _y; }
	void move(int dx, int dy) { _x += dx; _y += dy; }
};

/* A polygon to which you can add points. */

/* Relation to origen:
    The first point added is the origen.
    All additional points added are stored relative to the current origen.
*/
class Polygon: public Shape
{
 private:
	Point *pts;	// Array of points.
	int ptsize;	// Size of the array.
	int npts;	// Number therein.
 public:
	Polygon(): Shape(0,0) { pts = new Point[ptsize = 10]; npts = 0; }
	Polygon(int npts, Point *pts): Shape(0, 0);
	~Polygon() { delete pts; }
	virtual void draw(Drawable &d);
	void add(int x, int y) { add(Point(x,y); }
	void add(Point p);
	void add(int npts, Point *pts);
};
#endif