#ifndef CURVEAREA_H
#define CURVEAREA_H


#include <vector>

#include "activearea.h"


class CurvesArea: public ActiveArea {
public:
	class CurvePoint {
	public:
		ActivePoint::Handle p, t;
		
		explicit CurvePoint(const Vector &p = Vector(), const Vector &t = Vector()):
			p(new ActivePoint(p)),
			t(new ActivePoint(p + t, Color::yellow()))
			{ }
		
		const Vector& get_p() const { return p->position; }
		Vector get_t() const { return t->position - p->position; }
		
		void add_to(CurvesArea &area) const { area.add_point(p); area.add_point(t); }
		void remove_from(CurvesArea &area) const { area.remove_point(p); area.remove_point(t); }
	};

	class Curve: public std::vector<CurvePoint> {
	public:
		bool loop;
		Curve(): loop() { }
		Curve::const_iterator next(Curve::const_iterator i) const
			{ return ++i != end() ? i : loop ? begin() : --i; }
		Curve::const_iterator prev(Curve::const_iterator i) const
			{ return --i != begin() ? i : loop ? end() : ++i; }
	};

protected:
	Curve curve;

	void put_segment(const Context &context, const Segment &segment, const Real width = 0);
	void put_curve(const Context &context, const Curve &curve, const Real width = 0);
	void draw_curve(const Context &context, const Curve &curve);
	
public:
	CurvesArea();
	void on_draw_content(const Context &context) override;
};


#endif