#ifndef _INPUT_H_
#define _INPUT_H_

#include <stdlib.h>
#include <GL/glut.h>

#include "structs.h"

class Input {
    public:

        static inline Input* getInstance() {
            return & m_instance;
        }

        GLvoid keyboard_event(GLubyte key, GLint x, GLint y);
        GLvoid menu( int value );
        GLvoid passive_motion(GLint mx, GLint my);
        GLvoid button_motion(GLint mx, GLint my);
        GLvoid mouse_button(GLint btn, GLint state, GLint mx, GLint my);

        enum {
            ZOOM_IN_EVENT,
            ZOOM_OUT_EVENT,
            ANIMATE_EVENT,
            LINES_EVENT,
            FULL_EVENT
        };

    private:
        
        inline Input() {;}
        
        static Input m_instance;

        Point oldPoint;
        
        void calcAngle(GLfloat *newMatrix, GLfloat angle, Point& a);
        void scalePoint(Point& p, GLint mx, GLint my);

};

#endif