// Square class

//
// single square block which moves around the grid
// by the keys and stops when it lands above an occupied grid square

#ifndef SQUARE_H
#define SQUARE_H
#include "gp142display.h"

enum Direction {LEFT,RIGHT,DOWN,ERROR};


// Square class -- this is a single square on the screen
class Square {
public:
	// default constructor
	Square();

	// constructor
	Square(GP142Display *display, Grid *grid, int x, int y);

	// copy constructor
	Square(const Square &source);
	
	// operator=
	Square &operator=(const Square &other);

	// initialize or assign the square the values passed
	void squareInit(GP142Display *display, Grid *grid, int x, int y);

	// get x coordinate of square
	int getX() const;

	// get y coordinate of square
	int getY() const;


	// true if the square can move over one square in direction d
	bool canMove(Direction d) const;

	// move square in direction d if possible
	void Move(Direction d);

	// draw rectangle of pixels corresponding to square at
	// grid location (x,y)
	void Draw(GP142Color color);

private:
	int x,y;				// corresponding grid location of square
	bool ableToMove;		// true if the square can still move (isn't frozen)
	GP142Display *display;	// screen graphics are drawn on
	Grid *grid;				// grid that this square is a part of
};


#endif