Connect4GUI

import info.gridworld.grid.*;
import info.gridworld.actor.*;

/*
 * Connect4GUI simulates a graphical version of Connect 4. The GUI has a Grid of Actors 
 * and a Connect4Board.
 */
public class Connect4GUI
{
	private Grid<Actor> gr;
	private Connect4Board board;
	private ActorWorld world;
	
	//Constructs a new Connect4GUI object.
	public Connect4GUI()
	{ 
		gr = new BoundedGrid<Actor>(6, 6);
		board = new Connect4Board();
		world = new ActorWorld(gr);
	}
	
	//Returns ActorWorld world.
	public ActorWorld world()
	{ return world; }
	
	//Adds Player p's piece to column col on the grid.
	public Actor add(Player p, int col)
	{
		Location loc = new Location(getValidRow(p, col), col);
		Piece piece = p.getPiece();
		Actor a = gr.put(loc, piece);
		
//Checks whether or not a is a Blast object and if it is, the piece
//in that location is dropped down one more row after the adjacent pieces 
//have been blasted.
		if(a != null && a instanceof Blast)
		{
			a.act();
			Location loc2 = new Location(loc.getRow() + 1, loc.getCol());
			if(gr.isValid(loc2))
			{
				gr.put(new Location(loc.getRow()+1, loc.getCol()), p.getPiece());
				gr.remove(loc);
			}
			world.show();
			board.getBoard()[loc.getRow()][col] = null;
			if(board.isValid(loc.getRow() + 1, col))
				board.getBoard()[loc.getRow() + 1][col] = p.getPiece();
			else
				board.getBoard()[loc.getRow()][col] = p.getPiece();
		}
		else if(a != null)
			a.act();
		return a;
	}
	
	//Returns the row in which Player p's piece dropped to in column col, -1 if column 
//was full. Piece is also placed into the Connect4Board (text version).
	public int getValidRow(Player p, int col)
	{ return board.place(p.getPiece(), col); }
	
	//Returns Grid gr.
	public Grid<Actor> grid()
	{ return gr; }
	
	//Returns Connect4Board board.
	public Connect4Board board()
	{ return board; }
}