grid.java

一个java的游戏程序

import java.awt.*;
import java.awt.event.*;

/**
 * Creates a representation of the board for the games and keeps track
 * of the neighbouring fields and if any token occupy them, it tells
 * the field View and Field Controller where the tokens are on the
 * board, so they can depict it
 */
class Grid
{
    GridCell _border;
    GridCell _cell[][];
    
    private int _width;
    private int _height;

    /**
     * Constructor that sets a tokens neighbours and sets up the empty board
     * representation
     */
    public Grid(int width, int height, GridCellFactory factory)
    {
	_width = width;
	_height = height;
	createGridCells(factory);
        setNeighbours();
	clear();
    }

    /**
     * This creates the board representation with the correct number of fields
     * for the game and starts a new field view and a field controller
     */
    public void createGridCells(GridCellFactory factory)
    {
	_cell = new GridCell[_width][_height];
	for(int v = 0; v < _height; v++)
	    for(int h = 0; h < _width; h++)
		_cell[h][v] = factory.create();
        _border = factory.create();
        _border.setBorder();
    }

    public GridCell getCell(int h, int v)
    {
	if (0 <= h && h <= _width && 0 <= v && v <= _height)
	    return _cell[h][v];
	else
	    return null;
    }

    /**
     * Finds the neighbouring fields of a field
     */
    public void setNeighbours()
    {
        for(int h = 0; h < _width; h++)
            for(int v = 0; v < _height; v++)
		for(int d = 0; d < 8; d++)
		    _cell[h][v].setNeighbour(d, getNeighbour(h,v,d));
    }
    
    /**
     * Gets the neighbouring field in a particular direction taken in as the last
     * parameter. The two first parameters are the position of the field in the
     * array that symolizes the board
     */
    public GridCell getNeighbour(int h, int v, int direction)
    {
	
	if(direction == Direction.NORTH) v--; 
	else if(direction == Direction.SOUTH) v++; 
	else if(direction == Direction.NORTHWEST) {v--; h--; }
	else if(direction == Direction.SOUTHEAST) {v++; h++; }
	else if(direction == Direction.NORTHEAST) {v--; h++; }
	else if(direction == Direction.SOUTHWEST) {v++; h--; }
	else if(direction == Direction.WEST) h--; 
	else if(direction == Direction.EAST) h++; 
	else System.out.println("getNeighbour: wrong direction\n");

        if(h < 0 || h >= _width || v < 0 || v >= _height)
            return _border;
        else 
	    return _cell[h][v];
    }

    /**
     * Clears all the fields
     */
    public void clear()
    {
	for(int v = 0; v < _height; v++)
	    for(int h = 0; h < _width; h++)
		_cell[h][v].clear();
    }

}