/**
 *  Direction.java
 *  CIS 260
 *  David Klick
 *  2012-03-09
 *  
 *  This enum is designed to provide an enumerated
 *  set of directions for the Maze project. It has
 *  enhancements that specify where that direction
 *  goes in a grid, what the opposite direction is,
 *  and provides an initial for that direction.
 *  
 *  @author David Klick
 *  @version 1.0 2012-03-09
 */

public enum Direction {
    NORTH (-1, 0),
    EAST (0, 1),
    SOUTH (1, 0),
    WEST (0, -1);
    public final int deltaRow;
    public final int deltaCol;
    Direction(int deltaR, int deltaC) {
        deltaRow = deltaR;
        deltaCol = deltaC;
    }
    public Direction opposite() {
        Direction d = null;
        switch (this) {
            case NORTH: d = SOUTH; break;
            case SOUTH: d = NORTH; break;
            case EAST: d = WEST; break;
            case WEST: d = EAST; break;
        }
        return d;
    }
    public String toString() {
        String s = null;
        switch (this) {
            case NORTH: s = "N"; break;
            case EAST: s = "E"; break;
            case SOUTH: s = "S"; break;
            case WEST: s = "W"; break;
        }
        return s;
    }
}