Android Open Source - Open-Chess King

From Project

Back to project page Open-Chess.

License

The source code is released under:

Apache License

If you think the Android project Open-Chess listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/*
 * Copyright 2013 Baris Sencan (baris.sencan@me.com)
 */*from   w ww  .  ja v a  2  s  .co m*/
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS"
 * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

package com.bsencan.openchess.model.pieces;

import com.badlogic.gdx.utils.Array;
import com.bsencan.openchess.model.Board;
import com.bsencan.openchess.model.Move;
import com.bsencan.openchess.model.Piece;
import com.bsencan.openchess.model.Tile;

/**
 * Represents a king chess piece. See {@link Piece}.
 * 
 * @author Baris Sencan
 */
public class King extends Piece {

  private boolean moved;

  public King(int x, int y, boolean isWhite) {
    super(x, y, isWhite, isWhite ? "white-king" : "black-king");

    /* Add valid moves. */
    this.validMoves.add(new Move(0, 1, false));
    this.validMoves.add(new Move(1, 1, false));
    this.validMoves.add(new Move(1, 0, false));
    this.validMoves.add(new Move(1, -1, false));
    this.validMoves.add(new Move(0, -1, false));
    this.validMoves.add(new Move(-1, -1, false));
    this.validMoves.add(new Move(-1, 0, false));
    this.validMoves.add(new Move(-1, 1, false));
  }

  @Override
  public Array<Tile> getValidMoveTiles(Board board, boolean checkFriendly) {
    Array<Tile> tiles = super.getValidMoveTiles(board, checkFriendly);
    int x = (int) this.getX();
    int y = (int) this.getY();

    /* Show castling moves if available. */
    if (!this.moved) {

      if ((board.getPieceAt(x + 1, y) == null)
          && (board.getPieceAt(x + 2, y) == null)) {
        this.validMoves.add(new Move(2, 0, false));
      }

      if ((board.getPieceAt(x - 1, y) == null)
          && (board.getPieceAt(x - 2, y) == null)
          && (board.getPieceAt(x - 3, y) == null)) {
        this.validMoves.add(new Move(-2, 0, false));
      }
    }
    return tiles;
  }

  @Override
  public void moved() {
    int x = (int) this.getX();

    /* Handle castling move. */
    if (!this.moved) {
      this.moved = true;

      if ((x == 6) || (x == 2)) {
        Board board = (Board) this.getParent();
        int y = (int) this.getY();
        Piece rook = (x == 2) ? board.getPieceAt(0, y) : board
            .getPieceAt(7, y);

        if ((rook == null) || !(rook instanceof Rook)) {
          return;
        }

        if ((x == 2) && (board.getPieceAt(1, y) == null)
            && (board.getPieceAt(3, y) == null)) {
          board.relocatePieceAt(0, y, 3, y);
        } else if ((x == 6) && (board.getPieceAt(5, y) == null)) {
          board.relocatePieceAt(7, y, 5, y);
        }
      }
    }
  }

}

Java Source Code List