Android Open Source - Open-Chess Pawn

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Back to project page Open-Chess.

License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright 2013 Baris Sencan (baris.sencan@me.com)
 */*from  w w w .  j  a va 2 s . c  o 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.bsencan.openchess.model.Board;
import com.bsencan.openchess.model.Move;
import com.bsencan.openchess.model.Piece;

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

  public Pawn(int x, int y, boolean isWhite) {
    super(x, y, isWhite, isWhite ? "white-pawn" : "black-pawn");
    this.canCaptureWithMove = false;

    /* Add valid moves. */
    this.validMoves.add(new Move(0, 1, false));
    this.validMoves.add(new Move(0, 2, false));

    /* Add capture-only moves. */
    this.captureOnlyMoves.add(new Move(1, 1, false));
    this.captureOnlyMoves.add(new Move(-1, 1, false));
  }

  @Override
  public void moved() {
    Board board = (Board) this.getParent();
    int x = (int) this.getX();
    int y = (int) this.getY();

    /* Ensure pawns can move 2 tiles forward the first time only. */
    if (this.validMoves.size == 2) {
      this.validMoves.pop();
    }

    /* Pawn promotion. */
    if ((this.isWhite && (y == 7)) || (!this.isWhite && (y == 0))) {
      board.removePieceAt(x, y);
      board.addPiece(new Queen(x, y, this.isWhite));
    }
  }
}

Java Source Code List