public void PerformMove(BoardPosition piece, MainWindow.Surround move)
{
BoardPosition swappingPiece;
switch (move)
{
case MainWindow.Surround.Top:
swappingPiece = this.TopOf(piece);
break;
case MainWindow.Surround.Right:
swappingPiece = this.RightOf(piece);
break;
case MainWindow.Surround.Bottom:
swappingPiece = this.BottomOf(piece);
break;
case MainWindow.Surround.Left:
swappingPiece = this.LeftOf(piece);
break;
default:
throw new ArgumentOutOfRangeException("move");
}
if (swappingPiece == null)
{
return;
}
var movePiecePosition = piece.ArrayPosition;
var swappingPosition = swappingPiece.ArrayPosition;
swappingPiece.ArrayPosition = movePiecePosition;
piece.ArrayPosition = swappingPosition;
this[swappingPiece.ArrayPosition.Y, swappingPiece.ArrayPosition.X] = swappingPiece;
this[piece.ArrayPosition.Y, piece.ArrayPosition.X] = piece;
}
private IEnumerable <BoardPosition> GetBoardPieces(IVirtualBoard board, BoardPosition piece, MainWindow.Surround direction)
{
Func <BoardPosition, BoardPosition> dir = p =>
{
switch (direction)
{
case MainWindow.Surround.Top:
return(board.TopOf(p));
case MainWindow.Surround.Right:
return(board.RightOf(p));
case MainWindow.Surround.Bottom:
return(board.BottomOf(p));
case MainWindow.Surround.Left:
return(board.LeftOf(p));
default:
throw new ArgumentOutOfRangeException("direction");
}
};
var borderingPiece = dir(piece);
if (borderingPiece != null && borderingPiece.Piece.RootBoardPiece == piece.Piece.RootBoardPiece)
{
yield return(borderingPiece);
var borderingPiece2 = dir(borderingPiece);
if (borderingPiece2 != null && borderingPiece2.Piece.RootBoardPiece == piece.Piece.RootBoardPiece)
{
yield return(borderingPiece2);
}
}
}