private bool PieceCanMoveInDirection(CheckerPiece piece, MoveDirection direction)
{
return(piece.IsKing ||
direction == MoveDirection.ForwardLeft ||
direction == MoveDirection.ForwardRight
);
}
public static CheckerPiece AsKing(int row, int col, PieceColor owner)
{
var piece = new CheckerPiece(row, col, owner);
piece.IsKing = true;
return(piece);
}
/// <summary>
/// Places a piece on the board. Note: This does not
/// take in the actual piece object to ensure that we never end up
/// with other places being able to modify the pieces on the board.
/// </summary>
/// <param name="color">color of the piece</param>
/// <param name="row">row the piece will be placed</param>
/// <param name="col">column the piece will be placed</param>
public void AddPiece(PieceColor color, int row, int col, bool isKing = false)
{
var piece = new CheckerPiece(row, col, color);
piece.IsKing = isKing;
AddPiece(piece);
}
public void MakeMove(Move move)
{
if (IsValidMove(move))
{
_board.RemovePiece(move.Piece);
int newRow = move.Piece.Row;
int newCol = move.Piece.Col;
foreach (MoveDirection direction in move.Direction)
{
newRow += MoveUtil.GetRowMoveAmountByColor(move.Piece.Owner, direction);
newCol += MoveUtil.GetColMoveAmount(direction);
CheckerPiece pieceInPosition = _board.GetPiece(newRow, newCol);
if (pieceInPosition != null)
{
_board.RemovePiece(pieceInPosition);
newRow += MoveUtil.GetRowMoveAmountByColor(move.Piece.Owner, direction);
newCol += MoveUtil.GetColMoveAmount(direction);
}
}
var pieceAfterMove = new CheckerPiece(move.Piece);
pieceAfterMove.Row = newRow;
pieceAfterMove.Col = newCol;
_board.AddPiece(pieceAfterMove);
}
else
{
throw new ArgumentException("Invalid Move");
}
}
public Move(CheckerPiece piece, MoveDirection direction)
{
this.Piece = piece;
this.Direction = new List <MoveDirection> {
direction
};
}
public void AddPiece(CheckerPiece piece)
{
//if (!TileIsInBounds(row, col) || (boardState[row, col] != null))
// throw new ArgumentException(String.Format("Error: Piece was attempted to be placed at invalid position Row: {0}, Col: {1}", row, col));
var copyOfPiece = new CheckerPiece(piece);
boardState[copyOfPiece.Row, copyOfPiece.Col] = copyOfPiece;
}
public void UpdateDisplay(CheckerBoard board)
{
for (int row = 0; row < CheckerBoard.SIZE; row++)
{
for (int col = 0; col < CheckerBoard.SIZE; col++)
{
CheckerPiece tile = board.GetPiece(row, col);
string tileRep = GetTileDisplayRepresentationWithPadding(tile);
_display.DisplayText(tileRep);
}
_display.DisplayText($"{Environment.NewLine}");
}
}
private static string GetTileDisplayRepresentationWithPadding(CheckerPiece piece)
{
if (piece == null)
{
return("- ");
}
else if (piece.Owner == PieceColor.Black)
{
return(piece.IsKing ? "B* " : "B ");
}
else
{
return(piece.IsKing ? "W* " : "W ");
}
}
/// <summary>
/// Returns a deep copy
/// of the current board
/// flipped about the the x-axis.
/// </summary>
/// <returns></returns>
public CheckerBoard FlipBoard()
{
var reversedBoard = new CheckerBoard();
for (int i = 0; i < SIZE; i++)
{
int row = SIZE - i - 1;
for (int j = 0; j < SIZE; j++)
{
CheckerPiece pieceToCopy = boardState[row, j];
if (pieceToCopy != null)
{
reversedBoard.AddPiece(pieceToCopy.Owner, i, j);
}
}
}
return(reversedBoard);
}
private void StartDrag(MouseEventArgs e)
{
IsDragging = true;
CheckerPiece src;
if (e.Source.GetType() == typeof(RedChecker))
{
src = (RedChecker)e.Source;
}
else
{
src = (BlackChecker)e.Source;
}
currentPiece = src;
DataObject data = new DataObject(System.Windows.DataFormats.Text.ToString(), "abcd");
DragDropEffects de = DragDrop.DoDragDrop(this.grdBoard, data, DragDropEffects.All);
IsDragging = false;
}
//public bool MakeMove(Move move)
//{
//PieceColor thisColor = move.Piece.Owner;
//if (!GetLegalMoves(thisColor).Contains(move))
// return false;
//var tempBoard = (move.Piece.Owner == PieceColor.White) ? FlipBoard() : boardState;
//var opposingColor = Piece.GetOppositeColor(move.Piece.Owner);
//int rowMove = GetRowMoveAmount(move.Direction);
//int colMove = GetColMoveAmount(move.Direction);
//if (TileCanBeJumped(move.Piece.Row + rowMove, move.Piece.Col + colMove, opposingColor, boardState, move.Direction))
//{
// // move piece two times further
// // capture opposing piece
// // check that piece can't jump again
// if (PieceCanJump(move.Piece, opposingColor, boardState))
// {
// // get move from player to jump
// }
//}
//else
//{
// // move piece
//}
//return true;
//}
public List <Move> GetLegalMoves(PieceColor player)
{
PieceColor opposingColor = CheckerPiece.GetOppositeColor(player);
CheckerBoard boardToCheck = this;
var legalMoves = new List <Move>();
for (int i = 0; i < SIZE; i++)
{
for (int j = 0; j < SIZE; j++)
{
var piece = boardToCheck.GetPiece(i, j);
if ((piece == null) || (piece.Owner == opposingColor))
{
continue;
}
var moves = new BoardMoveGenerator(boardToCheck, piece.Row, piece.Col).Moves;
legalMoves.AddRange(moves);
}
}
return(legalMoves);
}
public CheckerPiece(CheckerPiece copy) : this(copy.Row, copy.Col, copy.Owner)
{
IsKing = copy.IsKing;
}
/// <summary>
/// Here, the source is the drop target which in this case is a Label. This is needed to get
/// a reference to the underlying grid cell. That way we know the cell to which to add the new
/// image.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void grdBoard_Drop(object sender, DragEventArgs e)
{
// use the label in the cell to get the current row and column
EmptySpace l = e.Source as EmptySpace;
int r = Grid.GetRow((EmptySpace)e.Source);
int c = Grid.GetColumn((EmptySpace)e.Source);
bool okToMove = false;
// Because both RedChecker and BlackChecker derive from CheckerPiece, we can use polymorphism
// to create the correct piece. Get the correct piece and determine if the move is valid.
// A valid move is one row forward to an unoccupied space.
CheckerPiece checker;
if (currentPiece is RedChecker)
{
if (currentTurn != Turn.Red)
{
System.Windows.Forms.MessageBox.Show("It's not your turn");
return; // it's not your turn.
}
// It's red's turn...
checker = new RedChecker();
if (l.row == currentPiece.row + 1 && (l.col == currentPiece.col + 1 || l.col == currentPiece.col - 1))
{
okToMove = true;
}
//now check to see if we captured anything
BlackChecker opponentPiece;
if (c == currentPiece.col + 2)
{
opponentPiece = grdBoard.Children.OfType <BlackChecker>().Where(p => p.row == currentPiece.row + 1 && (p.col == currentPiece.col + 1)).SingleOrDefault();
}
else
{
opponentPiece = grdBoard.Children.OfType <BlackChecker>().Where(p => p.row == currentPiece.row + 1 && (p.col == currentPiece.col - 1)).SingleOrDefault();
}
if (opponentPiece != null && l.row - currentPiece.row == 2)
{
int validCol = (opponentPiece.col > currentPiece.col) ? currentPiece.col + 2 : currentPiece.col - 2;
if (r == currentPiece.row + 2 && c == validCol)
{
Storyboard PieceCaptured = opponentPiece.Resources["PieceCaptured"] as Storyboard;
capturedPiece = opponentPiece;
if (PieceCaptured != null)
{
PieceCaptured.Completed += new EventHandler(RemovePiece);
PieceCaptured.Begin();
}
okToMove = true;
}
}
if (okToMove)
{
currentTurn = Turn.Black;
}
}
else
{
if (currentTurn != Turn.Black)
{
System.Windows.Forms.MessageBox.Show("It's not your turn");
return; // it's not your turn.
}
// It's black's turn...
checker = new BlackChecker();
if (l.row == currentPiece.row - 1 && (l.col == currentPiece.col + 1 || l.col == currentPiece.col - 1))
{
okToMove = true;
}
RedChecker opponentPiece = null;
if (c == currentPiece.col + 2)
{
opponentPiece = grdBoard.Children.OfType <RedChecker>().Where(p => p.row == currentPiece.row - 1 && (p.col == currentPiece.col + 1)).SingleOrDefault();
}
else if (c == currentPiece.col - 2)
{
opponentPiece = grdBoard.Children.OfType <RedChecker>().Where(p => p.row == currentPiece.row - 1 && (p.col == currentPiece.col - 1)).SingleOrDefault();
}
//FIXME: capturing a piece to the left isn't working
if (opponentPiece != null && currentPiece.row - l.row == 2)
{
int validCol = (opponentPiece.col > currentPiece.col) ? currentPiece.col + 2 : currentPiece.col - 2;
if (r == currentPiece.row - 2 && c == validCol)
{
capturedPiece = opponentPiece;
Storyboard PieceCaptured = opponentPiece.Resources["PieceCaptured"] as Storyboard;
if (PieceCaptured != null)
{
PieceCaptured.Completed += new EventHandler(RemovePiece);
PieceCaptured.Begin();
}
okToMove = true;
}
}
if (okToMove)
{
currentTurn = Turn.Red;
}
}
if (okToMove)
{
checker.col = c;
checker.row = r;
// bind the mouse events
checker.PreviewMouseLeftButtonDown += new MouseButtonEventHandler(grdBoard_PreviewMouseLeftButtonDown);
checker.PreviewMouseMove += new MouseEventHandler(grdBoard_PreviewMouseMove);
checker.Cursor = Cursors.Hand;
checker.AllowDrop = false;
// add the piece to the board
Grid.SetRow(checker, r);
Grid.SetColumn(checker, c);
this.grdBoard.Children.Remove(currentPiece);
grdBoard.Children.Add(checker);
Storyboard DropPiece = checker.Resources["DropPiece"] as Storyboard;
if (DropPiece != null)
{
DropPiece.Begin();
}
}
}
public void RemovePiece(CheckerPiece piece)
{
RemovePiece(piece.Row, piece.Col);
}
public static bool TileIsOpposingColor(this CheckerBoard board, int row, int col, PieceColor opposingColor)
{
CheckerPiece piece = board.GetPiece(row, col);
return((piece != null) && (piece.Owner == opposingColor));
}
public Move(CheckerPiece piece, IEnumerable <MoveDirection> direction)
{
this.Piece = piece;
this.Direction = direction.ToList();
}