private bool IsValidMove(pieceName sourcePieceType, int destinationY, int destinationX) // determine if the piece is able to move to its target square
{
int sourceY = PieceDetails.FindCoordinate(selectedpiece.Location.Y);
int sourceX = PieceDetails.FindCoordinate(selectedpiece.Location.X);
switch (sourcePieceType)
{
case pieceName.Pawn:
Pawn pawn = new Pawn(board, sourceY, sourceX, destinationY, destinationX, History, turn);
return(pawn.Move(board));
case pieceName.Rook:
Rook rook = new Rook(board, sourceY, sourceX, destinationY, destinationX, History, turn);
return(rook.Move(board));
case pieceName.Knight:
Knight knight = new Knight(board, sourceY, sourceX, destinationY, destinationX, History, turn);
return(knight.Move(board));
case pieceName.Bishop:
Bishop bishop = new Bishop(board, sourceY, sourceX, destinationY, destinationX, History, turn);
return(bishop.Move(board));
case pieceName.Queen:
Queen queen = new Queen(board, sourceY, sourceX, destinationY, destinationX, History, turn);
return(queen.Move(board));
default:
King king = new King(board, sourceY, sourceX, destinationY, destinationX, History, turn);
return(king.Move(board));
}
}
private bool MovePiece(PictureBox destination) // moving a piece to eat another piece
{
pieceName sourcePieceType = turn ? PieceDetails.selectedWhitePiece(selectedpiece.Name) : PieceDetails.selectedBlackPiece(selectedpiece.Name);
int destinationY = PieceDetails.FindCoordinate(destination.Location.Y);
int destinationX = PieceDetails.FindCoordinate(destination.Location.X);
return(IsValidMove(sourcePieceType, destinationY, destinationX));
}
private void board_Click(object sender, EventArgs e) // when selected piece move to empty square
{
if (currentState != gameState.Checkmate && currentState != gameState.Stalemate && (PvP || PvE))
{
if (alreadySelected)
{
Point position = Cursor.Position;
position = panel.PointToClient(position);
int destinationY = PieceDetails.FindCoordinate(position.Y);
int destinationX = PieceDetails.FindCoordinate(position.X);
if (MovePiece(destinationY, destinationX))
{
resetHighlightedPieces();
completeTurn();
AIMove();
}
else
{
MessageBox.Show("Invalid Move, please try again.");
}
}
}
}
private void clickWhite(object sender, EventArgs e)
{
if (currentState != gameState.Checkmate && currentState != gameState.Stalemate && (PvP || PvE))
{
if (alreadySelected && !turn) // when black piece eats white black piece
{
if (MovePiece((PictureBox)sender))
{
panel.Refresh();
selectedpiece.BackColor = Color.Transparent;
foreach (PictureBox p in PossiblePieceToTake)
{
p.BackColor = Color.Transparent;
}
PossiblePieceToTake = new List <PictureBox>();
completeTurn();
AIMove();
}
else
{
MessageBox.Show("Invalid Move, please try again.");
}
}
else if (turn && selectedpiece != (PictureBox)sender) // selecting white piece
{
resetHighlightedPieces();
selectedpiece = (PictureBox)sender;
selectedpiece.BackColor = Color.FromArgb(220, 13, 86, 212);
alreadySelected = true;
pieceName sourcePieceType = PieceDetails.selectedWhitePiece(selectedpiece.Name);
int Y = PieceDetails.FindCoordinate(selectedpiece.Location.Y);
int X = PieceDetails.FindCoordinate(selectedpiece.Location.X);
DisplayPossibleMoves dpm = new DisplayPossibleMoves(panel.CreateGraphics(), Color.FromArgb(125, 48, 118, 240));
dpm.DisplayMoves(Y, X, board, PossiblePieceToTake, turn, sourcePieceType);
}
}
}