private void updateSelectionSquare()
{
//special case to draw the selected square if there is one
if (selectionMade)
{
dgv_chessBoard[selectedX, selectedY].Value = Chess.Properties.Resources.BlueSquare; //Highlights the selected object
}
else
{
ChessPiece updatePiece = chessBoard[selectedX, selectedY];
displayPieceAt(updatePiece.PositionX, updatePiece.PositionY, updatePiece.Type(), updatePiece.Colour);
}
//Make sure that we can't override what the main player is trying to select
if (!(opponentSelX == selectedX && opponentSelY == selectedY))
{
if (opponentSelMade)
{
dgv_chessBoard[opponentSelX, opponentSelY].Value = Chess.Properties.Resources.Orange; //Highlights the object the opponent is selecting
}
else
{
ChessPiece updatePiece = chessBoard[opponentSelX, opponentSelY];
displayPieceAt(updatePiece.PositionX, updatePiece.PositionY, updatePiece.Type(), updatePiece.Colour);
}
}
}
//Returns true if the piece is a king or rook
public static bool isCastling(ChessPiece firstPiece, ChessPiece secondPiece, ChessPiece[,] chessBoard)
{
bool retVal = false;
//Check that we're dealing with a King and a Rook, and that they're the same colour
if (((firstPiece.Type() == chessPieces.KING && secondPiece.Type() == chessPieces.ROOK) ||
(secondPiece.Type() == chessPieces.KING && firstPiece.Type() == chessPieces.ROOK)) &&
secondPiece.Colour == firstPiece.Colour)
{
//Check that the pieces can Castle
if (firstPiece.CanCastle && secondPiece.CanCastle)
{
bool emptySpace = true;
//check that there is empty space between the king and rook
int max;
int min;
if (firstPiece.PositionX > secondPiece.PositionX)
{
max = firstPiece.PositionX;
min = secondPiece.PositionX;
}
else
{
max = secondPiece.PositionX;
min = firstPiece.PositionX;
}
for (int i = min + 1; i < max; i++)
{
if (chessBoard[i, firstPiece.PositionY].Type() != chessPieces.CLEAR)
{
emptySpace = false;
}
}
if (emptySpace)
{
retVal = true;
}
}
}
return(retVal);
}