// This utility function will move a piece from the selected square to the target square.
// It will return any chess piece that was captured from the target square.
public AbstractChessPiece MoveChessPiece(ChessSquare selectedSquare, ChessSquare clickedSquare)
{
// save any piece that is on the target square
AbstractChessPiece capturedPiece = clickedSquare.ChessPiece;
// move the piece from the original square to the target square
clickedSquare.SetChessPiece(selectedSquare.ChessPiece);
// mark the chess piece as having been moved, in case the piece needs to know (e.g. Pawn)
selectedSquare.ChessPiece.HasMoved = true;
// remove the chess piece from the original square
selectedSquare.RemoveChessPiece();
// Unselect the currently selected square
selectedSquare.Unselect();
// return the captured piece, if any (or null if no piece was captured)
return(capturedPiece);
}
// The student should complete this function.
// This method contains all of the game logic to handle user click events.
private void handleClick(ChessSquare clickedSquare)
{
// If there is no piece there then...
if (selectedSquare == null)
{
// If the square they want to move to has a piece then...
if (clickedSquare.ChessPiece != null)
{
// If the piece is one of the players, then stop
if (clickedSquare.ChessPiece.Player != currentPlayer)
{
return;
}
selectedSquare = clickedSquare;
selectedSquare.Select();
}
}
// If the click the square again, then unselect
else if (selectedSquare == clickedSquare)
{
selectedSquare.Unselect();
selectedSquare = null;
}
// Otherwise...
else
{
// If there is a piece there...
if (clickedSquare.ChessPiece != null)
{
// If the piece is the players, then stop
if (clickedSquare.ChessPiece.Player == currentPlayer)
{
selectedSquare.Unselect();
selectedSquare = clickedSquare;
selectedSquare.Select();
return;
}
}
// If they can't move there, stop
if (selectedSquare.ChessPiece.CanMoveToLocation(clickedSquare.Col, clickedSquare.Row, gameBoard) == false)
{
return;
}
// Otherwise...
else
{
// If the player trys to kill themself, yell at them
if (gameBoard.TestMoveForCheck(currentPlayer, selectedSquare, clickedSquare))
{
MessageBox.Show("You are still in check!");
return;
}
AbstractChessPiece capturedPiece = gameBoard.MoveChessPiece(selectedSquare, clickedSquare);
selectedSquare = null;
// If the piece was captured, tell the player
if (capturedPiece != null)
{
capturedPiece.ToString();
MessageBox.Show(capturedPiece.ToString() + " was captured");
}
changePlayer();
// If the king is in danger, yell at the player
if (gameBoard.IsInCheck(currentPlayer))
{
MessageBox.Show("Check!");
}
}
}
}