/// <summary>
/// Handles the next button click.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="e">The mouse event.</param>
private void NextClick(Object sender, EventArgs e)
{
Int32 move = _pv[_pvIndex++];
_position.Make(move);
UpdateGuiState();
VisualPosition.Make(move);
}
/// <summary>
/// Handles a mouse up event in the main window. The selected piece
/// in the analysis control panel is set at the mouse position on the
/// board. This is an unusual thing to do, so this method has to
/// handle the nuances of position state itself.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="e">The mouse event.</param>
public void WindowMouseUpHandler(MouseEventArgs e)
{
if (_isSearching)
{
return;
}
Int32 square = VisualPosition.SquareAt(e.Location);
if (_selectedPiece == ArrowCode)
{
if (_selectedSquare == Position.InvalidSquare)
{
if (_position.Square[square] != Piece.Empty)
{
_selectedSquare = square;
}
}
else if (_selectedSquare == square)
{
_selectedSquare = Position.InvalidSquare;
}
else
{
Int32 initialSquare = _selectedSquare;
SetPieceAt(_position.Square[initialSquare], square);
SetPieceAt(Piece.Empty, initialSquare);
_selectedSquare = Position.InvalidSquare;
UpdatePosition(_position);
VisualPosition.Make(TMove.Create(_position, initialSquare, square));
}
}
else
{
SetPieceAt(_selectedPiece, square);
UpdatePosition(_position);
VisualPosition.Set(_position);
}
}
/// <summary>
/// Starts play between the two players on the current position for the game.
/// This method is non-blocking and does not modify the given position.
/// </summary>
/// <param name="p">The position to start playing from.</param>
private void Play(Position p)
{
Position position = p.DeepClone();
VisualPosition.Set(position);
_state = GameState.Ingame;
_waitForStop.Reset();
new Thread(new ThreadStart(() => {
while (true)
{
IPlayer player = (position.SideToMove == Colour.White) ? White : Black;
List <Int32> legalMoves = position.LegalMoves();
// Adjudicate checkmate and stalemate.
if (legalMoves.Count == 0)
{
if (position.InCheck(position.SideToMove))
{
_message = "Checkmate. " + Stringify.Colour(1 - position.SideToMove) + " wins!";
_state = player.Equals(White) ? GameState.BlackWon : GameState.WhiteWon;
}
else
{
_message = "Stalemate. It's a draw!";
_state = GameState.Draw;
}
}
// Adjudicate draw.
if (position.InsufficientMaterial())
{
_message = "Draw by insufficient material!";
_state = GameState.Draw;
}
if (player is IEngine && player.AcceptsDraw)
{
if (position.FiftyMovesClock >= 100)
{
_message = "Draw by fifty-move rule!";
_state = GameState.Draw;
}
if (position.HasRepeated(3))
{
_message = "Draw by threefold repetition!";
_state = GameState.Draw;
}
}
// Consider game end.
if (_state != GameState.Ingame)
{
_waitForStop.Set();
return;
}
// Get move from player.
Position copy = position.DeepClone();
Int32 move = player.GetMove(copy);
if (!position.Equals(copy))
{
Terminal.WriteLine("Board modified!");
}
// Consider game stop.
if (_state != GameState.Ingame)
{
_waitForStop.Set();
return;
}
// Make the move.
position.Make(move);
VisualPosition.Make(move);
_moves.Add(move);
_types.Add(player.GetType());
}
}))
{
IsBackground = true
}.Start();
}
