private void RebindState()
{
// Rebind the possible moves, now that the board has changed.
PossibleMoves = new HashSet <ChessMove>(
from ChessMove m in mBoard.GetPossibleMoves()
select m
);
// Update the collection of squares by examining the new board state.
var newSquares = BoardPosition.GetRectangularPositions(8, 8);
int i = 0;
foreach (var pos in newSquares)
{
var piece = mBoard.GetPieceAtPosition(pos);
mSquares[i].ChessPiece = piece;
if (piece.PieceType == ChessPieceType.King && mBoard.IsCheck && piece.Player == mBoard.CurrentPlayer)
{
mSquares[i].IsInCheck = true;
}
else
{
mSquares[i].IsInCheck = false;
}
mSquares[i].IsSelected = false;
i++;
}
mCurrentlySelected = null;
OnPropertyChanged(nameof(BoardAdvantage));
OnPropertyChanged(nameof(CurrentPlayer));
OnPropertyChanged(nameof(CanUndo));
}
private void Border_MouseUp(object sender, MouseButtonEventArgs e)
{
Border b = sender as Border;
var square = b.DataContext as ChessSquare;
var vm = FindResource("vm") as ChessViewModel;
foreach (var move in vm.PossibleMoves)
{
if (move.StartPosition == square.Position)
{
//if the seleceted square is not the same as before
if (selectedSquare != null && selectedSquare.Position != square.Position)
{
selectedSquare.IsSelected = false;
}
//initialize selectedSquare
selectedSquare = square;
square.IsHighlighted = true;
square.IsSelected = true;
}
}
//if there is a selected square,
if (selectedSquare != null && selectedSquare.Position != square.Position)
{
vm.ApplyMove(selectedSquare.Position, square.Position);
selectedSquare.IsSelected = false;
selectedSquare = null;
}
}
private void Border_HoverMouseEnter(object sender, MouseEventArgs e)
{
if (!this.IsEnabled)
{
return;
}
Border b = sender as Border;
var square = b.DataContext as ChessSquare;
hovered_square = square;
var vm = FindResource("vm") as ChessViewModel;
foreach (var move in vm.PossibleMoves)
{
if (selected_square != null && move.StartPosition.Equals(selected_square.Position) && move.EndPosition.Equals(square.Position))
{
square.IsHovered = true;
}
/* else if(selected_square != null && selected_square.IsSelected == false && move.EndPosition.Equals(square.Position))
* square.IsHovered = true;*/
else if (selected_square != null && selected_square.IsSelected == false && move.StartPosition.Equals(square.Position))
{
square.IsHovered = true;
}
}
}
private async void Border_MouseUp(object sender, MouseButtonEventArgs e)
{
if (!IsEnabled)
{
return;
}
Border b = sender as Border;
var square = b.DataContext as ChessSquare;
var vm = FindResource("vm") as ChessViewModel;
if (vm.PossibleStartMoves.Contains(square.Position))
{
if (selectedSquare != null) // If it's selected
{
selectedSquare.IsSelected = false; // Then unselect it
}
square.IsHighlighted = false; // unhighlight current square
square.IsSelected = true; // select current square
selectedSquare = square; // reset field to square we just clicked
}
else if (selectedSquare != null)
{
if (square.IsHighlighted)
{
//if move is pawn promote
// open pawn promote window
if ((square.Position.Row == 0 || square.Position.Row == 7) && selectedSquare.Player.PieceType == ChessPieceType.Pawn)
{
var panel = new PawnPromote(vm, selectedSquare.Position, square.Position);
panel.Show();
}
else
{
IsEnabled = false;
selectedSquare.IsSelected = false;
await vm.ApplyMove(square.Position, selectedSquare.Position, "");
selectedSquare = null;
IsEnabled = true;
}
}
}
if (!vm.PossibleStartMoves.Contains(square.Position))
{
if (selectedSquare != null)
{
selectedSquare.IsSelected = false;
selectedSquare = null;
}
}
}
public ChessSquare FindKingSquareInCheck()
{
ChessSquare chessSquare = null;
foreach (ChessSquare square in mSquares)
{
if (square.IsInCheck)
{
chessSquare = square;
}
}
return(chessSquare);
}
public ChessViewModel()
{
mBoard = new ChessBoard();
// Initialize the squares objects based on the board's initial state.
mSquares = new ObservableCollection <ChessSquare>(
BoardPosition.GetRectangularPositions(8, 8)
.Select(pos => new ChessSquare()
{
Position = pos,
ChessPiece = mBoard.GetPieceAtPosition(pos)
})
);
PossibleMoves = new HashSet <ChessMove>(
from ChessMove m in mBoard.GetPossibleMoves()
select m
);
mCurrentlySelected = null;
}
private void Border_LeftClickDown(object sender, MouseEventArgs e)
{
if (!this.IsEnabled)
{
return;
}
if (selected_square != null)
{
selected_square.IsSelected = false;
}
Border b = sender as Border;
var square = b.DataContext as ChessSquare;
selected_square = square;
var vm = FindResource("vm") as ChessViewModel;
if (vm.CurrentPlayer.Equals(square.Chess_Piece.Player))
{
square.IsSelected = true;
}
}
private async void Border_MouseUp(object sender, MouseButtonEventArgs e)
{
Border b = sender as Border;
var square = b.DataContext as ChessSquare;
ChessSquare possibleSelectedSquare;
var vm = FindResource("vm") as ChessViewModel;
mIsSelected = !mIsSelected; //toggling selected
if (mIsSelected)
{
possibleSelectedSquare = square;
square.IsSelected = true;
mSelectedSquare = square;
}
else if (vm.IsPossibleEndPosition(mSelectedSquare.Position, square.Position))
{
if (mSelectedSquare.Piece.PieceType == Model.ChessPieceType.Pawn && (square.Position.Row == 0 || square.Position.Row == 7))//promotion
{
var promotionWindow = new PromotionWindow(vm, mSelectedSquare.Position, square.Position);
promotionWindow.ShowDialog();
}
else if (vm.CanEnable)
{
vm.CanEnable = false;
await vm.ApplyMove(mSelectedSquare.Position, square.Position, Model.ChessPieceType.Empty);
vm.CanEnable = true;
}
square.IsHighlighted = true;
mSelectedSquare.IsSelected = false;
}
else
{
mIsSelected = false;
mSelectedSquare.IsSelected = false;
}
}
private async void Border_MouseUp(object sender, MouseButtonEventArgs e)
{
Border b = sender as Border;
var square = b.DataContext as ChessSquare;
var vm = FindResource("vm") as ChessViewModel;
//only select squares that are possible start positions from all possible moves
if (vm.PossibleStartPositions.Contains(square.Position))
{
//if no square has been selected currently, select the clicked square
if (selectedSquare == null)
{
square.IsSelected = true;
selectedSquare = square;
}
//if a square is already select, determine if the same square or a different square is clicked
else
{
//if the same square is clicked, deselect the square
if (selectedSquare == square)
{
square.IsSelected = false;
selectedSquare = null;
}
//if a different square is clicked, delselect the previous square and select the new one
else
{
//Fix Applied: Need to deselect before changing selectedSquare
selectedSquare.IsSelected = false;
//if (square.IsHighlighted)
//{
// vm.ApplyMove(square.Position);
// selectedSquare = null;
//}
//else
//{
square.IsSelected = true;
selectedSquare = square;
//}
}
}
//square.IsSelected = (square.IsSelected) ? false:true;
}
else
{
//if the square that is not a starting position of possible move is selected, deselect the previous square
if (selectedSquare != null)
{
selectedSquare.IsSelected = false;
//True if square is ending position of possible move
if (square.IsHighlighted)
{
vm.StartBoardPosition = selectedSquare.Position;
//Check if move is pawn promotion
if (vm.GetPieceAtPosition(vm.StartBoardPosition).PieceType == ChessPieceType.Pawn &&
((vm.CurrentPlayer == 1 && vm.StartBoardPosition.Row == 1) ||
(vm.CurrentPlayer == 2 && vm.StartBoardPosition.Row == 6)))
{
PromotionWindow promoteWin = new PromotionWindow(vm, vm.StartBoardPosition, square.Position);
promoteWin.ShowDialog();
//ChessPieceType checker = vm.PromotedPiece;
}
//else
//{
Window parentWindow = Window.GetWindow(this);
parentWindow.IsEnabled = false;
this.IsEnabled = false;
//Apply Move needs to have an extra param to take PieceType for the pawn to promote to
await vm.ApplyMove(square.Position);
parentWindow.IsEnabled = true;
this.IsEnabled = true;
//}
}
selectedSquare = null;
}
}
}
private bool IncomingSelectionIsValidChessPiece(ChessSquare square)
{
var possibleStartPositions = GetPossibleMovesByStartPosition(square);
return(possibleStartPositions.Any());
}
private IEnumerable <ChessMove> GetPossibleMovesByStartPosition(ChessSquare square)
{
return(from ChessMove m in ChessViewModel.PossibleMoves
where m.StartPosition.Equals(square.Position)
select m);
}