private static string GetPieceCode(PieceView Piece)
{
if (Piece is Pawn)
{
return("");
}
else if (Piece is Queen)
{
return("Q");
}
else if (Piece is Bishop)
{
return("B");
}
else if (Piece is Knight)
{
return("N");
}
else if (Piece is Rook)
{
return("R");
}
else if (Piece is King)
{
return("K");
}
else
{
throw new InvalidOperationException("Invalid Piece type: " + Piece.GetType().Name);
}
}
private bool IsPossibleMove(PieceView piece, int x, int y)
{
if (x < 0 || y < 0 || x > 7 || y > 7)
{
return(false);
}
var existing = GetPieceOn(x, y);
if (existing != null)
{
if (existing.Color == piece.Color)
{
return(false);
}
if (piece is Pawn && piece.X == existing.X)
{
return(false);
}
if (existing is King)
{
return(false);
}
}
return(true);
}
public void DrawPiece(PieceView piece)
{
var image = UIImage.FromFile(string.Format("figures/{0}-{1}.png", piece.Color.ToString().ToLowerInvariant(), piece.GetType().Name.ToLowerInvariant()));
piece.Image = image;
piece.Frame = new RectangleF(GetX(piece.X), GetY(piece.Y), CellWidth, CellWidth);
piece.CurrentFrame = piece.Frame;
Add(piece);
}
public void DrawPiece(PieceView piece)
{
var image = UIImage.FromFile(string.Format("figures/{0}-{1}.png", piece.Color.ToString().ToLowerInvariant(), piece.GetType().Name.ToLowerInvariant()));
piece.Image = image;
piece.Frame = new RectangleF(GetX(piece.X), GetY(piece.Y), CellWidth, CellWidth);
piece.CurrentFrame = piece.Frame;
Add(piece);
}
private void CleanupAfterDrop(PieceView piece)
{
foreach (var highlight in highlights)
{
highlight.RemoveFromSuperview();
}
highlights.Clear();
if (piece != null)
{
piece.Frame = piece.CurrentFrame;
}
}
private void HighlightPossibleMoves(PieceView piece)
{
var moves = piece.GetMoves();
foreach (var move in moves)
{
if (!IsPossibleMove(piece, move.Item1, move.Item2))
{
continue;
}
var highlight = new UIView();
highlight.BackgroundColor = UIColor.LightGray;
highlight.Frame = new RectangleF(GetX(move.Item1), GetY(move.Item2), CellWidth, CellWidth);
Add(highlight);
SendSubviewToBack(highlight);
highlights.Add(highlight);
}
}
private static string GetPieceCode(PieceView Piece)
{
if (Piece is Pawn)
return "";
else if (Piece is Queen)
return "Q";
else if (Piece is Bishop)
return "B";
else if (Piece is Knight)
return "N";
else if (Piece is Rook)
return "R";
else if (Piece is King)
return "K";
else
throw new InvalidOperationException("Invalid Piece type: " + Piece.GetType().Name);
}
private bool IsPossibleMove(PieceView piece, int x, int y)
{
if (x < 0 || y < 0 || x > 7 || y > 7)
return false;
var existing = GetPieceOn(x, y);
if (existing != null) {
if (existing.Color == piece.Color)
return false;
if (piece is Pawn && piece.X == existing.X)
return false;
if (existing is King)
return false;
}
return true;
}
private void HighlightPossibleMoves(PieceView piece)
{
var moves = piece.GetMoves();
foreach (var move in moves)
{
if (!IsPossibleMove(piece, move.Item1, move.Item2))
continue;
var highlight = new UIView();
highlight.BackgroundColor = UIColor.LightGray;
highlight.Frame = new RectangleF(GetX(move.Item1), GetY(move.Item2), CellWidth, CellWidth);
Add(highlight);
SendSubviewToBack(highlight);
highlights.Add(highlight);
}
}
private void CleanupAfterDrop(PieceView piece)
{
foreach (var highlight in highlights)
highlight.RemoveFromSuperview();
highlights.Clear();
if (piece != null)
piece.Frame = piece.CurrentFrame;
}
