flutter_stateless_chessboard

Description:

flutter stateless chessboard

flutter_stateless_chessboard #
A Stateless Chessboard Widget for Flutter. This package provides just the chessboard. The game logic can be implemented using chess library. Check example/main.dart file, for implementing game logic.

Using the Chessboard #
To use Chessboard widget, add flutter_stateless_chessboard as a dependency in your pubspec.yaml
Simple Example #
void main() {
runApp(
new MaterialApp(
home: Scaffold(
body: Center(
child: Chessboard(
size: 300,
fen: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
onMove: (move) {
// optional
// TODO: process the move
print("move from ${move.from} to ${move.to}");
},
orientation: BoardColor.BLACK, // optional
lightSquareColor: Color.fromRGBO(240, 217, 181, 1), // optional
darkSquareColor: Color.fromRGBO(181, 136, 99, 1), // optional
),
),
),
),
);
}

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Handling Promotion #
For handling promotion. You can implement onPromote param. And return the PieceType you want to promote to. See below example.
Chessboard(
fen: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
size: 400,
onMove: ...,
onPromote: () {
return showDialog<PieceType>(
context: context,
builder: (_) {
return AlertDialog(
title: Text('Promotion'),
content: Column(
mainAxisSize: MainAxisSize.min,
children: [
ListTile(
title: Text("Queen"),
onTap: () => navigator.pop(PieceType.QUEEN),
),
ListTile(
title: Text("Rook"),
onTap: () => navigator.pop(PieceType.ROOK),
),
ListTile(
title: Text("Bishop"),
onTap: () => navigator.pop(PieceType.BISHOP),
),
ListTile(
title: Text("Knight"),
onTap: () => navigator.pop(PieceType.KNIGHT),
),
],
),
);
},
);
},
);
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Building Custom Pieces #
By default, library uses chess_vectors_flutter for pieces. But you can build your own piece widget by implementing buildPiece param. See below example.
Chessboard(
fen: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
size: 400,
buildPiece: (piece, size) {
if (piece == Piece.WHITE_PAWN) {
return Icon(
Icons.person,
size: size,
color: Colors.white,
);
} else if (piece == Piece.BLACK_PAWN) {
return Icon(
Icons.person,
size: size,
color: Colors.black,
);
}
},
);
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If you don't return widget for a PieceType default widget will be rendered. This is how the above Chessboard will look.

Parameters #
fen: #
fen that should be show on the board (example rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1)
size: #
Size of the chessboard widget
onMove (optional): #
Called when a move is made on the board. Passing a ShortMove(from, to, promotion).
orientation (optional): #
Specify orientation of the chessboard.
lightSquareColor (optional): #
color of light square on chessboard.
darkSquareColor (optional): #
color of dart square on chessboard.
onPromote (optional): #
handle piece promotion
buildPiece (optional): #
handle building of custom piece