mchess-client/lib/chess/chess_square_outer_dragtarget.dart

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import 'package:flutter/material.dart';
import 'package:mchess/chess/chess_square_inner_draggable.dart';
import 'package:mchess/chess_bloc/chess_bloc.dart';
import 'package:mchess/chess_bloc/chess_events.dart';
import 'package:mchess/chess_bloc/promotion_bloc.dart';
import 'package:mchess/utils/chess_utils.dart';
class ChessSquareOuterDragTarget extends StatelessWidget {
final ChessCoordinate coordinate;
final ChessPiece containedPiece;
const ChessSquareOuterDragTarget(
{super.key,
required this.coordinate,
required this.containedPiece});
@override
Widget build(BuildContext context) {
return DragTarget<PieceDragged>(
onWillAccept: (move) {
if (move?.fromSquare == coordinate) {
return false;
}
return true;
},
onAccept: (pieceDragged) {
// Replace the dummy value with the actual target of the move.
pieceDragged.toSquare = coordinate;
if (isPromotionMove(pieceDragged)) {
var move = ChessMove(
from: pieceDragged.fromSquare, to: pieceDragged.toSquare);
PromotionBloc.getInstance().add(PawnMovedToPromotionField(
move: move, colorMoved: ChessBloc.myColor!));
} else if (coordinate != pieceDragged.fromSquare) {
ChessBloc.getInstance().add(OwnPieceMoved(
startSquare: pieceDragged.fromSquare,
endSquare: pieceDragged.toSquare,
piece: pieceDragged.movedPiece!));
}
},
builder: (context, candidateData, rejectedData) {
return ChessSquareInnerDraggable(
coordinate: coordinate,
containedPiece: containedPiece,
);
},
);
}
bool isPromotionMove(PieceDragged move) {
bool isPromotion = false;
if (move.movedPiece!.pieceClass != ChessPieceClass.pawn) {
return isPromotion;
}
switch (ChessBloc.myColor) {
case ChessColor.black:
if (move.toSquare.row == 1) {
isPromotion = true;
}
break;
case ChessColor.white:
if (move.toSquare.row == 8) {
isPromotion = true;
}
break;
case null:
break;
}
return isPromotion;
}
}