Non-Scrollable GridView-ish Widget

grid.dart

class Grid extends StatelessWidget {
  const Grid({
    Key? key,
    required this.children,
    this.columns,
    this.rows,
    this.space = 10,
    this.mainAxisAlignment = MainAxisAlignment.start,
    this.crossAxisAlignment = CrossAxisAlignment.center,
  })  : assert(
          (columns != null && rows == null) ||
              (rows != null && columns == null),
          "Either columns XOR rows specifieds",
        ),
        super(key: key);

  final List<Widget> children;
  final int? columns;
  final int? rows;
  final double space;

  final MainAxisAlignment mainAxisAlignment;
  final CrossAxisAlignment crossAxisAlignment;

  @override
  Widget build(BuildContext context) {
    int _columns = columns ?? (children.length / rows!).ceil();
    int _rows = rows ?? (children.length / columns!).ceil();

    return Column(
      mainAxisAlignment: MainAxisAlignment.start,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: List<Widget>.generate(
        _rows,
        (r) => Row(
          mainAxisAlignment: mainAxisAlignment,
          crossAxisAlignment: crossAxisAlignment,
          children: List<Widget>.generate(
            _columns,
            (c) => children[c + (r * _columns)],
          ).intertwineWith(
            SizedBox(
              width: space,
            ),
          ),
        ),
      ).intertwineWith(
        SizedBox(
          height: space,
        ),
      ),
    );
  }
}