Flutter - undefined name of class parameter

Question

I'm having difficulties in this part of my code. It looks preety simple, however there is one thing I just don't understand. This is my class, it looks rather basic:

class _ChangePageItem extends StatelessWidget {
  final String label;
  final bool isActive;
  final int pageIndex;
  final Function handlePagination;

  _ChangePageItem(this.label, this.isActive, this.pageIndex, this.handlePagination);
  @override
  Widget build(BuildContext context) {
    return Container(
      width: 35.0,
      height: 35.0,
      margin: EdgeInsets.only(right: 10.0),
      decoration: BoxDecoration(
        border: Border.all(
          width: 1.0,
          color: Colors.grey,
          style: BorderStyle.solid,
        ),
      ),
      child: RaisedButton(
        color: Colors.white,
        child: Text('$label'),
        onPressed:
            isActive ? () => handlePagination(int.parse('${label}')) : null,
      ),
    );
  }
}

then I'm using this class in the same file:

return Row(
  mainAxisAlignment: MainAxisAlignment.end,
  children: [
    _ChangePageItem(label, isActive, pageIndex, handlePagination),
    paginationsItems(), _PaginationItem(label: '>')],
);

This is the error that I'm getting:

Adding value doesn't help:

you can't use named parameters like in the second image. But where you create the variable 'label' in the first image? — Siloé Bezerra Bispo
– Siloé Bezerra Bispo, Commented Nov 16, 2020 at 14:27

Er1 · Accepted Answer · 2020-11-16 14:31:49Z

1

You should call the constructor like this, or using your own variables:

return Row(
  mainAxisAlignment: MainAxisAlignment.end,
  children: [
    _ChangePageItem('A String', true, 0, (){}),
    paginationsItems(), _PaginationItem(label: '>')],
);

answered Nov 16, 2020 at 14:31

Er1

2,8221 gold badge16 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Flutter - undefined name of class parameter

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related