cpd_2022_energy/lib/widgets/ExpandedNumberInputWidget.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

class ExpandedNumberInputWidget extends StatelessWidget {

  String _labelDisplayText = "";
  String _hintText = "";
  void Function(double) _setValue = (x) => {};

  ExpandedNumberInputWidget(String labelDisplayText, String hintText, void Function(double) setValue, {super.key}) {
    _labelDisplayText = labelDisplayText;
    _hintText = hintText;
    _setValue = setValue;
  }

  @override
  Widget build(BuildContext context) {
    return Expanded(
        child: TextFormField(
          keyboardType: TextInputType.number,
          inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
          onChanged: (value) {
            double? number = double.tryParse(value);
            if (number == null){
              ScaffoldMessenger.of(context).showSnackBar(
                const SnackBar(content: Text('Bitte eine gültige Zahl eingeben')),
              );
            }else{
              ScaffoldMessenger.of(context).clearSnackBars();
              _setValue(number);
            }
          },
          decoration: InputDecoration(
              labelText: _labelDisplayText,
              hintText: _hintText,
          ),
        )
    );
  }

}