cpd_2022_energy/lib/widgets/MyInputWidget.dart

import 'package:energy_bilance/models/EnergyBilanceModel.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';

class MyInputWidget extends StatelessWidget {
  const MyInputWidget({super.key});

  @override
  Widget build(BuildContext context) {

    final model = Provider.of<EnergyBilanceModel>(context);

      return Column(
          children: [
            Row(
              mainAxisSize: MainAxisSize.min,
              mainAxisAlignment: MainAxisAlignment.start,

              children: [
                Expanded(
                    child: TextFormField(
                      keyboardType: TextInputType.number,
                      inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
                      onChanged: (value) {
                        double number = double.parse(value);
                        model.setStartVelocity(number);
                      },
                      validator: (value) {
                        if(value == null){
                          return null;
                        }
                        final number = num.tryParse(value);
                        if(number == null){
                          return '"$value" ist keine Zahl';
                        }
                        return null;
                      },
                      decoration: const InputDecoration(
                          labelText: 'Anfangsgeschwindigkeit',
                          hintText: 'in m/s'
                      ),
                    )
                ),
                Expanded(
                    child: TextFormField(
                      keyboardType: TextInputType.number,
                      inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
                      onChanged: (value) {
                        double number = double.parse(value);
                        model.setEndVelocity(number);
                      },
                      decoration: const InputDecoration(
                          labelText: 'Endgeschwindigkeit',
                          hintText: 'in m/s'
                      ),
                    )
                ),
            ],
          ),
            Row(
              mainAxisSize: MainAxisSize.max,
              mainAxisAlignment: MainAxisAlignment.spaceBetween,

              children: [
                Expanded(
                    child: TextFormField(
                      keyboardType: TextInputType.number,
                      inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
                      onChanged: (value) {
                        double number = double.parse(value);
                        model.setStartHeight(number);
                      },
                      decoration: const InputDecoration(
                          labelText: 'Anfangshöhe',
                          hintText: 'in m'
                      ),
                    )
                ),
                Expanded(
                    child: TextFormField(
                      keyboardType: TextInputType.number,
                      inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
                      onChanged: (value) {
                        double number = double.parse(value);
                        model.setEndHeight(number);
                      },
                      decoration: const InputDecoration(
                          labelText: 'Endhöhe',
                          hintText: 'in m'
                      ),
                    )
                ),
              ],
            ),
            Expanded(
                child: TextFormField(
                  keyboardType: TextInputType.number,
                  inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
                  onChanged: (value) {
                    double? number = double.tryParse(value);
                    if(number != null){
                      model.setWeight(number);
                    }
                  },
                  decoration: const InputDecoration(
                      labelText: 'Gewicht',
                      hintText: 'in kg'
                  ),
                )
            ),

      ]
      );

  }

}