calorimeter/lib/enter_food_widget.dart

import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:kalodings/food_entry_bloc.dart';

class EnterFoodWidget extends StatefulWidget {
  const EnterFoodWidget({
    super.key,
  });

  @override
  State<EnterFoodWidget> createState() => _EnterFoodWidgetState();
}

class _EnterFoodWidgetState extends State<EnterFoodWidget> {
  String perFoodresult = "dings";
  TextEditingController nameController = TextEditingController();
  TextEditingController massController = TextEditingController();
  TextEditingController kcalPerMassController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    var nameWidget = TextField(
      decoration: const InputDecoration(hintText: "Name"),
      controller: nameController,
    );

    var massWidget = TextField(
      decoration: const InputDecoration(hintText: "Menge"),
      keyboardType: TextInputType.number,
      controller: massController,
    );

    var kcalPerMassWidget = TextField(
        decoration: const InputDecoration(hintText: "kcal pro 100g"),
        controller: kcalPerMassController);

    return Column(
      children: [
        RowWidgetWithSpacers(
          nameWidget,
          massWidget,
          kcalPerMassWidget,
        ),
        Padding(
          padding: const EdgeInsets.all(8.0),
          child: ElevatedButton(
              child: const Text("Hinzufügen"),
              onPressed: () {
                double massAsNumber = 0.0;
                double kcalPerMassAsNumber = 0.0;

                try {
                  massAsNumber =
                      double.parse(massController.text.replaceAll(",", "."));
                } catch (e) {
                  var snackbar = const SnackBar(
                      content: Text("Menge muss eine Zahl sein"));
                  ScaffoldMessenger.of(context).clearSnackBars();
                  ScaffoldMessenger.of(context).showSnackBar(snackbar);
                  return;
                }

                try {
                  kcalPerMassAsNumber = double.parse(
                      kcalPerMassController.text.replaceAll(",", "."));
                } catch (e) {
                  var snackbar = const SnackBar(
                      content: Text("'kcal pro 100g' muss eine Zahl sein"));
                  ScaffoldMessenger.of(context).clearSnackBars();
                  ScaffoldMessenger.of(context).showSnackBar(snackbar);
                  return;
                }
                try {
                  massAsNumber =
                      double.parse(massController.text.replaceAll(",", "."));
                } catch (e) {
                  var snackbar = const SnackBar(
                      content: Text("Menge muss eine Zahl sein"));
                  ScaffoldMessenger.of(context).clearSnackBars();
                  ScaffoldMessenger.of(context).showSnackBar(snackbar);
                  return;
                }

                var entry = FoodEntry(
                    name: nameController.text,
                    mass: massAsNumber,
                    kcal: kcalPerMassAsNumber,
                    kcalPerMass: 200);
                context.read<FoodEntryBloc>().add(FoodEntryEvent(entry: entry));
              }),
        ),
      ],
    );
  }
}

class RowWidgetWithSpacers extends StatefulWidget {
  final Widget widget1;
  final Widget widget2;
  final Widget widget3;

  const RowWidgetWithSpacers(this.widget1, this.widget2, this.widget3,
      {super.key});

  @override
  State<RowWidgetWithSpacers> createState() => _RowWidgetWithSpacersState();
}

class _RowWidgetWithSpacersState extends State<RowWidgetWithSpacers> {
  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        const Spacer(flex: 1),
        Expanded(flex: 4, child: widget.widget1),
        Expanded(
          flex: 4,
          child: widget.widget2,
        ),
        Expanded(flex: 4, child: widget.widget3),
        const Spacer(flex: 1),
      ],
    );
  }
}