calorimeter/lib/enter_food_widget.dart

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

class EnterFoodWidget extends StatefulWidget {
  final Function(BuildContext context, FoodEntry entry) onAdd;

  const EnterFoodWidget({super.key, required this.onAdd});

  @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"),
        keyboardType: TextInputType.number,
        controller: kcalPerMassController);

    var enterButton = ElevatedButton(
        style: ElevatedButton.styleFrom(
          padding: EdgeInsets.zero,
        ),
        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,
              kcalPerMass: kcalPerMassAsNumber);

          widget.onAdd(context, entry);
        },
        child: const Icon(Icons.add));

    return Padding(
      padding: const EdgeInsets.only(left: 8.0, right: 4.0),
      child: RowWidget(
        nameWidget,
        massWidget,
        kcalPerMassWidget,
        null,
        enterButton,
      ),
    );
  }
}