cpd/lib/widgets/listview.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:cpd/model/habit_list.dart';

class MyListView extends StatelessWidget {
  const MyListView({Key? key});

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      shrinkWrap: true,
      padding: EdgeInsets.zero,
      itemCount: habits.length,
      itemBuilder: (BuildContext context, int index) {
        return Padding(
          padding: const EdgeInsets.symmetric(vertical: 5, horizontal: 10),
          child: Card(
            color: index % 2 == 0 ? Colors.green[300] : Colors.green[100],
            child: Dismissible(
              key: Key(habits[index].title),
              background: Container(
                color: Colors.blue,
                alignment: Alignment.centerLeft,
                child: const Padding(
                  padding: EdgeInsets.only(left: 16),
                  child: Icon(Icons.edit),
                ),
              ),
              secondaryBackground: Container(
                color: Colors.red,
                alignment: Alignment.centerRight,
                child: const Padding(
                  padding: EdgeInsets.only(right: 16),
                  child: Icon(Icons.delete),
                ),
              ),
              onDismissed: (direction) {
                // Löschen
                if (direction == DismissDirection.endToStart) {
                  ScaffoldMessenger.of(context).showSnackBar(
                      SnackBar(content: Text("${habits[index].title} was dismissed"))
                  );
                  // Hier wird das Element aus der Liste entfernt
                  habits.removeAt(index);

                  // Ausgabe der aktualisierten Liste zur Kontrolle
                  print('Current list:');
                  habits.forEach((habit) {
                    print('${habit.title}: ${habit.subtitle}');
                  });
                }
                // Bearbeiten
                else if(direction == DismissDirection.startToEnd) {
                  //muss noch implementiert werden
                }
              },
              child: ListTile(
                title: Text(habits[index].title),
                subtitle: Text(habits[index].subtitle ?? ''),
                trailing: habits[index].icon,
                leading: Checkbox(
                  value: habits[index].isComplete,
                  onChanged: (value) {
                    if (value == false) {
                      print("decrease counter");
                    } else {
                      print("increase counter");
                    }
                  },
                ),
              ),
            ),
          ),
        );
      },
    );
  }
}