easytodo/lib/pages/home_page.dart

import 'package:flutter/material.dart';
import 'package:hive_flutter/hive_flutter.dart';
import '../data/database.dart';
import '../util/dialog_box.dart';
import '../util/todo_tile.dart';

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

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  // reference the hive box
  final _myBox = Hive.box('mybox');
  ToDoDataBase db = ToDoDataBase();

  @override
  void initState() {
    // if this is the 1st time ever openin the app, then create default data
    if (_myBox.get("TODOLIST") == null) {
      db.createInitialData();
    } else {
      // there already exists data
      db.loadData();
    }

    super.initState();
  }

  // text controller
  final _controller = TextEditingController();

  // checkbox was tapped
  void checkBoxChanged(bool? value, int index) {
    setState(() {
      db.toDoList[index][1] = !db.toDoList[index][1];
    });
    db.updateDataBase();
  }

  // save new task
  void saveNewTask() {
    setState(() {
      db.toDoList.add([_controller.text, false]);
      _controller.clear();
    });
    Navigator.of(context).pop();
    db.updateDataBase();
  }

  // create a new task
  void createNewTask() {
    showDialog(
      context: context,
      builder: (context) {
        return DialogBox(
          controller: _controller,
          onSave: saveNewTask,
          onCancel: () => Navigator.of(context).pop(),
        );
      },
    );
  }

  // delete task
  void deleteTask(int index) {
    setState(() {
      db.toDoList.removeAt(index);
    });
    db.updateDataBase();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        backgroundColor: Colors.deepPurple,
        title:
            Row(mainAxisAlignment: MainAxisAlignment.spaceBetween, children: [
          const Text(
            "To-Do List",
            style: TextStyle(
              fontWeight: FontWeight.w500,
              color: Colors.white,
            ),
          ),
          IconButton(
              iconSize: 72,
              icon: const Icon(
                Icons.info,
                color: Colors.white,
                size: 30,
              ),
              onPressed: () {
                showDialog(
                    context: context,
                    builder: (BuildContext context) {
                      return const AlertDialog(
                        title: Text("About"),
                        content: Text("Made by Anuj K."),
                      );
                    });
              })
        ]),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: createNewTask,
        backgroundColor: Colors.deepPurple,
        child: const Icon(
          Icons.add,
          color: Colors.white,
        ),
      ),
      body: ListView.builder(
        itemCount: db.toDoList.length,
        itemBuilder: (context, index) {
          return ToDoTile(
            taskName: db.toDoList[index][0],
            taskCompleted: db.toDoList[index][1],
            onChanged: (value) => checkBoxChanged(value, index),
            deleteFunction: (context) => deleteTask(index),
          );
        },
      ),
    );
  }
}