r3dm1ke

abstract class Chargeable {
    charge();    // Abstract method

    fastCharge() {
        print('Gotta go fast');
        charge();    // Call to child's implemented method
    }
}

r3dm1ke

// Creating a time duration of 1 minute
const oneMinute = Duration(minutes: 1);
// ...
Future<void> printWithDelay(String msg) async {
  // Wait for one minute
  await Future.delayed(oneMinute);
  print(msg);
}

r3dm1ke

class Task {

  // Class properties
  // Underscore makes them private
  String _name;
  bool _completed;

  // Default constructor
  // this syntax means that it will accept a value and set it to this.name
  Task(this._name);

r3dm1ke

// Importing the material library with common UI components
import 'package:flutter/material.dart';

// Entry point for our application
// It tells Flutter to run the app and use TODOApp widget as the entry point
void main() => runApp(TODOApp());

// The root widget for our app
// It is stateless, that is why it expends StatelessWidget
class TODOApp extends StatelessWidget {

r3dm1ke

import 'package:flutter/material.dart';
// Importing our Task class
import 'package:todo_app/task.dart';

void main() => runApp(TODOApp());

class TODOApp extends StatelessWidget {

  // Creating a list of tasks with some dummy values
  final List<Task> tasks = [

r3dm1ke

import 'package:flutter/material.dart';
import 'package:todo_app/task.dart';

void main() => runApp(TODOApp());

class TODOApp extends StatelessWidget {

  final List<Task> tasks = [
    Task('Do homework'),
    Task('Laundry'),

r3dm1ke

// The sole reason we keep this extra component is
// because runApp will only take a StatelessWidget as its argument
class TODOApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return TODO();
  }
}

// Here we are defining a StatefulWidget

r3dm1ke

import 'package:flutter/material.dart';
import 'package:todo_app/task.dart';

void main() => runApp(TODOApp());

class TODOApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return TODO();
  }

r3dm1ke

class TODOState extends State<TODO> {

  final List<Task> tasks = [];

  void onTaskCreated(String name) {
    setState(() {
      tasks.add(Task(name));
    });
  }
  

r3dm1ke

import 'package:flutter/material.dart';
import 'package:todo_app/task.dart';

class TODOList extends StatelessWidget {

  final List<Task> tasks;
  final onToggle;

  TODOList({@required this.tasks, @required this.onToggle});