rrousselGit

class Something with ChangeNotifier {
  bool hasCompletedSomething;
}

class SomethingElse with ChangeNotifier {
  bool hasCompletedSomething;
}

class Loading {
  Loading(this.value);

rrousselGit

class WaitUntilFutureProvider<T> extends SingleChildStatefulWidget {
  const WaitUntilFutureProvider({
    Key key,
    this.waitUntil,
    this.create,
    Widget child,
  }) : super(key: key, child: child);

  final bool Function(BuildContext) waitUntil;
  final Create<Future<T>> create;

rrousselGit

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';

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

// Mimicking the behavior of VSyncProvider through a global variable
TickerProvider vsync;

rrousselGit

import 'package:flutter/material.dart';

/// A customizable low level widget with some default value
/// Default to have a red background
class SomeBaseWidget extends StatelessWidget {
  const SomeBaseWidget({
    Key key,
    this.color = Colors.red,
    this.child,
  }) : super(key: key);

rrousselGit

extension AsValueListenable<T> on Stream<T> {
  /// Converts a [Stream] to a [ValueListenable]
  ///
  /// The internal [StreamSubscription] is cancelled when
  /// all listeners added to [ValueListenable] are removed.
  /// Keep this in mind as this could cause issues with
  /// single-subscription streams.
  ValueListenable<T> asValueListenable(T initialValue) {
    return _StreamValueListenable(this, initialValue);
  }

rrousselGit

final todosFamily = ProviderFamily<Todo, int>((ref, id) {
  return Todo(
    id: '$id',
    description: 'Todo $id',
  );
});

final currentTodo = Provider<Todo>((ref) => null);

class List extends StatelessWidget {

rrousselGit

import 'package:flutter/material.dart';

// This example showcases how by using functions instead of StatelessWidgets,
// this can cause bugs when using InheritedWidgets

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

class MyApp extends StatelessWidget {
  @override
  Widget build(context) {

rrousselGit

import 'package:flutter/material.dart';

// This example showcases how extracting widgets into StatelessWidgets
// instead of functions can improve performances, by rebuilding
// only what needs to update when the state changes

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

class MyApp extends StatelessWidget {
  @override

rrousselGit

import 'package:flutter/material.dart';

// This example showcases how, by using functions over classes,
// this _can_ break features such as AnimatedSwitcher

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

class MyApp extends StatelessWidget {
  @override
  Widget build(context) {

rrousselGit

void main() async {
  // Iterate only over the first 5 items
  await for (final value in counter().take(5)) {
    print('$value');
  }
}

// Emits an incrementing value every seconds
Stream<int> counter() async* {
  print('start');