flutter_redurx 1.0.0+1

Flutter-ReduRx Build Status

Flutter bindings for ReduRx.

It provides a Provider as an InheritedWidget so you can reach the ReduRx Store wherever you have a BuildContext.
It also has a Connect Widget so you can grab a few parts of the State (sub-state/props) and it will automatically recall builder whenever only this little connected part of the State has changed preventing unnecessary rebuilds.

Getting started #


Connect #

  • convert: State -> Props - A function used by map to transform the state in a sub-state/props.
  • where: Props oldProps, Props newProps -> bool - A function to explicitly filter when the builder should be called.
  • builder: Props newProps -> Widget - A function that receives the sub-state/props and returns a Widget.
Connect<State, String>(
  convert: (state) => state.title,
  where: (oldTitle, newTitle) => newTitle != oldTitle,
  builder: (title) => Text(title),
Handling null values #

By default, Connect will only call [builder] if the props aren't [null], otherwise it renders an empty [Container]. If you want to handle null values by youself, set the nullable property to [true]:

Connect<State, String>(
  convert: (state) => state.title,
  where: (oldTitle, newTitle) => newTitle != oldTitle,
  builder: (title) => Text(title),
  nullable: true,

Provider #

  • store - A ReduRx Store.
  • child - Your application's Widget.
  • static dispatch<S>(BuildContext, ActionType) - Helper to call dispatch on the Provider's context Store.
  store: Store<State>(State('Initial title')),
  child: App(),
Provider.dispatch<State>(context, ChangeTitle('New title'));

For a better understanding of dispatch and ActionType head to ReduRx.

Example #

import 'package:flutter/material.dart' hide State;
import 'package:flutter_redurx/flutter_redurx.dart';

class State {
  State({this.title, this.count});
  final String title;
  final int count;

class Increment extends Action<State> {
  State reduce(State state) =>
      State(title: state.title, count: state.count + 1);

void main() {
  final store =
      Store<State>(State(title: 'Flutter-ReduRx Demo Title', count: 0));
  runApp(Provider(store: store, child: MyApp()));

class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter-ReduRx Demo',
      theme: ThemeData(
        primarySwatch: Colors.pink,
      home: MyHomePage(),

class MyHomePage extends StatelessWidget {
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Connect<State, String>(
            convert: (state) => state.title,
            where: (prev, next) => next != prev,
            builder: (title) => Text(title ?? ''),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text('You have pushed the button this many times:'),
              Connect<State, String>(
                convert: (state) => state.count.toString(),
                where: (prev, next) => next != prev,
                builder: (count) => Text(count ?? '',
                    style: Theme.of(context).textTheme.display1),
        floatingActionButton: FloatingActionButton(
          onPressed: () => Provider.dispatch<State>(context, Increment()),
          tooltip: 'Increment',
          child: Icon(Icons.add),

[1.0.0] - 2018-12-17

  • Stable and documented API.

[0.4.3] - 2018-10-03

  • Connect accepts null values by the explicit set of the nullable attribute.

[0.4.2] - 2018-08-06

  • Added @required annotations.


flutter_redurx_example #

A new Flutter project.

Getting Started #

For help getting started with Flutter, view our online documentation.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  flutter_redurx: ^1.0.0+1

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:flutter_redurx/flutter_redurx.dart';
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Learn more about scoring.

We analyzed this package on Jul 11, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.4.0
  • pana: 0.12.19
  • Flutter: 1.7.8+hotfix.3


Detected platforms: Flutter

References Flutter, and has no conflicting libraries.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0 <3.0.0
flutter 0.0.0
redurx ^1.0.0 1.1.1
Transitive dependencies
collection 1.14.11
meta 1.1.6 1.1.7
rxdart 0.20.0 0.22.0
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies