Purpose

Easy to use awesome package Riverpod for some design pattern
I created this package to use Riverpod's Provider like the ListView and PageView widgets that are implemented in the Flutter standard.We believe that someone with experience in Flutter development can handle it easily.

View (builder)

  @override
  Widget build(BuildContext context) {
    // wrap this buider 
    return RiverpodBuilder(
      // set use provider
      provider: firstViewModelProvider,
      builder: (context, ref, vm, state, reader) {
        return Scaffold(
          appBar: AppBar(
            title: const Text('First View'),
            automaticallyImplyLeading: false,
          )
          ...

arguments

name	mean
provider	riverpod provider
builder	use it like a ListView or PageView
showlog	setting whether to display the Log

builder property

name	mean
context	means Build Context
ref	means WidgetRef
vm (notifier)	ref.watch(provider.notifier);
state	ref.watch(provider);
reader	ref.read(provider.notifier);

log

View Model

class FirstViewModel extends BaseViewModel<FirstViewState> {
  @override
  get instanse => const FirstViewState();

  int get count => state.count;

  // listen other provider
  SecondViewModel get secondVM =>
      widgetRef.read(secondViewModelProvider.notifier);

  @override
  void onInit() async{
    // Asynchronous processing is also possible .
    await Future.delayed(const Duration(seconds: 1));
    super.onInit();
  }

  void addCount() {
    state = state.copyWith(count: state.count + 1);
  }

  void showNextView() {
    // has context(Build Context)
    // no arguments need to be passed.
    Navigator.of(context).pushNamed("second_view");
  }

  ...

property

name	mean
context	means Build Context
ref	means PrividerRef
widgetRef	means WidgetRef
state	this state

method

name	mean
onInit	call when this class init. (Asynchronous processing is also possible)
onDispose	call when this class close.
refreshProvider	use invalidate(refresh) other provider.

Preview

Status of support Providers type

※ This package requires Riverpod 2 or higher.

corresponding

builder	provider type	BaseVM
RiverpodBuilder	NotifierProvider	BaseViewModel
KeepRiverpodBuilder	AutoDisposeNotifierProvider	KeepBaseViewModel

currently we offer two types of builder.
We plan to increase the types of providers supported and adapte to hooks in the near future.

supplementary information

We know that many people use stateNotifierProvier in this case.
However, since the Riverpod developers recommend the use of NotifierProvider, we decided to be the first to respond.

Extended package

Extending this package is very easy.
ex : The case where you want to define common Methods that you want to use in all VM...

• In that case, create an extension class for InnerViewModel after defining other providers..

import 'package:fluttertoast/fluttertoast.dart';

extension InnerViewModelEXT on InnerViewModel {

  // OverlayLoadingView.provider = provider to manage loading

  bool get isLoading => providerRef.read(OverlayLoadingView.provider);

  // show Loading
  void showLoading() {
    providerRef.read(OverlayLoadingView.provider.notifier).show();
  }

  // hide Loading
  void hideLoading() {
    providerRef.read(OverlayLoadingView.provider.notifier).hide();
  }

  void showAlert(String message) {
    // alert method
  }

  void showToast(String message) {
    // other packages can be defined and used here as well.
    Fluttertoast.showToast(
        msg: message, toastLength: Toast.LENGTH_SHORT, timeInSecForIosWeb: 1);
  }
}

---

Writing Documents more detail...