State management for Flutter.

Motivation

Most of the time, I don't need all the features in GetX. Based on my experience, I extracted these frequently used functions and made some changes.

Features

• All Rx types from GetX(RxInt, RxList..)
• Obx from GetX
• ViewModel that observes Widget life circle (onInit, onReady, onClose)

Usage

1. Without state (No need to declare a VMState)

   class HomePage extends Vmx<HomeViewModel> {
     const HomePage({this.initialValue = 0});
      
     final int initialValue;
      
     @override
     HomeViewModel createViewModel() => HomeViewModel();
      
     @override
     Widget build(context, vm) {
       return Scaffold(
         appBar: AppBar(title: const Text('Hello StatyX')),
         floatingActionButton: FloatingActionButton(
             onPressed: () => vm.counter.value++, child: const Icon(Icons.add)),
         body: Center(child: Obx(() => Text('${vm.counter.value}'))),
       );
     }
   }
   

2. With state (access vm everywhere in the VMState)

   class HomePage extends StatefulWidget {
      const HomePage({this.initialValue = 0});
      
      final int initialValue;
      
      @override
      State<HomePage> createState() => _HomePageState();
   }
      
   class _HomePageState extends VMState<HomePage, HomeViewModel> {
      @override
      ViewModel createViewModel() => HomeViewModel();
      
      @override
      Widget build(BuildContext context) {
         return Scaffold(
            appBar: AppBar(title: const Text('Hello StatyX')),
            floatingActionButton: FloatingActionButton(
                    onPressed: () => vm.counter.value++, child: const Icon(Icons.add)),
            body: Center(child: Obx(() => Text('${vm.counter.value}'))),
         );
      }
   }
   

• ViewModel

   class HomeViewModel extends ViewModel<HomePage> {
     final counter = 0.obs;
     
     @override
     void onInit() {
       super.onInit();
       counter.value = widget.initialValue;
     }
   }