mvvm 0.1.6

A Flutter MVVM. It uses property-based data binding to establish a connection between the ViewModel and the View, and drives the View changes through the ViewModel.

A Flutter MVVM (Model-View-ViewModel) implementation. It uses property-based data binding to establish a connection between the ViewModel and the View, and drives the View changes through the ViewModel.

一个 Flutter 的 MVVM(Model-View-ViewModel) 实现。 它使用基于属性 (property) 的数据绑定在视图模型 (ViewModel) 与视图 (View) 之间建立关联，并通过视图模型 (ViewModel) 驱动视图 (View) 变化。

Documentation & Example

import 'package:flutter/widgets.dart';
import 'package:mvvm/mvvm.dart';
import 'dart:async';

// ViewModel
class Demo1ViewModel extends ViewModel {

    Demo1ViewModel() {
        propertyValue<String>(#time, initial: "");
        start();
    }

    start() {
        Timer.periodic(const Duration(seconds: 1), (_) {
            var now = DateTime.now();
            setValue<String>(#time, "${now.hour}:${now.minute}:${now.second}");
        });
    }
}

// View
class Demo1View extends View<Demo1ViewModel> {
  Demo1View() : super(Demo1ViewModel());

  @override
  Widget build(BuildContext context) {
    return Container(
        margin: EdgeInsets.symmetric(vertical: 100),
        padding: EdgeInsets.all(40),
        // binding
        child: $.watchFor<String>(#time, 
            builder: $.builder1((t) => 
              Text(t, textDirection: TextDirection.ltr))));
  }
}

// run
void main() => runApp(Demo1View());

APIs

ViewContext ($.*)

• watch
• watchFor
• watchAny
• watchAnyFor
• $cond
• $condFor
• $if
• $ifFor
• $switch
• $switchFor
• adapt
• builder0
• builder1
• builder2

ViewModel

• registryProperty
• propertyValue
• propertyAdaptive
• propertyAsync
• getValue
• setValue
• updateValue
• notify

Documentation

License

MIT