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Flutter Statelessful widget (inline stateful widgets)
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| import 'package:flutter/material.dart'; | |
| class Statelessful<T> extends StatefulWidget { | |
| final T Function() initialState; | |
| final Widget Function( | |
| BuildContext context, | |
| T state, | |
| void Function(T state) setState, | |
| ) builder; | |
| Statelessful({ | |
| Key key, | |
| @required this.builder, | |
| @required this.initialState, | |
| }) : assert(builder != null), | |
| assert(initialState != null), | |
| super(key: key); | |
| @override | |
| _StatelessfulState<T> createState() => _StatelessfulState<T>(); | |
| } | |
| class _StatelessfulState<T> extends State<Statelessful<T>> { | |
| T _state; | |
| void _setState(T state) { | |
| if (state != _state) { | |
| setState(() { | |
| _state = state; | |
| }); | |
| } | |
| } | |
| @override | |
| void initState() { | |
| super.initState(); | |
| _state = widget.initialState(); | |
| } | |
| @override | |
| Widget build(BuildContext context) { | |
| return widget.builder(context, _state, _setState) ?? Container(); | |
| } | |
| } |
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