Created
May 26, 2021 12:11
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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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