Extremely lightweight state management framework in only 120 lines of code.
Direct access to state is the bottom line, indirect access such as controller.something is completely unacceptable.
I have developed the world's fastest general purpose sorting algorithm, which is on average 3 times faster than Quicksort and up to 20 times faster, ChenSort
voidmain() {
runApp(Stateful.of(CounterVState()));
}
import'package:flutter/material.dart';
import'package:flutter_constraintlayout/flutter_constraintlayout.dart';
import'package:flutter_pvstate/pv_state.dart';
/// Presenter state, logic is written hereabstractclassCounterPStateextendsBasePagePState {
final count =obs(0);
voidadd() {
count.value = count.value +1;
}
// int count = 0;//// void add() {// setState(() {// count++;// });// }
}
/// View state, view is written hereclassCounterVStateextendsCounterPStatewithVState {
@overrideWidgetbuild(BuildContext context) {
returnMaterialApp(
home:Scaffold(
appBar:AppBar(
title:constText('Flutter Demo Home Page'),
),
body:ConstraintLayout(
children: [
constText(
'You have pushed the button this many times:',
).applyConstraint(
centerTo: parent,
),
/// Local updateValueListenableBuilder(
valueListenable: count,
builder: (_, value, __) {
returnText(
'$value',
style:Theme
.of(context)
.textTheme
.headline4,
);
},
).applyConstraint(
outBottomCenterTo:rId(0),
),
/// Global update// Text(// '$count', // Direct access to count// style: Theme.of(context).textTheme.headline4,// ).applyConstraint(// outBottomCenterTo: rId(0),// ),FloatingActionButton(
onPressed: add, // Widget and logic separation
child:constIcon(Icons.add),
).applyConstraint(
bottomRightTo: parent,
margin:constEdgeInsets.only(
right:20,
bottom:20,
),
)
],
),
),
);
}
}MIT License
Copyright (c) 2022 hackware1993
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