stream_variable

Description:

stream variable

stream_variable #
A simple statemanagement package
Usage #
To use this plugin, add stream_variable as a dependency in your pubspec.yaml file.
Installation #
stream_variable:
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Example #
import 'package:flutter/material.dart';
import 'package:stream_variable/stream_variable.dart';

void main() {
runApp(const MyApp());
}

class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);

// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}

class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;

@override
State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
//* stream variable type counter
late StreamVariable<int> _counter;

@override
void initState() {
//* initialize StreamVarible instance
_counter = StreamVariable<int>();

//* now initialize value in it
_counter.setVariable = 0;

//* now add to variableSink
_counter.variableSink.add(_counter.getVariable);

super.initState();
}

@override
void dispose() {
//* disposing the stream
_counter.disposeStream();

super.dispose();
}

//* method to increment counter
void _incrementCounter() {
setState(() {
//* first get variable value then update it by setting it
_counter.setVariable = _counter.getVariable + 1;

//* then add to variable sink
_counter.variableSink.add(_counter.getVariable);
});
}

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'You have pushed the button this many times:',
),
StreamBuilder<int>(

//* use variable stream to stream varaible
initialData: 0,
stream: _counter.variableStream,
builder: (context, AsyncSnapshot<int> snapshot) {
return Text(
'${snapshot.data}',
style: Theme.of(context).textTheme.headline4,
);
}),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
),
);
}
}
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Class methods and variables #
variableSink : Getter for StreamSink<T>
variableStream : Getter for Stream<T>
getVariable : Getter for variable
setVariable : Setter for variable
disposeStream : method to dispose or close the stream
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Github link for package #
https://github.com/ANGADJIT/stream_variable