A library that allows you to easily pass a data Model from a one Widget to others using messaging system. This will help avoid passing delegates.
A widget can subscribe to external events using on<Channel, Event>() method.
import 'package:flutter/material.dart';
import 'package:glue/glue.dart';
import 'package:glue_example/channels/counter_channel.dart';
import 'package:glue_example/channels/hello_channel.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
BuildContext _context;
@override
void initState() {
Glue.on<HelloChannel, HelloEvent>(_onData);
super.initState();
}
void _onData(event) {
Scaffold.of(_context).showSnackBar(new SnackBar(
content: new Text("Hello clicked"),
));
}
@override
Widget build(BuildContext context) {
_context = context;
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Builder(builder: (context) {
_context = context;
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[CounterView()],
),
);
}),
floatingActionButton: Column(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
FloatingActionButton(
onPressed: () => Glue.emit<CounterChannel>(PlusEvent()),
tooltip: 'Plus',
child: Icon(Icons.add),
),
FloatingActionButton(
onPressed: () => Glue.emit<CounterChannel>(MinusEvent()),
tooltip: 'Minus',
child: Icon(Icons.remove)),
],
)
);
}
@override
void dispose() {
Glue.off<HelloChannel, HelloEvent>(_onData);
super.dispose();
}
}
class CounterView extends StatefulWidget {
_CounterViewState createState() => _CounterViewState();
}
class _CounterViewState extends State<CounterView> {
String _text = '';
@override
void initState() {
Glue.on<CounterChannel, PlusEvent>(_onPlusRecieved);
Glue.on<CounterChannel, MinusEvent>(_onMinusRecieved);
// subscribe to events
super.initState();
}
void _onPlusRecieved(PlusEvent event) {
setState(() {
_text = 'Plus Pushed';
});
}
void _onMinusRecieved(MinusEvent event) {
setState(() {
_text = 'Minus Pushed';
});
}
@override
Widget build(BuildContext context) {
return Column(children: <Widget>[
Text(_text),
RaisedButton(
child: Text('Push'),
onPressed: () {
Glue.emit<HelloChannel>(HelloEvent());
},
)
]);
}
@override
void dispose() {
Glue.off<CounterChannel, PlusEvent>(_onPlusRecieved);
Glue.off<CounterChannel, MinusEvent>(_onMinusRecieved);
super.dispose();
}
}