streamful 2.0.0 streamful: ^2.0.0 copied to clipboard
This package provides widgets and utilities to deal with streams.
import 'package:example/bloc.dart';
import 'package:flutter/material.dart';
import 'package:streamful/streamful.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Streamful Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Streamful Demo'),
);
}
}
class MyHomePage extends StatefulWidget {
final String? title;
MyHomePage({Key? key, this.title}) : super(key: key);
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Color? _color = Colors.blue;
double _strokeWidth = 4.0;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text(widget.title!)),
body: Padding(
padding: EdgeInsets.all(16.0),
child: _buildContent(),
),
);
}
Widget _buildContent() {
return Column(
children: [
Container(
alignment: Alignment.centerLeft,
child: Text(
'Streamful',
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 22.0),
),
),
Padding(
padding: const EdgeInsets.only(bottom: 8.0),
child: _buildColorPicker(),
),
Padding(
padding: const EdgeInsets.only(bottom: 8.0),
child: _buildStrokeSizer(),
),
Padding(
padding: const EdgeInsets.only(bottom: 8.0),
child: _buildActionButtons(),
),
StreamWidget<String?>(
stream: bloc.data,
onData: (data) => Text(data!),
onError: (error) => Text(error.toString()),
onLoad: StreamedLoading(
stream: bloc.isLoading,
color: _color,
strokeWidth: _strokeWidth,
),
),
],
);
}
Widget _buildColorPicker() {
return Row(
children: [
Expanded(
child: Padding(
padding: const EdgeInsets.only(right: 8.0),
child: Text('Select a color'),
),
),
Expanded(
child: DropdownButton<Color>(
isExpanded: true,
value: _color,
items: _colors,
onChanged: (color) {
setState(() {
_color = color;
});
},
),
),
],
);
}
List<DropdownMenuItem<Color>> get _colors {
Map<String, Color> colors = {
'Blue': Colors.blue,
'Red': Colors.red,
'Orange': Colors.orange,
'Green': Colors.green,
};
List<DropdownMenuItem<Color>> _list = [];
colors.forEach((key, value) {
_list.add(
DropdownMenuItem(child: Text(key), value: value),
);
});
return _list;
}
Widget _buildStrokeSizer() {
return Row(
children: [
Expanded(
child: Padding(
padding: const EdgeInsets.only(right: 8.0),
child: Text('Set the stroke width'),
),
),
Expanded(
child: Slider(
min: 1,
max: 10,
value: _strokeWidth,
onChanged: (value) {
setState(() {
_strokeWidth = value;
});
},
),
),
],
);
}
Widget _buildActionButtons() {
return Row(
children: [
ElevatedButton(
onPressed: () {
bloc.getData();
},
child: Text('Success'),
),
Spacer(),
ElevatedButton(
onPressed: () {
bloc.getError();
},
child: Text('Error'),
),
],
);
}
}