uigitdev_stream_holder

Description:

uigitdev stream holder

Stream and data holder class, which helps to ensure reusability
and reduce the number of lines of code.
Usage #
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:uigitdev_stream_holder/src/stream_holder.dart';
import 'package:uigitdev_stream_holder/src/stream_holder_builder.dart';

void main() {
runApp(
MultiProvider(
providers: [
ChangeNotifierProvider<MainProvider>(create: (_) => MainProvider()),
],
child: const MyApp(),
),
);
}

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

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: SizedBox(
width: double.maxFinite,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
_countDataBuilder(),
_countButton(),
_errorButton(),
_emptyButton(),
],
),
),
),
);
}

Widget _emptyButton() {
return Consumer<MainProvider>(
builder: (context, provider, _) {
return TextButton(
onPressed: () => provider.countStreamHolder.addData(null),
child: Text('Empty'),
);
},
);
}

Widget _errorButton() {
return Consumer<MainProvider>(
builder: (context, provider, _) {
return TextButton(
onPressed: () => provider.countStreamHolder.addError(ErrorHint('some-error')),
child: Text('Add Error'),
);
},
);
}

Widget _countButton() {
return Consumer<MainProvider>(
builder: (context, provider, _) {
return TextButton(
onPressed: () => provider.countStreamHolder.addData(Random().nextInt(500)),
child: Text('+'),
);
},
);
}

Widget _countDataBuilder() {
return Consumer<MainProvider>(
builder: (context, provider, _) {
return StreamHolderBuilder<int?>(
streamHolder: provider.countStreamHolder,
builder: (context, state, data, error) {
switch (state) {
case StreamHolderState.none:
return const CircularProgressIndicator();
case StreamHolderState.hasData:
return Text('success: $data');
case StreamHolderState.hasError:
return Text('error: ${error.toString()}');
}
},
);
},
);
}
}

class MainProvider extends ChangeNotifier {
final countStreamHolder = StreamHolder<int?>(null);
}

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License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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