services_worker 1.0.3

A minimalistic asynchronous worker that simplifies the boilerplate and execution of tasks.

A minimalistic asynchronous worker.

Features

This package simplifies the boilerplate and execution of asynchronous tasks

Usage

import 'package:flutter/material.dart';

import 'package:services_worker/services_worker.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Test',
      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> {
  double _data = 0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(10.0),
        child: SingleChildScrollView(
          child: Center(
            child: Column(
              mainAxisSize: MainAxisSize.min,
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                const SizedBox(
                  height: 15,
                ),
                const Text(
                  'This is the result of your task',
                ),
                const SizedBox(
                  height: 25,
                ),
                Text(
                  _data.toString(),
                ),
              ],
            ),
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _execute,
        tooltip: 'execute',
        child: const Icon(Icons.download),
      ),
    );
  }

  Future _execute() async {
    final res = await ServicesWorker.executeInOtherThread(_hardTask, _data);

    if (res.hasData) {
      final double value = res.data!;

      setState(() {
        _data = value;
      });

      return;
    }

    final error = res.error!;

    throw ServicesException.fromServicesError(
      error,
    );
  }

  static double _hardTask(double oldValue) {
    final double value = oldValue + 1;

    final double newValue = ((((value * value) / 2) * (-1 * value)) / 0.777);

    return newValue;
  }
}

Additional information

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