radial_slider 0.0.2

  • README.md
  • Example
  • Installing
  • Versions
  • 59


A radial slider widget.

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing package code, view the documentation.

[0.0.1] - TODO: Add release date.

  • TODO: Describe initial release.


import 'dart:math';
import 'package:flutter/material.dart';
import 'package:radial_slider/radial_slider.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
        accentColor: Colors.red,
        brightness: Brightness.light,
      home: Scaffold(
          appBar: AppBar(
            title: Text('Flutter Demo')
          body: AppBody(),

const double START_ANGLE = - pi / 2;

class AppBody extends StatefulWidget {
  _AppBodyState createState() => _AppBodyState();

class _AppBodyState extends State<AppBody> {
  double angle = START_ANGLE;

  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[
          height: 60.0,
          child: Center(child: Text('Angle: ${angle.toStringAsFixed(2)}'))
          flex: 1,
          child: RadialSlider(
            color: Colors.yellow,
            backgroundColor: Colors.blue,
            backgroundGradient: null,
            radius: 120.0,
            initialAngle: angle,
            maxAngle: pi * 2 - START_ANGLE,
            onChange: (a) {
              setState(() {
                angle = a;
            onChanging: (a) {
              setState(() {
                angle = a;
          height: 30.0,

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  radial_slider: ^0.0.2

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:radial_slider/radial_slider.dart';
Version Uploaded Documentation Archive
0.0.2 Sep 16, 2018 Go to the documentation of radial_slider 0.0.2 Download radial_slider 0.0.2 archive
0.0.1 Aug 7, 2018 Go to the documentation of radial_slider 0.0.1 Download radial_slider 0.0.1 archive
Describes how popular the package is relative to other packages. [more]
Code health derived from static analysis. [more]
Reflects how tidy and up-to-date the package is. [more]
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Learn more about scoring.

We analyzed this package on Dec 5, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.1.0
  • pana: 0.12.7
  • Flutter: 1.0.0


Detected platforms: Flutter

References Flutter, and has no conflicting libraries.

Health issues and suggestions

Document public APIs (-9.57 points)

22 out of 23 API elements (library, class, field or method) have no adequate dartdoc content. Good documentation improves code readability and discoverability through search.

Fix lib/src/radial_slider.dart. (-0.50 points)

Analysis of lib/src/radial_slider.dart reported 1 hint:

line 4 col 7: This class inherits from a class marked as @immutable, and therefore should be immutable (all instance fields must be final).

Maintenance suggestions

The description is too short. (-20 points)

Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

Package is pre-v0.1 release. (-10 points)

While there is nothing inherently wrong with versions of 0.0.*, it usually means that the author is still experimenting with the general direction of the API.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.19.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11
meta 1.1.6
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies