Simple circular progress bar

Open source Flutter package, simple circular progress bar.

Installing

Add in pubspec.yaml:

dependencies:
  flutter:
    sdk: flutter
  simple_circular_progress_bar: ^1.0.1

Now in your code, you can import:

import 'package:simple_circular_progress_bar/simple_circular_progress_bar.dart';

Basic examples

See the full example here. Most of the examples are in the rows_in_progress_bar_example folder.

Example numbers correspond to their numbers in the code. To quickly find examples in the repository, look in the code: ‘EXAMPLE CODE’.

Colors

Dart code

// Example 1
SimpleCircularProgressBar(
    progressColors: const [Colors.cyan],
)

// Example 2
SimpleCircularProgressBar(
    progressColors: const [Colors.cyan, Colors.purple],
),

// Example 3
SimpleCircularProgressBar(
    progressColors: const [
        Colors.cyan,
        Colors.green,
        Colors.amberAccent,
        Colors.redAccent,
        Colors.purpleAccent
    ],
    backColor: Colors.blueGrey,
),

Start angle

Dart code

// Example 4
SimpleCircularProgressBar(
    startAngle: 45,
),

// Example 5
SimpleCircularProgressBar(
    startAngle: 90,
),

// Example 6
SimpleCircularProgressBar(
    startAngle: -180,
),

Thickness of the lines

Dart code

// Example 7
SimpleCircularProgressBar(
    size: 80,
    progressStrokeWidth: 25,
    backStrokeWidth: 25,
),

// Example 8
SimpleCircularProgressBar(
    progressStrokeWidth: 20,
    backStrokeWidth: 10,
),

// Example 9
SimpleCircularProgressBar(
    backStrokeWidth: 0,
),

Merge mode

Dart code

// Example 10
SimpleCircularProgressBar(
    progressColors: const [Colors.cyan],
    mergeMode: true,
),

// Example 11
SimpleCircularProgressBar(
    progressColors: const [Colors.cyan],
    fullProgressColor: Colors.deepOrangeAccent,
    mergeMode: true,
),

// Example 12
SimpleCircularProgressBar(
    progressColors: const [Colors.cyan, Colors.purpleAccent],
    mergeMode: true,
),

Animation time

If you don’t need animation, set animationDuration = 0.

Dart code

// Example 13
SimpleCircularProgressBar(
    mergeMode: true,
    animationDuration: 1,
),

// Example 14
SimpleCircularProgressBar(
    mergeMode: true,
    animationDuration: 3,
),

// Example 15
SimpleCircularProgressBar(
    mergeMode: true,
    animationDuration: 6,
),

Text

Dart code

// Example 16
SimpleCircularProgressBar(
    mergeMode: true,
    onGetText: (double value) {
        return Text('${value.toInt()}%');
    },
),

// Example 17
SimpleCircularProgressBar(
    valueNotifier: valueNotifier,
    mergeMode: true,
    onGetText: (double value) {
        return Text(
            '${value.toInt()}',
            style: const TextStyle(
                fontSize: 30,
                fontWeight: FontWeight.bold,
                color: Colors.white,
            ),
        );
    },
),

// Example 18
SimpleCircularProgressBar(
    valueNotifier: valueNotifier,
    mergeMode: true,
    onGetText: (double value) {
        TextStyle centerTextStyle = TextStyle(
            fontSize: 30,
            fontWeight: FontWeight.bold,
            color: Colors.greenAccent.withOpacity(value * 0.01),
        );
        
        return Text(
            '${value.toInt()}',
            style: centerTextStyle,
        );
    },
),

Value Notifier Example

You can read about how ValueNotifier works here.

The source code of the example can be found here.

Parameters description

Parameter	Default	Description
size double	100	Widget size.
maxValuedouble	100	The maximum value of the progress bar. The values will vary from 0 to [maxValue].
startAngledouble	0	The angle from which the countdown of progress begins.
progressStrokeWidthdouble	15	Thickness of the progress line.
backStrokeWidthdouble	15	Line thickness of the background circle. If you don’t need a background circle, set this parameter to 0.
progressColorsList		Progress bar can be either with or without a gradient. For a gradient, specify more than one color in the [progressColors] field and if a gradient is not needed specify only one color.
fullProgressColorColor		The color of the circle at 100% value. It only works when [mergeMode] equal to true.
backColorColor		The color of the background circle.
animationDurationint	6	Animation duration in seconds. If you don’t need animation, set this parameter to 0.
mergeModebool	false	When this mode is enabled the progress bar with a 100% value forms a full circle.
valueNotifierValueNotifier		The object designed to update the value of the progress bar. By default, creates a ValueNotifier with the maximum value.
onGetTextText Function(double)		Callback to generate a new Text widget located in the center of the progress bar. The callback input is the current value of the progress bar.

YouTube video

You can see how the application works from the example in this video.

GitHub

View Github