Animated Progress Bar

An animated progress bar widget designed to be used with video or audio.

Features

✅ Full control of the animations.

✅ Highly customizable.

✅ Nothing is clipped on the edges to give a modern aspect (See audio example below).

✅ Thumb related components are painted above all widgets to achieve fancy effects (See video example below).

Demo with video and audio:

Keep in mind this widget does not play any media by itself!

Quick Example

class Example extends StatefulWidget {
  const Example({super.key});

  @override
  State<Example> createState() => _ExampleState();
}

class _ExampleState extends State<Example> with TickerProviderStateMixin {
  late final ProgressBarController _controller;

  @override
  void initState() {
    super.initState();
    _controller = ProgressBarController(vsync: this);
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ProgressBar(
      controller: _controller,
      progress: const Duration(seconds: 30),
      buffered: const Duration(seconds: 35),
      total: const Duration(minutes: 1),
      onSeek: (position) {
        print('New position: $position');
      },
    );
  }
}

Usage

First, you need a ProgressBarController to run the animations. Similar to AnimationController, you have to pass a TickerProvider which is configured using the vsync argument on the constructor.

To do so, you can add a TickerProviderStateMixin to your State.

class _ExampleState extends State<Example> with TickerProviderStateMixin {...}

Then, add to ProgressBarController:

_controller = ProgressBarController(vsync: this);

After that, add the media progress and total durations. You can also add the buffered position of the media.

ProgressBar(
    controller: _controller,
    progress: const Duration(seconds: 30),
    buffered: const Duration(seconds: 35),
    total: const Duration(minutes: 1),
    onSeek: (position) {
        print('New position: $position');
    },
);

Don't forget to dispose the controller when no longer needed.

ProgressBarController

You can customize the duration of animations as below:

_controller = ProgressBarController(
      vsync: this,
      barAnimationDuration: const Duration(milliseconds: 300),
      thumbAnimationDuration: const Duration(milliseconds: 200),
      waitingDuration: const Duration(seconds: 3),
    );

If you want to go further, the controller gives you full control of the animations:

_controller.forward();                      // Expand bar, wait and then collapse.

_controller.expandBar();                    // Expand the bar.
_controller.collapseBar();                  // Collapse the bar.
_controller.stopBarAnimation();             // Stop bar animation, if running.

_controller.expandThumb();                  // Expand the thumb.
_controller.collapseThumb();                // Collapse the thumb.
_controller.stopThumbAnimation();           // Stop thumb animation, if running.

_controller.expandBar(                      // Expand bar with custom
  duration: const Duration(seconds:1),      // duration and curve.
  curve: Curves.easeIn,
);

The methods that start animations return a TickerFuture object which completes when the animation completes successfully. Which means that you can await for them to finish.

Customization

You can customize the ProgressBar with the following parameters:

Parameter	Type	Description
alignment	ProgressBarAlignment	The alignment of ProgressBar relative to it's total size.
barCapShape	BarCapShape	The shape of the bars at the left and right edges.
progressBarIndicator	ProgressBarIndicator	The indicator to be painted.
collapsedBarHeight	double	The smallest size of this bar.
collapsedThumbRadius	double	The smallest size of this thumb.
expandedBarHeight	double	The greatest size of this bar.
expandedThumbRadius	double	The greatest size of this thumb.
thumbGlowRadius	double	The overlay drawn around the thumb.
thumbElevation	double	The size of the shadow around the thumb.
thumbGlowColor	Color	The color of the overlay drawn around the thumb.
backgroundBarColor	Color	The color of the bar in background.
collapsedProgressBarColor	Color	The color of the collapsed progress bar.
collapsedBufferedBarColor	Color	The color of the collapsed buffered bar.
collapsedThumbColor	Color	The color of the collapsed thumb.
expandedProgressBarColor	Color?	The color of the expanded progress bar.
expandedBufferedBarColor	Color?	The color of the expanded buffered bar.
expandedThumbColor	Color?	The color of the expanded thumb.
lerpColorsTransition	bool	Whether colors should be linearly interpolated when transitioning from collapsed to expanded state and vice versa.
showBufferedWhenCollapsed	bool	Whether the buffered bar should be shown when collapsed.

To quickly try it out all these features, check the Playground:

Notes

If you find any bugs, don't hesitate to open an issue!