progress_bar_countdown 0.0.3

An animated timer that counts down like a progress bar

Progress Bar Countdown

Create an animated linear progress bar countdown timer using Progress Bar Countdown.

Features

• Forward and reverse countdown timer
• Start, pause, resume, and reset timer functionality
• Customizable colors and styles
• Left-to-right or right-to-left progress direction
• Option to format the countdown timer string
• Option to show/hide countdown text

Getting Started

To use this plugin, add progress_bar_countdown as a dependency in your pubspec.yaml file.

dependencies:
  progress_bar_countdown: ^0.0.2

Usage

ProgressBarCountdown(
  initialDuration: Duration(seconds: 60),
  progressColor: Colors.blue,
  progressBackgroundColor: Colors.grey[300]!,
  initialTextColor: Colors.black,
  revealedTextColor: Colors.white,
  height: 40,
  textStyle: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
  countdownDirection: ProgressBarCountdownAlignment.left,
  controller: ProgressBarCountdownController(),
  autoStart: true,
  onComplete: () {
    print('Countdown Completed');
  },
  onStart: () {
    print('Countdown Started');
  },
  onChange: (String timeStamp) {
    print('Countdown Changed $timeStamp');
  },
  timeFormatter: (Duration remainingTime) {
    final minutes = remainingTime.inMinutes
        .remainder(60)
        .toString()
        .padLeft(2, '0');
    final seconds = remainingTime.inSeconds
        .remainder(60)
        .toString()
        .padLeft(2, '0');
    final milliseconds = (remainingTime.inMilliseconds % 1000 ~/ 10)
        .toString()
        .padLeft(2, '0');
    return '$minutes:$seconds:$milliseconds';
  }
)

Parameters

Name	Type	Default Value	Description
initialDuration	Duration	required	Countdown duration in seconds.
progressColor	Color	required	Color of the progress bar.
progressBackgroundColor	Color	Colors.white	Background color of the progress bar.
initialTextColor	Color?	null	Initial color of the countdown text.
revealedTextColor	Color?	null	Color of the countdown text as it's revealed by the progress bar.
hideText	bool	false	Whether to hide the countdown text.
height	double	50.0	Height of the progress bar.
textStyle	TextStyle	TextStyle(fontSize: 18, fontWeight: FontWeight.bold)	Style of the countdown text.
countdownDirection	ProgressBarCountdownAlignment	ProgressBarCountdownAlignment.left	Direction of the countdown (left-to-right or right-to-left).
controller	ProgressBarCountdownController?	null	Controller for the countdown timer.
autoStart	bool	false	Whether to start the countdown automatically.
onComplete	VoidCallback?	null	Callback executed when the countdown completes.
onStart	VoidCallback?	null	Callback executed when the countdown starts.
onChange	ValueChanged<String>?	null	Callback executed when the countdown value changes.
textFormatter	String Function(Duration remainingTime)?	null	Callback executed when the countdown value changes.

ProgressBarCountdownController

The ProgressBarCountdownController allows you to control the countdown timer programmatically.

Methods

• start(): Starts the countdown timer.
• pause(): Pauses the countdown timer.
• resume(): Resumes the paused countdown timer.
• reset({double? duration}): Resets the countdown timer. Optionally specify a new duration.
• getTime(): Returns the current time of the countdown timer as a string.

Usage Example

final controller = ProgressBarCountdownController();

// In your build method
ProgressBarCountdown(
  // ... other parameters ...
  controller: controller,
)

// Later in your code
ElevatedButton(
  onPressed: () => controller.start(),
  child: Text('Start'),
)

ElevatedButton(
  onPressed: () => controller.pause(),
  child: Text('Pause'),
)

ElevatedButton(
  onPressed: () => controller.resume(),
  child: Text('Resume'),
)

ElevatedButton(
  onPressed: () => controller.reset(duration: 30),
  child: Text('Reset to 30 seconds'),
)

Example

Here's a complete example demonstrating how to use the ProgressBarCountdown widget:

import 'package:flutter/material.dart';
import 'package:progress_bar_countdown/progress_bar_countdown.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Progress Bar Countdown Example')),
        body: Center(
          child: ProgressBarCountdown(
            initialDuration: Duration(seconds: 60),
            progressColor: Colors.blue,
            progressBackgroundColor: Colors.grey[300]!,
            initialTextColor: Colors.black,
            revealedTextColor: Colors.white,
            height: 40,
            textStyle: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
            countdownDirection: ProgressBarCountdownAlignment.left,
            controller: ProgressBarCountdownController(),
            autoStart: true,
            onComplete: () {
              print('Countdown Completed');
            },
            onStart: () {
              print('Countdown Started');
            },
            onChange: (String timeStamp) {
              print('Countdown Changed $timeStamp');
            },
            timeFormatter: (Duration remainingTime) {
              final minutes = remainingTime.inMinutes
                  .remainder(60)
                  .toString()
                  .padLeft(2, '0');
              final seconds = remainingTime.inSeconds
                  .remainder(60)
                  .toString()
                  .padLeft(2, '0');
              final milliseconds = (remainingTime.inMilliseconds % 1000 ~/ 10)
                  .toString()
                  .padLeft(2, '0');
              return '$minutes:$seconds:$milliseconds';
            },
          ),
        ),
      ),
    );
  }
}

This example creates a simple app with a progress bar countdown that starts automatically and runs for 60 seconds.