linear_progress_bar 2.0.0+2 
linear_progress_bar: ^2.0.0+2 copied to clipboard
Published 9 hours ago • 
angopapo.com
angopapo.comA powerful and customizable linear progress bar widget for Flutter. Supports linear bars, dots indicators, titled progress, gradients, and animations.
import 'package:flutter/material.dart';
import 'package:linear_progress_bar/linear_progress_bar.dart';
void main() {
runApp(const MyApp());
}
/// The main application widget.
class MyApp extends StatelessWidget {
/// Creates the main application widget.
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Linear Progress Bar Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const ExamplesPage(),
);
}
}
/// The main examples page that displays different progress bar examples.
class ExamplesPage extends StatefulWidget {
/// Creates the examples page widget.
const ExamplesPage({super.key});
@override
State<ExamplesPage> createState() => _ExamplesPageState();
}
class _ExamplesPageState extends State<ExamplesPage> {
int _selectedIndex = 0;
final List<Widget> _pages = const [
LinearProgressExamples(),
DotsProgressExamples(),
TitledProgressExamples(),
AnimatedProgressExamples(),
];
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: const Text('Linear Progress Bar Demo'),
),
body: _pages[_selectedIndex],
bottomNavigationBar: NavigationBar(
selectedIndex: _selectedIndex,
onDestinationSelected: (index) {
setState(() => _selectedIndex = index);
},
destinations: const [
NavigationDestination(
icon: Icon(Icons.linear_scale),
label: 'Linear',
),
NavigationDestination(
icon: Icon(Icons.more_horiz),
label: 'Dots',
),
NavigationDestination(
icon: Icon(Icons.title),
label: 'Titled',
),
NavigationDestination(
icon: Icon(Icons.animation),
label: 'Animated',
),
],
),
);
}
}
/// Examples of linear progress bars
class LinearProgressExamples extends StatefulWidget {
/// Creates the linear progress examples widget.
const LinearProgressExamples({super.key});
@override
State<LinearProgressExamples> createState() => _LinearProgressExamplesState();
}
class _LinearProgressExamplesState extends State<LinearProgressExamples> {
int _currentStep = 3;
final int _maxSteps = 6;
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_buildSectionTitle('Basic Linear Progress'),
_buildExampleCard(
'Simple Progress Bar',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.blue,
backgroundColor: Colors.grey.shade300,
minHeight: 10,
),
),
_buildSectionTitle('Rounded Corners'),
_buildExampleCard(
'With Border Radius',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.green,
backgroundColor: Colors.grey.shade300,
borderRadius: BorderRadius.circular(10),
minHeight: 16,
),
),
_buildSectionTitle('Different Heights'),
_buildExampleCard(
'Thin (4px)',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.purple,
backgroundColor: Colors.grey.shade300,
minHeight: 4,
borderRadius: BorderRadius.circular(2),
),
),
const SizedBox(height: 8),
_buildExampleCard(
'Medium (12px)',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.purple,
backgroundColor: Colors.grey.shade300,
minHeight: 12,
borderRadius: BorderRadius.circular(6),
),
),
const SizedBox(height: 8),
_buildExampleCard(
'Thick (24px)',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.purple,
backgroundColor: Colors.grey.shade300,
minHeight: 24,
borderRadius: BorderRadius.circular(12),
),
),
_buildSectionTitle('Gradient Progress'),
_buildExampleCard(
'Gradient Bar',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressGradient: const LinearGradient(
colors: [Colors.blue, Colors.purple, Colors.pink],
),
backgroundColor: Colors.grey.shade300,
minHeight: 16,
borderRadius: BorderRadius.circular(8),
),
),
const SizedBox(height: 24),
_buildControlButtons(),
],
),
);
}
Widget _buildControlButtons() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ElevatedButton.icon(
onPressed: _currentStep > 0
? () => setState(() => _currentStep--)
: null,
icon: const Icon(Icons.remove),
label: const Text('Decrease'),
),
const SizedBox(width: 16),
Text(
'$_currentStep / $_maxSteps',
style: Theme.of(context).textTheme.titleMedium,
),
const SizedBox(width: 16),
ElevatedButton.icon(
onPressed: _currentStep < _maxSteps
? () => setState(() => _currentStep++)
: null,
icon: const Icon(Icons.add),
label: const Text('Increase'),
),
],
);
}
Widget _buildSectionTitle(String title) {
return Padding(
padding: const EdgeInsets.symmetric(vertical: 12),
child: Text(
title,
style: Theme.of(context).textTheme.titleLarge?.copyWith(
fontWeight: FontWeight.bold,
),
),
);
}
Widget _buildExampleCard(String title, Widget child) {
return Card(
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(title, style: Theme.of(context).textTheme.bodyMedium),
const SizedBox(height: 12),
child,
],
),
),
);
}
}
/// Examples of dots progress indicators
class DotsProgressExamples extends StatefulWidget {
/// Creates the dots progress examples widget.
const DotsProgressExamples({super.key});
@override
State<DotsProgressExamples> createState() => _DotsProgressExamplesState();
}
class _DotsProgressExamplesState extends State<DotsProgressExamples> {
int _currentStep = 2;
final int _maxSteps = 5;
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_buildSectionTitle('Basic Dots Indicator'),
_buildExampleCard(
'Horizontal Dots',
Center(
child: LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.dots,
currentStep: _currentStep,
progressColor: Colors.blue,
backgroundColor: Colors.grey.shade400,
),
),
),
_buildSectionTitle('Custom Sizes'),
_buildExampleCard(
'Large Active Dot',
Center(
child: LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.dots,
currentStep: _currentStep,
progressColor: Colors.orange,
backgroundColor: Colors.grey.shade400,
dotsActiveSize: 16,
dotsInactiveSize: 10,
),
),
),
_buildSectionTitle('Custom Spacing'),
_buildExampleCard(
'Wide Spacing',
Center(
child: LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.dots,
currentStep: _currentStep,
progressColor: Colors.green,
backgroundColor: Colors.grey.shade400,
dotsSpacing: const EdgeInsets.symmetric(horizontal: 12),
),
),
),
_buildSectionTitle('Vertical Dots'),
_buildExampleCard(
'Vertical Layout',
Center(
child: SizedBox(
height: 150,
child: LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.dots,
currentStep: _currentStep,
progressColor: Colors.purple,
backgroundColor: Colors.grey.shade400,
dotsAxis: Axis.vertical,
dotsActiveSize: 12,
dotsInactiveSize: 8,
),
),
),
),
_buildSectionTitle('Reversed Dots'),
_buildExampleCard(
'Reversed Order',
Center(
child: LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.dots,
currentStep: _currentStep,
progressColor: Colors.red,
backgroundColor: Colors.grey.shade400,
dotsReversed: true,
),
),
),
_buildSectionTitle('Interactive Dots'),
_buildExampleCard(
'Tap to Change Step',
Center(
child: LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.dots,
currentStep: _currentStep,
progressColor: Colors.teal,
backgroundColor: Colors.grey.shade400,
dotsActiveSize: 14,
dotsInactiveSize: 10,
onDotTap: (position) {
setState(() => _currentStep = position.toInt());
},
),
),
),
const SizedBox(height: 24),
_buildControlButtons(),
],
),
);
}
Widget _buildControlButtons() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ElevatedButton.icon(
onPressed: _currentStep > 0
? () => setState(() => _currentStep--)
: null,
icon: const Icon(Icons.remove),
label: const Text('Previous'),
),
const SizedBox(width: 16),
Text(
'Step ${_currentStep + 1} of $_maxSteps',
style: Theme.of(context).textTheme.titleMedium,
),
const SizedBox(width: 16),
ElevatedButton.icon(
onPressed: _currentStep < _maxSteps - 1
? () => setState(() => _currentStep++)
: null,
icon: const Icon(Icons.add),
label: const Text('Next'),
),
],
);
}
Widget _buildSectionTitle(String title) {
return Padding(
padding: const EdgeInsets.symmetric(vertical: 12),
child: Text(
title,
style: Theme.of(context).textTheme.titleLarge?.copyWith(
fontWeight: FontWeight.bold,
),
),
);
}
Widget _buildExampleCard(String title, Widget child) {
return Card(
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(title, style: Theme.of(context).textTheme.bodyMedium),
const SizedBox(height: 12),
child,
],
),
),
);
}
}
/// Examples of titled progress bars
class TitledProgressExamples extends StatefulWidget {
/// Creates the titled progress examples widget.
const TitledProgressExamples({super.key});
@override
State<TitledProgressExamples> createState() => _TitledProgressExamplesState();
}
class _TitledProgressExamplesState extends State<TitledProgressExamples> {
int _currentStep = 65;
final int _maxSteps = 100;
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_buildSectionTitle('Text Label'),
_buildExampleCard(
'Center Label',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressColor: Colors.blue,
backgroundColor: Colors.grey.shade300,
label: 'Loading...',
labelColor: Colors.white,
minHeight: 24,
borderRadius: BorderRadius.circular(12),
),
),
_buildSectionTitle('Percentage Display'),
_buildExampleCard(
'Show Percentage',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressColor: Colors.green,
backgroundColor: Colors.grey.shade300,
labelType: LabelType.percentage,
labelColor: Colors.white,
labelFontWeight: FontWeight.bold,
minHeight: 28,
borderRadius: BorderRadius.circular(14),
),
),
_buildSectionTitle('Step Count'),
_buildExampleCard(
'Show Step Count',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressColor: Colors.purple,
backgroundColor: Colors.grey.shade300,
labelType: LabelType.stepCount,
labelColor: Colors.white,
minHeight: 24,
borderRadius: BorderRadius.circular(12),
),
),
_buildSectionTitle('Label Positions'),
_buildExampleCard(
'Label on Top',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressColor: Colors.orange,
backgroundColor: Colors.grey.shade300,
labelType: LabelType.percentage,
labelPosition: LabelPosition.top,
labelColor: Colors.black87,
minHeight: 12,
borderRadius: BorderRadius.circular(6),
),
),
const SizedBox(height: 8),
_buildExampleCard(
'Label at Start',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressColor: Colors.teal,
backgroundColor: Colors.grey.shade300,
labelType: LabelType.percentage,
labelPosition: LabelPosition.start,
labelColor: Colors.white,
minHeight: 24,
borderRadius: BorderRadius.circular(12),
),
),
const SizedBox(height: 8),
_buildExampleCard(
'Label at End',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressColor: Colors.indigo,
backgroundColor: Colors.grey.shade300,
labelType: LabelType.percentage,
labelPosition: LabelPosition.end,
labelColor: Colors.white,
minHeight: 24,
borderRadius: BorderRadius.circular(12),
),
),
_buildSectionTitle('With Gradient'),
_buildExampleCard(
'Gradient + Percentage',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressGradient: const LinearGradient(
colors: [Colors.pink, Colors.purple, Colors.blue],
),
backgroundColor: Colors.grey.shade300,
labelType: LabelType.percentage,
labelColor: Colors.white,
labelFontWeight: FontWeight.bold,
minHeight: 28,
borderRadius: BorderRadius.circular(14),
),
),
const SizedBox(height: 24),
_buildSlider(),
],
),
);
}
Widget _buildSlider() {
return Card(
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
children: [
Text(
'Adjust Progress: $_currentStep%',
style: Theme.of(context).textTheme.titleMedium,
),
Slider(
value: _currentStep.toDouble(),
min: 0,
max: _maxSteps.toDouble(),
divisions: _maxSteps,
onChanged: (value) {
setState(() => _currentStep = value.toInt());
},
),
],
),
),
);
}
Widget _buildSectionTitle(String title) {
return Padding(
padding: const EdgeInsets.symmetric(vertical: 12),
child: Text(
title,
style: Theme.of(context).textTheme.titleLarge?.copyWith(
fontWeight: FontWeight.bold,
),
),
);
}
Widget _buildExampleCard(String title, Widget child) {
return Card(
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(title, style: Theme.of(context).textTheme.bodyMedium),
const SizedBox(height: 12),
child,
],
),
),
);
}
}
/// Examples of animated progress bars
class AnimatedProgressExamples extends StatefulWidget {
/// Creates the animated progress examples widget.
const AnimatedProgressExamples({super.key});
@override
State<AnimatedProgressExamples> createState() =>
_AnimatedProgressExamplesState();
}
class _AnimatedProgressExamplesState extends State<AnimatedProgressExamples> {
int _currentStep = 50;
final int _maxSteps = 100;
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_buildSectionTitle('Smooth Animation'),
_buildExampleCard(
'Default Animation (300ms)',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.blue,
backgroundColor: Colors.grey.shade300,
minHeight: 16,
borderRadius: BorderRadius.circular(8),
animateProgress: true,
),
),
_buildSectionTitle('Slow Animation'),
_buildExampleCard(
'Slow Animation (1 second)',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.green,
backgroundColor: Colors.grey.shade300,
minHeight: 16,
borderRadius: BorderRadius.circular(8),
animateProgress: true,
animationDuration: const Duration(seconds: 1),
),
),
_buildSectionTitle('Custom Animation Curve'),
_buildExampleCard(
'Bounce Out Curve',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.orange,
backgroundColor: Colors.grey.shade300,
minHeight: 16,
borderRadius: BorderRadius.circular(8),
animateProgress: true,
animationDuration: const Duration(milliseconds: 800),
animationCurve: Curves.bounceOut,
),
),
const SizedBox(height: 8),
_buildExampleCard(
'Elastic Out Curve',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressColor: Colors.purple,
backgroundColor: Colors.grey.shade300,
minHeight: 16,
borderRadius: BorderRadius.circular(8),
animateProgress: true,
animationDuration: const Duration(milliseconds: 600),
animationCurve: Curves.elasticOut,
),
),
_buildSectionTitle('Animated Gradient'),
_buildExampleCard(
'Gradient with Animation',
LinearProgressBar(
maxSteps: _maxSteps,
progressType: ProgressType.linear,
currentStep: _currentStep,
progressGradient: const LinearGradient(
colors: [Colors.cyan, Colors.blue, Colors.purple],
),
backgroundColor: Colors.grey.shade300,
minHeight: 20,
borderRadius: BorderRadius.circular(10),
animateProgress: true,
animationDuration: const Duration(milliseconds: 500),
),
),
_buildSectionTitle('Animated Titled Progress'),
_buildExampleCard(
'Percentage with Animation',
TitledProgressBar(
maxSteps: _maxSteps,
currentStep: _currentStep,
progressColor: Colors.teal,
backgroundColor: Colors.grey.shade300,
labelType: LabelType.percentage,
labelColor: Colors.white,
labelFontWeight: FontWeight.bold,
minHeight: 28,
borderRadius: BorderRadius.circular(14),
animateProgress: true,
animationDuration: const Duration(milliseconds: 400),
),
),
const SizedBox(height: 24),
_buildControlButtons(),
],
),
);
}
Widget _buildControlButtons() {
return Card(
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
children: [
Text(
'Test Animation: $_currentStep%',
style: Theme.of(context).textTheme.titleMedium,
),
const SizedBox(height: 16),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
ElevatedButton(
onPressed: () => setState(() => _currentStep = 0),
child: const Text('0%'),
),
ElevatedButton(
onPressed: () => setState(() => _currentStep = 25),
child: const Text('25%'),
),
ElevatedButton(
onPressed: () => setState(() => _currentStep = 50),
child: const Text('50%'),
),
ElevatedButton(
onPressed: () => setState(() => _currentStep = 75),
child: const Text('75%'),
),
ElevatedButton(
onPressed: () => setState(() => _currentStep = 100),
child: const Text('100%'),
),
],
),
],
),
),
);
}
Widget _buildSectionTitle(String title) {
return Padding(
padding: const EdgeInsets.symmetric(vertical: 12),
child: Text(
title,
style: Theme.of(context).textTheme.titleLarge?.copyWith(
fontWeight: FontWeight.bold,
),
),
);
}
Widget _buildExampleCard(String title, Widget child) {
return Card(
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(title, style: Theme.of(context).textTheme.bodyMedium),
const SizedBox(height: 12),
child,
],
),
),
);
}
}Metadata
81
likes
150
points
14.7k
downloads
Publisher
Weekly Downloads
Metadata
A powerful and customizable linear progress bar widget for Flutter. Supports linear bars, dots indicators, titled progress, gradients, and animations.
Homepage
Repository (GitHub)
View/report issues
Topics
#progress #indicator #ui #widget
Documentation
License
BSD-2-Clause (license)
