✨ Added #

• CountdownTimerController: imperative API (start / pause / resume / reset / seek)
• CountdownLocalizations delegate with English, Spanish and French defaults
• Sound notifications via audioplayers (optional, off by default)
• Haptic feedback only: replaced external vibration package, now uses Flutter’s built-in HapticFeedback
• Example: new controller_demo.dart showcasing controller + i18n

🛠 Changed #

• Removed vibration dependency from the core package and example app

🧹 Fixed #

• Wrong import paths in example project when used as path dependency

Migration guide #

No breaking changes. Just flutter pub upgrade flutter_advanced_countdown and you can:

final controller = CountdownTimerController();
AdvancedCountdownTimer(controller: controller, ...);

🚀 Major Enhancements #

New Professional Display Styles

• Digital Display: Segmented digital display with monospace font
• Analog Display: Clock-style display with animated hands and progress arc
• Progress Bar Display: Linear progress bar with time overlay and percentage
• Floating Display: Circular floating action button style
• Notification Display: Badge-style notification display
• Custom Display: Complete custom builder support for unlimited customization

Advanced Animation System

• Pulse Animation: Automatic pulse when time is low (configurable threshold)
• Shake Animation: Shake effect when timer finishes
• Scale Animations: Smooth scale transitions on state changes
• Fade Transitions: Elegant fade in/out animations
• Custom Animation Curves: Support for all Flutter animation curves
• Custom Animation Builders: Complete control over animation behavior
• Performance Optimized: Proper disposal and memory management

Professional Theme System

• Professional Theme: Modern theme with shadows, animations, and rounded corners
• Glass Morphism Theme: Blur effects with transparency and borders
• Minimal Theme: Clean, borderless design for minimal interfaces
• Enhanced Gradient Themes: Improved gradient support with custom colors
• Advanced Styling: Custom decorations, constraints, and transforms
• Semantic Labels: Accessibility support with custom labels

Advanced Customization

• Custom Builder Configuration: Complete UI control with custom builders
• Advanced Styling Configuration: Custom borders, shapes, and transforms
• Custom Constraints: Width, height, min/max sizing options
• Custom Decorations: Background and foreground decorations
• Custom Animation Configuration: Fine-grained animation control
• Low Time Warnings: Visual indicators with custom thresholds
• Auto-hide Functionality: Automatic hiding when timer finishes

Enhanced User Experience

• Vibration Feedback: Platform-specific vibration support
• Sound Notifications: Audio integration for timer completion
• Enhanced Haptic Feedback: Improved haptic patterns
• Progress Tracking: Built-in progress calculation and display
• State Management: Improved ChangeNotifier integration
• Error Handling: Comprehensive error handling and validation

✨ New Features #

Animation Configuration

CountdownAnimationConfig(
  enabled: true,
  duration: Duration(milliseconds: 500),
  curve: Curves.bounceOut,
  enablePulseAnimation: true,
  pulseThreshold: 15,
  enableShakeAnimation: true,
  enableScaleAnimation: true,
  enableFadeAnimation: true,
  customAnimationBuilder: (child, animation) => // custom animation
)

Custom Builder Configuration

CountdownCustomBuilderConfig(
  timeBuilder: (context, remaining, isRunning, isPaused) => // custom time display
  controlsBuilder: (context, onPause, onResume, onReset) => // custom controls
  progressBuilder: (context, progress, remaining, total) => // custom progress
  backgroundBuilder: (context, child) => // custom background
  containerBuilder: (context, child) => // custom container
  iconBuilder: (context, icon, color, size) => // custom icons
)

Advanced Styling

CountdownAdvancedStyle(
  border: Border.all(color: Colors.blue),
  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
  alignment: Alignment.center,
  constraints: BoxConstraints(maxWidth: 200),
  transform: Matrix4.rotationZ(0.1),
  semanticLabel: 'Custom timer',
)

Professional Themes

// Professional theme with shadows and animations
CountdownTheme.professional(
  primaryColor: Colors.indigo,
  enableAnimations: true,
  enableShadows: true,
  enableRoundedCorners: true,
)

// Glass morphism theme
CountdownTheme.glassMorphism(
  primaryColor: Colors.white,
  blurRadius: 15.0,
)

// Minimal theme
CountdownTheme.minimal(
  primaryColor: Colors.teal,
  enableBorders: false,
)

🔧 Enhanced Widget Properties #

New Animation Properties

• animationConfig: Custom animation configuration
• customBuilderConfig: Custom builder configuration
• advancedStyle: Advanced styling configuration
• decoration: Custom decoration
• foregroundDecoration: Custom foreground decoration
• width, height, minWidth, minHeight, maxWidth, maxHeight: Custom constraints

New Display Properties

• showTimeUnits: Show time unit labels
• timeUnitLabels: Custom time unit labels
• enableSoundNotifications: Enable sound notifications
• customSoundPath: Custom sound file path
• showLowTimeWarning: Show warning when time is low
• lowTimeWarningThreshold: Low time warning threshold
• warningColor: Custom warning color
• autoHideWhenFinished: Auto-hide when timer finishes
• autoHideDelay: Auto-hide delay duration
• enableVibrationFeedback: Enable vibration feedback
• vibrationPattern: Custom vibration pattern

📱 Responsive Enhancements #

Improved Responsive System

• Better Device Detection: Enhanced phone/tablet/desktop detection
• Optimized Breakpoints: Improved responsive breakpoints
• Caching System: Performance optimization with value caching
• Custom Responsive Themes: Breakpoint-specific configurations
• Responsive Animation Config: Animation settings per screen size

New Responsive Configurations

CountdownTheme.responsive(
  primaryColor: Colors.blue,
  fontConfig: ResponsiveFontConfig(xs: 14, sm: 16, md: 18, lg: 20, xl: 22),
  paddingConfig: ResponsivePaddingConfig(xs: EdgeInsets.all(8), ...),
  iconConfig: ResponsiveIconConfig(xs: 16, sm: 18, md: 20, lg: 24, xl: 28),
  animationConfig: CountdownAnimationConfig(...),
)

🎯 Professional Examples #

Comprehensive Example App

• Professional Themes Section: Showcasing all new theme types
• New Display Styles Section: Demonstrating all 13 display styles
• Advanced Animations Section: Animation configuration examples
• Custom Builders Section: Complete custom UI examples
• Advanced Styling Section: Custom decoration and constraint examples
• Responsive Examples Section: Device-specific demonstrations
• Provider Integration Section: State management examples

🧪 Testing & Quality #

Enhanced Testing

• Unit Tests: Comprehensive test coverage for all new features
• Widget Tests: UI component testing for new display styles
• Animation Tests: Animation behavior validation
• Responsive Tests: Device-specific behavior testing
• Custom Builder Tests: Custom builder functionality testing

📚 Documentation #

Complete Documentation Update

• Professional Features Section: Detailed feature documentation
• Advanced Animations Guide: Animation configuration guide
• Custom Builders Guide: Custom UI implementation guide
• Professional Themes Guide: Theme customization guide
• Advanced Styling Guide: Custom styling implementation
• Responsive Design Guide: Device-specific customization
• API Reference: Complete API documentation with examples

🔄 Migration Guide #

From Version 1.0.0

• No Breaking Changes: All existing code continues to work
• New Features: All new features are optional and backward compatible
• Enhanced Themes: Existing themes work with new professional themes
• Improved Responsive: Better responsive behavior with existing code
• Animation Upgrades: Existing animations work with new animation system

🎨 Design Improvements #

Visual Enhancements

• Modern Design Language: Material Design 3 principles
• Professional Shadows: Layered shadow system
• Smooth Animations: 60fps animations with proper curves
• Accessibility: Improved semantic labels and contrast
• Performance: Optimized rendering and memory usage

📊 Performance Optimizations #

Technical Improvements

• Memory Management: Proper disposal of animation controllers
• Efficient Rebuilds: Minimal widget rebuilds with ChangeNotifier
• Responsive Caching: Cached responsive values for performance
• Animation Optimization: Efficient animation system
• Rendering Optimization: Optimized custom painting

Added #

• Full Responsive Design: Complete responsive support for all devices (iPhone, iPad, Android, Desktop)
• ResponsiveUtils Class: Built-in utilities for device detection and responsive sizing
• Device Type Detection: Automatic detection of phone, tablet, and desktop devices
• Screen Size Categories: XS, SM, MD, LG, XL breakpoint system
• Responsive Font Sizing: Automatic font size adjustment based on screen size
• Responsive Padding: Dynamic padding adjustment for different screen sizes
• Responsive Icon Sizing: Icon size optimization for each device type
• Responsive Circular Progress: Circular progress indicator sizing for all devices
• Responsive Border Radius: Dynamic border radius based on screen size
• Responsive Spacing: Intelligent spacing system for different screen sizes
• Custom Responsive Themes: Advanced theme configuration with responsive options
• ResponsiveFontConfig: Configuration class for custom responsive font sizes
• ResponsivePaddingConfig: Configuration class for custom responsive padding
• ResponsiveIconConfig: Configuration class for custom responsive icon sizes
• useResponsiveSizing Parameter: Option to enable/disable responsive sizing (default: true)
• CountdownTheme.responsive(): Factory constructor for responsive themes
• Enhanced Example App: Updated example with responsive demonstrations
• Device Information Display: Example showing current device and screen information
• Responsive Breakpoints Documentation: Clear documentation of responsive breakpoints
• Cross-Platform Support: Verified support for iOS, Android, Desktop, and Web
• Initial release of the Countdown Timer Package
• AdvancedCountdownTimer widget with multiple display styles
• CountdownTimerProvider for state management
• CountdownConfig for configuration management
• CountdownTheme for theming support
• TimeFormatter utility class for time formatting
• HapticFeedback utility class for haptic feedback
• Duration extensions for convenience methods
• Multiple display styles: compact, detailed, circular, minimal, bottom bar
• Theme support: light, dark, and gradient themes
• Interactive controls: pause, resume, and reset functionality
• Custom formatters for time display
• Progress tracking and percentage calculation
• Error handling and validation
• Comprehensive documentation and examples
• Unit tests for all components

Changed #

• Default Responsive Behavior: All timers now use responsive sizing by default
• Font Size Calculation: Replaced hardcoded font sizes with responsive calculations
• Padding System: Updated padding to use responsive sizing
• Icon Size System: Icons now scale appropriately for different screen sizes
• Circular Progress Sizing: Circular progress indicators now adapt to screen size
• Border Radius: Border radius now scales with screen size
• Spacing System: All spacing now uses responsive calculations
• Theme System: Enhanced theme system with responsive configuration options
• Documentation: Completely updated README with responsive design documentation
• Example App: Redesigned example app to showcase responsive features

Improved #

• iPhone Support: Optimized for all iPhone screen sizes
• iPad Support: Enhanced tablet experience with appropriate sizing
• Android Support: Improved Android phone and tablet compatibility
• Desktop Support: Better desktop experience with larger UI elements
• Web Support: Responsive web design for browser compatibility
• Performance: Optimized responsive calculations with caching
• Code Organization: Better separation of responsive logic
• Type Safety: Improved type safety for responsive configurations

Technical Details #

• Breakpoints: XS (<480px), SM (480-768px), MD (768-1024px), LG (1024-1440px), XL (>1440px)
• Device Detection: Uses screen size and pixel ratio for accurate device type detection
• Caching: Responsive values are cached for performance optimization
• Backward Compatibility: All existing code continues to work with new responsive features
• Customization: Full control over responsive behavior through theme configuration

Migration Guide #

• No Breaking Changes: Existing code will work without modifications
• Responsive by Default: New timers automatically use responsive sizing
• Disable Responsive: Set useResponsiveSizing: false to use fixed sizes
• Custom Responsive: Use CountdownTheme.responsive() for advanced customization
• Flutter SDK: >=3.10.0
• Dart SDK: >=3.0.0
• Dependencies: flutter (only)
• Platform Support: iOS, Android, Web, Desktop

Documentation #

• Comprehensive README with usage examples
• API reference documentation
• Code examples for all features
• Unit tests for all components
• Example app demonstrating all features

[Unreleased] #

Planned Features #

• Additional display styles (digital, analog, etc.)
• Sound notifications
• Multiple timer support
• Timer presets
• Background timer support
• Widget tests
• Integration tests
• Performance optimizations
• Additional theme presets
• Localization support

Added #

• Initial release with basic countdown timer functionality
• Multiple display styles (compact, detailed, circular, minimal, bottom bar)
• Theme support (light, dark, gradient)
• Provider integration for state management
• Haptic feedback support
• Custom formatters and builders
• Progress tracking and percentage display
• Auto-start and control options
• Error handling and validation

Features #

• Advanced countdown timer widget
• CountdownTimerProvider for state management
• TimeFormatter utilities
• Duration extensions
• Haptic feedback utilities
• Comprehensive theming system
• Multiple display styles
• Interactive controls
• Custom styling options