Hydro Glass Nav Bar #

A beautiful, Apple-style hydro glass floating navigation bar with advanced physics-based animations for Flutter. Create stunning, premium navigation experiences with hydro glass morphism, draggable indicators, and expandable floating action buttons.

✨ Features #

• 🌊 Hydro Glass Morphism - Stunning visual effect with refraction, blur, and glass glow
• 🎯 Draggable Indicator - Swipe between items with smooth, physics-based animations
• 🧲 iOS-style Physics - Rubber band resistance and jelly transform effects
• ➕ Expandable FAB - Optional floating action button with action menu
• 🎨 Theme Adaptive - Automatic dark/light mode support
• ♿ Accessible - Full semantic label support for screen readers
• 📳 Haptic Feedback - Tactile response on interactions
• ⚡ Performance Optimized - RepaintBoundary and efficient rendering
• 🎭 Fallback Mode - Works without hydro glass effect for older devices

📦 Installation #

Add the package to your pubspec.yaml:

dependencies:
  hydro_glass_nav_bar: ^1.0.0-pre.1

Then run:

flutter pub get

🚀 Quick Start #

import 'package:hydro_glass_nav_bar/hydro_glass_nav_bar.dart';

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage>
    with SingleTickerProviderStateMixin {
  late TabController _tabController;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 3, vsync: this);
  }

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: [
          // Your page content
          TabBarView(
            controller: _tabController,
            children: [
              Center(child: Text('Home')),
              Center(child: Text('Search')),
              Center(child: Text('Profile')),
            ],
          ),
          
          // The hydro glass nav bar
          HydroGlassNavBar(
            controller: _tabController,
            items: [
              HydroGlassNavItem(
                label: 'Home',
                icon: Icons.home_outlined,
                selectedIcon: Icons.home,
              ),
              HydroGlassNavItem(
                label: 'Search',
                icon: Icons.search,
              ),
              HydroGlassNavItem(
                label: 'Profile',
                icon: Icons.person_outline,
                selectedIcon: Icons.person,
              ),
            ],
          ),
        ],
      ),
    );
  }
}

📖 Components #

HydroGlassNavBar #

The main widget that creates the floating navigation bar.

HydroGlassNavItem #

Configuration for individual navigation items.

HydroGlassNavItem(
  label: 'Home',           // Required: Item label
  icon: Icons.home_outlined, // Required: Default icon
  selectedIcon: Icons.home,  // Optional: Icon when selected
  glowColor: Colors.blue,    // Optional: Custom glow color
)

HydroGlassNavBarFABConfig #

Configuration for the expandable floating action button.

HydroGlassNavBarFABConfig(
  icon: Icons.more_vert,
  semanticLabel: 'Actions menu',
  size: 56, // Default: 56
  actions: [
    HydroGlassNavBarAction(
      icon: Icons.share,
      label: 'Share',
      onTap: () => handleShare(),
    ),
    HydroGlassNavBarAction(
      icon: Icons.delete,
      label: 'Delete',
      onTap: () => handleDelete(),
      isDanger: true, // Shows in error color
    ),
  ],
)

🎨 Selection Mode with FAB #

Create a powerful selection experience with the built-in FAB:

class _MyPageState extends State<MyPage> {
  final ValueNotifier<int> _selectedCount = ValueNotifier(0);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: [
          // Your selectable content
          GridView.builder(
            itemBuilder: (context, index) {
              return GestureDetector(
                onLongPress: () {
                  // Toggle selection
                  _selectedCount.value++;
                },
                child: YourItemWidget(),
              );
            },
          ),
          
          // Nav bar with FAB
          HydroGlassNavBar(
            controller: _tabController,
            items: [...],
            selectedItemsCount: _selectedCount, // FAB appears when > 0
            fabConfig: HydroGlassNavBarFABConfig(
              icon: Icons.more_vert,
              actions: [
                HydroGlassNavBarAction(
                  icon: Icons.share,
                  label: 'Share Selected',
                  onTap: () => shareItems(),
                ),
                HydroGlassNavBarAction(
                  icon: Icons.delete,
                  label: 'Delete Selected',
                  onTap: () {
                    deleteItems();
                    _selectedCount.value = 0;
                  },
                  isDanger: true,
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

🔧 Fallback Mode #

For devices that don't support the hydro glass effect, or for performance optimization:

HydroGlassNavBar(
  controller: _tabController,
  items: [...],
  useLiquidGlass: false, // Uses gradient background instead
)

🧪 Physics Utilities #

The package exposes HydroGlassNavBarPhysics for custom implementations:

// iOS-style rubber band resistance
final adjusted = HydroGlassNavBarPhysics.applyRubberBandResistance(
  1.2, // value beyond 0-1 range
  resistance: 0.4,
  maxOverdrag: 0.3,
);

// Jelly transform for squash-and-stretch
final transform = HydroGlassNavBarPhysics.buildJellyTransform(
  velocity: 5.0,
  maxDistortion: 0.8,
);

// Convert item index to alignment
final alignment = HydroGlassNavBarPhysics.computeAlignment(1, 3);
// Returns 0.0 (center for 3 items)

📱 Requirements #

• Flutter SDK: >=3.24.0
• Dart SDK: >=3.5.0

📄 Dependencies #

• liquid_glass_renderer - For the hydro glass morphism effect
• motor - For physics-based spring animations

🤝 Contributing #

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📜 License #

This project is licensed under the MIT License - see the LICENSE file for details.

☕ Support #

If you find this package helpful, consider supporting my work:

Your support helps me maintain and improve this package! 🙏

🙏 Credits #

Created by Kamal Ayman

Made with ❤️ and Flutter