Flutter Fluid Fill Animation code

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import 'dart:async'; import 'dart:math'; import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; void main() { runApp( ChangeNotifierProvider<AnimationData>( create: (context) => AnimationData(), builder: (context, child) => const MyApp(), ), ); } class AnimationData extends ChangeNotifier { double _percentage = 0.0; bool _isAnimationRunning = false; double get percentage => _percentage; bool get isAnimationRunning => _isAnimationRunning; set percentage(double value) { _percentage = value; notifyListeners(); } void startAnimation() { if (_isAnimationRunning) return; _isAnimationRunning = true; Timer.periodic(const Duration(milliseconds: 30), (timer) { if (_percentage < 1.0) { _percentage += 0.01; notifyListeners(); } else { timer.cancel(); _isAnimationRunning = false; } }); } void resetAnimation() { _percentage = 0.0; notifyListeners(); } } class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return MaterialApp( title: 'Fluid Fill Animation', theme: ThemeData(primarySwatch: Colors.blue), home: const MyHomePage(), ); } } class MyHomePage extends StatefulWidget { const MyHomePage({Key? key}) : super(key: key); @override State<MyHomePage> createState() => _MyHomePageState(); } class _MyHomePageState extends State<MyHomePage> { @override void initState() { super.initState(); WidgetsBinding.instance.addPostFrameCallback((_) { Provider.of<AnimationData>(context, listen: false).startAnimation(); }); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: const Text('Fluid Fill Animation')), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ const FluidCircle(), const SizedBox(height: 20), Row( mainAxisAlignment: MainAxisAlignment.center, children: [ ElevatedButton( onPressed: () { Provider.of<AnimationData>( context, listen: false, ).startAnimation(); }, child: const Text('Start Animation'), ), const SizedBox(width: 20), ElevatedButton( onPressed: () { Provider.of<AnimationData>( context, listen: false, ).resetAnimation(); }, child: const Text('Reset Animation'), ), ], ), ], ), ), ); } } class FluidCircle extends StatelessWidget { const FluidCircle({Key? key}) : super(key: key); @override Widget build(BuildContext context) { final animationData = Provider.of<AnimationData>(context); return CustomPaint( painter: FluidPainter(animationData.percentage), size: const Size(200, 200), ); } } class FluidPainter extends CustomPainter { final double percentage; FluidPainter(this.percentage); @override void paint(Canvas canvas, Size size) { final center = size.center(Offset.zero); final radius = size.width / 2; // Define the wave parameters final waveAmplitude = radius / 20; final waveFrequency = 5.0; // Calculate the current water level final waterLevel = radius - (radius * 2 * percentage); // Create the path for the filled portion with wave effect final filledPath = Path(); // Move to the starting point on the left, start from above the circle to avoid unfilled area filledPath.moveTo(0, center.dy + waterLevel - waveAmplitude); // Draw the wave for (double x = 0; x <= size.width; x += 1) { final y = center.dy + waterLevel + waveAmplitude * sin(waveFrequency * (x / radius) + percentage * 2 * pi); filledPath.lineTo(x, y); } // Complete the path to close the filled area filledPath.lineTo(size.width, size.height); filledPath.lineTo(0, size.height); filledPath.close(); // Clip the path to the circle canvas.clipPath( Path()..addOval(Rect.fromCircle(center: center, radius: radius)), ); // Draw the filled portion final filledPaint = Paint()..color = Colors.blue; canvas.drawPath(filledPath, filledPaint); // Draw the circle outline final circlePaint = Paint() ..color = Colors.blue ..style = PaintingStyle.stroke ..strokeWidth = 4; canvas.drawCircle(center, radius, circlePaint); // Draw the percentage text final textPainter = TextPainter( text: TextSpan( text: '${(percentage * 100).toStringAsFixed(0)}%', style: TextStyle( color: (percentage * 100) > 50 ? Colors.white : Colors.grey, fontSize: 24, ), ), textDirection: TextDirection.ltr, textAlign: TextAlign.center, ); textPainter.layout(minWidth: size.width, maxWidth: size.width); textPainter.paint( canvas, center - Offset(textPainter.width / 2, textPainter.height / 2), ); } @override bool shouldRepaint(covariant FluidPainter oldDelegate) { return oldDelegate.percentage != percentage; } }

Flutter UI - Profile Page

 // ignore_for_file: prefer_const_constructors

import 'package:flutter/material.dart'; import 'TCustomCurvedEdges.dart'; class ProfileScreen2 extends StatefulWidget { const ProfileScreen2({super.key}); @override State<ProfileScreen2> createState() => _ProfileScreen2State(); } class _ProfileScreen2State extends State<ProfileScreen2> { @override Widget build(BuildContext context) { return Scaffold( body: SingleChildScrollView( child: Column( children: [ ClipPath( clipper: TCustomCurvedEdges(), child: Container( // color: const Color.fromARGB(255, 75, 104, 255), color: Colors.red[300], padding: const EdgeInsets.all(0), child: SizedBox( height: 300, child: Stack( children: [ // 3 LEFT side curves Positioned( top: 0, left: -210, child: Container( width: 300, height: 300, decoration: BoxDecoration( borderRadius: BorderRadius.circular(300), color: Colors.white.withOpacity(0.1))), ), Positioned( top: 0, left: -240, child: Container( width: 300, height: 300, decoration: BoxDecoration( borderRadius: BorderRadius.circular(300), color: Colors.white.withOpacity(.1))), ), Positioned( top: 0, left: -270, child: Container( width: 300, height: 300, decoration: BoxDecoration( borderRadius: BorderRadius.circular(300), color: Colors.white.withOpacity(.1))), ), // 3 RIGHT side curves Positioned( top: 0, right: -210, child: Container( width: 300, height: 300, decoration: BoxDecoration( borderRadius: BorderRadius.circular(300), color: Colors.white.withOpacity(0.1))), ), Positioned( top: 0, right: -240, child: Container( width: 300, height: 300, decoration: BoxDecoration( borderRadius: BorderRadius.circular(300), color: Colors.white.withOpacity(.1))), ), Positioned( top: 0, right: -270, child: Container( width: 300, height: 300, decoration: BoxDecoration( borderRadius: BorderRadius.circular(300), color: Colors.white.withOpacity(.1))), ), // Bottom Curve - try with -10, -150 // Positioned( // bottom: -150, // child: Container( // width: MediaQuery.of(context).size.width, // height: 300, // decoration: BoxDecoration( // borderRadius: BorderRadius.circular(300), // color: Colors.white.withOpacity(.2))), // ), // Circle Avatar Container( width: double.infinity, child: Column( mainAxisAlignment: MainAxisAlignment.center, children: const [ CircleAvatar( radius: 60, backgroundImage: NetworkImage( "https://randomuser.me/api/portraits/men/46.jpg")), SizedBox( height: 10, ), Text( "Pratap Kumar", style: TextStyle( color: Colors.white, fontWeight: FontWeight.w600, fontSize: 17), ) ], ), ), ], )), ), ), Column( children: [ ListTile( leading: Icon(Icons.person_4), title: Text("Profile"), trailing: Icon( Icons.arrow_forward_ios, size: 14, ), onTap: () { print("Profile"); }, ), ListTile( leading: Icon(Icons.security), title: Text("Change Password"), trailing: Icon( Icons.arrow_forward_ios, size: 14, ), onTap: () { print("Change Password"); }, ), ListTile( leading: Icon(Icons.lock), title: Text("Privacy Policy"), trailing: Icon( Icons.arrow_forward_ios, size: 14, ), onTap: () { print("Privacy "); }, ), ListTile( leading: Icon(Icons.help_center), title: Text("Help Center"), trailing: Icon( Icons.arrow_forward_ios, size: 14, ), onTap: () { print("Help Center "); }, ), ListTile( leading: Icon(Icons.star), title: Text("Rate Us"), trailing: Icon( Icons.arrow_forward_ios, size: 14, ), onTap: () { print("Help Center "); }, ), ListTile( leading: Icon(Icons.settings), title: Text("Settings"), trailing: Icon( Icons.arrow_forward_ios, size: 14, ), onTap: () { print("Settings "); }, ), ListTile( leading: Icon(Icons.logout), title: Text( "Logout", style: TextStyle( fontWeight: FontWeight.w500, color: Colors.red, ), ), trailing: Icon( Icons.arrow_forward_ios, size: 14, ), onTap: () { print("Logout "); }, ), ], ) ], )), ); } }

TCustomCurvedEdges.dart

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import 'package:flutter/material.dart'; class TCustomCurvedEdges extends CustomClipper<Path> { @override Path getClip(Size size) { var path = Path(); path.lineTo(0, size.height); final firstCurve = Offset(0, size.height - 20); final lastCurve = Offset(30, size.height - 20); path.quadraticBezierTo( firstCurve.dx, firstCurve.dy, lastCurve.dx, lastCurve.dy); final secondFirstCurve = Offset(0, size.height - 20); final secondLastCurve = Offset(size.width - 30, size.height - 20); path.quadraticBezierTo(secondFirstCurve.dx, secondFirstCurve.dy, secondLastCurve.dx, secondLastCurve.dy); final thirdFirstCurve = Offset(size.width, size.height - 20); final thirdLastCurve = Offset(size.width, size.height); path.quadraticBezierTo(thirdFirstCurve.dx, thirdFirstCurve.dy, thirdLastCurve.dx, thirdLastCurve.dy); path.lineTo(size.width, 0); path.close(); return path; } @override bool shouldReclip(covariant CustomClipper<Path> oldClipper) { return true; } }

Screenshot:

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Flutter Bottom Navigation UI

CurvedBottomBarM3.dart

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import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; import 'package:flutter_ui_screens/screens/bottombar/SampleTestScreen.dart'; class CurvedBottomBarM3 extends StatefulWidget { @override _CurvedBottomBarM3State createState() => _CurvedBottomBarM3State(); } class _CurvedBottomBarM3State extends State<CurvedBottomBarM3> { int _selectedIndex = 0; void _onItemTapped(int index) { setState(() { _selectedIndex = index; }); } _getBody() { switch (_selectedIndex) { case 0: return SampleTestPage("Home"); case 1: return SampleTestPage("Search"); case 2: return SampleTestPage("Cart"); case 3: return SampleTestPage("Wishlist"); case 4: return SampleTestPage("Profile"); default: return Container(color: Colors.red); } } Widget buildTabItem( {required IconData icon, required String label, required int index}) { final isSelected = _selectedIndex == index; return Column( mainAxisSize: MainAxisSize.min, children: [ SizedBox( height: 30, width: 30, child: IconButton( padding: const EdgeInsets.all(0), icon: Icon(icon), onPressed: () => _onItemTapped(index), color: isSelected ? Colors.red : Colors.grey, ), ), Text( label, style: TextStyle( fontSize: 11, color: isSelected ? Colors.red : Colors.grey, ), ), Container(height: 3), Container( decoration: BoxDecoration( color: index == _selectedIndex ? Colors.red : Colors.transparent, shape: BoxShape.circle, ), height: 5, width: 5, ), ], ); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( elevation: 2, title: const Text("Custom Bottom Navigation"), ), body: _getBody(), bottomNavigationBar: BottomAppBar( shape: const CircularNotchedRectangle(), color: Colors.white, notchMargin: 8, // Increased notch margin child: Padding( padding: const EdgeInsets.symmetric(horizontal: 15.0), child: Row( mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[ buildTabItem(icon: CupertinoIcons.home, label: "Home", index: 0), buildTabItem( icon: CupertinoIcons.search, label: "Search", index: 1), SizedBox(width: 40), // Spacing for the floating button buildTabItem( icon: CupertinoIcons.heart, label: "Wishlist", index: 2), buildTabItem( icon: CupertinoIcons.settings, label: "Settings", index: 3), ], ), ), ), floatingActionButtonLocation: FloatingActionButtonLocation .centerDocked, // Changed from centerDocked to centerFloat floatingActionButton: Stack( alignment: Alignment.center, children: [ // Custom shadow using a Container Container( width: 60, height: 60, decoration: BoxDecoration( shape: BoxShape.circle, boxShadow: [ BoxShadow( color: Colors.red.withOpacity(0.3), // Shadow color spreadRadius: 8, blurRadius: 15, ), ], ), ), // FloatingActionButton on top FloatingActionButton( shape: CircleBorder(), onPressed: () { // Action for the FAB }, child: Icon( Icons.shopping_basket, color: Colors.white, ), backgroundColor: Colors.red, elevation: 0, // Set to 0 to avoid default shadow ), ], ), ); } }

SampleTestPage.dart

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import 'package:flutter/material.dart'; class SampleTestPage extends StatefulWidget { String pageTitle; SampleTestPage(this.pageTitle, {super.key}); @override State<SampleTestPage> createState() => _SampleTestPageState(); } class _SampleTestPageState extends State<SampleTestPage> { @override Widget build(BuildContext context) { return Scaffold( body: Container( child: Center( child: Text( widget.pageTitle, style: const TextStyle(fontSize: 14, fontWeight: FontWeight.w300), )), ), ); } }

Customise bottom bar tab item selection based on requirement using this buildTabItem code

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Screenshots

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