93042cbb4c
Full quiz flow s01-s20: splash, intro, value prop, social proof, name/skin-type/age/concerns/goal quiz with insights, analysing loader, result with skin score, AM/PM routines, ingredient science, signup, welcome. Duolingo-style design: flat cards, pressable SButton (Stack trick), 4px progress bar, mascot moods (wave/think/analyze/celebrate), confetti on result+welcome, personalized content throughout.
101 lines
2.4 KiB
Dart
101 lines
2.4 KiB
Dart
import 'dart:math';
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import 'package:flutter/material.dart';
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class ConfettiOverlay extends StatefulWidget {
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const ConfettiOverlay({super.key});
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@override
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State<ConfettiOverlay> createState() => _ConfettiOverlayState();
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}
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class _ConfettiOverlayState extends State<ConfettiOverlay>
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with SingleTickerProviderStateMixin {
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late AnimationController _ctrl;
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final _rand = Random();
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late List<_Particle> _particles;
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@override
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void initState() {
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super.initState();
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_particles = List.generate(40, (_) => _Particle(_rand));
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_ctrl = AnimationController(
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vsync: this,
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duration: const Duration(milliseconds: 2400),
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)..forward();
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}
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@override
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void dispose() {
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_ctrl.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return AnimatedBuilder(
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animation: _ctrl,
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builder: (_, __) => CustomPaint(
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painter: _ConfettiPainter(_particles, _ctrl.value),
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size: Size.infinite,
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),
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);
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}
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}
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class _Particle {
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final double x;
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double y;
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final double speed;
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final double size;
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final Color color;
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final double rotation;
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final double rotSpeed;
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_Particle(Random r)
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: x = r.nextDouble(),
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y = -0.1 - r.nextDouble() * 0.3,
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speed = 0.3 + r.nextDouble() * 0.5,
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size = 6 + r.nextDouble() * 8,
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color = [
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const Color(0xFF5B4FCF),
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const Color(0xFFFF7EB3),
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const Color(0xFFFFD700),
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const Color(0xFF4CAF50),
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const Color(0xFF1CB0F6),
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const Color(0xFFFF7043),
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][r.nextInt(6)],
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rotation = r.nextDouble() * 2 * pi,
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rotSpeed = (r.nextDouble() - 0.5) * 6;
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}
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class _ConfettiPainter extends CustomPainter {
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final List<_Particle> particles;
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final double t;
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_ConfettiPainter(this.particles, this.t);
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@override
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void paint(Canvas canvas, Size size) {
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for (final p in particles) {
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final y = (p.y + t * p.speed) * size.height;
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if (y > size.height) continue;
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final x = p.x * size.width;
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final rot = p.rotation + t * p.rotSpeed;
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canvas.save();
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canvas.translate(x, y);
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canvas.rotate(rot);
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final paint = Paint()..color = p.color;
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canvas.drawRect(
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Rect.fromCenter(center: Offset.zero, width: p.size, height: p.size * 0.5),
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paint,
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);
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canvas.restore();
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}
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}
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@override
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bool shouldRepaint(_ConfettiPainter old) => old.t != t;
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}
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