100 lines
2.7 KiB
Dart
100 lines
2.7 KiB
Dart
import 'package:fluent_ui/fluent_ui.dart';
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class TypingIndicator extends StatefulWidget {
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const TypingIndicator({super.key});
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@override
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State<TypingIndicator> createState() => _TypingIndicatorState();
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}
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class _TypingIndicatorState extends State<TypingIndicator>
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with TickerProviderStateMixin {
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late List<AnimationController> _controllers;
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late List<Animation<double>> _animations;
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@override
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void initState() {
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super.initState();
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_controllers = List.generate(
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3,
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(index) => AnimationController(
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duration: const Duration(milliseconds: 600),
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vsync: this,
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),
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);
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_animations = _controllers.map((controller) {
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return Tween<double>(
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begin: 0,
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end: -8,
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).animate(CurvedAnimation(parent: controller, curve: Curves.easeInOut));
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}).toList();
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for (int i = 0; i < _controllers.length; i++) {
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Future.delayed(Duration(milliseconds: i * 150), () {
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if (mounted) {
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_controllers[i].repeat(reverse: true);
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}
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});
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}
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}
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@override
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void dispose() {
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for (var controller in _controllers) {
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controller.dispose();
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}
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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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final theme = FluentTheme.of(context);
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return Padding(
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padding: const EdgeInsets.only(bottom: 16),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Container(
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width: 36,
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height: 36,
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decoration: BoxDecoration(
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color: theme.accentColor,
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borderRadius: BorderRadius.circular(8),
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),
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child: const Icon(FluentIcons.robot, color: Colors.white, size: 18),
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),
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const SizedBox(width: 12),
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Card(
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padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: List.generate(3, (index) {
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return AnimatedBuilder(
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animation: _animations[index],
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builder: (context, child) {
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return Transform.translate(
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offset: Offset(0, _animations[index].value),
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child: child,
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);
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},
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child: Container(
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margin: EdgeInsets.only(right: index < 2 ? 6 : 0),
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width: 8,
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height: 8,
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decoration: BoxDecoration(
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color: theme.accentColor,
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shape: BoxShape.circle,
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),
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),
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);
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}),
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),
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),
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],
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),
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);
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}
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}
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