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Anim Example With Sequence
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import 'package:flutter/material.dart'; | |
void main() { | |
runApp(const MyApp()); | |
} | |
class MyApp extends StatelessWidget { | |
const MyApp({super.key}); | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
theme: ThemeData.light().copyWith( | |
scaffoldBackgroundColor: Colors.white, | |
), | |
debugShowCheckedModeBanner: false, | |
home: const RateScreen(), | |
); | |
} | |
} | |
class RateScreen extends StatefulWidget { | |
const RateScreen({super.key}); | |
@override | |
State<RateScreen> createState() => _RateScreenState(); | |
} | |
class _RateScreenState extends State<RateScreen> { | |
@override | |
Widget build(BuildContext context) { | |
return Scaffold( | |
body: Stack( | |
children: [ | |
Positioned( | |
top: 250, | |
left: 0, | |
right: 0, | |
bottom: 0, | |
child: Container( | |
decoration: const BoxDecoration( | |
borderRadius: BorderRadius.only( | |
topLeft: Radius.circular(16), | |
topRight: Radius.circular(16), | |
), | |
color: Colors.black87, | |
), | |
padding: const EdgeInsets.symmetric(horizontal: 16), | |
child: Column( | |
mainAxisSize: MainAxisSize.max, | |
mainAxisAlignment: MainAxisAlignment.end, | |
children: [ | |
SizedBox( | |
height: 100, | |
child: Container( | |
decoration: BoxDecoration( | |
borderRadius: BorderRadius.circular(16), | |
color: Colors.white54, | |
), | |
), | |
), | |
const SizedBox(height: 10), | |
SizedBox( | |
height: 25, | |
child: Container( | |
decoration: BoxDecoration( | |
borderRadius: BorderRadius.circular(16), | |
color: Colors.white54, | |
), | |
), | |
), | |
const SizedBox(height: 50), | |
const _AnimatedButton(), | |
const SizedBox(height: 24), | |
], | |
), | |
), | |
) | |
], | |
), | |
); | |
} | |
} | |
class _AnimatedButton extends StatefulWidget { | |
const _AnimatedButton(); | |
@override | |
State<_AnimatedButton> createState() => _AnimatedButtonState(); | |
} | |
class _AnimatedButtonState extends State<_AnimatedButton> | |
with SingleTickerProviderStateMixin<_AnimatedButton> { | |
late final _controller = AnimationController( | |
vsync: this, | |
duration: Durations.medium4, | |
value: 0, | |
)..repeat(reverse: true); | |
late final _offsetSeq = TweenSequence<Offset>( | |
[ | |
TweenSequenceItem( | |
tween: ConstantTween(Offset.zero), | |
weight: 70, | |
), | |
TweenSequenceItem( | |
tween: Tween<Offset>( | |
begin: const Offset(0, 0), | |
end: const Offset(5, 0), | |
), | |
weight: 10, | |
), | |
TweenSequenceItem( | |
tween: Tween<Offset>( | |
begin: const Offset(5, 0), | |
end: const Offset(-5, 0), | |
), | |
weight: 10, | |
), | |
TweenSequenceItem( | |
tween: Tween<Offset>( | |
begin: const Offset(-5, 0), | |
end: const Offset(0, 0), | |
), | |
weight: 10, | |
), | |
], | |
).animate(_controller); | |
@override | |
void initState() { | |
super.initState(); | |
_controller.addListener(_update); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return Transform.translate( | |
offset: _offsetSeq.value, | |
child: ElevatedButton( | |
style: ElevatedButton.styleFrom( | |
backgroundColor: Colors.amber, | |
), | |
onPressed: () {}, | |
child: const Text('Оценить заказ'), | |
), | |
); | |
} | |
@override | |
void dispose() { | |
_controller.removeListener(_update); | |
_controller.dispose(); | |
super.dispose(); | |
} | |
void _update() { | |
setState(() {}); | |
} | |
} |
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