class LogoWidget extends StatelessWidget {
const LogoWidget({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Container(
margin: const EdgeInsets.symmetric(vertical: 10),
child: const FlutterLogo(),
);}}
class GrowTransition extends StatelessWidget {
GrowTransition({required this.child, required this.animation});
final Widget child;
final Animation animation;
@override
Widget build(BuildContext context) {
return AnimatedBuilder(
animation: animation,
builder: (context,child)=>Container(
height: animation.value,
width: animation.value,
child: child,
),
child: child,
);}}
class _LogoAppState extends State with SingleTickerProviderStateMixin {
late Animation animation;
late AnimationController controller;
@override
void initState() {
super.initState();
controller =
AnimationController(vsync: this, duration: const Duration(seconds: 2));
animation = Tween(begin: 0, end: 300).animate(controller);
controller.forward();
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return GrowTransition(child:const LogoWidget(),animation: animation);
}}