ImplicitAnimations

sample.packages.flutter.lib.src.widgets.implicit_animations.879.

The following code implements the [AnimatedAlign] widget, using a [curve] of [Curves.fastOutSlowIn].

  
import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State {
  bool selected = false;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        setState(() {
          selected = !selected;
        });
      },
      child: Center(
        child: Container(
          width: 250.0,
          height: 250.0,
          color: Colors.red,
          child: AnimatedAlign(
            alignment: selected ? Alignment.topRight : Alignment.bottomLeft,
            duration: const Duration(seconds: 1),
            curve: Curves.fastOutSlowIn,
            child: const FlutterLogo(size: 50.0),
          ),
        ),
      ),
    );
  }
}