AnimatedAlign Widget Examples

AnimatedAlign can automatically transition the child’s position over a given duration whenever the given alignment changes.

import 'package:flutter/material.dart';

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  Alignment _alignment = Alignment.center;

  void _move(Alignment alignment) {
    setState(() {
      _alignment = alignment;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Demo'),
      ),
      body: SafeArea(
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Container(
                padding: EdgeInsets.all(16.0),
                width: 300,
                height: 300,
                color: Colors.blue,
                child: AnimatedAlign(
                    alignment: _alignment,
                    duration: Duration(seconds: 1),
                    child: Container(
                      width: 50.0,
                      height: 50.0,
                      color: Colors.white,
                    )),
              ),
              ElevatedButton(
                  onPressed: () => _move(Alignment.topLeft),
                  child: Container(width: 100, child: Text('Top Left'))),
              ElevatedButton(
                  onPressed: () => _move(Alignment.topCenter),
                  child: Container(width: 100, child: Text('Top Center'))),
              ElevatedButton(
                  onPressed: () => _move(Alignment.topRight),
                  child: Container(width: 100, child: Text('Top Right'))),
              ElevatedButton(
                  onPressed: () => _move(Alignment.bottomRight),
                  child: Container(width: 100, child: Text('Bottom Left'))),
              ElevatedButton(
                  onPressed: () => _move(Alignment.bottomCenter),
                  child: Container(width: 100, child: Text('Bottom Center'))),
              ElevatedButton(
                  onPressed: () => _move(Alignment.bottomLeft),
                  child: Container(width: 100, child: Text('Bottom Right'))),
            ],
          ),
        ),
      ),
    );
  }
}

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