Flutter TweenAnimationBuilder

main.dart

import 'package:flutter/material.dart';
import 'dart:math';

void main() {
  runApp(new Application());
}

class TweenAnimation extends StatefulWidget {
  final String message;

  TweenAnimation({this.message});

  _TweenAnimationState createState() => _TweenAnimationState();
}

class _TweenAnimationState extends State<TweenAnimation> {

  double _rotationValue = 0;
  @override
  Widget build(BuildContext context) {
    return(
      Column(children: [
        Center(child: TweenAnimationBuilder(
        duration: Duration(milliseconds: 200),
        tween: Tween<double>(begin: 0, end: _rotationValue),
        builder: (_, double angle, __) {
          return Transform.rotate(angle: angle,
          child: Text("Hello I'm a ${widget.message} !", style: TextStyle(fontSize: 16))
          );
        },
        ),),
        Slider(min: 0, max: 2*pi, onChanged: (value) => setState(() {_rotationValue = value;}), value: _rotationValue)
        ])
    );
  }
}

/*class Counter extends StatefulWidget {
  final String name;

  Counter(this.name);

  _CounterState createState() => _CounterState();
}

class _CounterState extends State<Counter> {

  int _counterValue = 0;
  bool _scaleValue = false;

  void incrementCounter() {
    setState(() {_counterValue++; this._scaleValue =! this._scaleValue;});
    //print('(' + MediaQuery.of(context).size.width.toString() + ', ' + MediaQuery.of(context).size.height.toString() + ')');
  }

  @override
  Widget build(BuildContext context) {
    return(
      AnimatedContainer(
        height: this._scaleValue ? 200 : 100,
        padding: EdgeInsets.all(10),
        margin: EdgeInsets.all(10),
        curve: Curves.easeOutCubic,
        duration: Duration(milliseconds: 200),
        alignment: Alignment.center,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.center,
          mainAxisSize: MainAxisSize.max,
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: <Widget>[
            Text('${widget.name} : $_counterValue', style: TextStyle(fontSize: 16)),
            RaisedButton(child: Text("ADD", style: TextStyle(color: Colors.white)), onPressed: incrementCounter, color: Colors.blue)
          ],
        ),
      )
    );
  }
}*/

class Application extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: "Hello World!",
      theme: ThemeData(primarySwatch: Colors.blue),
      home: Scaffold(
        appBar: AppBar(title: Text("Hello World!")),
        body: Column(children: [
          //Counter("The current counter value"),
          TweenAnimation(message: "Rotating Text",)
        ],)
      ),
    );
  }
}