问提供程序还是有状态窗口小部件？

EN

class DiceWidget extends StatefulWidget {
  final Function onRolled;

  DiceWidget(this.onRolled);

  @override
  _DiceWidgetState createState() => _DiceWidgetState();
}

class _DiceWidgetState extends State<DiceWidget> {
  static Dice dice = Dice();
  MaterialColor diceColor = dice.getColor;
  @override
  Widget build(BuildContext context) {
    return SizedBox(
      height: 150,
      width: 150,
      child: RaisedButton(
        onPressed: () {
          for (int i = 0; i < 10; i++) {
            dice.rollDice();
            setState(() {
              diceColor = dice.getColor;
            });
            sleep(Duration(milliseconds: i * 100));
          }
          widget.onRolled(diceColor);
        },
        color: diceColor,
      ),
    );
  }
}