用新状态重建导航页面

Question

我有一个名为Classroom的小部件，该小部件中有一个按钮，可将您导航到另一个名为ButtonPage的页面。它只有一个按钮可以触发影响Classroom状态的功能。完美运作。但是问题是我也想通过LightButton小部件中的更新状态来更改Classroom的颜色。这是代码。

教室

class Classroom extends StatefulWidget {
  @override
  _ClassroomState createState() => _ClassroomState();
}

class _ClassroomState extends State<Classroom> {
  bool isLightOn = false;
  final List<String> lightColor = ["red", "green", "blue"];
  String currentItem = "red";

  void onButtonPress() {
    setState(() {
      isLightOn = isLightOn;
    });
  }

  void selectItem(String selectedItem) {
    setState(() {
      currentItem = selectedItem;
    });
  }

  Widget build(BuildContext context) {
    return Container(
      color: Colors.blue,
      padding: EdgeInsets.all(5.0),
      child: Column(
        children: <Widget>[
          LightBulb(
            isLightOn: isLightOn,
            currentItem: currentItem,
          ),
          Container(
            child: MaterialButton(
              textColor: Colors.white,
              color: Colors.blue,
              child: Text("Go to button's page"),
              onPressed: () {
                Navigator.push(context,
                    MaterialPageRoute<void>(builder: (BuildContext context) {
                  return ButtonPage(
                    isLightOn: isLightOn,
                    onButtonPress: onButtonPress,
                  );
                }));
              },
            ),
          ),
          LightColorSelector(
            selectItem: selectItem,
            currentItem: currentItem,
            lightColor: lightColor,
          ),
        ],
      ),
    );
  }
}

---

ButtonPage

class ButtonPage extends StatelessWidget {
  final bool isLightOn;
  final VoidCallback onButtonPress;

  const ButtonPage({this.isLightOn, this.onButtonPress});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Button Page"),
      ),
      body: Center(
          child: Container(
        child: LightButton(
          isLightOn: isLightOn,
          onButtonPress: onButtonPress,
        ),
      )),
    );
  }
}

---

LightButton

class LightButton extends StatelessWidget {
  final bool isLightOn;
  final VoidCallback onButtonPress;

  const LightButton({this.isLightOn, this.onButtonPress});

  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.red,
      padding: EdgeInsets.all(5.0),
      child: MaterialButton(
        materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
        color: Colors.blue,
        textColor: Colors.white,
        child:
            isLightOn ?? false ? Text("Turn light off") : Text("Turn light on"),
        onPressed: () {
          onButtonPress();
        },
      ),
    );
  }
}

当我单击标记为MaterialButton的{​​{1}}时，它将使用Go to button's page和ButtonPage变量将我导航到isLightOn。在onButtonPress中，当触发LightButton时，它将仅重建上一页。这就是onButtonPress的标签未更改的原因。如何使其受到影响？