当按下一个按钮时，是否可以更改网格视图中所有按钮的颜色？

Question

我正在编写一个由gridview中的100个按钮组成的迷宫应用程序。我想在按下任何按钮时将所有按钮的颜色更改为绿色。另外，是否可以在按下一个按钮时更改其他按钮的颜色（即，对其进行编码，以便在按下左上方的按钮时右下方的按钮可以更改颜色）？与我的问题相关的演示代码如下。

import 'dart:async';

import 'package:flutter/material.dart';
Color color=Colors.grey;

void main() {
  maze maze1=new maze();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class gameButton extends StatefulWidget {
  @override
  gameButtonState createState() => gameButtonState();
}

class gameButtonState extends State<gameButton> {
@override
  Widget build(BuildContext context) {
  return Container(
    decoration: BoxDecoration(border: Border.all(color: Colors.black)),
    child: FlatButton(
      color: color,
      materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
      onPressed: () {
        setState(() {
          color=Colors.green;
        });
      },
    ),
  );
  }
}

class maze extends StatefulWidget {
  List<gameButton> empty_grid = [
    for (var i = 0; i < 100; i++) new gameButton()
  ];
  @override
  mazeState createState() => mazeState();
}

class mazeState extends State<maze> {
  @override
  Widget build(BuildContext context) {
  }
}



class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  maze maze1=new maze();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Demo Code"),
      ),
      body: Center(
        child:Column(
          children: <Widget>[
            GridView.builder(
              itemCount: 100,
              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                  crossAxisCount: 10,
                  crossAxisSpacing: 0,
                  mainAxisSpacing: 0),
              shrinkWrap: true,
              itemBuilder: (BuildContext context, int index) {
                return maze1.empty_grid[index];
              },
            ),
          ],
        )
      ),
    );
  }
}