main.dart

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

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  SystemChrome.setPreferredOrientations(
          [DeviceOrientation.landscapeLeft, DeviceOrientation.landscapeRight])
      .then((_) {
    runApp(MyApp());
  });
}

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

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Expanded(
            flex: 1,
            child: SingleChildScrollView(
              scrollDirection: Axis.vertical,
              padding: EdgeInsets.all(5),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children:
                    ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10']
                        .map(
                          (e) => Container(
                            height: 30,
                            child: Text(e),
                          ),
                        )
                        .toList(),
              ),
            ),
          ),
          Expanded(
            flex: 15,
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Expanded(
                  flex: 0,
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children:
                        ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10']
                            .map(
                              (e) => Container(
                                height: 30,
                                child: Text(e),
                              ),
                            )
                            .toList(),
                  ),
                ),
                Expanded(
                  flex: 25,
                  child: Container(
                    child: Text('Your widget goes here'),
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

Widget printGrid(BuildContext context) {
  return GridView.count(
    scrollDirection: Axis.horizontal,
    crossAxisCount: 5,
    children: List.generate(100, (index) {
      return Center(
        child: Text(
          "$index",
          style: Theme.of(context).textTheme.headline5,
        ),
      );
    }),
  );
}

Widget printHeader(BuildContext context) {
  return ListView(
    scrollDirection: Axis.horizontal,
    children: List.generate(100, (index) {
      return Text(
        index.toString(),
        style: Theme.of(context).textTheme.headline5,
      );
    }),
  );
}

/* 
body: GridView.count(
          
          scrollDirection: Axis.horizontal,
          
          crossAxisCount: 1,
          children: List.generate(10, (index) {
            return Wrap(children: [
              Container(
                  color: Colors.blue,
                  child: Center(
                    child: Text(
                      "$index",
                      style: Theme.of(context).textTheme.bodyText1,
                    ),
                  ))
            ]);
          }),
        ));
*/