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main17.dart
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main17.dart
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//columns and rows
// one of the most common layout patterns is to arrange widget vertically or horizontally
//you can use a row widget to arrange widget horizontally and a column widget to arrange widget vertically
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
// This is the theme of your application.
//
// TRY THIS: Try running your application with "flutter run". You'll see
// the application has a blue toolbar. Then, without quitting the app,
// try changing the seedColor in the colorScheme below to Colors.green
// and then invoke "hot reload" (save your changes or press the "hot
// reload" button in a Flutter-supported IDE, or press "r" if you used
// the command line to start the app).
//
// Notice that the counter didn't reset back to zero; the application
// state is not lost during the reload. To reset the state, use hot
// restart instead.
//
// This works for code too, not just values: Most code changes can be
// tested with just a hot reload.
colorScheme: ColorScheme.fromSeed(seedColor: Colors.yellow),
useMaterial3: true,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// TRY THIS: Try changing the color here to a specific color (to
// Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
// change color while the other colors stay the same.
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: Container(
height: 700,
width: 500,
child: Column(
// mainAxisAlignment: MainAxisAlignment.spaceAround,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Column(
children: [
OutlinedButton(onPressed: (){
}, child: Text('OUTLINE BUTTON')),
OutlinedButton(onPressed: (){
}, child: Text('OUTLINE BUTTON')),
],
),
Text(
'r1',
style: TextStyle(
fontSize: 22,
color: Colors.blue,
backgroundColor: Colors.pink),
),
Text(
'r2',
style: TextStyle(fontSize: 22),
),
Text(
'r3',
style: TextStyle(fontSize: 22),
),
Text(
'r4',
style: TextStyle(fontSize: 22),
),
Text(
'r5',
style: TextStyle(fontSize: 22),
),
],
),
Text(
'a',
style: TextStyle(
fontSize: 22,
color: Colors.blue,
backgroundColor: Colors.pink),
),
Text(
'b',
style: TextStyle(fontSize: 22),
),
Text(
'c',
style: TextStyle(fontSize: 22),
),
Text(
'd',
style: TextStyle(fontSize: 22),
),
Text(
'e',
style: TextStyle(fontSize: 22),
),
ElevatedButton(onPressed: () {}, child: Text('CLECK')),
],
),
)
// This trailing comma makes auto-formatting nicer for build methods.
);
}
}