extensions_method_part_3.dart

/*
 * Dart & Flutter - Training
 * 
 * Copyright (c) Boris-Wilfried Nyasse
 * All rights reserved
 * 
*/
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  final String title;
  const MyHomePage({required this.title});

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          children: <Widget>[
            const Text(
              'I am aligned at start',
            ).alignAtStart(),
            Container(
              height: 50,
              width: 200,
              color: Colors.red,
            ).alignAtEnd()
          ],
        ),
      ),
    );
  }
}

extension ExtendedText on Widget {
  Widget alignAtStart() {
    return Align(
      alignment: AlignmentDirectional.centerStart,
      child: this,
    );
  }

  Widget alignAtEnd() {
    return Align(
      alignment: AlignmentDirectional.centerEnd,
      child: this,
    );
  }
}