Mixins - 1

readme.md

Mixins - 1

Created with <3 with dartpad.dev.

mixins1.dart

import 'package:flutter/material.dart';
import 'dart:developer' as devtools show log;

extension Log on Object {
  void log() => devtools.log(toString());
}

abstract class Animal{
  const Animal();
}

mixin CanRun on Animal {
  int get speed;
  void run() {
    "Running at a speed of: $speed".log();
  }
}

class Cat extends Animal with CanRun {
   int speed = 10;
  
  @override
  run() {
    super.run();
    "Cat func is called".log();
  }
}

// By default it extends Type "Object", that why the error
class Dog with CanRun {
  @override
  int get speed => throw UnimplementedError();
}

void testIt() {
  final cat = Cat();
  cat.run();
  cat.speed = 20;
  cat.run();
}

void main() {
  'Hello'.log();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    testIt();
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: Colors.amberAccent,
      ),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Text(
      'Hello, World!',
      style:
          Theme.of(context).textTheme.headline5!.copyWith(color: Colors.black),
    );
  }
}