Workers GetX State Management

 import "package:flutter/material.dart";

import "package:get/get.dart";
import "package:getx_state_management/GetX_Workers/myController.dart";

/// Workers :
/// Workers generates specific callbacks whenever an event occurs. Different type of workers are there like
/// ever, everAll, once, debounce, interval
/// Best place to use workers is inside the onInit method (In Controller Class).

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      title: "Getx Workers",
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.grey,
      ),
      home: WorkersPractice(),
    );
  }
}

class WorkersPractice extends StatelessWidget {
  WorkersPractice({super.key});

  MyController myController = Get.put(MyController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text(
          "GetX Workers",
          style: TextStyle(fontWeight: FontWeight.bold),
        ),
        centerTitle: true,
        backgroundColor: Colors.grey,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ElevatedButton(
              onPressed: () {
                myController.incrementCounter();
              },
              style: ElevatedButton.styleFrom(
                backgroundColor: Colors.blue,
                fixedSize: const Size(200.0, 50.0),
              ),
              child: const Text(
                "Increment",
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20.0, color: Colors.white),
              ),
            ),
            const SizedBox(height: 40.0),
            SizedBox(
              width: 300.0,
              child: TextFormField(
                decoration: InputDecoration(
                  hintText: "Enter",
                  border: OutlineInputBorder(
                    borderRadius: BorderRadius.circular(11.0),
                  ),
                ),
                onChanged: (value) {
                  myController.incrementCounter();
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}

import "package:get/get.dart";

class MyController extends GetxController
{
  var count = 0.obs;

  void incrementCounter()
  {
    count++;
  }

  @override
  void onInit()
  {
    /// called every time when the value of count variable changes
    // ever(count, (_) { return print(count); },);

    /// called every time when the value of any variable from the list changes
    // everAll([count], (_) { return print(count); },);

    /// called only once when the variable value changes
    // once(count, (_) { return print(count); },);

    /// called every time the user stops typing for 1 second
    /// debounce() is generally used for searching purpose
    // debounce(count,
    //       (_) { return print("When the user stop typing for 1 second the value of count will be printed");
    //   },
    //   time: const Duration(seconds: 1),
    // );

    /// Ignore all changes within 3 second.
    /// Imagine that the user can earn coins by clicking on something,
    /// if he clicked 300 times in the same minute,
    /// he would have 300 coins, using interval,
    /// you can set a time frame for 3 seconds,
    /// and even then clicking 300 or a thousand times,
    /// the maximum he would get in 1 minute would be 20 coins,
    /// clicking 300 or 1 million times
    interval(count, (_) { return print("Ignore all changes"); }, time: const Duration(seconds: 3),);

    super.onInit();
  }
}