get_controller_plus

Extension of GetxController from GetX package with support Widgets.

Features

• Awareness of a running process with duration which requires users to be notified
• Convenient error handler macro functions
• Further encouraging decoupling of Views and View Logics
• Provided with support widgets

Getting started

Prerequisites

• GetX package
• Knowledge of using GetxController class
• Knowledge of connecting Get Observables

Usage

Implementation is the same like GetxController

import 'package:get_controller_plus/get_controller_plus.dart';

class MySmartController extends GetxControllerPlus {

Capabilities

Load Aware

Introducing LoadAware capabilities, the GetxControllerPlus provides extension methods:

• isLoading getter and setter, and with tag variant, isLoadingByTag and setIsLoadingByTag.

// under GetxControllerPlus scope
isLoading = true;
isLoading = false;
setIsLoadingByTag(true, "anotherProcess",);

// within Views
Obx(
  () => {
    final isLoading = controller.isLoading;
    // or
    // final isLoading = controller.isLoadingByTag("anotherProcess",);
    return IgnorePointer(
      ignoring: isLoading,
      child: ElevatedButton(
        onPressed: () {},
        child: isLoading ? CircularProgressIndicator.adaptive() : Text("Go",),
      ),
    );
  },
)

• wait method

// run a Future and resolves it while automatically managing the isLoading state
// usable under GetxControllerPlus scope

final result = await wait(
  download(),
);

• Support Widget LoadAwareGetView and LoadAwareWillPopScope

// examples
import 'package:get_controller_plus/support_widgets.dart';

LoadAwareGetView<MySmartController>(
  builder: (BuildContext context, bool isLoading, Widget? child) {
    if (isLoading) {
      return CircularProgressIndicator.adaptive();
    } else {
      return MySmartView();
    }
  },
)

// this widget will not pop out if isLoading is true
LoadAwareWillPopScope<MySmartController>(
  // you may override the default onWillPop behavior
  // onWillPop: ...
  child: Scaffold(),
)

Error Handling

GetxControllerPlus comes with two additional methods to handle errors.

• setErrorHandler<T>

// public method, can be called from View scope or the controller scope itself
// set this first to make it available within handleError method.

// within View
controller.setErrorHandler<IOException>(
  showAlertDialog(
    context: context,
    builder: (BuildContext context) {
      return AlertDialog(
        title: Text("Error",),
        content: Text("Connection Error!",),
      );
    },
  ),
);

// within controller
// preferrably within onInit state
void _showFormatError() {
  _hasError.value = true;
}

@override
void onInit() {
  super.onInit();
  setErrorHandler<FormatException>(
    _showFormatError,
  );
}

• handleError(Object err)

// protected method, call within controller's scope
Future<void> doSomething() async {
  try {
  // myMagic();
  } catch (err) {
    handleError(err,);
  }
}

Additional information

Additional ideas and concepts are welcome by publishing on Git issues.