Add DI (dependency injection) as well as QController for handling business logic of a page

Without changing the complexities of the packages, here by I propose some enhancements to the package which will helps the developers in their development process with minimal efforts & not depending on other packages for simple things

Below is an example code which shows how to use DI & QController in generic way

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:qlevar_router/qlevar_router.dart';

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

class MyApp extends StatelessWidget {
  final routes = [
    QRoute(
      name: 'sign-in',
      path: '/sign-in',
      middleware: [
        QDependencyBuilder(SignInDependencies()),
      ],
      builder: () => const SignInPage(),
    ),
    QRoute(
      name: 'sign-up',
      path: '/sign-up',
      middleware: [
        QDependencyBuilder(SignUpDependencies()),
      ],
      builder: () => const SignUpPage(),
    ),
  ];

  MyApp({super.key});

  @override
  Widget build(BuildContext context) => MaterialApp.router(
        routeInformationParser: const QRouteInformationParser(),
        routerDelegate: QRouterDelegate(routes, initPath: '/sign-in'),
        theme: ThemeData.dark(),
      );
}

class SignInDependencies extends QDependencyBinder {
  @override
  FutureOr<void> onInit() {
    super.onInit();
    QR.dependencies.inject(SignInController());
  }
}

class SignInPage extends StatelessWidget {
  const SignInPage({Key? key}) : super(key: key);

  SignInController get controller => QR.dependencies.get();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Sign In'),
        centerTitle: true,
      ),
      body: Column(
        children: [
          TextField(
            controller: controller.textEditingController,
          ),
          ElevatedButton(
            onPressed: () => QR.navigator.replaceLastName('sign-up'),
            child: const Text('Sign-Up'),
          ),
        ],
      ),
    );
  }
}

class SignInController extends QController {
  final TextEditingController textEditingController = TextEditingController();

  @override
  void onDispose() {
    textEditingController.dispose();
    super.onDispose();
  }
}

class SignUpDependencies extends QDependencyBinder {
  @override
  FutureOr<void> onInit() {
    super.onInit();
    QR.dependencies.inject(SignUpController());
  }
}

class SignUpPage extends StatelessWidget {
  const SignUpPage({Key? key}) : super(key: key);

  SignUpController get controller => QR.dependencies.get<SignUpController>();

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: Text('Sign Up'),
          centerTitle: true,
        ),
        body: Column(
          children: [
            TextField(
              controller: controller.textEditingController,
            ),
            ElevatedButton(
              onPressed: () => QR.navigator.replaceAllWithName('sign-in'),
              child: const Text('Sign-In'),
            ),
          ],
        ),
      );
}

class SignUpController extends QController {
  final TextEditingController textEditingController = TextEditingController();

  @override
  void onDispose() {
    textEditingController.dispose();
    super.onDispose();
  }
}

SchabanBo / qlevar_router

Add DI (dependency injection) as well as QController for handling business logic of a page #91

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