cuong_focus_detector_package 0.0.11

Cuong's new Flutter package project.

example/lib/main.dart

import 'package:cuong_focus_detector_package/cuong_focus_detector_package.dart';
import 'package:flutter/material.dart';
import 'package:logger/logger.dart';

final logger = Logger(
  printer: PrettyPrinter(
    methodCount: 0,
    printTime: false,
  ),
);

void main() {
  runApp(
    MaterialApp(
      home: const FocusDetectorExample(),
      theme: ThemeData(),
    ),
  );
}

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

  @override
  Widget build(BuildContext context) {
    return FocusDetector(
      onFocusLost: () {
        logger.i(
          'Focus Lost.'
          '\nTriggered when either [onVisibilityLost] or [onForegroundLost] '
          'is called.'
          '\nEquivalent to onPause() on Android or viewDidDisappear() on '
          'iOS.',
        );
      },
      onFocusGained: () {
        logger.i(
          'Focus Gained.'
          '\nTriggered when either [onVisibilityGained] or '
          '[onForegroundGained] '
          'is called.'
          '\nEquivalent to onResume() on Android or viewDidAppear() on iOS.',
        );
      },
      onVisibilityLost: () {
        logger.i(
          'Visibility Lost.'
          '\nIt means the widget is no longer visible within your app.',
        );
      },
      onVisibilityGained: () {
        logger.i(
          'Visibility Gained.'
          '\nIt means the widget is now visible within your app.',
        );
      },
      onForegroundLost: () {
        logger.i(
          'Foreground Lost.'
          '\nIt means, for example, that the user sent your app to the '
          'background by opening another app or turned off the device\'s '
          'screen while your widget was visible.',
        );
      },
      onForegroundGained: () {
        logger.i(
          'Foreground Gained.'
          '\nIt means, for example, that the user switched back to your app '
          'or turned the device\'s screen back on while your widget was '
          'visible.',
        );
      },
      child: Material(
        child: Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              const Text(
                'Send the app to the background or push another page and '
                'watch the console.',
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: 20,
                ),
              ),
              const SizedBox(
                height: 20,
              ),
              ElevatedButton(
                onPressed: () {
                  final route = MaterialPageRoute(
                    builder: (_) => const OtherPage(),
                  );
                  Navigator.of(context).push(route);
                },
                child: const Text(
                  'PUSH ANOTHER PAGE',
                ),
              )
            ],
          ),
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(),
      body: const Padding(
        padding: EdgeInsets.all(16),
        child: Center(
          child: Text(
            'Look at the console and return to the first screen.',
            textAlign: TextAlign.center,
            style: TextStyle(
              fontSize: 20,
            ),
          ),
        ),
      ),
    );
  }
}