readme.md

Flutter Conf In 2023 - Lat Long

flutter conf In 2023 city reveal

main.dart

import 'package:flutter/widget.dart';
import 'package:flutter/materail.dart';
import 'package:flutter/cupertnio.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Material App',
      theme: ThemeData.dark(),
      home: const HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({super.key});
  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final _inputController = TextEditingController();
  String latitude = "";
  String longitude = "";
  String _getResult(String value) {
    StringBuffer result = StringBuffer();
    int i = 0;
    if (value.length % 2 != 0) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text(
            'Invalid input key!',
          ),
        ),
      );
    }
    while (i < value.length) {
      String hb = value.substring(i, i + 2);
      int dv = 0;
      for (int j = 0; j < hb.length; j++) {
        int hd = hb.codeUnitAt(j);
        if (hd >= 48 && hd <= 57) {
          dv += (hd - 48) * (j == 0 ? 16 : 1);
        } else if (hd >= 65 && hd <= 70) {
          dv += (hd - 65 + 10) * (j == 0 ? 16 : 1);
        } else if (hd >= 97 && hd <= 102) {
          dv += (hd - 97 + 10) * (j == 0 ? 16 : 1);
        } else {
          ScaffoldMessenger.of(context).showSnackBar(
            const SnackBar(
              content: Text(
                'Invalid input key!',
              ),
            ),
          );
        }
      }
      result.write(String.fromCharCode(dv));
      i += 2;
    }
    return result.toString();
  }
  
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Padding(
        padding: const EdgeInsets.all(30.0),
        child: Center(
          child: SingleChildScrollView(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                const Spacer(),
                Image.network(
                  'https://raw.githubusercontent.com/flutterconfin/flutter-conf-data/main/fci_logo.png',
                ),
                const SizedBox(height: 40),
                const FittedBox(child: SizedBox(height: 0, width: 0)),
                TextField(
                  controller: _inputController,
                  style: const TextStyle(
                    fontSize: 18.0,
                    color: Colors.black,
                  ),
                  decoration: InputDecoration(
                    hintText: 'Enter your key',
                    hintStyle: const TextStyle(
                      color: Colors.grey,
                    ),
                    filled: true,
                    fillColor: Colors.white,
                    contentPadding: const EdgeInsets.all(16.0),
                    enabledBorder: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(10.0),
                      borderSide: BorderSide(
                        color: Colors.grey.shade400,
                      ),
                    ),
                    focusedBorder: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(10.0),
                      borderSide: const BorderSide(
                        color: Colors.blue,
                        width: 2.0,
                      ),
                    ),
                    suffixIcon: IconButton(
                      onPressed: () {
                        if (_inputController.text.contains(',')) {
                          final input1 = _inputController.text.split(',')[0];
                          final input2 = _inputController.text.split(',')[1];
                          setState(() {
                            latitude = _getResult(input1);
                            longitude = _getResult(input2);
                          });
                          ScaffoldMessenger.of(context).showSnackBar(
                            const SnackBar(
                              content: Text(
                                'Note this coordinates and now search the location for this coordinates 🎉',
                              ),
                            ),
                          );
                        } else {
                          setState(() {
                            latitude = '';
                            longitude = '';
                          });
                          ScaffoldMessenger.of(context).showSnackBar(
                            const SnackBar(
                              content: Text(
                                'Invalid input key!',
                              ),
                            ),
                          );
                        }
                      },
                      icon: const Icon(
                        Icons.arrow_forward_ios,
                        color: Colors.blue,
                      ),
                    ),
                  ),
                ),
                const SizedBox(height: 40),
                if (latitude.isNotEmpty && longitude.isNotEmpty)
                  SizedBox(
                    width: MediaQuery.sizeOf(context).width,
                    child: Center(
                      child: SelectableText(
                        'Coordinates: $latitude,$longitude',
                        style: const TextStyle(fontSize: 20),
                      ),
                    ),
                  ),
                const Spacer(),
              ],
            );
          ];
        );
      ];
  },
  ),
};