swiftcontrol/lib/widgets/scan.dart

import 'dart:io';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:swift_control/main.dart';
import 'package:swift_control/pages/markdown.dart';

class ScanWidget extends StatefulWidget {
  const ScanWidget({super.key});

  @override
  State<ScanWidget> createState() => _ScanWidgetState();
}

class _ScanWidgetState extends State<ScanWidget> {
  @override
  void initState() {
    super.initState();

    connection.initialize();

    /*_isScanningSubscription = FlutterBluePlus.isScanning.listen((state) {
      _isScanning = state;
      if (mounted) {
        setState(() {});
      }
    });*/

    // after the first frame
    WidgetsBinding.instance.addPostFrameCallback((_) {
      // must be called from a button
      if (!kIsWeb) {
        Future.delayed(Duration(seconds: 1))
            .then((_) {
              return connection.performScanning();
            })
            .catchError((e) {
              print(e);
            });
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.start,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        ValueListenableBuilder(
          valueListenable: connection.isScanning,
          builder: (context, isScanning, widget) {
            if (isScanning) {
              return Column(
                spacing: 12,
                mainAxisAlignment: MainAxisAlignment.start,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    'Scanning for devices... Make sure they are powered on and in range and not connected to another device.',
                  ),
                  if (!kIsWeb && (Platform.isMacOS || Platform.isIOS || Platform.isWindows))
                    ValueListenableBuilder(
                      valueListenable: connection.isMediaKeyDetectionEnabled,
                      builder: (context, value, child) {
                        return SwitchListTile.adaptive(
                          value: value,
                          contentPadding: EdgeInsets.zero,
                          dense: true,
                          subtitle: Text(
                            'Enable this option to allow BikeControl to detect bluetooth remotes. In order to do so BikeControl needs to act as a media player.',
                          ),
                          title: Row(
                            children: [
                              const Text("Enable Media Key Detection"),
                            ],
                          ),
                          onChanged: (change) {
                            connection.isMediaKeyDetectionEnabled.value = change;
                          },
                        );
                      },
                    ),
                  TextButton(
                    onPressed: () {
                      Navigator.push(
                        context,
                        MaterialPageRoute(builder: (c) => MarkdownPage(assetPath: 'TROUBLESHOOTING.md')),
                      );
                    },
                    child: const Text("Show Troubleshooting Guide"),
                  ),
                  SizedBox(),
                ],
              );
            } else {
              return Row(
                children: [
                  ElevatedButton(
                    onPressed: () {
                      connection.performScanning();
                    },
                    child: const Text("SCAN"),
                  ),
                ],
              );
            }
          },
        ),
      ],
    );
  }
}