Masterarbeit/lib/widgets.dart

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

/// scan Results
class ScanResultTile extends StatelessWidget {
  final ScanResult result;
  final VoidCallback onTap;
  final String onlyDeviceToShow;

  const ScanResultTile(
      {Key key, this.result, this.onlyDeviceToShow, this.onTap})
      : super(key: key);

  Widget _buildTitle(BuildContext context) {
    if (result.device.name.length > 0) {
      return Column(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Text(result.device.name),
          Text(
            result.device.id.toString(),
            style: Theme.of(context).textTheme.caption,
          )
        ],
      );
    } else {
      return Text(result.device.id.toString());
    }
  }

  String getNiceHexArray(List<int> bytes) {
    return '[${bytes.map((i) => i.toRadixString(16).padLeft(2, '0')).join(', ')}]'
        .toUpperCase();
  }

  String getNiceManufacturerData(Map<int, List<int>> data) {
    if (data.isEmpty) {
      return null;
    }
    List<String> res = [];
    data.forEach((id, bytes) {
      res.add(
          '${id.toRadixString(16).toUpperCase()}: ${getNiceHexArray(bytes)}');
    });
    return res.join(', ');
  }

  String getNiceServiceData(Map<String, List<int>> data) {
    if (data.isEmpty) {
      return null;
    }
    List<String> res = [];
    data.forEach((id, bytes) {
      res.add('${id.toUpperCase()}: ${getNiceHexArray(bytes)}');
    });
    return res.join(', ');
  }

  @override
  Widget build(BuildContext context) {
    // Test if device = TouchDemonstrator
    if (result.advertisementData.localName == onlyDeviceToShow) {
      return Container(
//        decoration: FlutterLogoDecoration(),
        child: Padding(
          padding: const EdgeInsets.all(8.0),
          child: new Column(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              _buildTitle(context), // Name of devices
              RaisedButton(
                child: Text('CONNECT'),
                color: Colors.black,
                textColor: Colors.white,
                onPressed:
                    (result.advertisementData.connectable) ? onTap : null,
              ),
            ],
          ),
        ),
      );
    } else {
      return Container();
    }
  }
}

/// Service tiles
class ServiceTile extends StatelessWidget {
  final BluetoothService service;
  final List<CharacteristicTile> characteristicTiles;
  final String onlyServiceToShow;

  const ServiceTile(
      {Key key, this.service, this.characteristicTiles, this.onlyServiceToShow})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    if (characteristicTiles.length > 0) {
      if (service.uuid.toString().toUpperCase().substring(4, 8) ==
          onlyServiceToShow) {
        return new ExpansionTile(
          initiallyExpanded: true,
          title: new Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              const Text('Service (BLEUart)'),
              new Text(
                  'UUID: 0x${service.uuid.toString().toUpperCase().substring(4, 8)}',
                  style: Theme.of(context).textTheme.body1.copyWith(
                      color: Theme.of(context).textTheme.caption.color))
            ],
          ),

          /// characteristic tiles
          children: characteristicTiles,
        );
      } else {
        return Container(); //Text("Service not BLEUart");
      }
    } else {
      return new ListTile(
        title: const Text('Service'),
        subtitle: new Text(
            '0x${service.uuid.toString().toUpperCase().substring(4, 8)}'),
      );
    }
  }
}

/// characteristic tile
class CharacteristicTile extends StatelessWidget {
  final BluetoothCharacteristic characteristic;
  final List<DescriptorTile> descriptorTiles;

  //final VoidCallback onReadPressed;
//  final VoidCallback onWritePressed;
  final VoidCallback onNotificationPressed;
  final String onlyCharacteristicToListen;

  const CharacteristicTile(
      {Key key,
      this.characteristic,
      this.descriptorTiles,
      //this.onReadPressed,
//        this.onWritePressed,
      this.onNotificationPressed,
      @required this.onlyCharacteristicToListen})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    if(onlyCharacteristicToListen == characteristic.uuid.toString().toUpperCase().substring(4,8)){
      print("found ${characteristic.uuid.toString().toUpperCase().substring(4,8)} /// $onlyCharacteristicToListen");
    }

    /// title
    var title = new Column(
      mainAxisAlignment: MainAxisAlignment.center,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        const Text('CharacteristicTile title'),
        new Text(
            '0x${characteristic.uuid.toString().toUpperCase().substring(4, 8)}',
            style: Theme.of(context)
                .textTheme
                .body1
                .copyWith(color: Theme.of(context).textTheme.caption.color))
      ],
    );

    /// subscribe
    var actions = new Row(
      mainAxisSize: MainAxisSize.min,
      children: <Widget>[
        new IconButton(
          icon: new Icon(
              characteristic.isNotifying ? Icons.sync_disabled : Icons.sync,
              color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
          onPressed: onNotificationPressed,
        )
      ],
    );

    return new ListTile(
      title: title,
      subtitle: new Text(characteristic.value.toString()),
      trailing: actions,
    );

    //onNotificationPressed();
    /*if (descriptorTiles.length > 0) {
      return new ExpansionTile(
        title: new ListTile(
          title: title,
          subtitle: new Text(characteristic.value.toString()),
          contentPadding: EdgeInsets.all(0.0),
        ),
        trailing: actions,
        children: descriptorTiles,
      );
    } else {*/
  }
}

class DescriptorTile extends StatelessWidget {
  final BluetoothDescriptor descriptor;

  /* final VoidCallback onReadPressed;
  final VoidCallback onWritePressed;*/

  const DescriptorTile(
      {Key key, this.descriptor}) //, this.onReadPressed, this.onWritePressed})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    var title = new Column(
      mainAxisAlignment: MainAxisAlignment.center,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        const Text('Descriptor'),
        new Text(
            '0x${descriptor.uuid.toString().toUpperCase().substring(4, 8)}',
            style: Theme.of(context)
                .textTheme
                .body1
                .copyWith(color: Theme.of(context).textTheme.caption.color))
      ],
    );

    return new ListTile(
      title: title,
      subtitle: new Text(descriptor.value.toString()),
/*      trailing: new Row(
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          new IconButton(
            icon: new Icon(
              Icons.file_download,
              color: Theme.of(context).iconTheme.color.withOpacity(0.5),
            ),
            onPressed: null,//onReadPressed,
          ),
          new IconButton(
            icon: new Icon(
              Icons.file_upload,
              color: Theme.of(context).iconTheme.color.withOpacity(0.5),
            ),
            onPressed: null,//onWritePressed,
          )
        ],
      ),*/
    );
  }
}