devicehandler.h Example File | Qt Bluetooth 5.9

Qt 5.9 | Qt Bluetooth | Bluetooth Low Energy Heart Rate Game | devicehandler.h Example File

Qt 5.9.9 Reference Documentation

# devicehandler.h Example File

heartrate-game/devicehandler.h

      /***************************************************************************
      **
      ** Copyright (C) 2017 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #ifndef DEVICEHANDLER_H
      #define DEVICEHANDLER_H

      #include "bluetoothbaseclass.h"

      #include <QDateTime>
      #include <QVector>
      #include <QTimer>
      #include <QLowEnergyController>
      #include <QLowEnergyService>

      class DeviceInfo;

      class DeviceHandler : public BluetoothBaseClass
      {
          Q_OBJECT

          Q_PROPERTY(bool measuring READ measuring NOTIFY measuringChanged)
          Q_PROPERTY(bool alive READ alive NOTIFY aliveChanged)
          Q_PROPERTY(int hr READ hr NOTIFY statsChanged)
          Q_PROPERTY(int maxHR READ maxHR NOTIFY statsChanged)
          Q_PROPERTY(int minHR READ minHR NOTIFY statsChanged)
          Q_PROPERTY(float average READ average NOTIFY statsChanged)
          Q_PROPERTY(int time READ time NOTIFY statsChanged)
          Q_PROPERTY(float calories READ calories NOTIFY statsChanged)
          Q_PROPERTY(AddressType addressType READ addressType WRITE setAddressType)

      public:
          enum class AddressType {
              PublicAddress,
              RandomAddress
          };
          Q_ENUM(AddressType)

          DeviceHandler(QObject *parent = 0);

          void setDevice(DeviceInfo *device);
          void setAddressType(AddressType type);
          AddressType addressType() const;

          bool measuring() const;
          bool alive() const;

          // Statistics
          int hr() const;
          int time() const;
          float average() const;
          int maxHR() const;
          int minHR() const;
          float calories() const;

      signals:
          void measuringChanged();
          void aliveChanged();
          void statsChanged();

      public slots:
          void startMeasurement();
          void stopMeasurement();
          void disconnectService();

      private:
          //QLowEnergyController
          void serviceDiscovered(const QBluetoothUuid &);
          void serviceScanDone();

          //QLowEnergyService
          void serviceStateChanged(QLowEnergyService::ServiceState s);
          void updateHeartRateValue(const QLowEnergyCharacteristic &c,
                                    const QByteArray &value);
          void confirmedDescriptorWrite(const QLowEnergyDescriptor &d,
                                    const QByteArray &value);

      #ifdef SIMULATOR
          void updateDemoHR();
      #endif
      private:
          void addMeasurement(int value);

          QLowEnergyController *m_control;
          QLowEnergyService *m_service;
          QLowEnergyDescriptor m_notificationDesc;
          DeviceInfo *m_currentDevice;

          bool m_foundHeartRateService;
          bool m_measuring;
          int m_currentValue, m_min, m_max, m_sum;
          float m_avg, m_calories;

          // Statistics
          QDateTime m_start;
          QDateTime m_stop;

          QVector<int> m_measurements;
          QLowEnergyController::RemoteAddressType m_addressType = QLowEnergyController::PublicAddress;

      #ifdef SIMULATOR
          QTimer m_demoTimer;
      #endif
      };

      #endif // DEVICEHANDLER_H