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| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtSensors module of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #ifndef QSENSORBACKEND_H |
| #define QSENSORBACKEND_H |
| |
| #include <QtSensors/qsensor.h> |
| #include <QtSensors/qsensormanager.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QSensorBackendPrivate; |
| |
| class Q_SENSORS_EXPORT QSensorBackend : public QObject |
| { |
| Q_OBJECT |
| public: |
| explicit QSensorBackend(QSensor *sensor, QObject *parent = Q_NULLPTR); |
| virtual ~QSensorBackend(); |
| |
| virtual void start() = 0; |
| virtual void stop() = 0; |
| |
| virtual bool isFeatureSupported(QSensor::Feature feature) const; |
| |
| // used by the backend to set metadata properties |
| void addDataRate(qreal min, qreal max); |
| void setDataRates(const QSensor *otherSensor); |
| void addOutputRange(qreal min, qreal max, qreal accuracy); |
| void setDescription(const QString &description); |
| |
| template <typename T> |
| T *setReading(T *readingClass) |
| { |
| if (!readingClass) |
| readingClass = new T(this); |
| setReadings(readingClass, new T(this), new T(this)); |
| return readingClass; |
| } |
| |
| QSensorReading *reading() const; |
| QSensor *sensor() const; |
| |
| // used by the backend to inform us of events |
| void newReadingAvailable(); |
| void sensorStopped(); |
| void sensorBusy(); |
| void sensorError(int error); |
| |
| private: |
| void setReadings(QSensorReading *device, QSensorReading *filter, QSensorReading *cache); |
| |
| Q_DECLARE_PRIVATE(QSensorBackend) |
| Q_DISABLE_COPY(QSensorBackend) |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif |
| |