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39
40#ifndef QSENSORBACKEND_H
41#define QSENSORBACKEND_H
42
43#include <QtSensors/qsensor.h>
44#include <QtSensors/qsensormanager.h>
45
46QT_BEGIN_NAMESPACE
47
48class QSensorBackendPrivate;
49
50class Q_SENSORS_EXPORT QSensorBackend : public QObject
51{
52 Q_OBJECT
53public:
54 explicit QSensorBackend(QSensor *sensor, QObject *parent = Q_NULLPTR);
55 virtual ~QSensorBackend();
56
57 virtual void start() = 0;
58 virtual void stop() = 0;
59
60 virtual bool isFeatureSupported(QSensor::Feature feature) const;
61
62 // used by the backend to set metadata properties
63 void addDataRate(qreal min, qreal max);
64 void setDataRates(const QSensor *otherSensor);
65 void addOutputRange(qreal min, qreal max, qreal accuracy);
66 void setDescription(const QString &description);
67
68 template <typename T>
69 T *setReading(T *readingClass)
70 {
71 if (!readingClass)
72 readingClass = new T(this);
73 setReadings(device: readingClass, filter: new T(this), cache: new T(this));
74 return readingClass;
75 }
76
77 QSensorReading *reading() const;
78 QSensor *sensor() const;
79
80 // used by the backend to inform us of events
81 void newReadingAvailable();
82 void sensorStopped();
83 void sensorBusy();
84 void sensorError(int error);
85
86private:
87 void setReadings(QSensorReading *device, QSensorReading *filter, QSensorReading *cache);
88
89 Q_DECLARE_PRIVATE(QSensorBackend)
90 Q_DISABLE_COPY(QSensorBackend)
91};
92
93QT_END_NAMESPACE
94
95#endif
96
97

source code of qtsensors/src/sensors/qsensorbackend.h