Revision control
+ // Copyright (C) 2025 The Qt Company Ltd.
+ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+ #ifndef OHOSSENSORBACKENDBASE_H
+ #define OHOSSENSORBACKENDBASE_H
+
+ #include <QSensorBackend>
+ #include <QtCore/private/qohoslogger_p.h>
+ #include <limits>
+ #include <ohossensorsmanager.h>
+
+ template<typename T>
+ class OhosSensorBackendBase : public QSensorBackend
+ {
+ public:
+ OhosSensorBackendBase(QSensor *sensor, bool absoluteValueSensor = false);
+ virtual ~OhosSensorBackendBase();
+
+ void start() final;
+ void stop() final;
+
+ protected:
+ virtual void processSensorData(const OhosSensorData &sensorData) = 0;
+ T m_reading;
+ };
+
+ template<typename T>
+ OhosSensorBackendBase<T>::OhosSensorBackendBase(QSensor *sensor, bool absoluteValueSensor)
+ : QSensorBackend(sensor)
+ {
+ setReading<T>(&m_reading);
+ auto capabilities = OhosSensorsManager::instance()->tryGetSensorCapabilities(sensor);
+ if (capabilities.has_value()) {
+ auto capabilitiesData = capabilities.value();
+
+ addOutputRange(
+ absoluteValueSensor
+ ? 0.0
+ : std::numeric_limits<qreal>::lowest(),
+ std::numeric_limits<qreal>::max(),
+ capabilitiesData.resolution);
+
+ addDataRate(capabilitiesData.minDataRate, capabilitiesData.maxDataRate);
+ } else {
+ qOhosPrintfError("%s: Cannot obtain sensor capabilities.", Q_FUNC_INFO);
+ }
+ }
+
+ template<typename T>
+ OhosSensorBackendBase<T>::~OhosSensorBackendBase()
+ {
+ stop();
+ }
+
+ template<typename T>
+ void OhosSensorBackendBase<T>::start()
+ {
+ if (sensor()->dataRate() == 0) {
+ constexpr int defaultDataRate = 5;
+ auto availableDataRates = sensor()->availableDataRates();
+ sensor()->setDataRate(
+ !availableDataRates.isEmpty() && availableDataRates.first().first != 0
+ ? availableDataRates.first().first
+ : defaultDataRate);
+ }
+
+ OhosSensorsManager::instance()->subscribeSensor(
+ sensor(),
+ [this](const OhosSensorData &data) {
+ processSensorData(data);
+ });
+ }
+
+ template<typename T>
+ void OhosSensorBackendBase<T>::stop()
+ {
+ OhosSensorsManager::instance()->unsubscribeSensor(sensor());
+ }
+
+ #endif