diff options
Diffstat (limited to 'src/plugins/sensors/ios/iospressure.mm')
-rw-r--r-- | src/plugins/sensors/ios/iospressure.mm | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/plugins/sensors/ios/iospressure.mm b/src/plugins/sensors/ios/iospressure.mm new file mode 100644 index 00000000..d3a9275e --- /dev/null +++ b/src/plugins/sensors/ios/iospressure.mm @@ -0,0 +1,65 @@ +// Copyright (C) 2021 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 + +#include "iospressure.h" +#import <CoreMotion/CoreMotion.h> + +char const * const IOSPressure::id("ios.pressure"); + +QT_BEGIN_NAMESPACE + +int IOSPressure::s_startCount = 0; + +IOSPressure::IOSPressure(QSensor *sensor) + : QSensorBackend(sensor) +{ + m_altimeter = [[CMAltimeter alloc] init]; + setReading<QPressureReading>(&m_reading); + addDataRate(1, 100); // 100Hz +} + +IOSPressure::~IOSPressure() +{ + [m_altimeter stopRelativeAltitudeUpdates]; + [m_altimeter release]; +} + +void IOSPressure::start() +{ + if (m_timer != 0) + return; + + int hz = sensor()->dataRate(); + m_timer = startTimer(1000 / (hz == 0 ? 60 : hz)); + if (++s_startCount == 1) { + [m_altimeter startRelativeAltitudeUpdatesToQueue:[NSOperationQueue mainQueue] + withHandler:^(CMAltitudeData * _Nullable altitudeData , NSError * _Nullable error) { + if (error == nil) { + m_reading.setPressure([altitudeData.pressure doubleValue] * 1000); + m_reading.setTimestamp(quint64(altitudeData.timestamp * 1e6)); + } + }]; + } +} + +void IOSPressure::stop() +{ + if (m_timer == 0) + return; + + killTimer(m_timer); + m_timer = 0; + if (--s_startCount == 0) + [m_altimeter stopRelativeAltitudeUpdates]; +} + +void IOSPressure::timerEvent(QTimerEvent *) +{ + // skip update if NaN or 0 + if ((m_reading.pressure() != m_reading.pressure()) || + m_reading.pressure() == 0) + return; + newReadingAvailable(); +} + +QT_END_NAMESPACE |