Revision control
++ // Copyright (C) 2016 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
++ // Qt-Security score:significant reason:default
++
++ #import <CoreLocation/CLHeading.h>
++ #import <CoreLocation/CLLocationManagerDelegate.h>
++ #include <QtCore/qglobal.h>
++
++ #include "ioscompass.h"
++
++ char const * const IOSCompass::id("ios.compass");
++
++ QT_BEGIN_NAMESPACE
++
++ @interface locationDelegate : NSObject <CLLocationManagerDelegate>
++ {
++ IOSCompass *m_iosCompass;
++ }
++ @end
++
++ @implementation locationDelegate
++
++ - (id)initWithQIOSCompass:(IOSCompass*)iosCompass
++ {
++ self = [super init];
++ if (self) {
++ m_iosCompass = iosCompass;
++ }
++ return self;
++ }
++
++ - (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading
++ {
++ Q_UNUSED(manager);
++ // Convert NSDate to microseconds:
++ quint64 timestamp = quint64(newHeading.timestamp.timeIntervalSinceReferenceDate * 1e6);
++ double accuracy = newHeading.headingAccuracy;
++ // Accuracy is the maximum number of degrees the reading can be off. The QtSensors scale
++ // goes from 1 to 0, with 1 being the best (0 degrees off), and 0 worst (360 degrees off):
++ qreal calibrationLevel = (accuracy < 0) ? 0 : qMax(0., 1 - (accuracy / 360));
++ qreal heading = qreal(newHeading.magneticHeading);
++ m_iosCompass->headingChanged(heading, timestamp, calibrationLevel);
++ }
++
++ - (BOOL)locationManagerShouldDisplayHeadingCalibration:(CLLocationManager *)manager
++ {
++ Q_UNUSED(manager);
++ return YES;
++ }
++
++ @end
++
++ IOSCompass::IOSCompass(QSensor *sensor)
++ : QSensorBackend(sensor)
++ , m_locationManager(0)
++ {
++ setReading<QCompassReading>(&m_reading);
++ addDataRate(1, 70);
++ addOutputRange(0, 359, 1);
++ }
++
++ IOSCompass::~IOSCompass()
++ {
++ [m_locationManager release];
++ }
++
++ void IOSCompass::start()
++ {
++ if (!m_locationManager) {
++ m_locationManager = [[CLLocationManager alloc] init];
++ m_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
++ m_locationManager.headingFilter = kCLHeadingFilterNone;
++ m_locationManager.delegate = [[locationDelegate alloc] initWithQIOSCompass:this];
++ }
++ [m_locationManager startUpdatingHeading];
++ }
++
++ void IOSCompass::headingChanged(qreal heading, quint64 timestamp, qreal calibrationLevel)
++ {
++ m_reading.setAzimuth(heading);
++ m_reading.setTimestamp(timestamp);
++ m_reading.setCalibrationLevel(calibrationLevel);
++ newReadingAvailable();
++ }
++
++ void IOSCompass::stop()
++ {
++ [m_locationManager stopUpdatingHeading];
++ }
++
++ QT_END_NAMESPACE