diff options
author | Richard Moe Gustavsen <richard.gustavsen@digia.com> | 2013-04-08 11:24:19 +0200 |
---|---|---|
committer | The Qt Project <gerrit-noreply@qt-project.org> | 2013-04-16 21:23:38 +0200 |
commit | 48b6efda253189ea7e3c3238c10cdced61927a10 (patch) | |
tree | 9c7e18123f1c0ff51d36c6e7600dc5283f8aa181 /src/plugins/sensors/ios/ioscompass.mm | |
parent | a16f81a365b7d9a6629b04bd298a3b45fc1b7628 (diff) |
iOS: implement compass
Change-Id: I639a472cd2dfca177282cb4961d589f11f924e36
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
Diffstat (limited to 'src/plugins/sensors/ios/ioscompass.mm')
-rw-r--r-- | src/plugins/sensors/ios/ioscompass.mm | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/plugins/sensors/ios/ioscompass.mm b/src/plugins/sensors/ios/ioscompass.mm new file mode 100644 index 00000000..ded26e3d --- /dev/null +++ b/src/plugins/sensors/ios/ioscompass.mm @@ -0,0 +1,128 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtSensors module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 (365 degrees off): + qreal calibrationLevel = (accuracy < 0) ? 0 : qMax(0., 1 - (accuracy / 365)); + 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 |