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Diffstat (limited to 'src/plugins/sensors/winrt/winrtcompass.cpp')
-rw-r--r-- | src/plugins/sensors/winrt/winrtcompass.cpp | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/src/plugins/sensors/winrt/winrtcompass.cpp b/src/plugins/sensors/winrt/winrtcompass.cpp new file mode 100644 index 00000000..bc2430f2 --- /dev/null +++ b/src/plugins/sensors/winrt/winrtcompass.cpp @@ -0,0 +1,224 @@ +/**************************************************************************** +** +** Copyright (C) 2014 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "winrtcompass.h" +#include "winrtcommon.h" + +#include <QtSensors/QCompass> + +QT_USE_NAMESPACE + +#include <wrl.h> +#include <windows.devices.sensors.h> +using namespace Microsoft::WRL; +using namespace Microsoft::WRL::Wrappers; +using namespace ABI::Windows::Foundation; +using namespace ABI::Windows::Devices::Sensors; + +typedef ITypedEventHandler<Compass *, CompassReadingChangedEventArgs *> CompassReadingHandler; + +QT_USE_NAMESPACE + +class WinRtCompassPrivate +{ +public: + WinRtCompassPrivate(WinRtCompass *p) + : minimumReportInterval(0), q(p) + { + token.value = 0; + } + + QCompassReading reading; + + ComPtr<ICompass> sensor; + EventRegistrationToken token; + quint32 minimumReportInterval; + + HRESULT readingChanged(ICompass *, ICompassReadingChangedEventArgs *args) + { + ComPtr<ICompassReading> value; + HRESULT hr = args->get_Reading(&value); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Failed to get light sensor reading." << qt_error_string(hr); + return hr; + } + + DOUBLE heading; + hr = value->get_HeadingMagneticNorth(&heading); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Failed to get compass heading." << qt_error_string(hr); + return hr; + } + + DateTime dateTime; + hr = value->get_Timestamp(&dateTime); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Failed to get compass reading timestamp." << qt_error_string(hr); + return hr; + } +#ifndef Q_OS_WINPHONE // Windows Phone doesn't implement the accuracy interface + ComPtr<ICompassReadingHeadingAccuracy> accuracyReading; + hr = value.As(&accuracyReading); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Failed to cast compass reading to obtain accuracy." << qt_error_string(hr); + return hr; + } + + MagnetometerAccuracy accuracy; + hr = accuracyReading->get_HeadingAccuracy(&accuracy); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Failed to get compass reading accuracy." << qt_error_string(hr); + return hr; + } + + switch (accuracy) { + default: + case MagnetometerAccuracy_Unknown: + reading.setCalibrationLevel(0.00); + break; + case MagnetometerAccuracy_Unreliable: + reading.setCalibrationLevel(0.33); + break; + case MagnetometerAccuracy_Approximate: + reading.setCalibrationLevel(0.67); + break; + case MagnetometerAccuracy_High: + reading.setCalibrationLevel(1.00); + break; + } +#endif + reading.setAzimuth(heading); + reading.setTimestamp(dateTimeToMsSinceEpoch(dateTime)); + q->newReadingAvailable(); + return S_OK; + } + +private: + WinRtCompass *q; +}; + +WinRtCompass::WinRtCompass(QSensor *sensor) + : QSensorBackend(sensor), d_ptr(new WinRtCompassPrivate(this)) +{ + Q_D(WinRtCompass); + HStringReference classId(RuntimeClass_Windows_Devices_Sensors_Compass); + ComPtr<ICompassStatics> factory; + HRESULT hr = RoGetActivationFactory(classId.Get(), IID_PPV_ARGS(&factory)); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Unable to initialize light sensor factory." + << qt_error_string(hr); + sensorError(hr); + return; + } + + hr = factory->GetDefault(&d->sensor); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Unable to get default light sensor." + << qt_error_string(hr); + sensorError(hr); + return; + } + + hr = d->sensor->get_MinimumReportInterval(&d->minimumReportInterval); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Unable to get the minimum report interval." + << qt_error_string(hr); + sensorError(hr); + return; + } + + setReading<QCompassReading>(&d->reading); +} + +WinRtCompass::~WinRtCompass() +{ +} + +void WinRtCompass::start() +{ + Q_D(WinRtCompass); + if (!d->sensor) + return; + if (d->token.value) + return; + + ComPtr<CompassReadingHandler> callback = + Callback<CompassReadingHandler>(d, &WinRtCompassPrivate::readingChanged); + HRESULT hr = d->sensor->add_ReadingChanged(callback.Get(), &d->token); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Unable to attach to reading changed event." + << qt_error_string(hr); + sensorError(hr); + return; + } + quint32 reportInterval = qMax(d->minimumReportInterval, quint32(1000/sensor()->dataRate())); + hr = d->sensor->put_ReportInterval(reportInterval); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Unable to attach to set report interval." + << qt_error_string(hr); + sensorError(hr); + } +} + +void WinRtCompass::stop() +{ + Q_D(WinRtCompass); + if (!d->sensor) + return; + if (!d->token.value) + return; + + HRESULT hr = d->sensor->remove_ReadingChanged(d->token); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Unable to detach from reading changed event." + << qt_error_string(hr); + sensorError(hr); + return; + } + d->sensor->put_ReportInterval(0); + if (FAILED(hr)) { + qCWarning(lcWinRtSensors) << "Unable to reset report interval." + << qt_error_string(hr); + sensorError(hr); + return; + } + d->token.value = 0; +} |