--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtmobility/plugins/sensors/symbian/magnetometersensorsym.cpp Mon May 03 13:18:40 2010 +0300
@@ -0,0 +1,193 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// Internal Headers
+#include "magnetometersensorsym.h"
+
+/**
+ * set the id of the magnetometer sensor
+ */
+const char *CMagnetometerSensorSym::id("sym.magnetometer");
+
+/**
+ * Factory function, this is used to create the magnetometer sensor object
+ * @return CMagnetometerSensorSym if successful, leaves on failure
+ */
+CMagnetometerSensorSym* CMagnetometerSensorSym::NewL(QSensor *sensor)
+ {
+ CMagnetometerSensorSym* self = new (ELeave) CMagnetometerSensorSym(sensor);
+ CleanupStack::PushL(self);
+ self->ConstructL();
+ CleanupStack::Pop();
+ return self;
+ }
+
+/**
+ * Destructor
+ * Closes the backend resources
+ */
+CMagnetometerSensorSym::~CMagnetometerSensorSym()
+ {
+ //Closes the backend resources
+ Close();
+ }
+
+/**
+ * Default constructor
+ */
+CMagnetometerSensorSym::CMagnetometerSensorSym(QSensor *sensor):CSensorBackendSym(sensor),
+ iCalibrationLevel(0.0)
+ {
+ if(sensor)
+ {
+ setReading<QMagnetometerReading>(&iReading);
+ }
+ iBackendData.iSensorType = KSensrvChannelTypeIdMagnetometerXYZAxisData;
+ //Enable Property listening, required to get Calibration level
+ SetListening(ETrue, ETrue);
+ }
+
+/**
+ * start is overridden to allow retrieving initial calibration property before
+ * and to set the required value type flags
+ */
+void CMagnetometerSensorSym::start()
+ {
+ if(sensor())
+ {
+ // Initialize the values
+ iReading.setX(0);
+ iReading.setY(0);
+ iReading.setZ(0);
+ // Set the required type of values
+ QVariant v = sensor()->property("returnGeoValues");
+ iReturnGeoValues = (v.isValid() && v.toBool()); // if the property isn't set it's false
+ }
+ // get current property value for calibration and set it to reading
+ TSensrvProperty calibration;
+ TRAPD(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropCalibrationLevel,ESensrvSingleProperty, calibration));
+ // If error in getting the calibration level, continue to start the sensor
+ // as it is not a fatal error
+ if ( err == KErrNone )
+ {
+ TInt calibrationVal;
+ calibration.GetValue(calibrationVal);
+ iCalibrationLevel = calibrationVal * (1.0/3.0);
+ }
+ // Call backend start
+ CSensorBackendSym::start();
+ }
+
+/*
+ * RecvData is used to retrieve the sensor reading from sensor server
+ * It is implemented here to handle magnetometer sensor specific
+ * reading data and provides conversion and utility code
+ */
+void CMagnetometerSensorSym::RecvData(CSensrvChannel &aChannel)
+ {
+ TPckg<TSensrvMagnetometerAxisData> magnetometerpkg( iData );
+ TInt ret = aChannel.GetData( magnetometerpkg );
+ if(KErrNone != ret)
+ {
+ // If there is no reading available, return without setting
+ return;
+ }
+ // Get a lock on the reading data
+ iBackendData.iReadingLock.Wait();
+ // If Geo values are requested set it
+ if(iReturnGeoValues)
+ {
+ iReading.setX(iData.iAxisXCalibrated);
+ iReading.setY(iData.iAxisYCalibrated);
+ iReading.setZ(iData.iAxisZCalibrated);
+ }
+ // If Raw values are requested set it
+ else
+ {
+ iReading.setX(iData.iAxisXRaw);
+ iReading.setY(iData.iAxisYRaw);
+ iReading.setZ(iData.iAxisZRaw);
+ }
+ // Set the timestamp
+ iReading.setTimestamp(iData.iTimeStamp.Int64());
+ // Set the calibration level
+ iReading.setCalibrationLevel(iCalibrationLevel);
+ // Release the lock
+ iBackendData.iReadingLock.Signal();
+ }
+
+/**
+ * HandlePropertyChange is called from backend, to indicate a change in property
+ */
+void CMagnetometerSensorSym::HandlePropertyChange(CSensrvChannel &/*aChannel*/, const TSensrvProperty &aChangedProperty)
+ {
+ if(aChangedProperty.GetPropertyId() != KSensrvPropCalibrationLevel)
+ {
+ // Do nothing, if calibration property has not changed
+ return;
+ }
+ TInt calibrationlevel;
+ aChangedProperty.GetValue(calibrationlevel);
+ // As Qt requires calibration level in qreal but symbian provides in enum
+ // It has been agreed with DS Team that the following mechanism will be
+ // used till discussions with qt mobility are complete
+ iCalibrationLevel = (1.0/3.0) * calibrationlevel;
+ }
+
+/*
+ * Used to retrieve the current calibration level
+ * iCalibrationLevel is automatically updated whenever there is a change
+ * in calibration level
+ */
+qreal CMagnetometerSensorSym::GetCalibrationLevel()
+ {
+ return iCalibrationLevel;
+ }
+
+/**
+ * Second phase constructor
+ * Initialize the backend resources
+ */
+void CMagnetometerSensorSym::ConstructL()
+ {
+ InitializeL();
+ }
+