author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 14:26:25 +0300 | |
changeset 11 | 06b8e2af4411 |
parent 4 | 90517678cc4f |
child 14 | 6fbed849b4f4 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the Qt Mobility Components. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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|
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// Internal Headers |
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#include "magnetometersensorsym.h" |
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|
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/** |
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* set the id of the magnetometer sensor |
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*/ |
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const char *CMagnetometerSensorSym::id("sym.magnetometer"); |
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/** |
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* Factory function, this is used to create the magnetometer sensor object |
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* @return CMagnetometerSensorSym if successful, leaves on failure |
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*/ |
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CMagnetometerSensorSym* CMagnetometerSensorSym::NewL(QSensor *sensor) |
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{ |
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CMagnetometerSensorSym* self = new (ELeave) CMagnetometerSensorSym(sensor); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CleanupStack::Pop(); |
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return self; |
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} |
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/** |
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* Destructor |
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* Closes the backend resources |
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*/ |
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CMagnetometerSensorSym::~CMagnetometerSensorSym() |
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{ |
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//Closes the backend resources |
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Close(); |
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} |
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/** |
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* Default constructor |
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*/ |
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CMagnetometerSensorSym::CMagnetometerSensorSym(QSensor *sensor):CSensorBackendSym(sensor), |
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iCalibrationLevel(0.0) |
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{ |
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if(sensor) |
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{ |
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setReading<QMagnetometerReading>(&iReading); |
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} |
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iBackendData.iSensorType = KSensrvChannelTypeIdMagnetometerXYZAxisData; |
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//Enable Property listening, required to get Calibration level |
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SetListening(ETrue, ETrue); |
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} |
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|
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/** |
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* start is overridden to allow retrieving initial calibration property before |
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* and to set the required value type flags |
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*/ |
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void CMagnetometerSensorSym::start() |
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{ |
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if(sensor()) |
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{ |
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// Initialize the values |
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iReading.setX(0); |
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iReading.setY(0); |
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iReading.setZ(0); |
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// Set the required type of values |
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QVariant v = sensor()->property("returnGeoValues"); |
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iReturnGeoValues = (v.isValid() && v.toBool()); // if the property isn't set it's false |
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} |
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// get current property value for calibration and set it to reading |
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TSensrvProperty calibration; |
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TRAPD(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropCalibrationLevel,ESensrvSingleProperty, calibration)); |
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// If error in getting the calibration level, continue to start the sensor |
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// as it is not a fatal error |
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if ( err == KErrNone ) |
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110 |
{ |
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TInt calibrationVal; |
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calibration.GetValue(calibrationVal); |
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iCalibrationLevel = calibrationVal * (1.0/3.0); |
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} |
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// Call backend start |
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CSensorBackendSym::start(); |
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} |
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118 |
|
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/* |
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* RecvData is used to retrieve the sensor reading from sensor server |
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* It is implemented here to handle magnetometer sensor specific |
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* reading data and provides conversion and utility code |
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*/ |
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void CMagnetometerSensorSym::RecvData(CSensrvChannel &aChannel) |
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125 |
{ |
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TPckg<TSensrvMagnetometerAxisData> magnetometerpkg( iData ); |
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TInt ret = aChannel.GetData( magnetometerpkg ); |
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if(KErrNone != ret) |
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129 |
{ |
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// If there is no reading available, return without setting |
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return; |
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} |
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// Get a lock on the reading data |
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iBackendData.iReadingLock.Wait(); |
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// If Geo values are requested set it |
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if(iReturnGeoValues) |
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137 |
{ |
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iReading.setX(iData.iAxisXCalibrated); |
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iReading.setY(iData.iAxisYCalibrated); |
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iReading.setZ(iData.iAxisZCalibrated); |
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141 |
} |
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// If Raw values are requested set it |
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143 |
else |
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144 |
{ |
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iReading.setX(iData.iAxisXRaw); |
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iReading.setY(iData.iAxisYRaw); |
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iReading.setZ(iData.iAxisZRaw); |
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148 |
} |
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// Set the timestamp |
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iReading.setTimestamp(iData.iTimeStamp.Int64()); |
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// Set the calibration level |
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iReading.setCalibrationLevel(iCalibrationLevel); |
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// Release the lock |
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iBackendData.iReadingLock.Signal(); |
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155 |
} |
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156 |
|
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157 |
/** |
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* HandlePropertyChange is called from backend, to indicate a change in property |
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*/ |
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void CMagnetometerSensorSym::HandlePropertyChange(CSensrvChannel &/*aChannel*/, const TSensrvProperty &aChangedProperty) |
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161 |
{ |
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if(aChangedProperty.GetPropertyId() != KSensrvPropCalibrationLevel) |
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163 |
{ |
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// Do nothing, if calibration property has not changed |
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return; |
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166 |
} |
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TInt calibrationlevel; |
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aChangedProperty.GetValue(calibrationlevel); |
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// As Qt requires calibration level in qreal but symbian provides in enum |
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// It has been agreed with DS Team that the following mechanism will be |
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// used till discussions with qt mobility are complete |
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iCalibrationLevel = (1.0/3.0) * calibrationlevel; |
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173 |
} |
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174 |
|
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/* |
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* Used to retrieve the current calibration level |
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* iCalibrationLevel is automatically updated whenever there is a change |
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* in calibration level |
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179 |
*/ |
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qreal CMagnetometerSensorSym::GetCalibrationLevel() |
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181 |
{ |
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return iCalibrationLevel; |
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183 |
} |
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184 |
|
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185 |
/** |
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* Second phase constructor |
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* Initialize the backend resources |
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188 |
*/ |
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void CMagnetometerSensorSym::ConstructL() |
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190 |
{ |
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InitializeL(); |
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192 |
} |
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193 |