--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugin/poi/landmarks/overlay/src/Magnetometer.cpp	Fri Jun 25 12:50:05 2010 +0200
@@ -0,0 +1,155 @@
+/*
+ * Name        : Magnetometer.cpp
+ * Description : Magnetometer helper class
+ * Project     : This file is part of OpenMAR, an Open Mobile Augmented Reality browser
+ * Website     : http://OpenMAR.org
+ *
+ * Copyright (c) 2010 David Caabeiro
+ *
+ * All rights reserved. This program and the accompanying materials are made available 
+ * under the terms of the Eclipse Public License v1.0 which accompanies this 
+ * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
+ *
+ */
+
+#include "Magnetometer.h"
+
+#include <SensrvMagnetometerSensor.h>
+
+#include <SensrvChannel.h>
+#include <SensrvChannelFinder.h>
+#include <SensrvChannelInfo.h>
+#include <SensrvProperty.h>
+
+CMagnetometer* CMagnetometer::NewL()
+{
+    CMagnetometer* self = new(ELeave) CMagnetometer;
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+
+    return self;
+}
+
+CMagnetometer::~CMagnetometer()
+{
+    iSensorChannel->CloseChannel();
+}
+
+CMagnetometer::CMagnetometer()
+{}
+
+void CMagnetometer::ConstructL()
+{
+    CSensrvChannelFinder* sensorChannelFinder = CSensrvChannelFinder::NewLC();
+
+    RSensrvChannelInfoList channelInfoList;
+    CleanupClosePushL(channelInfoList);
+
+    TSensrvChannelInfo mySearchConditions;
+    mySearchConditions.iChannelType = KSensrvChannelTypeIdMagnetometerXYZAxisData;
+
+    sensorChannelFinder->FindChannelsL(channelInfoList, mySearchConditions);
+
+    TSensrvChannelInfo channelInfo;
+
+    if (channelInfoList.Count() > 0)
+        channelInfo = channelInfoList[0];
+    else
+        User::Leave(KErrNotFound);
+
+    CleanupStack::PopAndDestroy(&channelInfoList);
+    CleanupStack::PopAndDestroy(sensorChannelFinder);
+
+    iSensorChannel = CSensrvChannel::NewL(channelInfo);
+    iSensorChannel->OpenChannelL();
+
+    // Get current calibration value
+    TSensrvProperty property;
+    iSensorChannel->GetPropertyL(KSensrvPropCalibrationLevel, KSensrvItemIndexNone, property);
+    TInt calibration = 0;
+    property.GetValue(calibration);
+
+    iCalibration = calibration == 0? ENone :
+                   calibration == 1? ELow :
+                   calibration == 2? EModerate :
+                   calibration == 3? EHigh : ENone;
+
+    iSensorChannel->SetPropertyListenerL(this);
+}
+
+void CMagnetometer::StartL()
+{
+    iSensorChannel->StartDataListeningL(this, 1, 4, 0);
+}
+
+void CMagnetometer::Stop()
+{
+    iSensorChannel->StopDataListening();
+}
+
+void CMagnetometer::DataReceived(CSensrvChannel& aChannel, TInt aCount, TInt aDataLost)
+{
+    if (aChannel.GetChannelInfo().iChannelType ==  KSensrvChannelTypeIdMagnetometerXYZAxisData)
+    {
+        TPckgBuf<TSensrvMagnetometerAxisData> dataBuffer;
+        TSensrvMagnetometerAxisData data;
+
+        for (TInt i = 0; i < aCount; ++i)
+        {
+            aChannel.GetData(dataBuffer);
+
+            data = dataBuffer();
+            // Do something with the date in data variable
+            // data.iTimeStamp
+
+            // Compensate axis for landscape mode
+            TInt x = -data.iAxisYCalibrated;
+            TInt y =  data.iAxisXCalibrated;
+            TInt z =  data.iAxisZCalibrated;
+#if 0
+            TInt x = data.iAxisXCalibrated;
+            TInt y = data.iAxisYCalibrated;
+            TInt z = data.iAxisZCalibrated;
+#endif
+            const TReal KPole = 0.85;
+
+            iX = KPole * iX + (1.0 - KPole) * x;
+            iY = KPole * iY + (1.0 - KPole) * y;
+            iZ = KPole * iZ + (1.0 - KPole) * z;
+        }
+    }
+}
+
+void CMagnetometer::DataError(CSensrvChannel& aChannel, TSensrvErrorSeverity aError)
+{
+}
+
+void CMagnetometer::GetDataListenerInterfaceL(TUid aInterfaceUid, TAny*& aInterface)
+{}
+
+void CMagnetometer::PropertyChanged(CSensrvChannel& aChannel, const TSensrvProperty& aChangedProperty)
+{
+    TSensrvChannelInfo info = aChannel.GetChannelInfo();
+
+    if (info.iChannelType == KSensrvChannelTypeIdMagnetometerXYZAxisData &&
+            aChangedProperty.GetPropertyId() == KSensrvPropCalibrationLevel)
+    {
+        TInt calibration = 0;
+        aChangedProperty.GetValue(calibration);
+
+        iCalibration = calibration == 0? ENone :
+                       calibration == 1? ELow :
+                       calibration == 2? EModerate :
+                       calibration == 3? EHigh : ENone;
+    }
+}
+
+void CMagnetometer::PropertyError(CSensrvChannel& aChannel, TSensrvErrorSeverity aError)
+{}
+
+void CMagnetometer::SetPropertySuccessIndicationChanged(TSetPropertySuccessIndicator aIndication)
+{}
+
+void CMagnetometer::GetPropertyListenerInterfaceL(TUid aInterfaceUid, TAny*& aInterface)
+{}