plugin/poi/landmarks/overlay/inc/Magnetometer.h
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     1 /*
       
     2  * Name        : Magnetometer.h
       
     3  * Description : Magnetometer helper class
       
     4  * Project     : This file is part of OpenMAR, an Open Mobile Augmented Reality browser
       
     5  * Website     : http://OpenMAR.org
       
     6  *
       
     7  * Copyright (c) 2010 David Caabeiro
       
     8  *
       
     9  * All rights reserved. This program and the accompanying materials are made available 
       
    10  * under the terms of the Eclipse Public License v1.0 which accompanies this 
       
    11  * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
       
    12  *
       
    13  */
       
    14 
       
    15 #ifndef MAGNETOMETER_H_
       
    16 #define MAGNETOMETER_H_
       
    17 
       
    18 #include "Vector3d.h"
       
    19 
       
    20 #include <SensrvDataListener.h>
       
    21 #include <SensrvPropertyListener.h>
       
    22 
       
    23 class CSensrvChannel;
       
    24 
       
    25 /**
       
    26  * @brief Wrapper class over sensor channel to retrieve data from 3-axis magnetometer
       
    27  * 
       
    28  * This class also implements a simple lowpass filter
       
    29  */
       
    30 class CMagnetometer : public CBase,
       
    31             public MSensrvDataListener,
       
    32             public MSensrvPropertyListener
       
    33 {
       
    34 public:
       
    35     static CMagnetometer* NewL();
       
    36     ~CMagnetometer();
       
    37 
       
    38 protected:
       
    39     CMagnetometer();
       
    40     void ConstructL();
       
    41 
       
    42 public:
       
    43     void StartL();
       
    44     void Stop();
       
    45 
       
    46     const Vector3d GetValue() const { return Vector3d(iX, iY, iZ); }
       
    47 
       
    48     enum TCalibration {
       
    49         ENone,
       
    50         ELow,
       
    51         EModerate,
       
    52         EHigh
       
    53     };
       
    54 
       
    55     TCalibration Calibration() const { return iCalibration; }
       
    56 
       
    57 protected:
       
    58     // From MSensrvDataListener
       
    59     void DataReceived(CSensrvChannel& aChannel, TInt aCount, TInt aDataLost);
       
    60     void DataError(CSensrvChannel& aChannel, TSensrvErrorSeverity aError);
       
    61     void GetDataListenerInterfaceL(TUid aInterfaceUid, TAny*& aInterface);
       
    62 
       
    63     // From MSensrvPropertyListener
       
    64     void PropertyChanged(CSensrvChannel& aChannel, const TSensrvProperty& aChangedProperty);
       
    65     void PropertyError(CSensrvChannel& aChannel, TSensrvErrorSeverity aError);
       
    66     void SetPropertySuccessIndicationChanged(TSetPropertySuccessIndicator aIndication);
       
    67     void GetPropertyListenerInterfaceL(TUid aInterfaceUid, TAny*& aInterface);
       
    68 
       
    69 private:
       
    70     CSensrvChannel* iSensorChannel;
       
    71 
       
    72     TReal iX;
       
    73     TReal iY;
       
    74     TReal iZ;
       
    75 
       
    76     TCalibration iCalibration;
       
    77 };
       
    78 
       
    79 #endif