1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

     3 <!-- This component and the accompanying materials are made available under the terms of the License 

     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE task

    11   PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

    12 <task id="GUID-047E3462-F806-4C54-9DC5-6B78907CA949" xml:lang="en"><title>Derive

    13 a class and implement the appropriate observer functions</title><prolog><metadata><keywords/></metadata></prolog><taskbody>

    14 <context>       <p>Derive a class from one or more of the observer interfaces

    15 above, and implement the appropriate observer functions.</p><p>The following

    16 code snippet demonstrates how to derive a class and implement the appropriate

    17 functions.</p><codeblock id="GUID-FF4BD289-9ECC-5E01-A38C-3E428817883E" xml:space="preserve">#include HWRMPower.h

    18 Class CPowerApp : public CBase,

    19                   public MHWRMBatteryPowerObserver,

    20                   public MHWRMBatteryChargingStatusObserver

    21 {

    22 public:

    23     CPowerApp(); //constructor

    24     ~CPowerApp();  //destructor

    25     void ConstructL();

    26     static CPowerApp* NewL();

    27     // from MHWRMBatteryPowerObserver

    28     virtual void PowerMeasurement( TInt aErr,

    29                                    TInt aMeasurement );

    30     // from MHWRMBatteryChargingStatusObserver

    31     virtual void ChargingStatusChange( Tint aErrCode,

    32                                        CHWRMPower::TBatteryChargingStatus aChrgStatus );

    33 

    34 private:

    35     CHWRMPower* iPower;

    36 };

    37 

    38 

    39 //Implementation of MHWRMBatteryPowerObserver::PowerMeasurement()

    40 

    41 void CPowerApp::PowerMeasurement( TInt aErr,

    42                                   TInt aMeasurement )

    43     {

    44     if( aErrorCode == KErrNone )

    45          {

    46          INFO_PRINTF2( _L( "INFO: Power Consumption Measurement Received,

    47                             measurement=%d" ), aMeasurement );

    48          }

    49     else

    50          {

    51          INFO_PRINTF2( _L( "INFO: Power Consumption Measurement Error,

    52                             error=%d" ), aErr );

    53          }

    54     }</codeblock></context>

    55 </taskbody></task>