S60 3rd Edition SDK for Symbian OS Example Applications Guide

HWRMTestAppPropertyObserver.cpp

/*
* ==============================================================================
*  Name        : HWRMTestAppPropertyObserver.cpp
*  Part of     : HWRMTestApp
*  Interface   : 
*  Description : Hardware Resource Manager server Light common data object
*                implementation
*  Version     : 
*
*  Copyright (c) 2002-2006 Nokia Corporation.
*  This material, including documentation and any related 
*  computer programs, is protected by copyright controlled by 
*  Nokia Corporation. 
* ==============================================================================
*/

// INCLUDE FILES
#include <HWRMPowerStateSDKPSKeys.h>
#include "HWRMTestAppContainer.h"
#include "HWRMTestAppPropertyObserver.h"


// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------
// CHWRMTestAppPropertyObserver::CHWRMTestAppPropertyObserver
// C++ constructor
// -----------------------------------------------------------------------------
//
CHWRMTestAppPropertyObserver::CHWRMTestAppPropertyObserver( 
        const TUid aUid, const TUint32 aKey,
        const CHWRMTestAppContainer* aAppContainer )
            : CActive(EPriority), iUid( aUid ),
              iKey( aKey ), iAppContainer( aAppContainer)
        {
        }

// -----------------------------------------------------------------------------
// CHWRMTestAppPropertyObserver::NewL
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CHWRMTestAppPropertyObserver* CHWRMTestAppPropertyObserver::NewL(
                                     const TUid aUid, const TUint32 aKey,
                                     const CHWRMTestAppContainer* aAppContainer )
        {
        CHWRMTestAppPropertyObserver* me=
            new(ELeave) CHWRMTestAppPropertyObserver( aUid, aKey, aAppContainer );
        CleanupStack::PushL(me);
        me->ConstructL();
        CleanupStack::Pop(me);
        return me;
        }

// -----------------------------------------------------------------------------
// CHWRMTestAppPropertyObserver::ConstructL
// Symbian 2nd phase constructor can leave.
// -----------------------------------------------------------------------------
//
void CHWRMTestAppPropertyObserver::ConstructL()
        {
    User::LeaveIfError( iProperty.Attach( iUid, iKey ) );

        CActiveScheduler::Add(this);
        // initial subscription and process current property value
        RunL();
        }

// -----------------------------------------------------------------------------
// CHWRMTestAppPropertyObserver::~CHWRMTestAppPropertyObserver
// Destructor
// -----------------------------------------------------------------------------
//
CHWRMTestAppPropertyObserver::~CHWRMTestAppPropertyObserver()
        {
        Cancel();
        iProperty.Close();
        }

// -----------------------------------------------------------------------------
// CHWRMTestAppPropertyObserver::DoCancel
// 
// -----------------------------------------------------------------------------
//
void CHWRMTestAppPropertyObserver::DoCancel()
        {
        iProperty.Cancel();
        }

// -----------------------------------------------------------------------------
// CHWRMTestAppPropertyObserver::RunL
// 
// -----------------------------------------------------------------------------
//
void CHWRMTestAppPropertyObserver::RunL()
        {
        // resubscribe before processing new value to prevent missing updates
    iProperty.Subscribe( iStatus );
        SetActive();

    TBuf<100> msg;

    switch( iKey )
        {
        case KHWRMBatteryLevel:
            {
            _LIT(KBatteryLevel, "KHWRMBatteryLevel updated");
            iAppContainer->AddMessageL( KBatteryLevel );
                break;
            }
        case KHWRMBatteryStatus:
            {
            _LIT(KBatteryStatus, "KHWRMBatteryStatus updated");
            iAppContainer->AddMessageL( KBatteryStatus );
                break;
            }
        case KHWRMChargingStatus:
            {
            _LIT(KChargingStatus, "KHWRMChargingStatus updated");
            iAppContainer->AddMessageL( KChargingStatus );
                break;
            }
        default:
            break;
        }

        // property updated, get new value
        TInt keyValue;
        if( iProperty.Get( keyValue ) == KErrNotFound )
                {
                // property deleted, do necessary actions here...
                _LIT(KPropertyDeleted, "Property deleted!");
        msg.Format( KPropertyDeleted );
        }
        else
                {
                // use new value ...
                _LIT(KNewValue, "New value = %d");
                msg.Format( KNewValue, keyValue );
        }

    iAppContainer->AddMessageL( msg );
        }

//  End of File  

---

© Nokia 2006