// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

// INCLUDE FILES

#include <e32std.h>

#include <bacntf.h>

#include "BTGPSEnvChangeHandler.h"

#include "BTGPSRequestManager.h"

#include "BTGPSLogging.h"

// EXTERNAL DATA STRUCTURES

// EXTERNAL FUNCTION PROTOTYPES  

// CONSTANTS

// MACROS

// LOCAL CONSTANTS AND MACROS

// MODULE DATA STRUCTURES

// LOCAL FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// ============================= LOCAL FUNCTIONS ===============================

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

// -----------------------------------------------------------------------------

// CBTGPSEnvChangeHandler::NewL

// -----------------------------------------------------------------------------

CBTGPSEnvChangeHandler* CBTGPSEnvChangeHandler::NewL(

        CBTGPSRequestManager& aRequestManager)

    {

    CBTGPSEnvChangeHandler* self = new (ELeave) CBTGPSEnvChangeHandler(

        aRequestManager);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop();

    return self;

    }

// -----------------------------------------------------------------------------

// CBTGPSEnvChangeHandler::~CBTGPSEnvChangeHandler

// -----------------------------------------------------------------------------

CBTGPSEnvChangeHandler::~CBTGPSEnvChangeHandler()

    {

    if(iEnvChangeNotifier!=NULL)

        {

        iEnvChangeNotifier->Cancel();

        }

    delete iEnvChangeNotifier;

    }

// -----------------------------------------------------------------------------

// CBTGPSEnvChangeHandler::ConstructL

// -----------------------------------------------------------------------------

void CBTGPSEnvChangeHandler::ConstructL()

    {

    iEnvChangeNotifier = 

        CEnvironmentChangeNotifier::NewL(

            CActive::EPriorityStandard, 

            TCallBack(NotifierCallBack, this));

    iEnvChangeNotifier->Start();

    }

// -----------------------------------------------------------------------------

// CBTGPSEnvChangeHandler::CBTGPSEnvChangeHandler

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

CBTGPSEnvChangeHandler::CBTGPSEnvChangeHandler(

        CBTGPSRequestManager& aRequestManager) : 

    iRequestManager(aRequestManager)

    {

    }

// -----------------------------------------------------------------------------

// CBTGPSEnvChangeHandler::NotifierCallBack

// -----------------------------------------------------------------------------

TInt CBTGPSEnvChangeHandler::NotifierCallBack(TAny* aPtr)

    {

    reinterpret_cast<CBTGPSEnvChangeHandler*>(aPtr)->HandleEnvironmentChange();

    return KErrNone;

    }

// -----------------------------------------------------------------------------

// CBTGPSEnvChangeHandler:HandleEnvironmentChange

// 

// Currently we are only interested of system time change. This function is also

// called once immediately after enviroment change notifier object is

// constructed.

//

// NOTE: This function can be used to detect changes in phone power supply

// in case this information is needed to change the functionality depending of

// whether external power supply is connected or not.

//

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CBTGPSEnvChangeHandler::HandleEnvironmentChange()

    {

    TRACESTRING("CBTGPSEnvChangeHandler::HandleEnvironmentChange start...")

    // This function is called once always after construction, in this

    // case we don't even need to check reason

    // --> "Filter out" this initialization

    if (!iEnvChangeNotifierInitialized)

        {

        iEnvChangeNotifierInitialized = ETrue;

        return;

        }

    // Get reason why this function was called

    TInt envChange = iEnvChangeNotifier->Change();

    // If reason was cancel, or system time change flag is not on, then we

    // can return.

     if (envChange == KErrCancel || !(envChange & EChangesSystemTime))

        {

        return;

        }

    // If system time really changed, then we set last fix time as 0

    iRequestManager.SystemTimeChange();

    TRACESTRING("CBTGPSEnvChangeHandler::HandleEnvironmentChange end")

    }

//  End of File