/*

* Copyright (c) 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:  This implements TUsbIndicatorHandler class.

*

*/

#include <e32std.h>

#include <AknNotifySignature.h> // SAknNotifierPackage

#include <avkon.hrh> //EAknIndicatorUSBConnection

#include "tusbindicatorhandler.h"

#include "debug.h"

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

// C++ Constructor 

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

//

TUsbIndicatorHandler::TUsbIndicatorHandler() 

    : iDevStateB4Suspend( EUsbDeviceStateUndefined )

    , iUsbIndicator(EFalse)

    {

    }

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

// Change USB Indicator 

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

//

void TUsbIndicatorHandler::HandleDeviceStateChange( TUsbDeviceState aStateOld, 

            TUsbDeviceState aStateNew )

    {

    LOG_FUNC

    LOG2( "USB device state changed: %d ==> %d", aStateOld, aStateNew );

    if ( EUsbDeviceStateConfigured == aStateNew ) // Entering configed state 

        {

        // filter out case of configed -> suspended -> configed

        if ( ( EUsbDeviceStateSuspended != aStateOld ) || 

             ( EUsbDeviceStateConfigured != iDevStateB4Suspend) )

            {

            ShowUsbIndicator( ETrue );

            }

        }

    else if ( EUsbDeviceStateSuspended == aStateNew )

    // If current state is suspend, we do not change the indicator, but save

    // the previous state

        {

        iDevStateB4Suspend = aStateOld;

        }

    else // New device state is not configured, nor suspended

        {

        // Hide USB indicator if previous state is either configured, or

        // suspended AND state before is not configured

        if( ( EUsbDeviceStateConfigured == aStateOld ) ||

            ( ( EUsbDeviceStateSuspended == aStateOld ) &&

              ( EUsbDeviceStateConfigured == iDevStateB4Suspend ) ) ) 

            {

            ShowUsbIndicator( EFalse );

            }

        } 

    }

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

// Show USB Indicator

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

//

void TUsbIndicatorHandler::ShowUsbIndicator( TInt aUsbIndicatorState )

    {

    LOG_FUNC

    iUsbIndicator = aUsbIndicatorState;

    LOG1( "USB indicator state %d", aUsbIndicatorState );

    RNotifier notifier;

    TInt err = notifier.Connect();

    if ( KErrNone == err )

        {

        TPckgBuf< SAknNotifierPackage<SAknSmallIndicatorParams> > pckg;

        pckg().iParamData.iSmallIndicatorUid =

            TUid::Uid( EAknIndicatorUSBConnection );

        pckg().iParamData.iValue = aUsbIndicatorState ? 

            EAknIndicatorStateOn : EAknIndicatorStateOff ;

        notifier.StartNotifier( KAknSmallIndicatorUid, pckg );

        notifier.Close();

        }

    else

        {

        LOG1( "RNotifier::Connect error: %d", err );

        }

    }

// End of file