/*

* 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:

*

*/

// System includes

#include <qtimer>

// User includes

#include "radiofrequencyscanninghandler.h"

#include "radioenginewrapper_p.h"

#include "cradioenginehandler.h"

#include "radiostationhandlerif.h"

/*!

 *

 */

RadioFrequencyScanningHandler::RadioFrequencyScanningHandler( RadioEngineWrapperPrivate& radioEngine ) :

    QObject( 0 ),

    mEngine( radioEngine ),

    mLastFoundFrequency( 0 )

{

}

/*!

 * From MRadioScanObserver

 *

 */

void RadioFrequencyScanningHandler::ScanFrequencyEventL( TUint32 aFrequency )

{

    // The scanning logic starts from the minimun frequency and advances as long as

    // the found frequency is higher than the last one. When it loops around from the highest

    // frequency back to the lowest one we check if it stops at the minimun frequency and

    // add the station there. This logic handles the special case where there is a station in the

    // minimum frequency, but does not work if there are no stations at all. The adaptation has a

    // timeout timer that stops the scanning if nothing is found and reports the scanning start

    // frequency which is this case will be the minimum frequency. In that case this logic will

    // assume that it was an audible station and adds it.

    uint frequency = static_cast<uint>( aFrequency );

    mEngine.mStationHandler.setCurrentStation( frequency );

    if ( frequency > mLastFoundFrequency ) {

        mLastFoundFrequency = frequency;

        addFoundStation( frequency );

    } else if ( frequency == mEngine.mEngineHandler->MinFrequency() ) {

        // Special case. A station has been found in the mininmum frequency

        addFoundStation( frequency );

    }

}

/*!

 * From MRadioScanObserver

 *

 */

void RadioFrequencyScanningHandler::ScanCompletedEventL( TInt aError )

{

    Q_UNUSED( aError )

    mEngine.frequencyScannerFinished(); // Causes the scanner to be deleted so nothing can be done after this

}

/*!

 * Starts the scanning

 */

void RadioFrequencyScanningHandler::startScanning( bool muted )

{

    cancel();

    QTimer::singleShot( 1000, this, SLOT(delayedStart()) );

}

/*!

 * Adds a new station that was found

 */

void RadioFrequencyScanningHandler::addFoundStation( const uint frequency )

{

    mEngine.mStationHandler.addScannedFrequency( frequency );

}

/*!

 * Cancels the scanning process

 */

void RadioFrequencyScanningHandler::cancel()

{

    mEngine.mEngineHandler->StopScan();

}

/*!

 *

 */

void RadioFrequencyScanningHandler::delayedStart()

{

    mEngine.mStationHandler.removeLocalStations();

    mLastFoundFrequency = mEngine.mEngineHandler->MinFrequency();

    mEngine.mEngineHandler->StartScan( *this );

}