/*

* Copyright (c) 2004-2007 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: Observer for FMRadio property values  

*

*/

#include "fmradiopropertyobserver.h"

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

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

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

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

//

CFMRadioPropertyObserver::CFMRadioPropertyObserver(MFMRadioPropertyChangeObserver& aObserver, const TUid& aCategory, const TUint aKey, const TFMRadioPropertyType aPropertyType)

    : CActive( CActive::EPriorityStandard ),

    iObserver( aObserver ),

    iCategory( aCategory ),

    iKey( aKey ),

    iPropertyType( aPropertyType )

	{

	}

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

// Symbian 2nd phase constructor can leave.

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

//

void CFMRadioPropertyObserver::ConstructL()

	{

    switch (iPropertyType)

        {

        case EFMRadioPropertyInt:

	        {

	        break;

	        }

	    case EFMRadioPropertyByteArray:

	        {

	        iValueByteArray = HBufC8::NewL( RProperty::KMaxPropertySize );

	        break;

	        }

	    case EFMRadioPropertyText:

	        {

	        // Max size in bytes, length is size / 2

	        iValueText = HBufC::NewL( RProperty::KMaxPropertySize / 2 );

	        break;

	        }

	    default:

	        {

	        break;

	        }

        }

    User::LeaveIfError( iProperty.Attach( iCategory, iKey ) );

    CActiveScheduler::Add( this );

	}

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

// Two-phased constructor.

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

//

CFMRadioPropertyObserver* CFMRadioPropertyObserver::NewL( MFMRadioPropertyChangeObserver& aObserver,

                                                          const TUid& aCategory,

                                                          const TUint aKey,

                                                          const TFMRadioPropertyType aPropertyType )

    {

    CFMRadioPropertyObserver* self = NewLC( aObserver,

                                            aCategory,

                                            aKey,

                                            aPropertyType );

    CleanupStack::Pop( self );

    return self;

    }

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

// Two-phased constructor.

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

//

CFMRadioPropertyObserver* CFMRadioPropertyObserver::NewLC( MFMRadioPropertyChangeObserver& aObserver,

														  const TUid& aCategory,

														  const TUint aKey,

														  const TFMRadioPropertyType aPropertyType )

	{

    CFMRadioPropertyObserver* self = new( ELeave )CFMRadioPropertyObserver( aObserver,

    																   		aCategory,

    																   		aKey,

    																   		aPropertyType );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

	}

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

// Destructor

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

//

CFMRadioPropertyObserver::~CFMRadioPropertyObserver()

	{

	Cancel();

    iProperty.Close();

    delete iValueByteArray;

    delete iValueText;

	}

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

// Subscribes to a property and reads the value, if not already active.

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

//

void CFMRadioPropertyObserver::ActivateL()

	{

    if ( !IsActive() )

        {

        RunL();

        }

	}

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

// CFMRadioPropertyObserver::RunL

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

//

void CFMRadioPropertyObserver::RunL()

	{	

    iProperty.Subscribe( iStatus );

    SetActive();

    TInt err(KErrNone);

    switch (iPropertyType)

        {

        case EFMRadioPropertyInt:

	        {

	        err = iProperty.Get( iValueInt );

	        if (!err)

            	{

                iObserver.HandlePropertyChangeL( iCategory, iKey, iValueInt );

             	}

	        break;

	        }

		case EFMRadioPropertyByteArray:

	        {

	        TPtr8 ptr8( iValueByteArray->Des() );

	        err = iProperty.Get( ptr8 );

	        if (!err)

            	{

                iObserver.HandlePropertyChangeL( iCategory, iKey, *iValueByteArray );

             	}

	        break;		        

	        }

		case EFMRadioPropertyText:

	        {

	        TPtr ptr( iValueText->Des() );

	        err = iProperty.Get( ptr );

	        if (!err)

            	{

                iObserver.HandlePropertyChangeL( iCategory, iKey, *iValueText );

             	}

	        break;			        

	        }

	    default:

	        {

	        break;

	        }

        }

    if (err)

    	{

        iObserver.HandlePropertyChangeErrorL(iCategory, iKey, err);

     	}

	}

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

// Cancels an outstanding active request

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

//

void CFMRadioPropertyObserver::DoCancel()

	{

    iProperty.Cancel();

	}

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

// Getter for integer value

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

//	

TInt CFMRadioPropertyObserver::ValueInt( TBool aUpdate )

	{

	if( aUpdate )

	    {

	    iProperty.Get( iValueInt );

	    }

	return iValueInt;

	}

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

// Getter for byte array value

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

//	

const TDesC8& CFMRadioPropertyObserver::ValueDes8( TBool aUpdate )

	{

   if( aUpdate )

        {

    	TPtr8 ptr8( iValueByteArray->Des() );

    	iProperty.Get( ptr8 );

        }

	return *iValueByteArray;

	}

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

// Getter for text value

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

//	

const TDesC& CFMRadioPropertyObserver::ValueDes( TBool aUpdate )

	{

   if( aUpdate )

        {

    	TPtr ptr( iValueText->Des() );

    	iProperty.Get( ptr );

        }

	return *iValueText;

	}