/*

* Copyright (c) 2007-2008 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:    Slideshow specific thumbnail context

 *

*/

// INCLUDES

#include "shwthumbnailcontext.h"

#include <glxthumbnailinfo.h>

#include <glxthumbnailattributeinfo.h>

#include <glxerrormanager.h>

#include <mglxmedialist.h>

#include <glxlog.h>

#include <glxtracer.h>

// DEPENDENCIES

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

// Constructor.

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

inline CShwThumbnailContext::CShwThumbnailContext(TInt aIndex, TSize aSize,

        MGlxMediaList& aList) :

    iSize(aSize), iCurrentIndex(aIndex), iList(aList)

    {

    }

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

// NewLC.

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

CShwThumbnailContext* CShwThumbnailContext::NewLC(TInt aIndex, TSize aSize,

        MGlxMediaList& aList)

    {

    TRACER("CShwThumbnailContext::NewLC");

    GLX_LOG_INFO1( "CShwThumbnailContext::NewL, aIndex=%d", aIndex );

    CShwThumbnailContext* self =

        new (ELeave) CShwThumbnailContext( aIndex, aSize, aList );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

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

// ConstructL.

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

void CShwThumbnailContext::ConstructL()

    {

    TRACER("CShwThumbnailContext::ConstructL");

    // Create the high quality / slower context

    iHighQualityContext = CGlxThumbnailContext::NewL( this );

    // Call both setdefault and add

    iHighQualityContext->SetDefaultSpec( iSize.iWidth, iSize.iHeight );

    iHighQualityContext->AddSpecForItemL( iSize.iWidth, iSize.iHeight,

        iCurrentIndex );

    // we want to only load high quality with this context

    iHighQualityContext->SetHighQualityOnly( ETrue );

    }

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

// Destructor.

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

CShwThumbnailContext::~CShwThumbnailContext()

    {

    TRACER("CShwThumbnailContext::~CShwThumbnailContext");

    delete iHighQualityContext;

    }

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

// SetToFirst.

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

void CShwThumbnailContext::SetToFirst( const MGlxMediaList* /*aList*/ )

    {

    TRACER("CShwThumbnailContext::SetToFirst");

    // reset iterator state

    iIterated = EFalse;

    }

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

// CShwThumbnailLoaderImpl::operator++.

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

TInt CShwThumbnailContext::operator++( TInt )

    {

    TRACER("CShwThumbnailContext::operator++");

    // we want to load all the thumbnails our clients have requested 

    // notification on, nothing else

    // by default tell the thumbnail that we dont have any interesting indexes

    TInt wantedIndex = KErrNotFound;

    TInt count = iList.Count();

    // check if we were asked already and guard conditions

    if( !iIterated && (count > 0) && (iCurrentIndex < count))

        {        

        wantedIndex = iCurrentIndex;

        iIterated = ETrue;

        }

    // finally return the index that was wanted

    GLX_LOG_INFO1("CShwThumbnailContext::operator++ wantedIndex %d",wantedIndex);

    return wantedIndex;

    }

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

// InRange.

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

TBool CShwThumbnailContext::InRange( TInt aIndex ) const

    {

    TRACER("CShwThumbnailContext::InRange");

    // if we got notifications

    if ( aIndex == iCurrentIndex )

        {

        // is in range so dont remove the item :)

        // cache removes thumbnails that are no longer in range

        return ETrue;

        }

    // not in our range

    return EFalse;

    }

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

// RequestCountL.

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

TInt CShwThumbnailContext::RequestCountL(const MGlxMediaList* aList) const

    {

    TRACER("CShwThumbnailContext::RequestCountL");

    return iHighQualityContext->RequestCountL( aList );

    }

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

// Index.

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

TInt CShwThumbnailContext::Index()

    {

    TRACER("CShwThumbnailContext::Index");

    GLX_LOG_INFO1( "CShwThumbnailContext::Index %d", iCurrentIndex );

    return iCurrentIndex;

    }

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

// Context.

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

MGlxFetchContext* CShwThumbnailContext::Context()

	{

	TRACER("CShwThumbnailContext::Context");

	return iHighQualityContext;

	}