/*

* 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: 

*

*/

/*

 * HgImageFader.cpp

 *

 *  Created on: Feb 10, 2010

 *      Author: anpentti

 */

#include "HgImageFader.h"

#include "hgimage.h"

HgImageFader::HgImageFader()

{

    QObject::connect(&mTimer, SIGNAL(timeout()), this, SLOT(doFading()));

}

HgImageFader::~HgImageFader()

{

    if (mTimer.isActive())

        mTimer.stop();

}

void HgImageFader::addImage(HgImage* image)

{

    mImages.push_back(image);

}

void HgImageFader::removeImage(HgImage* image)

{

    mImages.removeOne(image);

}

void HgImageFader::fadeImages()

{

    if (!mImages.empty() && !mTimer.isActive())

    {

        mTimer.start(10);

    }

}

void HgImageFader::doFading()

{

    QLinkedList<HgImage*>::iterator i = mImages.begin();

    while (i != mImages.end())

    {

        HgImage* image = (*i);

        image->setAlpha(image->alpha() + 0.1f);

        if (image->alpha() >= 1.0f)

        {

            image->setAlpha(1.0f);

            i = mImages.erase(i);

        }

        else

        {

            i++;

        }

    }

    //emit doUpdate();

    if (mImages.empty())

    {

        mTimer.stop();

    }

}