ganeswidgets/src/HgImageFader.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 19 Apr 2010 14:40:06 +0300
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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/*
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 * HgImageFader.cpp
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 *
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 *  Created on: Feb 10, 2010
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 *      Author: anpentti
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 */
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#include "HgImageFader.h"
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#include "hgimage.h"
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HgImageFader::HgImageFader()
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{
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    QObject::connect(&mTimer, SIGNAL(timeout()), this, SLOT(doFading()));
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}
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HgImageFader::~HgImageFader()
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{
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    if (mTimer.isActive())
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        mTimer.stop();
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}
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void HgImageFader::addImage(HgImage* image)
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{
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    mImages.push_back(image);
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}
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void HgImageFader::removeImage(HgImage* image)
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{
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    mImages.removeOne(image);
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}
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void HgImageFader::fadeImages()
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{
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    if (!mImages.empty() && !mTimer.isActive())
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    {
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        mTimer.start(10);
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    }
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}
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void HgImageFader::doFading()
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{
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    QLinkedList<HgImage*>::iterator i = mImages.begin();
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    while (i != mImages.end())
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    {
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        HgImage* image = (*i);
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        image->setAlpha(image->alpha() + 0.1f);
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        if (image->alpha() >= 1.0f)
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        {
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            image->setAlpha(1.0f);
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            i = mImages.erase(i);
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        }
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        else
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        {
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            i++;
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        }
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    }
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    //emit doUpdate();
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    if (mImages.empty())
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    {
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        mTimer.stop();
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    }
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}