homescreenapp/serviceproviders/hsmenuserviceprovider/src/hsiconsidleloader.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 02 Sep 2010 20:17:27 +0300
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permissions -rw-r--r--
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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: Menu All Applications state.
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 *
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 */
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#include <QPainter>
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#include <QSize>
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#include <QTimer>
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#include "hsmenuitemmodel.h"
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#include "hsiconsidleloader.h"
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/*!
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 Constructor
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 \param model with defined icons
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 \param pointer to parent object
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 */
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HsIconsIdleLoader::HsIconsIdleLoader(HsMenuItemModel *model, QObject *parent):
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    QObject(parent),
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    mModel(model),
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    mTimer(NULL),
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    mIconSize(mModel->getIconSize())
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{
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    mTimer = new QTimer(this);
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    mOutStandingIconToLoad = mModel->rowCount();
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    connect(mTimer, SIGNAL(timeout()), this, SLOT(processWhenIdle()));
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    mTimer->start(0); // NOTE: zero for idle
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}
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/*!
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 Destructor
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 */
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HsIconsIdleLoader::~HsIconsIdleLoader()
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{
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    mTimer->stop();
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}
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/*!
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 Preloading icons if idle
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 \retval void
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 */
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void HsIconsIdleLoader::processWhenIdle()
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{
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    if (mOutStandingIconToLoad >= 1 
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        && mModel->rowCount() >= mOutStandingIconToLoad ) {
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    	QPixmap pixmap(mIconSize.toSize());
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    	pixmap.fill(Qt::transparent);
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        QModelIndex idx = mModel->index(mOutStandingIconToLoad -1);
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        HbIcon icon = mModel->entry(idx)->makeIcon(mIconSize);
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        icon.setSize(mIconSize);
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        // creating raster data
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        QPainter painter;
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        painter.begin(&pixmap);
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        icon.paint(&painter, QRectF(QPointF(), mIconSize), 
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                     Qt::KeepAspectRatio, 
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                     Qt::AlignCenter, 
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                     QIcon::Normal, 
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                     QIcon::Off);
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        painter.end();
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        --mOutStandingIconToLoad;
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    } else {
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    	mTimer->stop(); // No more timing
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	}
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}
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