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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "blureffect.h"
#include <QDebug>
BlurEffect::BlurEffect(QGraphicsItem *item)
: QGraphicsBlurEffect()
, m_baseLine(200), item(item)
{
}
void BlurEffect::adjustForItem()
{
qreal y = m_baseLine - item->pos().y();
qreal radius = qBound(qreal(0.0), y / 32, qreal(16.0));
setBlurRadius(radius);
}
QRectF BlurEffect::boundingRect() const
{
const_cast<BlurEffect *>(this)->adjustForItem();
return QGraphicsBlurEffect::boundingRect();
}
void BlurEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
{
adjustForItem();
QGraphicsBlurEffect::draw(painter, source);
}
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