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-rw-r--r--examples/effects/lighting/shadoweffect.cpp76
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diff --git a/examples/effects/lighting/shadoweffect.cpp b/examples/effects/lighting/shadoweffect.cpp
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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 "shadoweffect.h"
-
-#include <math.h>
-
-ShadowEffect::ShadowEffect(QGraphicsItem *item, QGraphicsItem *source)
- : QGraphicsDropShadowEffect()
- , item(item), m_lightSource(source)
-{
- setBlurRadius(8);
- m_color = color();
-}
-
-void ShadowEffect::adjustForItem()
-{
- QPointF delta = item->pos() - m_lightSource->pos();
- setOffset(delta.toPoint() / 30);
-
- qreal dx = delta.x();
- qreal dy = delta.y();
- qreal dd = sqrt(dx * dx + dy * dy);
- m_color.setAlphaF(qBound(0.4, 1 - dd / 200.0, 0.7));
- setColor(m_color);
-}
-
-QRectF ShadowEffect::boundingRectFor(const QRectF &rect) const
-{
- const_cast<ShadowEffect *>(this)->adjustForItem();
- return QGraphicsDropShadowEffect::boundingRectFor(rect);
-}
-
-void ShadowEffect::draw(QPainter *painter, QGraphicsEffectSource *source)
-{
- adjustForItem();
- QGraphicsDropShadowEffect::draw(painter, source);
-}