Cleanup examples/effects/lighting.

There's no need to re-implement QGraphicsDropShadowEffect anymore.

5 files changed, 21 insertions, 149 deletions

diff --git a/examples/effects/lighting/lighting.cpp b/examples/effects/lighting/lighting.cpp
index 2294b36..e309e2e 100644
--- a/examples/effects/lighting/lighting.cpp
+++ b/examples/effects/lighting/lighting.cpp
@@ -43,8 +43,6 @@
 
 #include <QtGui>
 
-#include "shadoweffect.h"
-
 #ifndef M_PI
 #define M_PI 3.14159265358979323846
 #endif
@@ -98,7 +96,7 @@ void Lighting::setupScene()
 
             item->setPen(QPen(Qt::black));
             item->setBrush(QBrush(Qt::white));
-            item->setGraphicsEffect(new ShadowEffect(item, m_lightSource));
+            item->setGraphicsEffect(new QGraphicsDropShadowEffect);
             item->setZValue(1);
             item->setPos(i * 80, j * 80);
             m_scene.addItem(item);
@@ -114,6 +112,24 @@ void Lighting::animate()
     qreal xs = 200 * sin(angle) - 40 + 25;
     qreal ys = 200 * cos(angle) - 40 + 25;
     m_lightSource->setPos(xs, ys);
+
+    for (int i = 0; i < m_items.size(); ++i) {
+        QGraphicsItem *item = m_items.at(i);
+        Q_ASSERT(item);
+        QGraphicsDropShadowEffect *effect = static_cast<QGraphicsDropShadowEffect *>(item->graphicsEffect());
+        Q_ASSERT(effect);
+
+        QPointF delta(item->x() - xs, item->y() - ys);
+        effect->setOffset(delta.toPoint() / 30);
+
+        qreal dx = delta.x();
+        qreal dy = delta.y();
+        qreal dd = sqrt(dx * dx + dy * dy);
+        QColor color = effect->color();
+        color.setAlphaF(qBound(0.4, 1 - dd / 200.0, 0.7));
+        effect->setColor(color);
+    }
+
     m_scene.update();
 }
 
diff --git a/examples/effects/lighting/lighting.h b/examples/effects/lighting/lighting.h
index 3e12fdf..eef5cae 100644
--- a/examples/effects/lighting/lighting.h
+++ b/examples/effects/lighting/lighting.h
@@ -45,8 +45,6 @@
 #include <QGraphicsEffect>
 #include <QGraphicsView>
 
-#include "shadoweffect.h"
-
 class Lighting: public QGraphicsView
 {
     Q_OBJECT
diff --git a/examples/effects/lighting/lighting.pro b/examples/effects/lighting/lighting.pro
index ea9d5f6..432d1b5 100644
--- a/examples/effects/lighting/lighting.pro
+++ b/examples/effects/lighting/lighting.pro
@@ -1,5 +1,5 @@
-SOURCES += main.cpp lighting.cpp shadoweffect.cpp
-HEADERS += lighting.h shadoweffect.h
+SOURCES += main.cpp lighting.cpp
+HEADERS += lighting.h
 
 # install
 target.path = $$[QT_INSTALL_EXAMPLES]/effects/lighting
diff --git a/examples/effects/lighting/shadoweffect.cpp b/examples/effects/lighting/shadoweffect.cpp
deleted file mode 100644
index 16e52fb..0000000
--- a/examples/effects/lighting/shadoweffect.cpp
+++ /dev/null
@@ -1,76 +0,0 @@
-/****************************************************************************
-**
-** 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);
-}
diff --git a/examples/effects/lighting/shadoweffect.h b/examples/effects/lighting/shadoweffect.h
deleted file mode 100644
index 64314e5..0000000
--- a/examples/effects/lighting/shadoweffect.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/****************************************************************************
-**
-** 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.
-**
-**
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef SHADOWEFFECT_H
-#define SHADOWEFFECT_H
-
-#include <QGraphicsEffect>
-#include <QGraphicsItem>
-
-class ShadowEffect: public QGraphicsDropShadowEffect
-{
-public:
-    ShadowEffect(QGraphicsItem *item, QGraphicsItem *source);
-
-    QRectF boundingRectFor(const QRectF &rect) const;
-
-    void draw(QPainter *painter, QGraphicsEffectSource *source);
-
-private:
-    void adjustForItem();
-
-private:
-    QColor m_color;
-    QGraphicsItem *item;
-    QGraphicsItem *m_lightSource;
-};
-
-#endif // SHADOWEFFECT_H