1 files changed, 8 insertions, 7 deletions
diff --git a/examples/widgets/effects/lighting/lighting.cpp b/examples/widgets/effects/lighting/lighting.cpp
index 0c83dfc016..67bcb8147b 100644
--- a/examples/widgets/effects/lighting/lighting.cpp
+++ b/examples/widgets/effects/lighting/lighting.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
@@ -17,8 +17,8 @@
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
-**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
-**     of its contributors may be used to endorse or promote products derived
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
@@ -41,6 +41,7 @@
 #include "lighting.h"
 
 #include <QtWidgets>
+#include <QtCore/qmath.h>
 
 #ifndef M_PI
 #define M_PI 3.14159265358979323846
@@ -110,8 +111,8 @@ void Lighting::setupScene()
 void Lighting::animate()
 {
     angle += (M_PI / 30);
-    qreal xs = 200 * sin(angle) - 40 + 25;
-    qreal ys = 200 * cos(angle) - 40 + 25;
+    qreal xs = 200 * qSin(angle) - 40 + 25;
+    qreal ys = 200 * qCos(angle) - 40 + 25;
     m_lightSource->setPos(xs, ys);
 
     for (int i = 0; i < m_items.size(); ++i) {
@@ -125,7 +126,7 @@ void Lighting::animate()
 
         qreal dx = delta.x();
         qreal dy = delta.y();
-        qreal dd = sqrt(dx * dx + dy * dy);
+        qreal dd = qSqrt(dx * dx + dy * dy);
         QColor color = effect->color();
         color.setAlphaF(qBound(0.4, 1 - dd / 200.0, 0.7));
         effect->setColor(color);