8 files changed, 8 insertions, 8 deletions
diff --git a/src/datavisualization/engine/q3dbars.h b/src/datavisualization/engine/q3dbars.h
index 3f5ebbd6..4ecb1953 100644
--- a/src/datavisualization/engine/q3dbars.h
+++ b/src/datavisualization/engine/q3dbars.h
@@ -54,7 +54,7 @@ class QT_DATAVISUALIZATION_EXPORT Q3DBars : public QAbstract3DGraph
     Q_PROPERTY(float floorLevel READ floorLevel WRITE setFloorLevel NOTIFY floorLevelChanged)
 
 public:
-    explicit Q3DBars(const QSurfaceFormat *format = 0, QWindow *parent = 0);
+    explicit Q3DBars(const QSurfaceFormat *format = Q_NULLPTR, QWindow *parent = Q_NULLPTR);
     virtual ~Q3DBars();
 
     void setPrimarySeries(QBar3DSeries *series);
diff --git a/src/datavisualization/engine/q3dcamera.h b/src/datavisualization/engine/q3dcamera.h
index 5799ca30..b592d4cc 100644
--- a/src/datavisualization/engine/q3dcamera.h
+++ b/src/datavisualization/engine/q3dcamera.h
@@ -79,7 +79,7 @@ public:
         CameraPresetDirectlyBelow
     };
 
-    Q3DCamera(QObject *parent = 0);
+    explicit Q3DCamera(QObject *parent = Q_NULLPTR);
     virtual ~Q3DCamera();
 
     float xRotation() const;
diff --git a/src/datavisualization/engine/q3dlight.h b/src/datavisualization/engine/q3dlight.h
index c02597de..8dc59d3a 100644
--- a/src/datavisualization/engine/q3dlight.h
+++ b/src/datavisualization/engine/q3dlight.h
@@ -41,7 +41,7 @@ class QT_DATAVISUALIZATION_EXPORT Q3DLight : public Q3DObject
     Q_OBJECT
 
 public:
-    Q3DLight(QObject *parent = 0);
+    explicit Q3DLight(QObject *parent = Q_NULLPTR);
     virtual ~Q3DLight();
 
 private:
diff --git a/src/datavisualization/engine/q3dobject.h b/src/datavisualization/engine/q3dobject.h
index 5f121632..c6faef5a 100644
--- a/src/datavisualization/engine/q3dobject.h
+++ b/src/datavisualization/engine/q3dobject.h
@@ -46,7 +46,7 @@ class QT_DATAVISUALIZATION_EXPORT Q3DObject : public QObject
     Q_PROPERTY(QVector3D position READ position WRITE setPosition NOTIFY positionChanged)
 
 public:
-    Q3DObject(QObject *parent = 0);
+    explicit Q3DObject(QObject *parent = Q_NULLPTR);
     virtual ~Q3DObject();
 
     virtual void copyValuesFrom(const Q3DObject &source);
diff --git a/src/datavisualization/engine/q3dscatter.h b/src/datavisualization/engine/q3dscatter.h
index 6d9f1f76..ef1561ea 100644
--- a/src/datavisualization/engine/q3dscatter.h
+++ b/src/datavisualization/engine/q3dscatter.h
@@ -47,7 +47,7 @@ class QT_DATAVISUALIZATION_EXPORT Q3DScatter : public QAbstract3DGraph
     Q_PROPERTY(QScatter3DSeries *selectedSeries READ selectedSeries NOTIFY selectedSeriesChanged)
 
 public:
-    explicit Q3DScatter(const QSurfaceFormat *format = 0, QWindow *parent = 0);
+    explicit Q3DScatter(const QSurfaceFormat *format = Q_NULLPTR, QWindow *parent = Q_NULLPTR);
     virtual ~Q3DScatter();
 
     void addSeries(QScatter3DSeries *series);
diff --git a/src/datavisualization/engine/q3dscene.h b/src/datavisualization/engine/q3dscene.h
index 4202c5bc..74c24c7c 100644
--- a/src/datavisualization/engine/q3dscene.h
+++ b/src/datavisualization/engine/q3dscene.h
@@ -55,7 +55,7 @@ class QT_DATAVISUALIZATION_EXPORT Q3DScene : public QObject
     Q_PROPERTY(QPoint graphPositionQuery READ graphPositionQuery WRITE setGraphPositionQuery NOTIFY graphPositionQueryChanged REVISION 1)
 
 public:
-    Q3DScene(QObject *parent = 0);
+    explicit Q3DScene(QObject *parent = Q_NULLPTR);
     virtual ~Q3DScene();
 
     QRect viewport() const;
diff --git a/src/datavisualization/engine/q3dsurface.h b/src/datavisualization/engine/q3dsurface.h
index c5fe6d83..4935f595 100644
--- a/src/datavisualization/engine/q3dsurface.h
+++ b/src/datavisualization/engine/q3dsurface.h
@@ -48,7 +48,7 @@ class QT_DATAVISUALIZATION_EXPORT Q3DSurface : public QAbstract3DGraph
     Q_PROPERTY(bool flipHorizontalGrid READ flipHorizontalGrid WRITE setFlipHorizontalGrid NOTIFY flipHorizontalGridChanged)
 
 public:
-    explicit Q3DSurface(const QSurfaceFormat *format = 0, QWindow *parent = 0);
+    explicit Q3DSurface(const QSurfaceFormat *format = Q_NULLPTR, QWindow *parent = Q_NULLPTR);
     virtual ~Q3DSurface();
 
     void addSeries(QSurface3DSeries *series);
diff --git a/src/datavisualization/engine/qabstract3dgraph.h b/src/datavisualization/engine/qabstract3dgraph.h
index eacdf948..87c93f5f 100644
--- a/src/datavisualization/engine/qabstract3dgraph.h
+++ b/src/datavisualization/engine/qabstract3dgraph.h
@@ -73,7 +73,7 @@ class QT_DATAVISUALIZATION_EXPORT QAbstract3DGraph : public QWindow, protected Q
 
 protected:
     explicit QAbstract3DGraph(QAbstract3DGraphPrivate *d, const QSurfaceFormat *format,
-                              QWindow *parent = 0);
+                              QWindow *parent = Q_NULLPTR);
 
 public:
     enum SelectionFlag {