diff --git a/src/charts/areachart/qareaseries.h b/src/charts/areachart/qareaseries.h
index ab75655..867ac4c 100644
--- a/src/charts/areachart/qareaseries.h
+++ b/src/charts/areachart/qareaseries.h
@@ -45,8 +45,8 @@ class QT_CHARTS_EXPORT QAreaSeries : public QAbstractSeries
     Q_PROPERTY(bool pointLabelsClipping READ pointLabelsClipping WRITE setPointLabelsClipping NOTIFY pointLabelsClippingChanged)
 
 public:
-    explicit QAreaSeries(QObject *parent = 0);
-    explicit QAreaSeries(QLineSeries *upperSeries, QLineSeries *lowerSeries = 0);
+    explicit QAreaSeries(QObject *parent = Q_NULLPTR);
+    explicit QAreaSeries(QLineSeries *upperSeries, QLineSeries *lowerSeries = Q_NULLPTR);
     ~QAreaSeries();
 
 public:
diff --git a/src/charts/axis/barcategoryaxis/qbarcategoryaxis.h b/src/charts/axis/barcategoryaxis/qbarcategoryaxis.h
index 4d0a241..ab0a993 100644
--- a/src/charts/axis/barcategoryaxis/qbarcategoryaxis.h
+++ b/src/charts/axis/barcategoryaxis/qbarcategoryaxis.h
@@ -37,11 +37,11 @@ class QT_CHARTS_EXPORT QBarCategoryAxis : public QAbstractAxis
     Q_PROPERTY(int count READ count NOTIFY countChanged)
 
 public:
-    explicit QBarCategoryAxis(QObject *parent = 0);
+    explicit QBarCategoryAxis(QObject *parent = Q_NULLPTR);
     ~QBarCategoryAxis();
 
 protected:
-    QBarCategoryAxis(QBarCategoryAxisPrivate &d, QObject *parent = 0);
+    QBarCategoryAxis(QBarCategoryAxisPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     AxisType type() const;
diff --git a/src/charts/axis/categoryaxis/qcategoryaxis.h b/src/charts/axis/categoryaxis/qcategoryaxis.h
index 9987e58..d1b42fa 100644
--- a/src/charts/axis/categoryaxis/qcategoryaxis.h
+++ b/src/charts/axis/categoryaxis/qcategoryaxis.h
@@ -45,11 +45,11 @@ public:
         AxisLabelsPositionOnValue = 0x1
     };
 
-    explicit QCategoryAxis(QObject *parent = 0);
+    explicit QCategoryAxis(QObject *parent = Q_NULLPTR);
     ~QCategoryAxis();
 
 protected:
-    QCategoryAxis(QCategoryAxisPrivate &d, QObject *parent = 0);
+    QCategoryAxis(QCategoryAxisPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     AxisType type() const;
diff --git a/src/charts/axis/datetimeaxis/qdatetimeaxis.h b/src/charts/axis/datetimeaxis/qdatetimeaxis.h
index e35e04b..c4d91e4 100644
--- a/src/charts/axis/datetimeaxis/qdatetimeaxis.h
+++ b/src/charts/axis/datetimeaxis/qdatetimeaxis.h
@@ -41,11 +41,11 @@ class QT_CHARTS_EXPORT QDateTimeAxis : public QAbstractAxis
     Q_PROPERTY(QString format READ format WRITE setFormat NOTIFY formatChanged)
 
 public:
-    explicit QDateTimeAxis(QObject *parent = 0);
+    explicit QDateTimeAxis(QObject *parent = Q_NULLPTR);
     ~QDateTimeAxis();
 
 protected:
-    QDateTimeAxis(QDateTimeAxisPrivate &d, QObject *parent = 0);
+    QDateTimeAxis(QDateTimeAxisPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     AxisType type() const;
diff --git a/src/charts/axis/logvalueaxis/qlogvalueaxis.h b/src/charts/axis/logvalueaxis/qlogvalueaxis.h
index 1bcff59..bd35c9f 100644
--- a/src/charts/axis/logvalueaxis/qlogvalueaxis.h
+++ b/src/charts/axis/logvalueaxis/qlogvalueaxis.h
@@ -41,11 +41,11 @@ class QT_CHARTS_EXPORT QLogValueAxis : public QAbstractAxis
     Q_PROPERTY(qreal base READ base WRITE setBase NOTIFY baseChanged)
 
 public:
-    explicit QLogValueAxis(QObject *parent = 0);
+    explicit QLogValueAxis(QObject *parent = Q_NULLPTR);
     ~QLogValueAxis();
 
 protected:
-    QLogValueAxis(QLogValueAxisPrivate &d, QObject *parent = 0);
+    QLogValueAxis(QLogValueAxisPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     AxisType type() const;
diff --git a/src/charts/axis/qabstractaxis.h b/src/charts/axis/qabstractaxis.h
index e89cd9f..df40bf7 100644
--- a/src/charts/axis/qabstractaxis.h
+++ b/src/charts/axis/qabstractaxis.h
@@ -84,7 +84,7 @@ public:
     Q_DECLARE_FLAGS(AxisTypes, AxisType)
 
 protected:
-    explicit QAbstractAxis(QAbstractAxisPrivate &d, QObject *parent = 0);
+    explicit QAbstractAxis(QAbstractAxisPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     ~QAbstractAxis();
diff --git a/src/charts/axis/valueaxis/qvalueaxis.h b/src/charts/axis/valueaxis/qvalueaxis.h
index 661facf..a961b2a 100644
--- a/src/charts/axis/valueaxis/qvalueaxis.h
+++ b/src/charts/axis/valueaxis/qvalueaxis.h
@@ -38,11 +38,11 @@ class QT_CHARTS_EXPORT QValueAxis : public QAbstractAxis
     Q_PROPERTY(int minorTickCount READ minorTickCount WRITE setMinorTickCount NOTIFY minorTickCountChanged)
 
 public:
-    explicit QValueAxis(QObject *parent = 0);
+    explicit QValueAxis(QObject *parent = Q_NULLPTR);
     ~QValueAxis();
 
 protected:
-    QValueAxis(QValueAxisPrivate &d, QObject *parent = 0);
+    QValueAxis(QValueAxisPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     AxisType type() const;
diff --git a/src/charts/barchart/horizontal/bar/qhorizontalbarseries.h b/src/charts/barchart/horizontal/bar/qhorizontalbarseries.h
index 14b0e9a..fabbd28 100644
--- a/src/charts/barchart/horizontal/bar/qhorizontalbarseries.h
+++ b/src/charts/barchart/horizontal/bar/qhorizontalbarseries.h
@@ -32,7 +32,7 @@ class QT_CHARTS_EXPORT QHorizontalBarSeries : public QAbstractBarSeries
 {
     Q_OBJECT
 public:
-    explicit QHorizontalBarSeries(QObject *parent = 0);
+    explicit QHorizontalBarSeries(QObject *parent = Q_NULLPTR);
     ~QHorizontalBarSeries();
     QAbstractSeries::SeriesType type() const;
 
diff --git a/src/charts/barchart/horizontal/percent/qhorizontalpercentbarseries.h b/src/charts/barchart/horizontal/percent/qhorizontalpercentbarseries.h
index e92ac3b..b6b7eab 100644
--- a/src/charts/barchart/horizontal/percent/qhorizontalpercentbarseries.h
+++ b/src/charts/barchart/horizontal/percent/qhorizontalpercentbarseries.h
@@ -32,7 +32,7 @@ class QT_CHARTS_EXPORT QHorizontalPercentBarSeries : public QAbstractBarSeries
 {
     Q_OBJECT
 public:
-    explicit QHorizontalPercentBarSeries(QObject *parent = 0);
+    explicit QHorizontalPercentBarSeries(QObject *parent = Q_NULLPTR);
     ~QHorizontalPercentBarSeries();
     QAbstractSeries::SeriesType type() const;
 
diff --git a/src/charts/barchart/horizontal/stacked/qhorizontalstackedbarseries.h b/src/charts/barchart/horizontal/stacked/qhorizontalstackedbarseries.h
index c70ddbc..7719ca5 100644
--- a/src/charts/barchart/horizontal/stacked/qhorizontalstackedbarseries.h
+++ b/src/charts/barchart/horizontal/stacked/qhorizontalstackedbarseries.h
@@ -32,7 +32,7 @@ class QT_CHARTS_EXPORT QHorizontalStackedBarSeries : public QAbstractBarSeries
 {
     Q_OBJECT
 public:
-    explicit QHorizontalStackedBarSeries(QObject *parent = 0);
+    explicit QHorizontalStackedBarSeries(QObject *parent = Q_NULLPTR);
     ~QHorizontalStackedBarSeries();
     QAbstractSeries::SeriesType type() const;
 
diff --git a/src/charts/barchart/qabstractbarseries.h b/src/charts/barchart/qabstractbarseries.h
index 6653787..c41527c 100644
--- a/src/charts/barchart/qabstractbarseries.h
+++ b/src/charts/barchart/qabstractbarseries.h
@@ -78,7 +78,7 @@ public:
     QAbstractBarSeries::LabelsPosition labelsPosition() const;
 
 protected:
-    explicit QAbstractBarSeries(QAbstractBarSeriesPrivate &d, QObject *parent = 0);
+    explicit QAbstractBarSeries(QAbstractBarSeriesPrivate &d, QObject *parent = Q_NULLPTR);
 
 Q_SIGNALS:
     void clicked(int index, QBarSet *barset);
diff --git a/src/charts/barchart/qbarmodelmapper.h b/src/charts/barchart/qbarmodelmapper.h
index a5ea44f..be82f8f 100644
--- a/src/charts/barchart/qbarmodelmapper.h
+++ b/src/charts/barchart/qbarmodelmapper.h
@@ -39,7 +39,7 @@ class QT_CHARTS_EXPORT QBarModelMapper : public QObject
     Q_OBJECT
 
 protected:
-    explicit QBarModelMapper(QObject *parent = 0);
+    explicit QBarModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/barchart/qbarset.h b/src/charts/barchart/qbarset.h
index ffd812d..81713d0 100644
--- a/src/charts/barchart/qbarset.h
+++ b/src/charts/barchart/qbarset.h
@@ -43,7 +43,7 @@ class QT_CHARTS_EXPORT QBarSet : public QObject
     Q_PROPERTY(QColor labelColor READ labelColor WRITE setLabelColor NOTIFY labelColorChanged)
 
 public:
-    explicit QBarSet(const QString label, QObject *parent = 0);
+    explicit QBarSet(const QString label, QObject *parent = Q_NULLPTR);
     virtual ~QBarSet();
 
     void setLabel(const QString label);
diff --git a/src/charts/barchart/qhbarmodelmapper.h b/src/charts/barchart/qhbarmodelmapper.h
index 1f83524..7044c5c 100644
--- a/src/charts/barchart/qhbarmodelmapper.h
+++ b/src/charts/barchart/qhbarmodelmapper.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QHBarModelMapper : public QBarModelMapper
     Q_PROPERTY(int columnCount READ columnCount WRITE setColumnCount NOTIFY columnCountChanged)
 
 public:
-    explicit QHBarModelMapper(QObject *parent = 0);
+    explicit QHBarModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/barchart/qvbarmodelmapper.h b/src/charts/barchart/qvbarmodelmapper.h
index d20c924..6af9d9b 100644
--- a/src/charts/barchart/qvbarmodelmapper.h
+++ b/src/charts/barchart/qvbarmodelmapper.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QVBarModelMapper : public QBarModelMapper
     Q_PROPERTY(int rowCount READ rowCount WRITE setRowCount NOTIFY rowCountChanged)
 
 public:
-    explicit QVBarModelMapper(QObject *parent = 0);
+    explicit QVBarModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/barchart/vertical/bar/qbarseries.h b/src/charts/barchart/vertical/bar/qbarseries.h
index 00abc12..f30ad33 100644
--- a/src/charts/barchart/vertical/bar/qbarseries.h
+++ b/src/charts/barchart/vertical/bar/qbarseries.h
@@ -32,7 +32,7 @@ class QT_CHARTS_EXPORT QBarSeries : public QAbstractBarSeries
 {
     Q_OBJECT
 public:
-    explicit QBarSeries(QObject *parent = 0);
+    explicit QBarSeries(QObject *parent = Q_NULLPTR);
     ~QBarSeries();
     QAbstractSeries::SeriesType type() const;
 
diff --git a/src/charts/barchart/vertical/percent/qpercentbarseries.h b/src/charts/barchart/vertical/percent/qpercentbarseries.h
index c987901..04507be 100644
--- a/src/charts/barchart/vertical/percent/qpercentbarseries.h
+++ b/src/charts/barchart/vertical/percent/qpercentbarseries.h
@@ -33,7 +33,7 @@ class QT_CHARTS_EXPORT QPercentBarSeries : public QAbstractBarSeries
 {
     Q_OBJECT
 public:
-    explicit QPercentBarSeries(QObject *parent = 0);
+    explicit QPercentBarSeries(QObject *parent = Q_NULLPTR);
     ~QPercentBarSeries();
     QAbstractSeries::SeriesType type() const;
 
diff --git a/src/charts/barchart/vertical/stacked/qstackedbarseries.h b/src/charts/barchart/vertical/stacked/qstackedbarseries.h
index 46a7fa0..5dba4b7 100644
--- a/src/charts/barchart/vertical/stacked/qstackedbarseries.h
+++ b/src/charts/barchart/vertical/stacked/qstackedbarseries.h
@@ -33,7 +33,7 @@ class QT_CHARTS_EXPORT QStackedBarSeries : public QAbstractBarSeries
 {
     Q_OBJECT
 public:
-    explicit QStackedBarSeries(QObject *parent = 0);
+    explicit QStackedBarSeries(QObject *parent = Q_NULLPTR);
     ~QStackedBarSeries();
     QAbstractSeries::SeriesType type() const;
 
diff --git a/src/charts/boxplotchart/qboxplotmodelmapper.h b/src/charts/boxplotchart/qboxplotmodelmapper.h
index d76d528..7eea95e 100644
--- a/src/charts/boxplotchart/qboxplotmodelmapper.h
+++ b/src/charts/boxplotchart/qboxplotmodelmapper.h
@@ -39,7 +39,7 @@ class QT_CHARTS_EXPORT QBoxPlotModelMapper : public QObject
     Q_OBJECT
 
 protected:
-    explicit QBoxPlotModelMapper(QObject *parent = 0);
+    explicit QBoxPlotModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/boxplotchart/qboxplotseries.h b/src/charts/boxplotchart/qboxplotseries.h
index 2e21e65..3087bc2 100644
--- a/src/charts/boxplotchart/qboxplotseries.h
+++ b/src/charts/boxplotchart/qboxplotseries.h
@@ -39,7 +39,7 @@ class QT_CHARTS_EXPORT QBoxPlotSeries : public QAbstractSeries
     Q_PROPERTY(QBrush brush READ brush WRITE setBrush NOTIFY brushChanged)
     Q_PROPERTY(int count READ count NOTIFY countChanged REVISION 1)
 public:
-    explicit QBoxPlotSeries(QObject *parent = 0);
+    explicit QBoxPlotSeries(QObject *parent = Q_NULLPTR);
     ~QBoxPlotSeries();
 
     bool append(QBoxSet *box);
diff --git a/src/charts/boxplotchart/qboxset.h b/src/charts/boxplotchart/qboxset.h
index 3025929..7d80923 100644
--- a/src/charts/boxplotchart/qboxset.h
+++ b/src/charts/boxplotchart/qboxset.h
@@ -46,8 +46,8 @@ public:
     };
 
 public:
-    explicit QBoxSet(const QString label = QString(), QObject *parent = 0);
-    explicit QBoxSet(const qreal le, const qreal lq, const qreal m, const qreal uq, const qreal ue, const QString label = QString(), QObject *parent = 0);
+    explicit QBoxSet(const QString label = QString(), QObject *parent = Q_NULLPTR);
+    explicit QBoxSet(const qreal le, const qreal lq, const qreal m, const qreal uq, const qreal ue, const QString label = QString(), QObject *parent = Q_NULLPTR);
     virtual ~QBoxSet();
 
     void append(const qreal value);
diff --git a/src/charts/boxplotchart/qvboxplotmodelmapper.h b/src/charts/boxplotchart/qvboxplotmodelmapper.h
index e3779f1..a392216 100644
--- a/src/charts/boxplotchart/qvboxplotmodelmapper.h
+++ b/src/charts/boxplotchart/qvboxplotmodelmapper.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QVBoxPlotModelMapper : public QBoxPlotModelMapper
     Q_PROPERTY(int rowCount READ rowCount WRITE setRowCount NOTIFY rowCountChanged)
 
 public:
-    explicit QVBoxPlotModelMapper(QObject *parent = 0);
+    explicit QVBoxPlotModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/legend/qarealegendmarker.h b/src/charts/legend/qarealegendmarker.h
index 7038689..1f0adc6 100644
--- a/src/charts/legend/qarealegendmarker.h
+++ b/src/charts/legend/qarealegendmarker.h
@@ -35,7 +35,7 @@ class QT_CHARTS_EXPORT QAreaLegendMarker : public QLegendMarker
     Q_OBJECT
 
 public:
-    explicit QAreaLegendMarker(QAreaSeries *series, QLegend *legend, QObject *parent = 0);
+    explicit QAreaLegendMarker(QAreaSeries *series, QLegend *legend, QObject *parent = Q_NULLPTR);
     virtual ~QAreaLegendMarker();
 
     virtual LegendMarkerType type() { return LegendMarkerTypeArea; }
@@ -44,7 +44,7 @@ public:
     virtual QAreaSeries* series();
 
 protected:
-    QAreaLegendMarker(QAreaLegendMarkerPrivate &d, QObject *parent = 0);
+    QAreaLegendMarker(QAreaLegendMarkerPrivate &d, QObject *parent = Q_NULLPTR);
 
 private:
     Q_DECLARE_PRIVATE(QAreaLegendMarker)
diff --git a/src/charts/legend/qbarlegendmarker.h b/src/charts/legend/qbarlegendmarker.h
index 02822df..3d8e022 100644
--- a/src/charts/legend/qbarlegendmarker.h
+++ b/src/charts/legend/qbarlegendmarker.h
@@ -35,7 +35,7 @@ class QT_CHARTS_EXPORT QBarLegendMarker : public QLegendMarker
 {
     Q_OBJECT
 public:
-    explicit QBarLegendMarker(QAbstractBarSeries *series, QBarSet *barset, QLegend *legend, QObject *parent = 0);
+    explicit QBarLegendMarker(QAbstractBarSeries *series, QBarSet *barset, QLegend *legend, QObject *parent = Q_NULLPTR);
     virtual ~QBarLegendMarker();
 
     virtual LegendMarkerType type() { return LegendMarkerTypeBar; }
@@ -45,7 +45,7 @@ public:
     QBarSet* barset();
 
 protected:
-    QBarLegendMarker(QBarLegendMarkerPrivate &d, QObject *parent = 0);
+    QBarLegendMarker(QBarLegendMarkerPrivate &d, QObject *parent = Q_NULLPTR);
 
 private:
     Q_DECLARE_PRIVATE(QBarLegendMarker)
diff --git a/src/charts/legend/qboxplotlegendmarker.h b/src/charts/legend/qboxplotlegendmarker.h
index d98a33e..9526479 100644
--- a/src/charts/legend/qboxplotlegendmarker.h
+++ b/src/charts/legend/qboxplotlegendmarker.h
@@ -35,7 +35,7 @@ class QT_CHARTS_EXPORT QBoxPlotLegendMarker : public QLegendMarker
     Q_OBJECT
 
 public:
-    explicit QBoxPlotLegendMarker(QBoxPlotSeries *series, QLegend *legend, QObject *parent = 0);
+    explicit QBoxPlotLegendMarker(QBoxPlotSeries *series, QLegend *legend, QObject *parent = Q_NULLPTR);
     virtual ~QBoxPlotLegendMarker();
 
     virtual LegendMarkerType type() { return LegendMarkerTypeBoxPlot; }
@@ -44,7 +44,7 @@ public:
     virtual QBoxPlotSeries* series();
 
 protected:
-    QBoxPlotLegendMarker(QBoxPlotLegendMarkerPrivate &d, QObject *parent = 0);
+    QBoxPlotLegendMarker(QBoxPlotLegendMarkerPrivate &d, QObject *parent = Q_NULLPTR);
 
 private:
     Q_DECLARE_PRIVATE(QBoxPlotLegendMarker)
diff --git a/src/charts/legend/qlegend.h b/src/charts/legend/qlegend.h
index ad1d0a7..7e35239 100644
--- a/src/charts/legend/qlegend.h
+++ b/src/charts/legend/qlegend.h
@@ -51,7 +51,7 @@ private:
 public:
     ~QLegend();
 
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = Q_NULLPTR);
 
     void setBrush(const QBrush &brush);
     QBrush brush() const;
@@ -81,7 +81,7 @@ public:
     void setBackgroundVisible(bool visible = true);
     bool isBackgroundVisible() const;
 
-    QList <QLegendMarker*> markers(QAbstractSeries *series = 0) const;
+    QList <QLegendMarker*> markers(QAbstractSeries *series = Q_NULLPTR) const;
 
     bool reverseMarkers();
     void setReverseMarkers(bool reverseMarkers = true);
diff --git a/src/charts/legend/qlegendmarker.h b/src/charts/legend/qlegendmarker.h
index 2f3b8cd..39c6caf 100644
--- a/src/charts/legend/qlegendmarker.h
+++ b/src/charts/legend/qlegendmarker.h
@@ -90,7 +90,7 @@ Q_SIGNALS:
     void visibleChanged();
 
 protected:
-    explicit QLegendMarker(QLegendMarkerPrivate &d, QObject *parent = 0);
+    explicit QLegendMarker(QLegendMarkerPrivate &d, QObject *parent = Q_NULLPTR);
 
     QScopedPointer<QLegendMarkerPrivate> d_ptr;
     friend class QLegendPrivate;
diff --git a/src/charts/legend/qpielegendmarker.h b/src/charts/legend/qpielegendmarker.h
index 20adaab..8127684 100644
--- a/src/charts/legend/qpielegendmarker.h
+++ b/src/charts/legend/qpielegendmarker.h
@@ -36,7 +36,7 @@ class QT_CHARTS_EXPORT QPieLegendMarker : public QLegendMarker
     Q_OBJECT
 
 public:
-    explicit QPieLegendMarker(QPieSeries *series, QPieSlice *slice, QLegend *legend, QObject *parent = 0);
+    explicit QPieLegendMarker(QPieSeries *series, QPieSlice *slice, QLegend *legend, QObject *parent = Q_NULLPTR);
     virtual ~QPieLegendMarker();
 
     virtual LegendMarkerType type() { return LegendMarkerTypePie; }
@@ -46,7 +46,7 @@ public:
     QPieSlice* slice();
 
 protected:
-    QPieLegendMarker(QPieLegendMarkerPrivate &d, QObject *parent = 0);
+    QPieLegendMarker(QPieLegendMarkerPrivate &d, QObject *parent = Q_NULLPTR);
 
 private:
     Q_DECLARE_PRIVATE(QPieLegendMarker)
diff --git a/src/charts/legend/qxylegendmarker.h b/src/charts/legend/qxylegendmarker.h
index 601ffca..3c879cb 100644
--- a/src/charts/legend/qxylegendmarker.h
+++ b/src/charts/legend/qxylegendmarker.h
@@ -34,7 +34,7 @@ class QT_CHARTS_EXPORT QXYLegendMarker : public QLegendMarker
 {
     Q_OBJECT
 public:
-    explicit QXYLegendMarker(QXYSeries *series, QLegend *legend, QObject *parent = 0);
+    explicit QXYLegendMarker(QXYSeries *series, QLegend *legend, QObject *parent = Q_NULLPTR);
     virtual ~QXYLegendMarker();
 
     virtual LegendMarkerType type() { return LegendMarkerTypeXY; }
@@ -43,7 +43,7 @@ public:
     virtual QXYSeries* series();
 
 protected:
-    QXYLegendMarker(QXYLegendMarkerPrivate &d, QObject *parent = 0);
+    QXYLegendMarker(QXYLegendMarkerPrivate &d, QObject *parent = Q_NULLPTR);
 
 private:
     Q_DECLARE_PRIVATE(QXYLegendMarker)
diff --git a/src/charts/linechart/qlineseries.h b/src/charts/linechart/qlineseries.h
index 66a756f..076207a 100644
--- a/src/charts/linechart/qlineseries.h
+++ b/src/charts/linechart/qlineseries.h
@@ -35,12 +35,12 @@ class QT_CHARTS_EXPORT QLineSeries : public QXYSeries
     Q_OBJECT
 
 public:
-    explicit QLineSeries(QObject *parent = 0);
+    explicit QLineSeries(QObject *parent = Q_NULLPTR);
     ~QLineSeries();
     QAbstractSeries::SeriesType type() const;
 
 protected:
-    QLineSeries(QLineSeriesPrivate &d, QObject *parent = 0);
+    QLineSeries(QLineSeriesPrivate &d, QObject *parent = Q_NULLPTR);
 
 private:
     Q_DECLARE_PRIVATE(QLineSeries)
diff --git a/src/charts/piechart/qhpiemodelmapper.h b/src/charts/piechart/qhpiemodelmapper.h
index fd79845..a0ad014 100644
--- a/src/charts/piechart/qhpiemodelmapper.h
+++ b/src/charts/piechart/qhpiemodelmapper.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QHPieModelMapper : public QPieModelMapper
     Q_PROPERTY(int columnCount READ columnCount WRITE setColumnCount NOTIFY columnCountChanged)
 
 public:
-    explicit QHPieModelMapper(QObject *parent = 0);
+    explicit QHPieModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/piechart/qpiemodelmapper.h b/src/charts/piechart/qpiemodelmapper.h
index 7d456b6..ed85cee 100644
--- a/src/charts/piechart/qpiemodelmapper.h
+++ b/src/charts/piechart/qpiemodelmapper.h
@@ -39,7 +39,7 @@ class QT_CHARTS_EXPORT QPieModelMapper : public QObject
     Q_OBJECT
 
 protected:
-    explicit QPieModelMapper(QObject *parent = 0);
+    explicit QPieModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/piechart/qpieseries.h b/src/charts/piechart/qpieseries.h
index 155e9ad..6f99cf7 100644
--- a/src/charts/piechart/qpieseries.h
+++ b/src/charts/piechart/qpieseries.h
@@ -41,7 +41,7 @@ class QT_CHARTS_EXPORT QPieSeries : public QAbstractSeries
     Q_PROPERTY(qreal holeSize READ holeSize WRITE setHoleSize)
 
 public:
-    explicit QPieSeries(QObject *parent = 0);
+    explicit QPieSeries(QObject *parent = Q_NULLPTR);
     virtual ~QPieSeries();
 
     QAbstractSeries::SeriesType type() const;
diff --git a/src/charts/piechart/qpieslice.h b/src/charts/piechart/qpieslice.h
index 2ac3b49..c7fd0af 100644
--- a/src/charts/piechart/qpieslice.h
+++ b/src/charts/piechart/qpieslice.h
@@ -64,8 +64,8 @@ public:
     };
 
 public:
-    explicit QPieSlice(QObject *parent = 0);
-    QPieSlice(QString label, qreal value, QObject *parent = 0);
+    explicit QPieSlice(QObject *parent = Q_NULLPTR);
+    QPieSlice(QString label, qreal value, QObject *parent = Q_NULLPTR);
     virtual ~QPieSlice();
 
     void setLabel(QString label);
diff --git a/src/charts/piechart/qvpiemodelmapper.h b/src/charts/piechart/qvpiemodelmapper.h
index a4eae98..0a10958 100644
--- a/src/charts/piechart/qvpiemodelmapper.h
+++ b/src/charts/piechart/qvpiemodelmapper.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QVPieModelMapper : public QPieModelMapper
     Q_PROPERTY(int rowCount READ rowCount WRITE setRowCount NOTIFY rowCountChanged)
 
 public:
-    explicit QVPieModelMapper(QObject *parent = 0);
+    explicit QVPieModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/qabstractseries.h b/src/charts/qabstractseries.h
index ab79416..acab398 100644
--- a/src/charts/qabstractseries.h
+++ b/src/charts/qabstractseries.h
@@ -59,7 +59,7 @@ public:
     };
 
 protected:
-    QAbstractSeries(QAbstractSeriesPrivate &d, QObject *parent = 0);
+    QAbstractSeries(QAbstractSeriesPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     ~QAbstractSeries();
diff --git a/src/charts/qchart.h b/src/charts/qchart.h
index c854271..216f9b9 100644
--- a/src/charts/qchart.h
+++ b/src/charts/qchart.h
@@ -88,7 +88,7 @@ public:
     Q_DECLARE_FLAGS(AnimationOptions, AnimationOption)
 
 public:
-    explicit QChart(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);
+    explicit QChart(QGraphicsItem *parent = Q_NULLPTR, Qt::WindowFlags wFlags = Qt::WindowFlags());
     ~QChart();
 
     void addSeries(QAbstractSeries *series);
@@ -97,15 +97,15 @@ public:
     QList<QAbstractSeries *> series() const;
 
     // *** deprecated ***
-    void setAxisX(QAbstractAxis *axis, QAbstractSeries *series = 0);
-    void setAxisY(QAbstractAxis *axis, QAbstractSeries *series = 0);
-    QAbstractAxis *axisX(QAbstractSeries *series = 0) const;
-    QAbstractAxis *axisY(QAbstractSeries *series = 0) const;
+    void setAxisX(QAbstractAxis *axis, QAbstractSeries *series = Q_NULLPTR);
+    void setAxisY(QAbstractAxis *axis, QAbstractSeries *series = Q_NULLPTR);
+    QAbstractAxis *axisX(QAbstractSeries *series = Q_NULLPTR) const;
+    QAbstractAxis *axisY(QAbstractSeries *series = Q_NULLPTR) const;
     // ******************
 
     void addAxis(QAbstractAxis *axis, Qt::Alignment alignment);
     void removeAxis(QAbstractAxis *axis);
-    QList<QAbstractAxis*> axes(Qt::Orientations orientation = Qt::Horizontal|Qt::Vertical, QAbstractSeries *series = 0) const;
+    QList<QAbstractAxis*> axes(Qt::Orientations orientation = Qt::Horizontal|Qt::Vertical, QAbstractSeries *series = Q_NULLPTR) const;
 
     void createDefaultAxes();
 
@@ -165,8 +165,8 @@ public:
     void setLocale(const QLocale &locale);
     QLocale locale() const;
 
-    QPointF mapToValue(const QPointF &position, QAbstractSeries *series = 0);
-    QPointF mapToPosition(const QPointF &value, QAbstractSeries *series = 0);
+    QPointF mapToValue(const QPointF &position, QAbstractSeries *series = Q_NULLPTR);
+    QPointF mapToPosition(const QPointF &value, QAbstractSeries *series = Q_NULLPTR);
 
     ChartType chartType() const;
 
diff --git a/src/charts/qchartview.h b/src/charts/qchartview.h
index c58f159..b435af0 100644
--- a/src/charts/qchartview.h
+++ b/src/charts/qchartview.h
@@ -51,8 +51,8 @@ public:
 
     Q_DECLARE_FLAGS(RubberBands, RubberBand)
 
-    explicit QChartView(QWidget *parent = 0);
-    explicit QChartView(QChart *chart, QWidget *parent = 0);
+    explicit QChartView(QWidget *parent = Q_NULLPTR);
+    explicit QChartView(QChart *chart, QWidget *parent = Q_NULLPTR);
     ~QChartView();
 
     void setRubberBand(const RubberBands &rubberBands);
diff --git a/src/charts/qpolarchart.h b/src/charts/qpolarchart.h
index 3e1c962..fa50dd0 100644
--- a/src/charts/qpolarchart.h
+++ b/src/charts/qpolarchart.h
@@ -43,12 +43,12 @@ public:
     Q_DECLARE_FLAGS(PolarOrientations, PolarOrientation)
 
 public:
-    explicit QPolarChart(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);
+    explicit QPolarChart(QGraphicsItem *parent = Q_NULLPTR, Qt::WindowFlags wFlags = Qt::WindowFlags());
     ~QPolarChart();
 
     void addAxis(QAbstractAxis *axis, PolarOrientation polarOrientation);
 
-    QList<QAbstractAxis*> axes(PolarOrientations polarOrientation = PolarOrientations(PolarOrientationRadial | PolarOrientationAngular), QAbstractSeries *series = 0) const;
+    QList<QAbstractAxis*> axes(PolarOrientations polarOrientation = PolarOrientations(PolarOrientationRadial | PolarOrientationAngular), QAbstractSeries *series = Q_NULLPTR) const;
 
     static PolarOrientation axisPolarOrientation(QAbstractAxis *axis);
 
diff --git a/src/charts/scatterchart/qscatterseries.h b/src/charts/scatterchart/qscatterseries.h
index f30458e..14a9807 100644
--- a/src/charts/scatterchart/qscatterseries.h
+++ b/src/charts/scatterchart/qscatterseries.h
@@ -46,7 +46,7 @@ public:
     };
 
 public:
-    explicit QScatterSeries(QObject *parent = 0);
+    explicit QScatterSeries(QObject *parent = Q_NULLPTR);
     ~QScatterSeries();
     QAbstractSeries::SeriesType type() const;
     void setPen(const QPen &pen);
diff --git a/src/charts/splinechart/qsplineseries.h b/src/charts/splinechart/qsplineseries.h
index e1b04ba..3ce901a 100644
--- a/src/charts/splinechart/qsplineseries.h
+++ b/src/charts/splinechart/qsplineseries.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QSplineSeries : public QLineSeries
     Q_OBJECT
 
 public:
-    explicit QSplineSeries(QObject *parent = 0);
+    explicit QSplineSeries(QObject *parent = Q_NULLPTR);
     ~QSplineSeries();
     QAbstractSeries::SeriesType type() const;
 
diff --git a/src/charts/xychart/qhxymodelmapper.h b/src/charts/xychart/qhxymodelmapper.h
index fa9defd..4e36d9b 100644
--- a/src/charts/xychart/qhxymodelmapper.h
+++ b/src/charts/xychart/qhxymodelmapper.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QHXYModelMapper : public QXYModelMapper
     Q_PROPERTY(int columnCount READ columnCount WRITE setColumnCount NOTIFY columnCountChanged)
 
 public:
-    explicit QHXYModelMapper(QObject *parent = 0);
+    explicit QHXYModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/xychart/qvxymodelmapper.h b/src/charts/xychart/qvxymodelmapper.h
index f24ed0a..b098417 100644
--- a/src/charts/xychart/qvxymodelmapper.h
+++ b/src/charts/xychart/qvxymodelmapper.h
@@ -37,7 +37,7 @@ class QT_CHARTS_EXPORT QVXYModelMapper : public QXYModelMapper
     Q_PROPERTY(int rowCount READ rowCount WRITE setRowCount NOTIFY rowCountChanged)
 
 public:
-    explicit QVXYModelMapper(QObject *parent = 0);
+    explicit QVXYModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/xychart/qxymodelmapper.h b/src/charts/xychart/qxymodelmapper.h
index e991d3b..3264d65 100644
--- a/src/charts/xychart/qxymodelmapper.h
+++ b/src/charts/xychart/qxymodelmapper.h
@@ -39,7 +39,7 @@ class QT_CHARTS_EXPORT QXYModelMapper : public QObject
     Q_OBJECT
 
 protected:
-    explicit QXYModelMapper(QObject *parent = 0);
+    explicit QXYModelMapper(QObject *parent = Q_NULLPTR);
 
     QAbstractItemModel *model() const;
     void setModel(QAbstractItemModel *model);
diff --git a/src/charts/xychart/qxyseries.h b/src/charts/xychart/qxyseries.h
index ddbccaf..a3e94fc 100644
--- a/src/charts/xychart/qxyseries.h
+++ b/src/charts/xychart/qxyseries.h
@@ -48,7 +48,7 @@ class QT_CHARTS_EXPORT QXYSeries : public QAbstractSeries
     Q_PROPERTY(bool pointLabelsClipping READ pointLabelsClipping WRITE setPointLabelsClipping NOTIFY pointLabelsClippingChanged)
 
 protected:
-    explicit QXYSeries(QXYSeriesPrivate &d, QObject *parent = 0);
+    explicit QXYSeries(QXYSeriesPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     ~QXYSeries();