Use the "nullptr" literal.

src/libs/vdxf/libdxfrw/libdxfrw.cpp

@@ -1641,7 +1641,7 @@ auto dxfRW::writeImage(DRW_Image *ent, const std::string &name) -> DRW_ImageDef
     {
         // search if exist imagedef with this mane (image inserted more than 1 time)
         // RLZ: imagedef_reactor seem needed to read in acad
-        DRW_ImageDef *id = NULL;
+        DRW_ImageDef *id = nullptr;
         for (unsigned int i = 0; i < imageDef.size(); i++)
         {
             if (imageDef.at(i)->name == name)
@@ -1682,7 +1682,7 @@ auto dxfRW::writeImage(DRW_Image *ent, const std::string &name) -> DRW_ImageDef
         id->reactors[idReactor] = toHexStr(static_cast<int>(ent->handle));
         return id;
     }
-    return NULL; // not exist in acad 12
+    return nullptr; // not exist in acad 12
 }
 
 auto dxfRW::writeBlockRecord(std::string name) -> bool

src/libs/vpropertyexplorer/plugins/vemptyproperty.cpp

@@ -20,15 +20,16 @@
 
 #include "vemptyproperty.h"
 
-#include <stddef.h>
 #include <QBrush>
 #include <QColor>
 #include <QFlags>
 #include <QFont>
+#include <stddef.h>
 
 #include "../vproperty.h"
 
-namespace VPE {
+namespace VPE
+{
 class VPropertyPrivate;
 } // namespace VPE
 
@@ -42,13 +43,11 @@ VPE::VEmptyProperty::VEmptyProperty(const QString& name)
 {
 }
 
-
 VPE::VEmptyProperty::VEmptyProperty(VPropertyPrivate *d)
   : VProperty(d)
 {
 }
 
-
 VPE::VEmptyProperty::~VEmptyProperty()
 {
     //
@@ -85,10 +84,9 @@ auto VPE::VEmptyProperty::createEditor(QWidget *parent, const QStyleOptionViewIt
     Q_UNUSED(parent)
     Q_UNUSED(delegate)
 
-    return NULL;
+    return nullptr;
 }
 
-
 //! Gets the data from the widget
 auto VPE::VEmptyProperty::getEditorData(const QWidget *editor) const -> QVariant
 {

src/libs/vpropertyexplorer/vpropertyfactorymanager.cpp

@@ -20,22 +20,22 @@
 
 #include "vpropertyfactorymanager.h"
 
-#include <stddef.h>
 #include <QList>
 #include <QMap>
 #include <QStringList>
+#include <stddef.h>
 
 #include "vabstractpropertyfactory.h"
 #include "vproperty.h"
 #include "vpropertyfactorymanager_p.h"
 #include "vstandardpropertyfactory.h"
 
-VPE::VPropertyFactoryManager* VPE::VPropertyFactoryManager::DefaultManager = NULL;
+VPE::VPropertyFactoryManager *VPE::VPropertyFactoryManager::DefaultManager = nullptr;
 
 VPE::VPropertyFactoryManager::VPropertyFactoryManager(QObject *parent)
-    : QObject(parent), d_ptr(new VPropertyFactoryManagerPrivate())
+  : QObject(parent),
+    d_ptr(new VPropertyFactoryManagerPrivate())
 {
-
 }
 
 VPE::VPropertyFactoryManager::~VPropertyFactoryManager()
@@ -49,7 +49,6 @@ VPE::VPropertyFactoryManager::~VPropertyFactoryManager()
         delete tmpFactory;
     }
 
-
     delete d_ptr;
     if (this == DefaultManager)
     {
@@ -120,7 +119,7 @@ auto VPE::VPropertyFactoryManager::createProperty(const QString &type, const QSt
                                                   const QString &default_value) -> VPE::VProperty *
 {
     VAbstractPropertyFactory *tmpFactory = getFactory(type);
-    VProperty* tmpResult = NULL;
+    VProperty *tmpResult = nullptr;
     if (tmpFactory)
     {
         tmpResult = tmpFactory->createProperty(type, name);

src/libs/vwidgets/qtcolorpicker.cpp

@@ -168,7 +168,7 @@ class ColorPickerItem : public QFrame
     Q_OBJECT // NOLINT
 
 public:
-    ColorPickerItem(const QColor &color = Qt::white, const QString &text = QString(), QWidget *parent = 0);
+    ColorPickerItem(const QColor &color = Qt::white, const QString &text = QString(), QWidget *parent = nullptr);
     ~ColorPickerItem();
 
     auto color() const -> QColor;
@@ -573,7 +573,7 @@ ColorPickerPopup::ColorPickerPopup(int width, bool withColorDialog, QWidget *par
     }
     else
     {
-        moreButton = 0;
+        moreButton = nullptr;
     }
 
     eventLoop = nullptr;
@@ -709,7 +709,7 @@ void ColorPickerPopup::updateSelected()
 {
     QLayoutItem *layoutItem;
     int i = 0;
-    while ((layoutItem = grid->itemAt(i)) != 0)
+    while ((layoutItem = grid->itemAt(i)) != nullptr)
     {
         QWidget *w = layoutItem->widget();
         if (w && w->inherits("ColorPickerItem"))
@@ -832,7 +832,7 @@ void ColorPickerPopup::keyPressEvent(QKeyEvent *e)
 
                 QLayoutItem *layoutItem;
                 int i = 0;
-                while ((layoutItem = grid->itemAt(i)) != 0)
+                while ((layoutItem = grid->itemAt(i)) != nullptr)
                 {
                     QWidget *wl = layoutItem->widget();
                     if (wl && wl->inherits("ColorPickerItem"))
@@ -857,7 +857,7 @@ void ColorPickerPopup::keyPressEvent(QKeyEvent *e)
 
                 QLayoutItem *layoutItem;
                 int i = 0;
-                while ((layoutItem = grid->itemAt(i)) != 0)
+                while ((layoutItem = grid->itemAt(i)) != nullptr)
                 {
                     QWidget *wl = layoutItem->widget();
                     if (wl && wl->inherits("ColorPickerItem"))

src/libs/vwidgets/qtcolorpicker.h

@@ -64,7 +64,7 @@ class QtColorPicker : public QPushButton
     Q_PROPERTY(bool colorDialog READ colorDialogEnabled WRITE setColorDialogEnabled)
 
 public:
-    explicit QtColorPicker(QWidget *parent = 0, int columns = -1, bool enableColorDialog = true);
+    explicit QtColorPicker(QWidget *parent = nullptr, int columns = -1, bool enableColorDialog = true);
 
     ~QtColorPicker() override;