QmlDesigner: Consistently use nullptr

Fixed by clang-tidy modernize-use-nullptr.

Change-Id: Ia2ba90d137365292e95ac340166ed5d1f66a2a56
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

66 files changed, 79 insertions, 79 deletions

diff --git a/src/plugins/qmldesigner/components/componentcore/addsignalhandlerdialog.h b/src/plugins/qmldesigner/components/componentcore/addsignalhandlerdialog.h
index c890c79aa3..537e227f81 100644
--- a/src/plugins/qmldesigner/components/componentcore/addsignalhandlerdialog.h
+++ b/src/plugins/qmldesigner/components/componentcore/addsignalhandlerdialog.h
@@ -37,7 +37,7 @@ class AddSignalHandlerDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit AddSignalHandlerDialog(QWidget *parent = 0);
+    explicit AddSignalHandlerDialog(QWidget *parent = nullptr);
     ~AddSignalHandlerDialog() override;
     void setSignals(const QStringList &_signals);
     QString signal() const;
diff --git a/src/plugins/qmldesigner/components/componentcore/changestyleaction.h b/src/plugins/qmldesigner/components/componentcore/changestyleaction.h
index 816ccf99c3..fe6d275e12 100644
--- a/src/plugins/qmldesigner/components/componentcore/changestyleaction.h
+++ b/src/plugins/qmldesigner/components/componentcore/changestyleaction.h
@@ -43,7 +43,7 @@ class ChangeStyleWidgetAction : public QWidgetAction
     Q_OBJECT
 
 public:
-    explicit ChangeStyleWidgetAction(QObject *parent = 0);
+    explicit ChangeStyleWidgetAction(QObject *parent = nullptr);
     void handleModelUpdate(const QString &style);
 
 protected:
diff --git a/src/plugins/qmldesigner/components/componentcore/crumblebar.h b/src/plugins/qmldesigner/components/componentcore/crumblebar.h
index a33442f7bf..d29d8f594e 100644
--- a/src/plugins/qmldesigner/components/componentcore/crumblebar.h
+++ b/src/plugins/qmldesigner/components/componentcore/crumblebar.h
@@ -36,7 +36,7 @@ class CrumbleBar : public QObject
 {
     Q_OBJECT
 public:
-    explicit CrumbleBar(QObject *parent = 0);
+    explicit CrumbleBar(QObject *parent = nullptr);
     ~CrumbleBar() override;
 
     void pushFile(const Utils::FileName &fileName);
diff --git a/src/plugins/qmldesigner/components/componentcore/designeractionmanager.h b/src/plugins/qmldesigner/components/componentcore/designeractionmanager.h
index 03660ca6b8..b84bbb71af 100644
--- a/src/plugins/qmldesigner/components/componentcore/designeractionmanager.h
+++ b/src/plugins/qmldesigner/components/componentcore/designeractionmanager.h
@@ -89,7 +89,7 @@ public:
     void createDefaultAddResourceHandler();
     DesignerActionManagerView *view();
 
-    DesignerActionToolBar *createToolBar(QWidget *parent = 0) const;
+    DesignerActionToolBar *createToolBar(QWidget *parent = nullptr) const;
     void polishActions() const;
     QGraphicsWidget *createFormEditorToolBar(QGraphicsItem *parent);
 
diff --git a/src/plugins/qmldesigner/components/debugview/debugview.h b/src/plugins/qmldesigner/components/debugview/debugview.h
index 1ba9c69b33..ba6e053786 100644
--- a/src/plugins/qmldesigner/components/debugview/debugview.h
+++ b/src/plugins/qmldesigner/components/debugview/debugview.h
@@ -39,7 +39,7 @@ class  DebugView : public AbstractView
     Q_OBJECT
 
 public:
-    DebugView(QObject *parent = 0);
+    DebugView(QObject *parent = nullptr);
     ~DebugView() override;
 
     // AbstractView
diff --git a/src/plugins/qmldesigner/components/debugview/debugviewwidget.h b/src/plugins/qmldesigner/components/debugview/debugviewwidget.h
index 12629b4c92..2935973160 100644
--- a/src/plugins/qmldesigner/components/debugview/debugviewwidget.h
+++ b/src/plugins/qmldesigner/components/debugview/debugviewwidget.h
@@ -37,7 +37,7 @@ class DebugViewWidget : public QWidget
 {
     Q_OBJECT
 public:
-    DebugViewWidget(QWidget *parent = 0);
+    DebugViewWidget(QWidget *parent = nullptr);
 
     void addLogMessage(const QString &topic, const QString &message, bool highlight = false);
     void addErrorMessage(const QString &topic, const QString &message);
diff --git a/src/plugins/qmldesigner/components/formeditor/anchorindicatorgraphicsitem.h b/src/plugins/qmldesigner/components/formeditor/anchorindicatorgraphicsitem.h
index f084573e4b..43393c3248 100644
--- a/src/plugins/qmldesigner/components/formeditor/anchorindicatorgraphicsitem.h
+++ b/src/plugins/qmldesigner/components/formeditor/anchorindicatorgraphicsitem.h
@@ -34,7 +34,7 @@ class AnchorIndicatorGraphicsItem : public QGraphicsObject
 {
     Q_OBJECT
 public:
-    explicit AnchorIndicatorGraphicsItem(QGraphicsItem *parent = 0);
+    explicit AnchorIndicatorGraphicsItem(QGraphicsItem *parent = nullptr);
 
 
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
diff --git a/src/plugins/qmldesigner/components/formeditor/bindingindicatorgraphicsitem.h b/src/plugins/qmldesigner/components/formeditor/bindingindicatorgraphicsitem.h
index 4c8141ac97..e029566d3b 100644
--- a/src/plugins/qmldesigner/components/formeditor/bindingindicatorgraphicsitem.h
+++ b/src/plugins/qmldesigner/components/formeditor/bindingindicatorgraphicsitem.h
@@ -32,7 +32,7 @@ class BindingIndicatorGraphicsItem : public QGraphicsObject
 {
     Q_OBJECT
 public:
-    explicit BindingIndicatorGraphicsItem(QGraphicsItem *parent = 0);
+    explicit BindingIndicatorGraphicsItem(QGraphicsItem *parent = nullptr);
 
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
     QRectF boundingRect() const override;
diff --git a/src/plugins/qmldesigner/components/formeditor/dragtool.h b/src/plugins/qmldesigner/components/formeditor/dragtool.h
index f51ca07611..017177fc20 100644
--- a/src/plugins/qmldesigner/components/formeditor/dragtool.h
+++ b/src/plugins/qmldesigner/components/formeditor/dragtool.h
@@ -81,7 +81,7 @@ protected:
     void abort();
     void createQmlItemNode(const ItemLibraryEntry &itemLibraryEntry, const QmlItemNode &parentNode, const QPointF &scenePos);
     void createQmlItemNodeFromImage(const QString &imageName, const QmlItemNode &parentNode, const QPointF &scenePos);
-    FormEditorItem *targetContainerOrRootItem(const QList<QGraphicsItem*> &itemList, FormEditorItem *urrentItem = 0);
+    FormEditorItem *targetContainerOrRootItem(const QList<QGraphicsItem*> &itemList, FormEditorItem *urrentItem = nullptr);
     void begin(QPointF scenePos);
     void end();
     void end(Snapper::Snapping useSnapping);
diff --git a/src/plugins/qmldesigner/components/formeditor/formeditorgraphicsview.h b/src/plugins/qmldesigner/components/formeditor/formeditorgraphicsview.h
index 8387a78c41..2c6a57b425 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditorgraphicsview.h
+++ b/src/plugins/qmldesigner/components/formeditor/formeditorgraphicsview.h
@@ -32,7 +32,7 @@ class FormEditorGraphicsView : public QGraphicsView
 {
 Q_OBJECT
 public:
-    explicit FormEditorGraphicsView(QWidget *parent = 0);
+    explicit FormEditorGraphicsView(QWidget *parent = nullptr);
 
     void setRootItemRect(const QRectF &rect);
     QRectF rootItemRect() const;
diff --git a/src/plugins/qmldesigner/components/formeditor/formeditoritem.h b/src/plugins/qmldesigner/components/formeditor/formeditoritem.h
index 446537c9ff..cc87bfe42a 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditoritem.h
+++ b/src/plugins/qmldesigner/components/formeditor/formeditoritem.h
@@ -51,7 +51,7 @@ class QMLDESIGNERCORE_EXPORT FormEditorItem : public QGraphicsItem
 public:
     ~FormEditorItem() override;
 
-    void paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = 0 ) override;
+    void paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = nullptr ) override;
 
     bool isContainer() const;
     QmlItemNode qmlItemNode() const;
diff --git a/src/plugins/qmldesigner/components/formeditor/formeditortoolbutton.h b/src/plugins/qmldesigner/components/formeditor/formeditortoolbutton.h
index df90f3052e..4bd7b26b76 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditortoolbutton.h
+++ b/src/plugins/qmldesigner/components/formeditor/formeditortoolbutton.h
@@ -40,8 +40,8 @@ class FormEditorToolButton : public QGraphicsWidget
     Q_OBJECT
 
 public:
-    explicit FormEditorToolButton(QAction *action, QGraphicsItem *parent = 0);
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) override;
+    explicit FormEditorToolButton(QAction *action, QGraphicsItem *parent = nullptr);
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr) override;
     QRectF boundingRect() const override;
 
 signals:
diff --git a/src/plugins/qmldesigner/components/formeditor/formeditorview.h b/src/plugins/qmldesigner/components/formeditor/formeditorview.h
index b3a1b3ff71..186730a0e2 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditorview.h
+++ b/src/plugins/qmldesigner/components/formeditor/formeditorview.h
@@ -57,7 +57,7 @@ class QMLDESIGNERCORE_EXPORT FormEditorView : public AbstractView
     Q_OBJECT
 
 public:
-    FormEditorView(QObject *parent = 0);
+    FormEditorView(QObject *parent = nullptr);
     ~FormEditorView() override;
 
     // AbstractView
diff --git a/src/plugins/qmldesigner/components/formeditor/layeritem.h b/src/plugins/qmldesigner/components/formeditor/layeritem.h
index bc65ba0500..cebc32851b 100644
--- a/src/plugins/qmldesigner/components/formeditor/layeritem.h
+++ b/src/plugins/qmldesigner/components/formeditor/layeritem.h
@@ -39,7 +39,7 @@ public:
     };
     LayerItem(FormEditorScene* scene);
     ~LayerItem() override;
-    void paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = 0 ) override;
+    void paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = nullptr ) override;
     QRectF boundingRect() const override;
     int type() const override;
 
diff --git a/src/plugins/qmldesigner/components/formeditor/lineeditaction.h b/src/plugins/qmldesigner/components/formeditor/lineeditaction.h
index 6867b2e5a6..49a218cc0e 100644
--- a/src/plugins/qmldesigner/components/formeditor/lineeditaction.h
+++ b/src/plugins/qmldesigner/components/formeditor/lineeditaction.h
@@ -34,7 +34,7 @@ class LineEditAction : public QWidgetAction
 {
     Q_OBJECT
 public:
-    explicit LineEditAction(const QString &placeHolderText, QObject *parent = 0);
+    explicit LineEditAction(const QString &placeHolderText, QObject *parent = nullptr);
 
     void setLineEditText(const QString &text);
     void clearLineEditText();
diff --git a/src/plugins/qmldesigner/components/formeditor/numberseriesaction.h b/src/plugins/qmldesigner/components/formeditor/numberseriesaction.h
index c3fd8d92a5..3262c6ecba 100644
--- a/src/plugins/qmldesigner/components/formeditor/numberseriesaction.h
+++ b/src/plugins/qmldesigner/components/formeditor/numberseriesaction.h
@@ -37,7 +37,7 @@ class NumberSeriesAction : public QWidgetAction
 {
 Q_OBJECT
 public:
-    explicit NumberSeriesAction(QObject *parent = 0);
+    explicit NumberSeriesAction(QObject *parent = nullptr);
 
     void addEntry(const QString &text, const QVariant &value);
     void setCurrentEntryIndex(int index);
diff --git a/src/plugins/qmldesigner/components/formeditor/snapper.h b/src/plugins/qmldesigner/components/formeditor/snapper.h
index 259ee67c0e..cdc2b5a4e1 100644
--- a/src/plugins/qmldesigner/components/formeditor/snapper.h
+++ b/src/plugins/qmldesigner/components/formeditor/snapper.h
@@ -57,8 +57,8 @@ public:
     double snapLeftOffset(const QRectF &boundingRect) const;
     double snapBottomOffset(const QRectF &boundingRect) const;
 
-    QList<QLineF> horizontalSnappedLines(const QRectF &boundingRect, QList<QRectF> *boundingRects = 0) const;
-    QList<QLineF> verticalSnappedLines(const QRectF &boundingRect, QList<QRectF> *boundingRects = 0) const;
+    QList<QLineF> horizontalSnappedLines(const QRectF &boundingRect, QList<QRectF> *boundingRects = nullptr) const;
+    QList<QLineF> verticalSnappedLines(const QRectF &boundingRect, QList<QRectF> *boundingRects = nullptr) const;
 
     void setSnappingDistance(double snappingDistance);
     double snappingDistance() const;
@@ -90,14 +90,14 @@ protected:
                          double snapLine,
                          double lowerLimit,
                          double upperLimit,
-                         QList<QRectF> *boundingRects = 0) const;
+                         QList<QRectF> *boundingRects = nullptr) const;
 
     QList<QLineF> findSnappingOffsetLines(const SnapLineMap &snappingOffsetMap,
                                     Qt::Orientation orientation,
                                     double snapLine,
                                     double lowerLimit,
                                     double upperLimit,
-                                    QList<QRectF> *boundingRects = 0) const;
+                                    QList<QRectF> *boundingRects = nullptr) const;
 
     QLineF createSnapLine(Qt::Orientation orientation,
                          double snapLine,
diff --git a/src/plugins/qmldesigner/components/importmanager/importlabel.h b/src/plugins/qmldesigner/components/importmanager/importlabel.h
index ed4e206761..31a8c4c856 100644
--- a/src/plugins/qmldesigner/components/importmanager/importlabel.h
+++ b/src/plugins/qmldesigner/components/importmanager/importlabel.h
@@ -36,7 +36,7 @@ class ImportLabel : public QWidget
 {
     Q_OBJECT
 public:
-    explicit ImportLabel(QWidget *parent = 0);
+    explicit ImportLabel(QWidget *parent = nullptr);
 
     void setImport(const Import &import);
     const Import import() const;
diff --git a/src/plugins/qmldesigner/components/importmanager/importmanagercombobox.h b/src/plugins/qmldesigner/components/importmanager/importmanagercombobox.h
index f841d64ca8..350a2fcb83 100644
--- a/src/plugins/qmldesigner/components/importmanager/importmanagercombobox.h
+++ b/src/plugins/qmldesigner/components/importmanager/importmanagercombobox.h
@@ -31,7 +31,7 @@ class ImportManagerComboBox : public QComboBox
 {
     Q_OBJECT
 public:
-    explicit ImportManagerComboBox(QWidget *parent = 0);
+    explicit ImportManagerComboBox(QWidget *parent = nullptr);
 
 protected:
     void paintEvent(QPaintEvent *e) override;
diff --git a/src/plugins/qmldesigner/components/importmanager/importmanagerview.h b/src/plugins/qmldesigner/components/importmanager/importmanagerview.h
index f11cb2ff4b..e2bba4d0b3 100644
--- a/src/plugins/qmldesigner/components/importmanager/importmanagerview.h
+++ b/src/plugins/qmldesigner/components/importmanager/importmanagerview.h
@@ -36,7 +36,7 @@ class ImportManagerView : public AbstractView
 {
     Q_OBJECT
 public:
-    explicit ImportManagerView(QObject *parent = 0);
+    explicit ImportManagerView(QObject *parent = nullptr);
     ~ImportManagerView() override;
 
     bool hasWidget() const override;
diff --git a/src/plugins/qmldesigner/components/importmanager/importswidget.h b/src/plugins/qmldesigner/components/importmanager/importswidget.h
index bfe3377595..22603f9bc0 100644
--- a/src/plugins/qmldesigner/components/importmanager/importswidget.h
+++ b/src/plugins/qmldesigner/components/importmanager/importswidget.h
@@ -41,7 +41,7 @@ class ImportsWidget : public QWidget
 {
     Q_OBJECT
 public:
-    explicit ImportsWidget(QWidget *parent = 0);
+    explicit ImportsWidget(QWidget *parent = nullptr);
 
     void setImports(const QList<Import> &imports);
     void removeImports();
diff --git a/src/plugins/qmldesigner/components/integration/componentview.h b/src/plugins/qmldesigner/components/integration/componentview.h
index 4740a7196a..d9b92085c4 100644
--- a/src/plugins/qmldesigner/components/integration/componentview.h
+++ b/src/plugins/qmldesigner/components/integration/componentview.h
@@ -49,7 +49,7 @@ public:
         ModelNodeRole = Qt::UserRole
     };
 
-    ComponentView(QObject *parent = 0);
+    ComponentView(QObject *parent = nullptr);
 
     void modelAttached(Model *model) override;
     void modelAboutToBeDetached(Model *model) override;
diff --git a/src/plugins/qmldesigner/components/integration/designdocument.h b/src/plugins/qmldesigner/components/integration/designdocument.h
index c80750e2a7..74fe54fcaa 100644
--- a/src/plugins/qmldesigner/components/integration/designdocument.h
+++ b/src/plugins/qmldesigner/components/integration/designdocument.h
@@ -60,7 +60,7 @@ class QMLDESIGNERCORE_EXPORT DesignDocument: public QObject
 {
     Q_OBJECT
 public:
-    DesignDocument(QObject *parent = 0);
+    DesignDocument(QObject *parent = nullptr);
     ~DesignDocument() override;
 
     QString displayName() const;
diff --git a/src/plugins/qmldesigner/components/integration/designdocumentview.h b/src/plugins/qmldesigner/components/integration/designdocumentview.h
index 006f119441..9e841c743a 100644
--- a/src/plugins/qmldesigner/components/integration/designdocumentview.h
+++ b/src/plugins/qmldesigner/components/integration/designdocumentview.h
@@ -37,7 +37,7 @@ class QMLDESIGNERCORE_EXPORT DesignDocumentView : public AbstractView
 {
         Q_OBJECT
 public:
-    DesignDocumentView(QObject *parent = 0);
+    DesignDocumentView(QObject *parent = nullptr);
     ~DesignDocumentView() override;
 
     ModelNode insertModel(const ModelNode &modelNode);
diff --git a/src/plugins/qmldesigner/components/integration/stackedutilitypanelcontroller.h b/src/plugins/qmldesigner/components/integration/stackedutilitypanelcontroller.h
index f3e2d1edad..1e15bc27ae 100644
--- a/src/plugins/qmldesigner/components/integration/stackedutilitypanelcontroller.h
+++ b/src/plugins/qmldesigner/components/integration/stackedutilitypanelcontroller.h
@@ -40,7 +40,7 @@ class StackedUtilityPanelController : public UtilityPanelController
     Q_OBJECT
 
 public:
-    StackedUtilityPanelController(QObject* parent = 0);
+    StackedUtilityPanelController(QObject* parent = nullptr);
 
     void show(DesignDocument* DesignDocument);
     void close(DesignDocument* DesignDocument);
diff --git a/src/plugins/qmldesigner/components/integration/utilitypanelcontroller.h b/src/plugins/qmldesigner/components/integration/utilitypanelcontroller.h
index dafba404f6..00040b4db5 100644
--- a/src/plugins/qmldesigner/components/integration/utilitypanelcontroller.h
+++ b/src/plugins/qmldesigner/components/integration/utilitypanelcontroller.h
@@ -36,7 +36,7 @@ class UtilityPanelController : public QObject
     Q_OBJECT
 
 public:
-    UtilityPanelController(QObject* parent = 0);
+    UtilityPanelController(QObject* parent = nullptr);
     ~UtilityPanelController() override = 0;
 
     QWidget* widget();
diff --git a/src/plugins/qmldesigner/components/itemlibrary/customfilesystemmodel.h b/src/plugins/qmldesigner/components/itemlibrary/customfilesystemmodel.h
index 31cd9fcb98..7ad76ace1c 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/customfilesystemmodel.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/customfilesystemmodel.h
@@ -41,7 +41,7 @@ class CustomFileSystemModel : public QAbstractListModel
 {
     Q_OBJECT
 public:
-    CustomFileSystemModel(QObject *parent = 0);
+    CustomFileSystemModel(QObject *parent = nullptr);
 
     void setFilter(QDir::Filters filters);
     QString rootPath() const;
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarymodel.h b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarymodel.h
index 4f2ee8f52c..99496c9f42 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarymodel.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarymodel.h
@@ -45,7 +45,7 @@ class ItemLibraryModel: public QAbstractListModel {
     Q_PROPERTY(QString searchText READ searchText WRITE setSearchText NOTIFY searchTextChanged)
 
 public:
-    explicit ItemLibraryModel(QObject *parent = 0);
+    explicit ItemLibraryModel(QObject *parent = nullptr);
     ~ItemLibraryModel() override;
 
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryresourceview.h b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryresourceview.h
index e613285a3d..a29edac867 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryresourceview.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryresourceview.h
@@ -37,7 +37,7 @@ class ItemLibraryResourceView : public QListView {
 
     Q_OBJECT
 public:
-    explicit ItemLibraryResourceView(QWidget *parent = 0);
+    explicit ItemLibraryResourceView(QWidget *parent = nullptr);
 
     void startDrag(Qt::DropActions supportedActions) override;
 private:
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysection.h b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysection.h
index bb49909b77..8287f0fe23 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysection.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysection.h
@@ -39,7 +39,7 @@ class ItemLibrarySection: public QObject {
     Q_PROPERTY(bool sectionExpanded READ sectionExpanded FINAL)
 
 public:
-    ItemLibrarySection(const QString &sectionName, QObject *parent = 0);
+    ItemLibrarySection(const QString &sectionName, QObject *parent = nullptr);
 
     QString sectionName() const;
     bool sectionExpanded() const;
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysectionmodel.h b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysectionmodel.h
index 472bef66ee..6d543b5afa 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysectionmodel.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarysectionmodel.h
@@ -38,7 +38,7 @@ class ItemLibrarySectionModel: public QAbstractListModel {
     Q_OBJECT
 
 public:
-    ItemLibrarySectionModel(QObject *parent = 0);
+    ItemLibrarySectionModel(QObject *parent = nullptr);
     ~ItemLibrarySectionModel() override;
 
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryview.h b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryview.h
index d7b6cd3ee5..09535c3230 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibraryview.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibraryview.h
@@ -40,7 +40,7 @@ class ItemLibraryView : public AbstractView
     Q_OBJECT
 
 public:
-    ItemLibraryView(QObject* parent = 0);
+    ItemLibraryView(QObject* parent = nullptr);
     ~ItemLibraryView() override;
 
     bool hasWidget() const override;
diff --git a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarywidget.h b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarywidget.h
index 5e07f50875..006de006fc 100644
--- a/src/plugins/qmldesigner/components/itemlibrary/itemlibrarywidget.h
+++ b/src/plugins/qmldesigner/components/itemlibrary/itemlibrarywidget.h
@@ -63,7 +63,7 @@ class ItemLibraryWidget : public QFrame
     };
 
 public:
-    ItemLibraryWidget(QWidget *parent = 0);
+    ItemLibraryWidget(QWidget *parent = nullptr);
 
     void setItemLibraryInfo(ItemLibraryInfo *itemLibraryInfo);
     QList<QToolButton *> createToolBarWidgets();
diff --git a/src/plugins/qmldesigner/components/navigator/navigatortreemodel.h b/src/plugins/qmldesigner/components/navigator/navigatortreemodel.h
index 2498415551..f10198adcc 100644
--- a/src/plugins/qmldesigner/components/navigator/navigatortreemodel.h
+++ b/src/plugins/qmldesigner/components/navigator/navigatortreemodel.h
@@ -45,7 +45,7 @@ class NavigatorTreeModel : public QAbstractItemModel, public NavigatorModelInter
 
 public:
 
-    explicit NavigatorTreeModel(QObject *parent = 0);
+    explicit NavigatorTreeModel(QObject *parent = nullptr);
     ~NavigatorTreeModel() override;
 
     QVariant data(const QModelIndex &index, int role) const override;
diff --git a/src/plugins/qmldesigner/components/navigator/navigatortreeview.h b/src/plugins/qmldesigner/components/navigator/navigatortreeview.h
index 1589d70248..cc5a0e344d 100644
--- a/src/plugins/qmldesigner/components/navigator/navigatortreeview.h
+++ b/src/plugins/qmldesigner/components/navigator/navigatortreeview.h
@@ -35,7 +35,7 @@ class NavigatorTreeView : public QTreeView
     Q_OBJECT
 
 public:
-    NavigatorTreeView(QWidget *parent = 0);
+    NavigatorTreeView(QWidget *parent = nullptr);
     static void drawSelectionBackground(QPainter *painter, const QStyleOption &option);
 };
 }
diff --git a/src/plugins/qmldesigner/components/navigator/navigatorview.h b/src/plugins/qmldesigner/components/navigator/navigatorview.h
index e57b008184..057e83a74d 100644
--- a/src/plugins/qmldesigner/components/navigator/navigatorview.h
+++ b/src/plugins/qmldesigner/components/navigator/navigatorview.h
@@ -54,7 +54,7 @@ class NavigatorView : public AbstractView
     Q_OBJECT
 
 public:
-    NavigatorView(QObject* parent = 0);
+    NavigatorView(QObject* parent = nullptr);
     ~NavigatorView() override;
 
     bool hasWidget() const override;
diff --git a/src/plugins/qmldesigner/components/propertyeditor/designerpropertymap.h b/src/plugins/qmldesigner/components/propertyeditor/designerpropertymap.h
index d520cab714..c0bdefeff3 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/designerpropertymap.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/designerpropertymap.h
@@ -35,7 +35,7 @@ class DesignerPropertyMap : public QQmlPropertyMap
 {
 
 public:
-    DesignerPropertyMap(QObject *parent = 0);
+    DesignerPropertyMap(QObject *parent = nullptr);
 
     QVariant value(const QString &key) const;
 
diff --git a/src/plugins/qmldesigner/components/propertyeditor/fileresourcesmodel.h b/src/plugins/qmldesigner/components/propertyeditor/fileresourcesmodel.h
index db0dec2105..e0d6fc9725 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/fileresourcesmodel.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/fileresourcesmodel.h
@@ -43,7 +43,7 @@ class FileResourcesModel : public QObject
     Q_PROPERTY(QStringList fileModel READ fileModel NOTIFY fileModelChanged)
 
 public:
-    explicit FileResourcesModel(QObject *parent = 0);
+    explicit FileResourcesModel(QObject *parent = nullptr);
 
     void setModelNodeBackend(const QVariant &modelNodeBackend);
     QString fileName() const;
diff --git a/src/plugins/qmldesigner/components/propertyeditor/gradientmodel.h b/src/plugins/qmldesigner/components/propertyeditor/gradientmodel.h
index 20efd63f26..2ca8b93c42 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/gradientmodel.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/gradientmodel.h
@@ -41,7 +41,7 @@ class GradientModel : public QAbstractListModel
     Q_PROPERTY(bool hasGradient READ hasGradient NOTIFY hasGradientChanged)
 
 public:
-    explicit GradientModel(QObject *parent = 0);
+    explicit GradientModel(QObject *parent = nullptr);
 
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
 
diff --git a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorcontextobject.h b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorcontextobject.h
index 212f5742cd..42f4951a58 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorcontextobject.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorcontextobject.h
@@ -62,7 +62,7 @@ class PropertyEditorContextObject : public QObject
     Q_PROPERTY(QQmlComponent* specificQmlComponent READ specificQmlComponent NOTIFY specificQmlComponentChanged)
 
 public:
-    PropertyEditorContextObject(QObject *parent = 0);
+    PropertyEditorContextObject(QObject *parent = nullptr);
 
     QUrl globalBaseUrl() const {return m_globalBaseUrl; }
     QUrl specificsUrl() const {return m_specificsUrl; }
diff --git a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h
index 6d3980fab3..99c38feb34 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h
@@ -43,7 +43,7 @@ class PropertyEditorNodeWrapper : public QObject {
     Q_PROPERTY(QString type READ type NOTIFY typeChanged)
 
 public:
-    PropertyEditorNodeWrapper(QObject *parent=0);
+    PropertyEditorNodeWrapper(QObject *parent=nullptr);
     PropertyEditorNodeWrapper(PropertyEditorValue* parent);
     bool exists();
     QString type();
@@ -87,7 +87,7 @@ class PropertyEditorValue : public QObject
     Q_PROPERTY(PropertyEditorNodeWrapper* complexNode READ complexNode NOTIFY complexNodeChanged FINAL)
 
 public:
-    PropertyEditorValue(QObject *parent=0);
+    PropertyEditorValue(QObject *parent=nullptr);
 
     QVariant value() const;
     void setValueWithEmit(const QVariant &value);
diff --git a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorview.h b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorview.h
index dd1c6b93db..85bd8286f5 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorview.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorview.h
@@ -51,7 +51,7 @@ class PropertyEditorView: public AbstractView
     Q_OBJECT
 
 public:
-    PropertyEditorView(QWidget *parent = 0);
+    PropertyEditorView(QWidget *parent = nullptr);
     ~PropertyEditorView() override;
 
     bool hasWidget() const override;
diff --git a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorwidget.h b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorwidget.h
index 3691bba69f..035363433f 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorwidget.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorwidget.h
@@ -35,7 +35,7 @@ class PropertyEditorWidget : public QStackedWidget
 Q_OBJECT
 
 public:
-    PropertyEditorWidget(QWidget *parent = 0);
+    PropertyEditorWidget(QWidget *parent = nullptr);
 
 signals:
     void resized();
diff --git a/src/plugins/qmldesigner/components/propertyeditor/qmlanchorbindingproxy.h b/src/plugins/qmldesigner/components/propertyeditor/qmlanchorbindingproxy.h
index 4c224caf07..cf42ea055a 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/qmlanchorbindingproxy.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/qmlanchorbindingproxy.h
@@ -85,7 +85,7 @@ public:
 
     //only enable if node has parent
 
-    QmlAnchorBindingProxy(QObject *parent = 0);
+    QmlAnchorBindingProxy(QObject *parent = nullptr);
     ~QmlAnchorBindingProxy() override;
 
     void setup(const QmlItemNode &itemNode);
diff --git a/src/plugins/qmldesigner/components/propertyeditor/qmlmodelnodeproxy.h b/src/plugins/qmldesigner/components/propertyeditor/qmlmodelnodeproxy.h
index a70f90d04f..0a73583355 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/qmlmodelnodeproxy.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/qmlmodelnodeproxy.h
@@ -38,7 +38,7 @@ class QmlModelNodeProxy : public QObject
      Q_PROPERTY(QmlDesigner::ModelNode modelNode READ modelNode NOTIFY modelNodeChanged)
 
 public:
-    explicit QmlModelNodeProxy(QObject *parent = 0);
+    explicit QmlModelNodeProxy(QObject *parent = nullptr);
 
     void setup(const QmlItemNode &itemNode);
 
diff --git a/src/plugins/qmldesigner/components/propertyeditor/quick2propertyeditorview.h b/src/plugins/qmldesigner/components/propertyeditor/quick2propertyeditorview.h
index 0394c72ec3..7bfc6f1558 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/quick2propertyeditorview.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/quick2propertyeditorview.h
@@ -35,7 +35,7 @@ class Quick2PropertyEditorView : public QQuickWidget
     Q_OBJECT
 
 public:
-    explicit Quick2PropertyEditorView(QWidget *parent = 0);
+    explicit Quick2PropertyEditorView(QWidget *parent = nullptr);
 
     static void registerQmlTypes();
 };
diff --git a/src/plugins/qmldesigner/components/stateseditor/stateseditorview.h b/src/plugins/qmldesigner/components/stateseditor/stateseditorview.h
index dab49232f7..155029ede0 100644
--- a/src/plugins/qmldesigner/components/stateseditor/stateseditorview.h
+++ b/src/plugins/qmldesigner/components/stateseditor/stateseditorview.h
@@ -39,7 +39,7 @@ class StatesEditorView : public AbstractView {
     Q_OBJECT
 
 public:
-    explicit StatesEditorView(QObject *parent = 0);
+    explicit StatesEditorView(QObject *parent = nullptr);
     ~StatesEditorView() override;
 
     void renameState(int internalNodeId,const QString &newName);
diff --git a/src/plugins/qmldesigner/components/texteditor/texteditorstatusbar.h b/src/plugins/qmldesigner/components/texteditor/texteditorstatusbar.h
index 493c3a9b81..24aec5b9d7 100644
--- a/src/plugins/qmldesigner/components/texteditor/texteditorstatusbar.h
+++ b/src/plugins/qmldesigner/components/texteditor/texteditorstatusbar.h
@@ -33,7 +33,7 @@ class TextEditorStatusBar : public QToolBar
 {
     Q_OBJECT
 public:
-    explicit TextEditorStatusBar(QWidget *parent = 0);
+    explicit TextEditorStatusBar(QWidget *parent = nullptr);
     void clearText();
     void setText(const QString &text);
 private:
diff --git a/src/plugins/qmldesigner/components/texteditor/texteditorview.h b/src/plugins/qmldesigner/components/texteditor/texteditorview.h
index a76a1c4910..f59bc5d58b 100644
--- a/src/plugins/qmldesigner/components/texteditor/texteditorview.h
+++ b/src/plugins/qmldesigner/components/texteditor/texteditorview.h
@@ -47,7 +47,7 @@ class QMLDESIGNERCORE_EXPORT TextEditorView : public AbstractView
     Q_OBJECT
 
 public:
-    TextEditorView(QObject *parent = 0);
+    TextEditorView(QObject *parent = nullptr);
     ~TextEditorView() override;
 
     // AbstractView
diff --git a/src/plugins/qmldesigner/designercore/include/abstractview.h b/src/plugins/qmldesigner/designercore/include/abstractview.h
index 45cfd88cca..610d137acc 100644
--- a/src/plugins/qmldesigner/designercore/include/abstractview.h
+++ b/src/plugins/qmldesigner/designercore/include/abstractview.h
@@ -123,7 +123,7 @@ public:
       EmptyPropertiesRemoved = 0x2
     };
     Q_DECLARE_FLAGS(PropertyChangeFlags, PropertyChangeFlag)
-    AbstractView(QObject *parent = 0)
+    AbstractView(QObject *parent = nullptr)
             : QObject(parent) {}
 
     ~AbstractView() override;
@@ -267,8 +267,8 @@ public:
 protected:
     void setModel(Model * model);
     void removeModel();
-    static WidgetInfo createWidgetInfo(QWidget *widget = 0,
-                                       WidgetInfo::ToolBarWidgetFactoryInterface *toolBarWidgetFactory = 0,
+    static WidgetInfo createWidgetInfo(QWidget *widget = nullptr,
+                                       WidgetInfo::ToolBarWidgetFactoryInterface *toolBarWidgetFactory = nullptr,
                                        const QString &uniqueId = QString(),
                                        WidgetInfo::PlacementHint placementHint = WidgetInfo::NoPane,
                                        int placementPriority = 0,
diff --git a/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h b/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h
index 8b74335209..9cca2ceb7e 100644
--- a/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h
+++ b/src/plugins/qmldesigner/designercore/include/itemlibraryinfo.h
@@ -116,7 +116,7 @@ signals:
     void entriesChanged();
 
 private: // functions
-    ItemLibraryInfo(QObject *parent = 0);
+    ItemLibraryInfo(QObject *parent = nullptr);
     void setBaseInfo(ItemLibraryInfo *m_baseInfo);
 
 private: // variables
diff --git a/src/plugins/qmldesigner/designercore/include/model.h b/src/plugins/qmldesigner/designercore/include/model.h
index 168c525ed5..2f07c2a3d3 100644
--- a/src/plugins/qmldesigner/designercore/include/model.h
+++ b/src/plugins/qmldesigner/designercore/include/model.h
@@ -76,7 +76,7 @@ public:
 
     ~Model() override;
 
-    static Model *create(TypeName type, int major = 1, int minor = 1, Model *metaInfoPropxyModel = 0);
+    static Model *create(TypeName type, int major = 1, int minor = 1, Model *metaInfoPropxyModel = nullptr);
 
     QUrl fileUrl() const;
     void setFileUrl(const QUrl &url);
diff --git a/src/plugins/qmldesigner/designercore/include/nodeinstanceview.h b/src/plugins/qmldesigner/designercore/include/nodeinstanceview.h
index b4dcb6075b..12f5430cd6 100644
--- a/src/plugins/qmldesigner/designercore/include/nodeinstanceview.h
+++ b/src/plugins/qmldesigner/designercore/include/nodeinstanceview.h
@@ -77,7 +77,7 @@ class QMLDESIGNERCORE_EXPORT NodeInstanceView : public AbstractView, public Node
 public:
     typedef QWeakPointer<NodeInstanceView> Pointer;
 
-    explicit NodeInstanceView(QObject *parent = 0, NodeInstanceServerInterface::RunModus runModus = NodeInstanceServerInterface::NormalModus);
+    explicit NodeInstanceView(QObject *parent = nullptr, NodeInstanceServerInterface::RunModus runModus = NodeInstanceServerInterface::NormalModus);
     ~NodeInstanceView() override;
 
     void modelAttached(Model *model) override;
diff --git a/src/plugins/qmldesigner/designercore/include/subcomponentmanager.h b/src/plugins/qmldesigner/designercore/include/subcomponentmanager.h
index 640b97e1aa..dc2f0732ee 100644
--- a/src/plugins/qmldesigner/designercore/include/subcomponentmanager.h
+++ b/src/plugins/qmldesigner/designercore/include/subcomponentmanager.h
@@ -45,7 +45,7 @@ class QMLDESIGNERCORE_EXPORT SubComponentManager : public QObject
 {
     Q_OBJECT
 public:
-    explicit SubComponentManager(Model *model, QObject *parent = 0);
+    explicit SubComponentManager(Model *model, QObject *parent = nullptr);
 
     void update(const QUrl &fileUrl, const QList<Import> &imports);
 
diff --git a/src/plugins/qmldesigner/designercore/instances/puppetdialog.h b/src/plugins/qmldesigner/designercore/instances/puppetdialog.h
index 4382745c24..500a1fab0c 100644
--- a/src/plugins/qmldesigner/designercore/instances/puppetdialog.h
+++ b/src/plugins/qmldesigner/designercore/instances/puppetdialog.h
@@ -39,7 +39,7 @@ class PuppetDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit PuppetDialog(QWidget *parent = 0);
+    explicit PuppetDialog(QWidget *parent = nullptr);
     ~PuppetDialog() override;
 
     void setDescription(const QString &description);
diff --git a/src/plugins/qmldesigner/designercore/pluginmanager/widgetpluginmanager.h b/src/plugins/qmldesigner/designercore/pluginmanager/widgetpluginmanager.h
index 31d94a17c5..2955ef9bfd 100644
--- a/src/plugins/qmldesigner/designercore/pluginmanager/widgetpluginmanager.h
+++ b/src/plugins/qmldesigner/designercore/pluginmanager/widgetpluginmanager.h
@@ -61,7 +61,7 @@ public:
 
     // Convenience to create a model for an "About Plugins"
     // dialog. Forces plugin initialization.
-    QAbstractItemModel *createModel(QObject *parent = 0);
+    QAbstractItemModel *createModel(QObject *parent = nullptr);
 
 private:
     PluginPathList m_paths;
diff --git a/src/plugins/qmldesigner/openuiqmlfiledialog.h b/src/plugins/qmldesigner/openuiqmlfiledialog.h
index c0daf1433c..25a9955299 100644
--- a/src/plugins/qmldesigner/openuiqmlfiledialog.h
+++ b/src/plugins/qmldesigner/openuiqmlfiledialog.h
@@ -38,7 +38,7 @@ class OpenUiQmlFileDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit OpenUiQmlFileDialog(QWidget *parent = 0);
+    explicit OpenUiQmlFileDialog(QWidget *parent = nullptr);
     ~OpenUiQmlFileDialog() override;
     bool uiFileOpened() const;
     void setUiQmlFiles(const QString &projectPath, const QStringList &stringList);
diff --git a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/addnewbackenddialog.h b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/addnewbackenddialog.h
index aff67ec49c..4cfa46d66e 100644
--- a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/addnewbackenddialog.h
+++ b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/addnewbackenddialog.h
@@ -40,7 +40,7 @@ class AddNewBackendDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit AddNewBackendDialog(QWidget *parent = 0);
+    explicit AddNewBackendDialog(QWidget *parent = nullptr);
     ~AddNewBackendDialog() override;
     void setupPossibleTypes(const QList<CppTypeData> &types);
     QString importString() const;
diff --git a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/bindingmodel.h b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/bindingmodel.h
index c6f5b03a15..480ba254ad 100644
--- a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/bindingmodel.h
+++ b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/bindingmodel.h
@@ -48,7 +48,7 @@ public:
         SourceModelNodeRow = 2,
         SourcePropertyNameRow = 3
     };
-    BindingModel(ConnectionView *parent = 0);
+    BindingModel(ConnectionView *parent = nullptr);
     void bindingChanged(const BindingProperty &bindingProperty);
     void bindingRemoved(const BindingProperty &bindingProperty);
     void selectionChanged(const QList<ModelNode> &selectedNodes);
diff --git a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionmodel.h b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionmodel.h
index e4000dc169..2c66b2ef25 100644
--- a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionmodel.h
+++ b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionmodel.h
@@ -47,7 +47,7 @@ public:
         TargetPropertyNameRow = 1,
         SourceRow = 2
     };
-    ConnectionModel(ConnectionView *parent = 0);
+    ConnectionModel(ConnectionView *parent = nullptr);
     void resetModel();
     SignalHandlerProperty signalHandlerPropertyForRow(int rowNumber) const;
     ConnectionView *connectionView() const;
diff --git a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionview.h b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionview.h
index c1c6cffbd6..da7623375a 100644
--- a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionview.h
+++ b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionview.h
@@ -50,7 +50,7 @@ class  ConnectionView : public AbstractView
     Q_OBJECT
 
 public:
-    ConnectionView(QObject *parent = 0);
+    ConnectionView(QObject *parent = nullptr);
     ~ConnectionView() override;
 
     // AbstractView
diff --git a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionviewwidget.h b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionviewwidget.h
index a7d8e2d793..2bcc3932c1 100644
--- a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionviewwidget.h
+++ b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/connectionviewwidget.h
@@ -59,7 +59,7 @@ public:
         InvalidTab
     };
 
-    explicit ConnectionViewWidget(QWidget *parent = 0);
+    explicit ConnectionViewWidget(QWidget *parent = nullptr);
     ~ConnectionViewWidget() override;
 
     void setBindingModel(BindingModel *model);
diff --git a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/delegates.h b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/delegates.h
index f77610cd3f..b9792293ac 100644
--- a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/delegates.h
+++ b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/delegates.h
@@ -38,7 +38,7 @@ class PropertiesComboBox : public QComboBox
     Q_OBJECT
     Q_PROPERTY(QString text READ text WRITE setText USER true)
 public:
-    PropertiesComboBox(QWidget *parent = 0);
+    PropertiesComboBox(QWidget *parent = nullptr);
 
     virtual QString text() const;
     void setText(const QString &text);
@@ -49,21 +49,21 @@ class ConnectionComboBox : public PropertiesComboBox
 {
     Q_OBJECT
 public:
-    ConnectionComboBox(QWidget *parent = 0);
+    ConnectionComboBox(QWidget *parent = nullptr);
     QString text() const override;
 };
 
 class ConnectionEditorDelegate : public QStyledItemDelegate
 {
 public:
-    ConnectionEditorDelegate(QWidget *parent = 0);
+    ConnectionEditorDelegate(QWidget *parent = nullptr);
     void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
 };
 
 class BindingDelegate : public ConnectionEditorDelegate
 {
 public:
-    BindingDelegate(QWidget *parent = 0);
+    BindingDelegate(QWidget *parent = nullptr);
     QWidget *createEditor(QWidget *parent,
                                     const QStyleOptionViewItem &option,
                                     const QModelIndex &index) const override;
@@ -72,7 +72,7 @@ public:
 class DynamicPropertiesDelegate : public ConnectionEditorDelegate
 {
 public:
-    DynamicPropertiesDelegate(QWidget *parent = 0);
+    DynamicPropertiesDelegate(QWidget *parent = nullptr);
     QWidget *createEditor(QWidget *parent,
                                     const QStyleOptionViewItem &option,
                                     const QModelIndex &index) const override;
@@ -83,7 +83,7 @@ class ConnectionDelegate : public ConnectionEditorDelegate
 {
     Q_OBJECT
 public:
-    ConnectionDelegate(QWidget *parent = 0);
+    ConnectionDelegate(QWidget *parent = nullptr);
     QWidget *createEditor(QWidget *parent,
                                     const QStyleOptionViewItem &option,
                                     const QModelIndex &index) const override;
@@ -93,7 +93,7 @@ class BackendDelegate : public ConnectionEditorDelegate
 {
     Q_OBJECT
 public:
-    BackendDelegate(QWidget *parent = 0);
+    BackendDelegate(QWidget *parent = nullptr);
     QWidget *createEditor(QWidget *parent,
                                   const QStyleOptionViewItem &option,
                                   const QModelIndex &index) const override;
diff --git a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/dynamicpropertiesmodel.h b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/dynamicpropertiesmodel.h
index 976fe754f9..e0c9617fed 100644
--- a/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/dynamicpropertiesmodel.h
+++ b/src/plugins/qmldesigner/qmldesignerextension/connectioneditor/dynamicpropertiesmodel.h
@@ -48,7 +48,7 @@ public:
         PropertyTypeRow = 2,
         PropertyValueRow = 3
     };
-    DynamicPropertiesModel(ConnectionView *parent = 0);
+    DynamicPropertiesModel(ConnectionView *parent = nullptr);
     void bindingPropertyChanged(const BindingProperty &bindingProperty);
     void variantPropertyChanged(const VariantProperty &variantProperty);
     void bindingRemoved(const BindingProperty &bindingProperty);
diff --git a/src/plugins/qmldesigner/settingspage.h b/src/plugins/qmldesigner/settingspage.h
index 9749c32e04..237b5d3107 100644
--- a/src/plugins/qmldesigner/settingspage.h
+++ b/src/plugins/qmldesigner/settingspage.h
@@ -47,7 +47,7 @@ class SettingsPageWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit SettingsPageWidget(QWidget *parent = 0);
+    explicit SettingsPageWidget(QWidget *parent = nullptr);
 
     DesignerSettings settings() const;
     void setSettings(const DesignerSettings &settings);
diff --git a/src/plugins/qmldesigner/switchsplittabwidget.h b/src/plugins/qmldesigner/switchsplittabwidget.h
index 10c048da5d..3bd19f393e 100644
--- a/src/plugins/qmldesigner/switchsplittabwidget.h
+++ b/src/plugins/qmldesigner/switchsplittabwidget.h
@@ -42,7 +42,7 @@ class SwitchSplitTabWidget : public QWidget
         TabMode
     };
 public:
-    explicit SwitchSplitTabWidget(QWidget *parent = 0);
+    explicit SwitchSplitTabWidget(QWidget *parent = nullptr);
     int count() const;
     QWidget *currentWidget() const;