Add missing override

Pick-to: 5.15
Change-Id: Iba896b0af174ed28a27413d7343427cf9b4600d3
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

39 files changed, 104 insertions, 103 deletions

diff --git a/src/controls/Private/qquickrangemodel_p.h b/src/controls/Private/qquickrangemodel_p.h
index e5796725..6fb2c525 100644
--- a/src/controls/Private/qquickrangemodel_p.h
+++ b/src/controls/Private/qquickrangemodel_p.h
@@ -92,8 +92,8 @@ public:
     Q_INVOKABLE qreal valueForPosition(qreal position) const;
     Q_INVOKABLE qreal positionForValue(qreal value) const;
 
-    void classBegin();
-    void componentComplete();
+    void classBegin() override;
+    void componentComplete() override;
 
 public Q_SLOTS:
     void toMinimum();
diff --git a/src/controls/Private/qquickspinboxvalidator_p.h b/src/controls/Private/qquickspinboxvalidator_p.h
index baaeb1b3..4b92ead3 100644
--- a/src/controls/Private/qquickspinboxvalidator_p.h
+++ b/src/controls/Private/qquickspinboxvalidator_p.h
@@ -87,11 +87,11 @@ public:
     QString suffix() const;
     void setSuffix(const QString &suffix);
 
-    void fixup(QString &input) const;
-    State validate(QString &input, int &pos) const;
+    void fixup(QString &input) const override;
+    State validate(QString &input, int &pos) const override;
 
-    void classBegin() { }
-    void componentComplete();
+    void classBegin() override { }
+    void componentComplete() override;
 
 public Q_SLOTS:
     void increment();
diff --git a/src/controls/Private/qquickstyleitem_p.h b/src/controls/Private/qquickstyleitem_p.h
index 19cc15cf..38af22f2 100644
--- a/src/controls/Private/qquickstyleitem_p.h
+++ b/src/controls/Private/qquickstyleitem_p.h
@@ -55,7 +55,7 @@ class QQuickTableRowImageProvider1 : public QQuickImageProvider
 public:
     QQuickTableRowImageProvider1()
         : QQuickImageProvider(QQuickImageProvider::Pixmap) {}
-    QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize);
+    QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize) override;
 };
 
 class QQuickStyleItem1: public QQuickItem
@@ -245,9 +245,10 @@ Q_SIGNALS:
     void textureHeightChanged(int h);
 
 protected:
-    virtual bool event(QEvent *);
-    virtual QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *);
-    virtual void updatePolish();
+    bool event(QEvent *)
+ override;
+    QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *) override;
+    void updatePolish() override;
 
 private:
     QSize sizeFromContents(int width, int height);
diff --git a/src/controls/Private/qquicktreemodeladaptor_p.h b/src/controls/Private/qquicktreemodeladaptor_p.h
index 6e926db2..9a272936 100644
--- a/src/controls/Private/qquicktreemodeladaptor_p.h
+++ b/src/controls/Private/qquicktreemodeladaptor_p.h
@@ -84,10 +84,10 @@ public:
         ModelIndexRole
     };
 
-    QHash<int, QByteArray> roleNames() const;
-    int rowCount(const QModelIndex &parent = QModelIndex()) const;
-    QVariant data(const QModelIndex &, int role) const;
-    bool setData(const QModelIndex &index, const QVariant &value, int role);
+    QHash<int, QByteArray> roleNames() const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &, int role) const override;
+    bool setData(const QModelIndex &index, const QVariant &value, int role) override;
 
     void clearModelData();
 
diff --git a/src/controls/Private/qquickwheelarea_p.h b/src/controls/Private/qquickwheelarea_p.h
index a11b78cf..6e7232d7 100644
--- a/src/controls/Private/qquickwheelarea_p.h
+++ b/src/controls/Private/qquickwheelarea_p.h
@@ -96,7 +96,7 @@ public:
     bool isInverted() const;
 
 #ifndef QT_NO_WHEELEVENT
-    void wheelEvent(QWheelEvent *event);
+    void wheelEvent(QWheelEvent *event) override;
 #endif
 
     bool isAtXEnd() const;
diff --git a/src/controls/plugin.h b/src/controls/plugin.h
index 04fd0685..30ff5df9 100644
--- a/src/controls/plugin.h
+++ b/src/controls/plugin.h
@@ -56,8 +56,8 @@ class QtQuickControls1Plugin: public QQmlExtensionPlugin
     Q_PLUGIN_METADATA(IID QQmlExtensionInterface_iid)
 public:
     QtQuickControls1Plugin(QObject *parent = 0);
-    void registerTypes(const char *uri);
-    void initializeEngine(QQmlEngine *engine, const char *uri);
+    void registerTypes(const char *uri) override;
+    void initializeEngine(QQmlEngine *engine, const char *uri) override;
 private:
     QString fileLocation() const;
     bool isLoadedFromResource() const;
diff --git a/src/controls/qquickaction_p.h b/src/controls/qquickaction_p.h
index 8d6757b5..5c44f89a 100644
--- a/src/controls/qquickaction_p.h
+++ b/src/controls/qquickaction_p.h
@@ -111,7 +111,7 @@ public:
     QVariant iconVariant() const { return QVariant(m_icon); }
     void setIcon(const QIcon &icon) { m_icon = icon; emit iconChanged(); }
 
-    bool event(QEvent *e);
+    bool event(QEvent *e) override;
 
 public Q_SLOTS:
     void trigger(QObject *source = 0);
diff --git a/src/controls/qquickdesktopiconprovider_p.h b/src/controls/qquickdesktopiconprovider_p.h
index 6e9e94a0..51448cda 100644
--- a/src/controls/qquickdesktopiconprovider_p.h
+++ b/src/controls/qquickdesktopiconprovider_p.h
@@ -54,7 +54,7 @@ public:
     {
     }
 
-    QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize)
+    QPixmap requestPixmap(const QString &id, QSize *size, const QSize &requestedSize) override
     {
         Q_UNUSED(requestedSize);
         Q_UNUSED(size);
diff --git a/src/controls/qquickmenu_p.h b/src/controls/qquickmenu_p.h
index 762774a7..6a159832 100644
--- a/src/controls/qquickmenu_p.h
+++ b/src/controls/qquickmenu_p.h
@@ -120,8 +120,8 @@ public:
     QQuickMenu1(QObject *parent = 0);
     virtual ~QQuickMenu1();
 
-    void setVisible(bool);
-    void setEnabled(bool);
+    void setVisible(bool) override;
+    void setEnabled(bool) override;
 
     int selectedIndex() const { return m_selectedIndex; }
     void setSelectedIndex(int index);
@@ -147,7 +147,7 @@ public:
     QQuickItem *menuContentItem() const { return m_menuContentItem; }
     bool popupVisible() const { return m_popupVisible; }
 
-    bool isNative() { return m_platformMenu != 0; }
+    bool isNative() override { return m_platformMenu != 0; }
 
     QRect popupGeometry() const;
 
@@ -169,7 +169,7 @@ protected Q_SLOTS:
     void hideMenu();
     void clearPopupWindow();
 
-    void updateText();
+    void updateText() override;
     void windowVisibleChanged(bool);
     void platformMenuWindowVisibleChanged(bool);
 
diff --git a/src/controls/qquickmenuitem_p.h b/src/controls/qquickmenuitem_p.h
index f28fafd9..f56ef037 100644
--- a/src/controls/qquickmenuitem_p.h
+++ b/src/controls/qquickmenuitem_p.h
@@ -202,12 +202,12 @@ public:
     QQuickMenuItem1(QObject *parent = 0);
     ~QQuickMenuItem1();
 
-    void setEnabled(bool enabled);
+    void setEnabled(bool enabled) override;
 
-    QString text() const;
+    QString text() const override;
 
-    QUrl iconSource() const;
-    QString iconName() const;
+    QUrl iconSource() const override;
+    QString iconName() const override;
 
     QQuickAction1 *boundAction() { return m_boundAction; }
     void setBoundAction(QQuickAction1 *a);
@@ -224,7 +224,7 @@ public:
     QQuickExclusiveGroup1 *exclusiveGroup() const;
     void setExclusiveGroup(QQuickExclusiveGroup1 *);
 
-    void setParentMenu(QQuickMenu1 *parentMenu);
+    void setParentMenu(QQuickMenu1 *parentMenu) override;
 
 protected Q_SLOTS:
     void updateShortcut();
@@ -234,8 +234,8 @@ protected Q_SLOTS:
     void unbindFromAction(QObject *action);
 
 protected:
-    QIcon icon() const;
-    QQuickAction1 *action() const;
+    QIcon icon() const override;
+    QQuickAction1 *action() const override;
 
 private:
     QQuickAction1 *m_boundAction;
diff --git a/src/controls/qquickmenuitemcontainer_p.h b/src/controls/qquickmenuitemcontainer_p.h
index d0a2b560..c09fb3f5 100644
--- a/src/controls/qquickmenuitemcontainer_p.h
+++ b/src/controls/qquickmenuitemcontainer_p.h
@@ -59,7 +59,7 @@ public:
         setParentMenu(0);
     }
 
-    void setParentMenu(QQuickMenu1 *parentMenu)
+    void setParentMenu(QQuickMenu1 *parentMenu) override
     {
         QQuickMenuBase1::setParentMenu(parentMenu);
         for (QQuickMenuBase1 *item : qAsConst(m_menuItems))
diff --git a/src/controls/qquickmenupopupwindow_p.h b/src/controls/qquickmenupopupwindow_p.h
index 8ec6aa5c..15cc5b82 100644
--- a/src/controls/qquickmenupopupwindow_p.h
+++ b/src/controls/qquickmenupopupwindow_p.h
@@ -57,7 +57,7 @@ public:
     void setParentWindow(QWindow *effectiveParentWindow, QQuickWindow *parentWindow);
     void setGeometry(int posx, int posy, int w, int h);
 
-    void setParentItem(QQuickItem *);
+    void setParentItem(QQuickItem *) override;
 
     QQuickMenu1 *menu() const;
 public Q_SLOTS:
@@ -71,9 +71,9 @@ Q_SIGNALS:
     void willBeDeletedLater();
 
 protected:
-    void focusInEvent(QFocusEvent *);
-    void exposeEvent(QExposeEvent *);
-    bool shouldForwardEventAfterDismiss(QMouseEvent *) const;
+    void focusInEvent(QFocusEvent *) override;
+    void exposeEvent(QExposeEvent *) override;
+    bool shouldForwardEventAfterDismiss(QMouseEvent *) const override;
 
 private:
     QQuickItem *m_itemAt;
diff --git a/src/dialogs/Private/dialogsprivateplugin.cpp b/src/dialogs/Private/dialogsprivateplugin.cpp
index a785f388..bee329ee 100644
--- a/src/dialogs/Private/dialogsprivateplugin.cpp
+++ b/src/dialogs/Private/dialogsprivateplugin.cpp
@@ -51,7 +51,7 @@ class QtQuick2DialogsPrivatePlugin : public QQmlExtensionPlugin
 
 public:
     QtQuick2DialogsPrivatePlugin(QObject *parent = 0) : QQmlExtensionPlugin(parent) { }
-    virtual void registerTypes(const char *uri)
+    void registerTypes(const char *uri) override
     {
         Q_ASSERT(QLatin1String(uri) == QLatin1String("QtQuick.Dialogs.Private"));
 
diff --git a/src/dialogs/Private/qquickfontlistmodel_p.h b/src/dialogs/Private/qquickfontlistmodel_p.h
index 73270e12..5792a658 100644
--- a/src/dialogs/Private/qquickfontlistmodel_p.h
+++ b/src/dialogs/Private/qquickfontlistmodel_p.h
@@ -73,10 +73,10 @@ public:
         FontFamilyRole = Qt::UserRole + 1
     };
 
-    virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
-    virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
-    virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
-    virtual QHash<int, QByteArray> roleNames() const;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    QHash<int, QByteArray> roleNames() const override;
 
     int count() const { return rowCount(QModelIndex()); }
 
@@ -91,8 +91,8 @@ public:
     Q_INVOKABLE QJSValue get(int index) const;
     Q_INVOKABLE QJSValue pointSizes();
 
-    virtual void classBegin();
-    virtual void componentComplete();
+    void classBegin() override;
+    void componentComplete() override;
 
 public Q_SLOTS:
     void setScalableFonts(bool arg);
diff --git a/src/dialogs/Private/qquickwritingsystemlistmodel_p.h b/src/dialogs/Private/qquickwritingsystemlistmodel_p.h
index 8ece6586..407f84eb 100644
--- a/src/dialogs/Private/qquickwritingsystemlistmodel_p.h
+++ b/src/dialogs/Private/qquickwritingsystemlistmodel_p.h
@@ -68,10 +68,10 @@ public:
         WritingSystemSampleRole = Qt::UserRole + 2
     };
 
-    virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
-    virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
-    virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
-    virtual QHash<int, QByteArray> roleNames() const;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    QHash<int, QByteArray> roleNames() const override;
 
     int count() const { return rowCount(QModelIndex()); }
 
@@ -79,8 +79,8 @@ public:
 
     Q_INVOKABLE QJSValue get(int index) const;
 
-    virtual void classBegin();
-    virtual void componentComplete();
+    void classBegin() override;
+    void componentComplete() override;
 
 Q_SIGNALS:
     void writingSystemsChanged();
diff --git a/src/dialogs/plugin.cpp b/src/dialogs/plugin.cpp
index 68b4cf3b..9470c208 100644
--- a/src/dialogs/plugin.cpp
+++ b/src/dialogs/plugin.cpp
@@ -88,7 +88,7 @@ class QtQuick2DialogsPlugin : public QQmlExtensionPlugin
 public:
     QtQuick2DialogsPlugin() : QQmlExtensionPlugin(), m_useResources(true) { }
 
-    virtual void registerTypes(const char *uri) {
+    void registerTypes(const char *uri) override {
         Q_ASSERT(QLatin1String(uri) == QLatin1String("QtQuick.Dialogs"));
         bool hasTopLevelWindows = QGuiApplicationPrivate::platformIntegration()->
             hasCapability(QPlatformIntegration::MultipleWindows);
diff --git a/src/dialogs/qquickabstractcolordialog_p.h b/src/dialogs/qquickabstractcolordialog_p.h
index 16b39c26..e65c2556 100644
--- a/src/dialogs/qquickabstractcolordialog_p.h
+++ b/src/dialogs/qquickabstractcolordialog_p.h
@@ -73,7 +73,7 @@ public:
     QQuickAbstractColorDialog(QObject *parent = 0);
     virtual ~QQuickAbstractColorDialog();
 
-    virtual QString title() const;
+    QString title() const override;
     bool showAlphaChannel() const;
     QColor color() const { return m_color; }
     QColor currentColor() const { return m_currentColor; }
@@ -83,9 +83,9 @@ public:
     qreal currentAlpha() const { return m_currentColor.alphaF(); }
 
 public Q_SLOTS:
-    void setVisible(bool v);
-    void setModality(Qt::WindowModality m);
-    void setTitle(const QString &t);
+    void setVisible(bool v) override;
+    void setModality(Qt::WindowModality m) override;
+    void setTitle(const QString &t) override;
     void setColor(QColor arg);
     void setCurrentColor(QColor currentColor);
     void setShowAlphaChannel(bool arg);
@@ -97,7 +97,7 @@ Q_SIGNALS:
     void selectionAccepted();
 
 protected Q_SLOTS:
-    virtual void accept();
+    void accept() override;
 
 protected:
     QPlatformColorDialogHelper *m_dlgHelper;
diff --git a/src/dialogs/qquickabstractfiledialog_p.h b/src/dialogs/qquickabstractfiledialog_p.h
index e00db5be..ba62c04d 100644
--- a/src/dialogs/qquickabstractfiledialog_p.h
+++ b/src/dialogs/qquickabstractfiledialog_p.h
@@ -82,7 +82,7 @@ public:
     QQuickAbstractFileDialog(QObject *parent = 0);
     virtual ~QQuickAbstractFileDialog();
 
-    virtual QString title() const;
+    QString title() const override;
     bool selectExisting() const { return m_selectExisting; }
     bool selectMultiple() const { return m_selectMultiple; }
     bool selectFolder() const { return m_selectFolder; }
@@ -99,8 +99,8 @@ public:
     QString defaultSuffix() const { return m_options->defaultSuffix(); }
 
 public Q_SLOTS:
-    void setVisible(bool v);
-    void setTitle(const QString &t);
+    void setVisible(bool v) override;
+    void setTitle(const QString &t) override;
     void setSelectExisting(bool s);
     void setSelectMultiple(bool s);
     void setSelectFolder(bool s);
diff --git a/src/dialogs/qquickabstractfontdialog_p.h b/src/dialogs/qquickabstractfontdialog_p.h
index f60c4ddb..b9c0380d 100644
--- a/src/dialogs/qquickabstractfontdialog_p.h
+++ b/src/dialogs/qquickabstractfontdialog_p.h
@@ -73,7 +73,7 @@ public:
     QQuickAbstractFontDialog(QObject *parent = 0);
     virtual ~QQuickAbstractFontDialog();
 
-    virtual QString title() const;
+    QString title() const override;
     bool scalableFonts() const;
     bool nonScalableFonts() const;
     bool monospacedFonts() const;
@@ -82,9 +82,9 @@ public:
     QFont currentFont() const { return m_currentFont; }
 
 public Q_SLOTS:
-    void setVisible(bool v);
-    void setModality(Qt::WindowModality m);
-    void setTitle(const QString &t);
+    void setVisible(bool v) override;
+    void setModality(Qt::WindowModality m) override;
+    void setTitle(const QString &t) override;
     void setFont(const QFont &arg);
     void setCurrentFont(const QFont &arg);
     void setScalableFonts(bool arg);
@@ -102,7 +102,7 @@ Q_SIGNALS:
     void selectionAccepted();
 
 protected Q_SLOTS:
-    virtual void accept();
+    void accept() override;
 
 protected:
     QPlatformFontDialogHelper *m_dlgHelper;
diff --git a/src/dialogs/qquickabstractmessagedialog_p.h b/src/dialogs/qquickabstractmessagedialog_p.h
index 68d0c51e..e4bfa631 100644
--- a/src/dialogs/qquickabstractmessagedialog_p.h
+++ b/src/dialogs/qquickabstractmessagedialog_p.h
@@ -76,7 +76,7 @@ public:
     QQuickAbstractMessageDialog(QObject *parent = 0);
     virtual ~QQuickAbstractMessageDialog();
 
-    virtual QString title() const { return m_options->windowTitle(); }
+    QString title() const override { return m_options->windowTitle(); }
     QString text() const { return m_options->text(); }
     QString informativeText() const { return m_options->informativeText(); }
     QString detailedText() const { return m_options->detailedText(); }
@@ -98,8 +98,8 @@ public:
     StandardButton clickedButton() const { return m_clickedButton; }
 
 public Q_SLOTS:
-    virtual void setVisible(bool v);
-    virtual void setTitle(const QString &arg);
+    void setVisible(bool v) override;
+    void setTitle(const QString &arg) override;
     void setText(const QString &arg);
     void setInformativeText(const QString &arg);
     void setDetailedText(const QString &arg);
diff --git a/src/dialogs/qquickcolordialog_p.h b/src/dialogs/qquickcolordialog_p.h
index 2e252b39..59d2330d 100644
--- a/src/dialogs/qquickcolordialog_p.h
+++ b/src/dialogs/qquickcolordialog_p.h
@@ -68,7 +68,7 @@ public:
     ~QQuickColorDialog();
 
 protected:
-    virtual QPlatformColorDialogHelper *helper() { return 0; }
+    QPlatformColorDialogHelper *helper() override { return 0; }
 
     Q_DISABLE_COPY(QQuickColorDialog)
 };
diff --git a/src/dialogs/qquickdialog_p.h b/src/dialogs/qquickdialog_p.h
index 53a8707b..cb5e1fc9 100644
--- a/src/dialogs/qquickdialog_p.h
+++ b/src/dialogs/qquickdialog_p.h
@@ -80,11 +80,11 @@ public:
     Q_INVOKABLE QJSValue __standardButtonsLeftModel();
     Q_INVOKABLE QJSValue __standardButtonsRightModel();
 
-    QString title() const { return m_title; }
-    virtual void setVisible(bool v);
+    QString title() const override { return m_title; }
+    void setVisible(bool v) override;
 
 public Q_SLOTS:
-    virtual void setTitle(const QString &arg);
+    void setTitle(const QString &arg) override;
     void setStandardButtons(StandardButtons buttons);
     void click(QQuickAbstractDialog::StandardButton button);
 
@@ -100,12 +100,12 @@ Q_SIGNALS:
     void reset();
 
 protected:
-    virtual QPlatformDialogHelper *helper() { return 0; }
+    QPlatformDialogHelper *helper() override { return 0; }
     void click(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole);
 
 protected Q_SLOTS:
-    virtual void accept();
-    virtual void reject();
+    void accept() override;
+    void reject() override;
 
 private:
     void updateStandardButtons();
diff --git a/src/dialogs/qquickfontdialog_p.h b/src/dialogs/qquickfontdialog_p.h
index 3c2089d6..e87e60c7 100644
--- a/src/dialogs/qquickfontdialog_p.h
+++ b/src/dialogs/qquickfontdialog_p.h
@@ -68,7 +68,7 @@ public:
     ~QQuickFontDialog();
 
 protected:
-    virtual QPlatformFontDialogHelper *helper() { return 0; }
+    QPlatformFontDialogHelper *helper() override { return 0; }
 
     Q_DISABLE_COPY(QQuickFontDialog)
 };
diff --git a/src/dialogs/qquickmessagedialog_p.h b/src/dialogs/qquickmessagedialog_p.h
index c4af85be..a5b06e34 100644
--- a/src/dialogs/qquickmessagedialog_p.h
+++ b/src/dialogs/qquickmessagedialog_p.h
@@ -68,11 +68,11 @@ public:
     ~QQuickMessageDialog();
 
 protected:
-    virtual QPlatformDialogHelper *helper() { return 0; }
+    QPlatformDialogHelper *helper() override { return 0; }
 
 protected Q_SLOTS:
-    virtual void accept();
-    virtual void reject();
+    void accept() override;
+    void reject() override;
 
 private:
     Q_DISABLE_COPY(QQuickMessageDialog)
diff --git a/src/dialogs/qquickplatformcolordialog_p.h b/src/dialogs/qquickplatformcolordialog_p.h
index d4d79d42..625affcb 100644
--- a/src/dialogs/qquickplatformcolordialog_p.h
+++ b/src/dialogs/qquickplatformcolordialog_p.h
@@ -64,7 +64,7 @@ public:
     virtual ~QQuickPlatformColorDialog1();
 
 protected:
-    QPlatformColorDialogHelper *helper();
+    QPlatformColorDialogHelper *helper() override;
 
     Q_DISABLE_COPY(QQuickPlatformColorDialog1)
 };
diff --git a/src/dialogs/qquickplatformfontdialog_p.h b/src/dialogs/qquickplatformfontdialog_p.h
index 096f26b2..8fb97158 100644
--- a/src/dialogs/qquickplatformfontdialog_p.h
+++ b/src/dialogs/qquickplatformfontdialog_p.h
@@ -64,7 +64,7 @@ public:
     virtual ~QQuickPlatformFontDialog1();
 
 protected:
-    QPlatformFontDialogHelper *helper();
+    QPlatformFontDialogHelper *helper() override;
 
     Q_DISABLE_COPY(QQuickPlatformFontDialog1)
 };
diff --git a/src/dialogs/qquickplatformmessagedialog_p.h b/src/dialogs/qquickplatformmessagedialog_p.h
index 045dabd0..2a2f3d9b 100644
--- a/src/dialogs/qquickplatformmessagedialog_p.h
+++ b/src/dialogs/qquickplatformmessagedialog_p.h
@@ -64,7 +64,7 @@ public:
     virtual ~QQuickPlatformMessageDialog1();
 
 protected:
-    QPlatformMessageDialogHelper *helper();
+    QPlatformMessageDialogHelper *helper() override;
 
     Q_DISABLE_COPY(QQuickPlatformMessageDialog1)
 };
diff --git a/src/extras/Private/qquickcircularprogressbar_p.h b/src/extras/Private/qquickcircularprogressbar_p.h
index 5448d159..e2d77268 100644
--- a/src/extras/Private/qquickcircularprogressbar_p.h
+++ b/src/extras/Private/qquickcircularprogressbar_p.h
@@ -59,7 +59,7 @@ public:
     QQuickCircularProgressBar(QQuickItem *parent = 0);
     ~QQuickCircularProgressBar();
 
-    void paint(QPainter *painter);
+    void paint(QPainter *painter) override;
 
     qreal progress() const;
     void setProgress(qreal progress);
diff --git a/src/extras/Private/qquickflatprogressbar_p.h b/src/extras/Private/qquickflatprogressbar_p.h
index 8630561c..8b0bfffc 100644
--- a/src/extras/Private/qquickflatprogressbar_p.h
+++ b/src/extras/Private/qquickflatprogressbar_p.h
@@ -53,7 +53,7 @@ class QQuickFlatProgressBar : public QQuickPaintedItem
 public:
     explicit QQuickFlatProgressBar(QQuickItem *parent = 0);
 
-    void paint(QPainter *painter);
+    void paint(QPainter *painter) override;
 
     qreal stripeOffset() const;
     void setStripeOffset(qreal stripeOffset);
diff --git a/src/extras/Private/qquickmousethief_p.h b/src/extras/Private/qquickmousethief_p.h
index 6f289ff6..2622ecb0 100644
--- a/src/extras/Private/qquickmousethief_p.h
+++ b/src/extras/Private/qquickmousethief_p.h
@@ -74,7 +74,7 @@ signals:
 
     void handledEventChanged();
 protected:
-    bool eventFilter(QObject *obj, QEvent *event);
+    bool eventFilter(QObject *obj, QEvent *event) override;
 private slots:
     void itemWindowChanged(QQuickWindow *window);
 private:
diff --git a/src/extras/Styles/Flat/flatstyleplugin.h b/src/extras/Styles/Flat/flatstyleplugin.h
index 80261e14..61eef5d5 100644
--- a/src/extras/Styles/Flat/flatstyleplugin.h
+++ b/src/extras/Styles/Flat/flatstyleplugin.h
@@ -53,7 +53,7 @@ class QtQuickExtrasStylesPlugin : public QQmlExtensionPlugin
 public:
     explicit QtQuickExtrasStylesPlugin(QObject *parent = 0);
 
-    void registerTypes(const char *uri);
+    void registerTypes(const char *uri) override;
 };
 
 QT_END_NAMESPACE
diff --git a/src/extras/plugin.h b/src/extras/plugin.h
index 5f0a380e..11fcaf9b 100644
--- a/src/extras/plugin.h
+++ b/src/extras/plugin.h
@@ -53,7 +53,7 @@ class QtQuickExtrasPlugin : public QQmlExtensionPlugin
 public:
     explicit QtQuickExtrasPlugin(QObject *parent = 0);
 
-    void registerTypes(const char *uri);
+    void registerTypes(const char *uri) override;
 };
 
 QT_END_NAMESPACE
diff --git a/src/widgets/qmessageboxhelper_p.h b/src/widgets/qmessageboxhelper_p.h
index cdc4b9e2..5aeb7230 100644
--- a/src/widgets/qmessageboxhelper_p.h
+++ b/src/widgets/qmessageboxhelper_p.h
@@ -61,12 +61,12 @@ class QCloseableMessageBox : public QMessageBox
 public:
     QCloseableMessageBox(QWidget *parent = 0) : QMessageBox(parent) { }
 
-    void closeEvent(QCloseEvent *e) {
+    void closeEvent(QCloseEvent *e) override {
         // QTBUG-36227: Bypass QMessageBox::closeEvent()
         QDialog::closeEvent(e);
     }
 
-    void keyPressEvent(QKeyEvent *e) {
+    void keyPressEvent(QKeyEvent *e) override {
         QMessageBox::keyPressEvent(e);
         // QTBUG-36227: reject on escape or cmd-period even if there's no cancel button
         if ((isVisible() && e->key() == Qt::Key_Escape)
@@ -88,9 +88,9 @@ public:
         connect(&m_dialog, SIGNAL(buttonClicked(QAbstractButton*)), this, SLOT(buttonClicked(QAbstractButton*)));
     }
 
-    virtual void exec() { m_dialog.exec(); }
+    void exec() override { m_dialog.exec(); }
 
-    virtual bool show(Qt::WindowFlags f, Qt::WindowModality m, QWindow *parent) {
+    bool show(Qt::WindowFlags f, Qt::WindowModality m, QWindow *parent) override {
         m_dialog.winId();
         QWindow *window = m_dialog.windowHandle();
         Q_ASSERT(window);
@@ -113,7 +113,7 @@ public:
         return m_dialog.isVisible();
     }
 
-    virtual void hide() { m_dialog.hide(); }
+    void hide() override { m_dialog.hide(); }
 
     QCloseableMessageBox m_dialog;
 
diff --git a/src/widgets/qquickqcolordialog.cpp b/src/widgets/qquickqcolordialog.cpp
index 609c023f..996c0708 100644
--- a/src/widgets/qquickqcolordialog.cpp
+++ b/src/widgets/qquickqcolordialog.cpp
@@ -60,12 +60,12 @@ public:
         connect(&m_dialog, SIGNAL(rejected()), this, SIGNAL(reject()));
     }
 
-    virtual void setCurrentColor(const QColor &c) { m_dialog.setCurrentColor(c); }
-    virtual QColor currentColor() const { return m_dialog.currentColor(); }
+    void setCurrentColor(const QColor &c) override { m_dialog.setCurrentColor(c); }
+    QColor currentColor() const override { return m_dialog.currentColor(); }
 
-    virtual void exec() { m_dialog.exec(); }
+    void exec() override { m_dialog.exec(); }
 
-    virtual bool show(Qt::WindowFlags f, Qt::WindowModality m, QWindow *parent) {
+    bool show(Qt::WindowFlags f, Qt::WindowModality m, QWindow *parent) override {
         m_dialog.winId();
         QWindow *window = m_dialog.windowHandle();
         Q_ASSERT(window);
@@ -78,7 +78,7 @@ public:
         return m_dialog.isVisible();
     }
 
-    virtual void hide() { m_dialog.hide(); }
+    void hide() override { m_dialog.hide(); }
 
 private:
     QColorDialog m_dialog;
diff --git a/src/widgets/qquickqcolordialog_p.h b/src/widgets/qquickqcolordialog_p.h
index 94804c13..91abf84c 100644
--- a/src/widgets/qquickqcolordialog_p.h
+++ b/src/widgets/qquickqcolordialog_p.h
@@ -64,7 +64,7 @@ public:
     virtual ~QQuickQColorDialog();
 
 protected:
-    QPlatformColorDialogHelper *helper();
+    QPlatformColorDialogHelper *helper() override;
 
     Q_DISABLE_COPY(QQuickQColorDialog)
 };
diff --git a/src/widgets/qquickqfontdialog.cpp b/src/widgets/qquickqfontdialog.cpp
index bc730a94..505fdc8a 100644
--- a/src/widgets/qquickqfontdialog.cpp
+++ b/src/widgets/qquickqfontdialog.cpp
@@ -60,12 +60,12 @@ public:
         connect(&m_dialog, SIGNAL(rejected()), this, SIGNAL(reject()));
     }
 
-    virtual void setCurrentFont(const QFont &font) { m_dialog.setCurrentFont(font); }
-    virtual QFont currentFont() const { return m_dialog.currentFont(); }
+    void setCurrentFont(const QFont &font) override { m_dialog.setCurrentFont(font); }
+    QFont currentFont() const override { return m_dialog.currentFont(); }
 
-    virtual void exec() { m_dialog.exec(); }
+    void exec() override { m_dialog.exec(); }
 
-    virtual bool show(Qt::WindowFlags f, Qt::WindowModality m, QWindow *parent) {
+    bool show(Qt::WindowFlags f, Qt::WindowModality m, QWindow *parent) override {
         m_dialog.winId();
         QWindow *window = m_dialog.windowHandle();
         Q_ASSERT(window);
@@ -80,7 +80,7 @@ public:
         return m_dialog.isVisible();
     }
 
-    virtual void hide() { m_dialog.hide(); }
+    void hide() override { m_dialog.hide(); }
 
 private:
     QFontDialog m_dialog;
diff --git a/src/widgets/qquickqfontdialog_p.h b/src/widgets/qquickqfontdialog_p.h
index a320299d..4d1b336a 100644
--- a/src/widgets/qquickqfontdialog_p.h
+++ b/src/widgets/qquickqfontdialog_p.h
@@ -64,7 +64,7 @@ public:
     virtual ~QQuickQFontDialog();
 
 protected:
-    QPlatformFontDialogHelper *helper();
+    QPlatformFontDialogHelper *helper() override;
 
     Q_DISABLE_COPY(QQuickQFontDialog)
 };
diff --git a/src/widgets/qquickqmessagebox_p.h b/src/widgets/qquickqmessagebox_p.h
index 0972b149..4ff7c0af 100644
--- a/src/widgets/qquickqmessagebox_p.h
+++ b/src/widgets/qquickqmessagebox_p.h
@@ -62,7 +62,7 @@ public:
     virtual ~QQuickQMessageBox();
 
 protected:
-    virtual QPlatformDialogHelper *helper();
+    QPlatformDialogHelper *helper() override;
 
 protected:
     Q_DISABLE_COPY(QQuickQMessageBox)
diff --git a/src/widgets/widgetsplugin.cpp b/src/widgets/widgetsplugin.cpp
index 6617319b..b307c7e9 100644
--- a/src/widgets/widgetsplugin.cpp
+++ b/src/widgets/widgetsplugin.cpp
@@ -81,7 +81,7 @@ class QtQuick2PrivateWidgetsPlugin : public QQmlExtensionPlugin
 
 public:
     QtQuick2PrivateWidgetsPlugin(QObject *parent = 0) : QQmlExtensionPlugin(parent) { }
-    virtual void registerTypes(const char *uri)
+    void registerTypes(const char *uri) override
     {
         Q_ASSERT(QLatin1String(uri) == QLatin1String("QtQuick.PrivateWidgets"));
 #if QT_CONFIG(messagebox)