override vs virtual or final [cppcoreguidelines-explicit-virtual-functions]

GUI/View/SampleDesigner/SampleListView.cpp

@@ -38,7 +38,7 @@ public:
 
 protected:
     void paint(QPainter* painter, const QStyleOptionViewItem& option,
-               const QModelIndex& index) const
+               const QModelIndex& index) const override
     {
         ItemDelegateForHTML::paint(painter, option, index);
 
@@ -53,7 +53,7 @@ protected:
         painter->restore();
     }
 
-    QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
+    QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const override
     {
         auto s = ItemDelegateForHTML::sizeHint(option, index);
         s.setHeight(std::max(s.height(), 32));

GUI/View/SampleDesigner/SampleToolBox.cpp

@@ -35,14 +35,14 @@ public:
     explicit FilterEdit(QWidget* parent = 0) : QLineEdit(parent) { setFocusPolicy(Qt::NoFocus); }
 
 protected:
-    virtual void mousePressEvent(QMouseEvent* event)
+    void mousePressEvent(QMouseEvent* event) override
     {
         if (!hasFocus()) // Explicitly focus on click.
             setFocus(Qt::OtherFocusReason);
         QLineEdit::mousePressEvent(event);
     }
 
-    virtual void focusInEvent(QFocusEvent* e)
+    virtual void focusInEvent(QFocusEvent* e) override
     {
         // Refuse the focus if the mouse it outside. In addition to the mouse
         // press logic, this prevents a re-focussing which occurs once

GUI/View/SampleDesigner/SampleToolBoxGroupView.cpp

@@ -43,9 +43,9 @@ public:
     };
 
     // QAbstractListModel
-    virtual QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
-    virtual int rowCount(const QModelIndex& parent = QModelIndex()) const override;
-    virtual Qt::ItemFlags flags(const QModelIndex& index) const override;
+    QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
+    int rowCount(const QModelIndex& parent = QModelIndex()) const override;
+    Qt::ItemFlags flags(const QModelIndex& index) const override;
 
     // The model returns no text in icon mode, so, it also needs to know the view mode
     void setViewMode(QListView::ViewMode viewMode);

GUI/View/SampleDesigner/SampleToolBoxTreeWidget.cpp

@@ -34,8 +34,8 @@ class GroupTitleDelegate : public QItemDelegate {
 public:
     GroupTitleDelegate(QTreeView* view, QWidget* parent) : QItemDelegate(parent), m_view(view) {}
 
-    virtual void paint(QPainter* painter, const QStyleOptionViewItem& option,
-                       const QModelIndex& index) const override
+    void paint(QPainter* painter, const QStyleOptionViewItem& option,
+               const QModelIndex& index) const override
     {
         const QAbstractItemModel* model = index.model();
         const bool isGroupTitleItem = !model->parent(index).isValid();