void scrollContentsBy(int dx, int dy) override;
void wheelEvent(QWheelEvent* event) override;
-private slots:
+private Q_SLOTS:
void slotScrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous);
void slotModelChanged(KItemModelBase* current, KItemModelBase* previous);
void slotViewChanged(KItemListView* current, KItemListView* previous);