+private:
+ /**
+ * Indicates when a view item is being hovered over.
+ * @param item The item that is being hovered over, or @c nullptr
+ * if no view item is being hovered over.
+ */
+ void item_hover(const std::shared_ptr<pv::view::ViewItem> &item);
+
+ /**
+ * Gets the first view item which has a hit-box that contains @c pt .
+ * @param pt the point to search with.
+ * @return the view item that has been found, or and empty
+ * @c shared_ptr if no item was found.
+ */
+ std::shared_ptr<pv::view::ViewItem> get_mouse_over_item(
+ const QPoint &pt);
+
+ /**
+ * Sets this item into the dragged state.
+ */
+ void drag();
+
+ /**
+ * Drag the background by the delta offset.
+ * @param delta the drag offset in pixels.
+ */
+ void drag_by(const QPoint &delta);
+
+ /**
+ * Sets this item into the un-dragged state.
+ */
+ void drag_release();
+
+ /**
+ * Gets the items in the view widget.
+ */
+ std::vector< std::shared_ptr<pv::view::ViewItem> > items();
+
+ /**
+ * Handles touch begin update and end events.
+ * @param e the event that triggered this handler.
+ */
+ bool touch_event(QTouchEvent *e);