+ /// Return the IO from the viewer presentation.
+ /// \param thePrs a selected object
+ /// \return an interactive object
+ virtual Handle(AIS_InteractiveObject) getIO(const std::shared_ptr<ModuleBase_ViewerPrs>& thePrs);
+
+protected:
+ /// Return a selectable object by the entity owner. It founds AIS object in the viewer
+ /// and returns the corresponded object
+ /// \param theOwner an entity owner
+ /// \return a found object or NULL
+ ObjectPtr getSelectableObject(const Handle(SelectMgr_EntityOwner)& theOwner) const;
+
+ /// Fills the list of presentations by objects selected in the viewer.
+ /// \param thePresentations an output list of presentation
+ void getSelectedInViewer(QList<std::shared_ptr<ModuleBase_ViewerPrs>>& thePresentations) const;
+
+ /// Fills the list of presentations by objects selected in the object browser.
+ /// ViewerPrs contains only object parameter not empty.
+ /// If the given list of presentations already has a viewer presentation with the same object
+ /// as selected in the browser, a new item is not appended to the list of presentations.
+ /// \param thePresentations an output list of presentation
+ void getSelectedInBrowser(QList<std::shared_ptr<ModuleBase_ViewerPrs>>& thePresentations) const;
+
+ /// Generates a vertex or edge by the give IO if it is an AIS created on trihedron
+ /// \param theIO a selected object
+ /// \return created shape or empty shape
+#ifdef BEFORE_TRIHEDRON_PATCH
+ TopoDS_Shape findAxisShape(Handle(AIS_InteractiveObject) theIO) const;
+#endif
+
+private:
+ XGUI_Workshop* myWorkshop; ///< current workshop