+protected:
+ /// Checks the widget validity. By default, it returns true.
+ /// \param thePrs a selected presentation in the view
+ /// \return a boolean value
+ virtual bool isValidSelectionCustom(const ModuleBase_ViewerPrs& thePrs);
+
+ /// Return an object and geom shape by the viewer presentation
+ /// \param thePrs a selection
+ /// \param theObject an output object
+ /// \param theShape a shape of the selection
+ virtual void getGeomSelection(const ModuleBase_ViewerPrs& thePrs,
+ ObjectPtr& theObject,
+ GeomShapePtr& theShape);
+
+ /// Creates a backup of the current values of the attribute
+ /// It should be realized in the specific widget because of different
+ /// parameters of the current attribute
+ /// \param theValid a boolean flag, if restore happens for valid parameters
+ void restoreAttributeValue(const bool theValid);