+ //! Returns current viewer
+ virtual ModuleBase_IViewer* viewer() const = 0;
+
+ //! Returns property panel
+ virtual ModuleBase_IPropertyPanel* propertyPanel() const = 0;
+
+ /// A filter to process an attribute validators
+ /// \return a filter
+ Handle(ModuleBase_FilterValidated) validatorFilter();
+
+ //! Returns the factory of selection filters : the only one instance per application
+ ModuleBase_FilterFactory* selectionFilters() const;
+
+ //! Returns currently active operation
+ virtual ModuleBase_Operation* currentOperation() const = 0;
+
+ //! Returns true if the operation with id theId can be started
+ virtual bool canStartOperation(QString theId) = 0;
+
+ //! Returns started operation by the operation identifier
+ //! \param theId an operation id
+ //! \return an operation instance or NULL
+ virtual ModuleBase_Operation* findStartedOperation(const QString& theId) = 0;
+
+ //! Returns true if the operation with id theId can be stopped
+ //! \param theOperation a stopped operation
+ //! \return boolean result
+ virtual bool canStopOperation(ModuleBase_Operation* theOperation) = 0;
+
+ //! Aborts the operation.
+ //! \param theOperation an aborted operation
+ virtual void abortOperation(ModuleBase_Operation* theOperation) = 0;
+
+ //! Returns AIS object by data object
+ //! \param theObject a data object
+ virtual AISObjectPtr findPresentation(const ObjectPtr& theObject) const = 0;
+
+ //! Returns data object by AIS
+ //! \param theAIS a presentation
+ virtual ObjectPtr findPresentedObject(const AISObjectPtr& theAIS) const = 0;
+
+ //! Select features clearing previous selection.
+ //! If the list is empty then selection will be cleared
+ //! \param theValues a list of presentations
+ virtual void setSelected(const QList<ModuleBase_ViewerPrs>& theValues) = 0;
+
+ /// Update of commands status
+ virtual void updateCommandStatus() = 0;
+