+ MODEL_EXPORT static Handle_Model_Application getApplication();
+ //! Returns the document by the identifier
+ //! \returns false of document is not yet created/not loaded
+ MODEL_EXPORT std::shared_ptr<Model_Document> document(const int theDocID);
+ //! Returns true if document has been created
+ MODEL_EXPORT bool hasDocument(const int theDocID);
+ //! Returns true if root document has been created
+ MODEL_EXPORT bool hasRoot();
+ //! Returns root document, if created (or null otherwise)
+ MODEL_EXPORT std::shared_ptr<Model_Document> rootDocument();
+ //! Deletes the document from the application
+ MODEL_EXPORT void deleteDocument(const int theDocID);
+ //! Deletes all documents existing in the application
+ MODEL_EXPORT void deleteAllDocuments();
+ //! Creates a new document an returns an id of this document
+ //! \param theDocID if it is zero, the root document is created
+ MODEL_EXPORT void createDocument(const int theDocID);
+ //! Loads document by the file name (if it is registered as load by demand)
+ //! \param theDocName name of the document file
+ //! \param theDocID the identifier of the loaded document (to be created)
+ //! \returns true if load is ok
+ MODEL_EXPORT bool loadDocument(const std::string theDocName, const int theDocID);