activateWorkbench activeIView activeViewFit copyIDocument copyPartForProduct deleteIDocument editDocument exportTo get getActiveDocument getActiveWorkbench getDocumentById getIDocument getIDocument getIViewProvider importFrom insertIDocument isClosing newDocument openDocument openDocument openFile saveAll setActiveIDocument setEditIDocument setupContextIMenu

isClosing() virtual bool isClosing ( void  ) pure virtual 检查应用程序是否正在关闭 检查应用程序是否正在关闭 返回 布尔值，返回true，表示正在关闭；返回false,表示没有正在关闭