virtual void SetFileName(std::string const &fileName)
{ if (Filename != fileName)
Filename = fileName, IsDocumentModified = true; }
std::ifstream *OpenFile();
bool CloseFile();
virtual void SetFileName(std::string const &fileName)
{ if (Filename != fileName)
Filename = fileName, IsDocumentModified = true; }
std::ifstream *OpenFile();
bool CloseFile();