Use WinA&D or MacA&D to draw UML models enriched with Delphi language specific details, then generate Delphi class declarations and function frames with one mouse click.
WinTranslator or MacTranslator scans Delphi code to extract design information to a text file. Import that file into WinA&D to generate UML class models.
The automated process takes just minutes to create models from code for a large project.