put-file in editor<%>

Called when the user must be queried for a filename to save an editor. Starting-directory and default-name paths are passed in, but either may be #f to indicate that any directory is fine or there is no default name.

• (send an-editor put-file directory default-name) -> path or #f
   directory : path or #f
   default-name : path or #f

  Calls the global put-fileprocedure. The directory and filename arguments cannot be strings; each must be a path value, section 11.3.1 in PLT MzScheme: Language Manual.

  If the editor is displayed in a single canvas, then the canvas's top-level frame is used as the parent for the file dialog. Otherwise, the file dialog will have no parent.