Re: display-mm-width return value off on Windows

[Ralf Angeli <angeli@caeruleus.net>]

* Richard Stallman (2006-07-12) writes:

> This approach has a problem: it assumes there is just one display (or
> that all displays have the same size).  The right way to do this is to
> let the user specify the size of each display individually.  It could
> be done with a frame parameter.

Okay.  Would it then suffice to pick an arbitrary frame on the display
given as the argument of `display-mm-width' and check the parameter of
that frame?  That could be done with something like

(let ((frame-list (frames-on-display-list display)))
  (when frame-list
    (frame-parameter (car frame-list) 'display-mm-width)))

assuming the frame parameter is called `display-mm-width'.

-- 
Ralf