On Thu, Jun 13, 2013 at 2:02 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> > Date: Thu, 13 Jun 2013 12:45:54 +0100
> > From: E Sabof <esabof@gmail.com>
> >
> >
> > [1:text/plain Hide]
> >
> > This works on 24.3, but on trunk all windows will be shown as "selected".
> >
> > (setq-default
> >  mode-line-format
> >  '(:eval (if (eq (frame-selected-window)
> >                  (selected-window))
> >              "selected"
> >              "not-selected")))
> >
> > I don't know which behavior is correct, but being able to find which is
> the
> > "really" selected window would be nice.
>
> When the mode-line format is evaluated, Emacs makes its window the
> selected window.  If it didn't, how could it show values for that
> window in the mode line?
>

(frame-selected-window) used to remain bound to the window which the user
would consider selected, and only (selected-window) changed. I don't know
whether it was a bug, or intentional.

If it was a bug, I suppose I could get the desired results with command
hooks.