bug#18657: 24.4.50; positioning frames on multi-monitor displays

[Drew Adams]

As an update, the OP who reported the issue to me confirms that he
is using MS Windows (I thought he was not).  And he sent me this
info from his setup:

(frame-parameters):

((tool-bar-position . top) (parent-id) (explicit-name) (display . "w32") 
(visibility . t) (icon-name) (window-id . "459396") (top . 11) (left + -1249) 
(buried-buffer-list) (buffer-list #<buffer *Messages*> #<buffer  *Minibuf-1*> 
#<buffer procedure-codes.org> #<buffer  *Agenda Commands*> #<buffer *Org 
Agenda(w)*> #<buffer work-log.org>) (unsplittable) ...

M-x maximize-frame

(frame-parameters):
((tool-bar-position . top) (parent-id) (explicit-name) (display . "w32") 
(visibility . t) (icon-name) (window-id . "459396") (top . 0) (left . 0) 
(buried-buffer-list) (buffer-list #<buffer *Messages*> #<buffer  *Minibuf-1*> 
#<buffer procedure-codes.org> #<buffer  *Agenda Commands*> #<buffer *Org 
Agenda(w)*> #<buffer work-log.org>) (unsplittable) ...)
M-x restore-frame
((tool-bar-position . top) (parent-id) (explicit-name) (display . "w32") 
(visibility . t) (icon-name) (window-id . "459396") (top . 11) (left + -1249) 
(buried-buffer-list) (buffer-list #<buffer *Messages*> #<buffer  *Minibuf-1*> 
#<buffer procedure-codes.org> #<buffer  *Agenda Commands*> #<buffer *Org 
Agenda(w)*> #<buffer work-log.org>) (unsplittable) ...)

Based on that, I've sent him an updated version of `maximize-frame'
(from `frame-cmds.el'), which differs only in not using (0,0) as the
position coordinates systematically.  Instead, it uses this:

(nth 1 (assq 'workarea (frame-monitor-attributes frame))) ; For left
(nth 2 (assq 'workarea (frame-monitor-attributes frame))) ; For right

Andy, perhaps you could try that?

[I'm assuming that the `workarea' and `geometry' values are, in order:
LEFT TOP, WIDTH HEIGHT.

FWIW, The doc of `display-monitor-attributes-list' refers to them as
X Y WIDTH HEIGHT, and the doc of `frame-monitor-attributes' refers to
the `d-m-a-l' doc.  Not so clear (What are X and Y? What units for
WIDTH and HEIGHT?), but better than nothing.

(BTW, if these essentially follow the `geometry' X Window spec, why
is the order changed from what is used for that?)]