[ESS-bugs] select-window (C-c M-j) doesn't give input focus to target (*R*) [Carbon GNU Emacs]

[Stephen Eglen]

 > Moving the mouse around isn't going to do anything on Carbon / OS X,  
 > and also not on any X11 version if configured differently. For  
 > example, the X11 server I occasionally use (Apple X11) can be  
 > configured to select the windows that the mouse points on - but  
 > that's not the default.

Yes.  It probably only worked because I use focus-follows-mouse
behaviour, and maybe enough other people do for this bug not to have
been found before.  thanks for persisting with this!

 > Secondly, why not use `select-frame-set-input-focus'  to do this?  
 > It's meant to do exactly that.
 > With X, on the Mac, and on Windows it calls the appropriate function,  
 > while the backup is actually the call to set-mouse-position:

Good idea.  I think this code came from my iswitchb package, which
predates select-frame-set-input-focus -- but since the ChangeLog.9 in
emacs says this function was define 2001, I think we can just use it
instead, as you suggest.
 

 > I would probably test for (fboundp `select-frame-set-input-focus)  
 > before using it. You may need to keep the set-mouse-position business  
 > for XEmacs or very old versions of GNU Emacs - it's worth checking.

yes, not sure if it exists in XEmacs... will check.


Stephen