Transferring focus to Emacs

Transferring focus to Emacs

[Joe Riel]

I want a separate program to give the focus to Emacs, and put the
cursor in a particular (existing) buffer.
   
Using emacsclient doesn't work, for example

$ emacsclient --eval '(pop-to-buffer "my-buffer")'

That does pop-up and select the buffer, however, after the command
executes, the window manager returns the focus to the xterm that
evaluated the command.  I want focus to remain in Emacs.

The "normal" call to emacsclient, with a filename, does not help
because that opens a file.  I want it to open an existing buffer.

Alternatively, emacs itself can issue whatever command is needed (I'm
communicating with emacs via another link).  Hmm.  Probably I need to
be sending the command to the window manager rather than Emacs (this
is on X). Is there an Emacs command that tells the window manager to
give the focus to Emacs (which might be on a different desktop)?
Alas, I'll want similar capability in a Windows 7 environment.

-- 
Joe Riel

Re: Transferring focus to Emacs

[Thierry Volpiatto]

Joe Riel <joer@san.rr.com> writes:

> I want a separate program to give the focus to Emacs, and put the
> cursor in a particular (existing) buffer.

Try wmctrl:

wmctrl -xa emacs
emacsclient do_what_you_have _to_do
wmctrl -xa go_back_to_initial_window (optional e.g firefox)
    

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A+ Thierry
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Re: Transferring focus to Emacs

[Joe Riel]

On Tue, 14 Jun 2011 19:10:29 +0200
Thierry Volpiatto <thierry.volpiatto@gmail.com> wrote:

> Joe Riel <joer@san.rr.com> writes:
> 
> > I want a separate program to give the focus to Emacs, and put the
> > cursor in a particular (existing) buffer.
> 
> Try wmctrl:
> 
> wmctrl -xa emacs
> emacsclient do_what_you_have _to_do
> wmctrl -xa go_back_to_initial_window (optional e.g firefox)

Thanks, nice suggestion. That works.

-- 
Joe Riel

Re: Transferring focus to Emacs

[Joe Riel]

On Tue, 14 Jun 2011 19:10:29 +0200
Thierry Volpiatto <thierry.volpiatto@gmail.com> wrote:

> Joe Riel <joer@san.rr.com> writes:
> 
> > I want a separate program to give the focus to Emacs, and put the
> > cursor in a particular (existing) buffer.
> 
> Try wmctrl:
> 
> wmctrl -xa emacs
> emacsclient do_what_you_have _to_do
> wmctrl -xa go_back_to_initial_window (optional e.g firefox)
  
Here's a variation on the theme.  Now I want to switch
focus back to the original window.  I know the process
number of a subprocess running in that window.  Is there
a way I can use it to find the process of the window 
(and finally the window itself)?

-- 
Joe Riel

Re: Transferring focus to Emacs

[Peter Dyballa]

Am 15.06.2011 um 08:14 schrieb Joe Riel:

> I know the process
> number of a subprocess running in that window.  Is there
> a way I can use it to find the process of the window
> (and finally the window itself)?

With ps you can determine the PID of its parent process. The pstree  
utility outputs the whole list of processes that lead to this process...

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