From: Phil Smy <phil@...>
Date: 2009-01-14T03:00:07+09:00
Subject: Re: getting info about attached displays

Kyle Schmitt wrote:
> On Tue, Jan 13, 2009 at 11:01 AM, Phil Smy <phil@philsmy.com> wrote:
>> Hi,
>> I have a ruby daemon process that needs to get info about the monitors
>> attached to the machine it is running on. Does anyone have any nice
>> x-platform way of doing this? Barring that, how about some Windows
>> calls?
>>
>> Thanks!
>> --
>> Posted via http://www.ruby-forum.com/.
> Phil, that's really more of a general unix (or DOS in the case of
> windows) question.
> 
> Still, for real OSes running X, xdpyinfo is a utility that provides
> tons of info, including the number of attached screens...
> 
> irb>%x[xdpyinfo][/number of screens: +[0-9]+/]
> => "number of screens:    1"
> 
> I'd suggest just running it into less, so you can get acquainted with
> it's output.  The man page sadly doesn't point you to useful C calls,
> but the source should be decently documented if you want to grab it
> from x.org or xfree86.org.
> 
> --Kyle

Thanks Kyle,
Yes... I realise now that it is more OS based (though I still can't find 
the windows command for it!).

The problem with xdpyinfo is that number of screens is actually NOT the 
number of displays. I have 2 monitors attached and I get the answer of 
1, because I have one virtual desktop spanning the two.

Anyway... off topic!

Thanks again
-- 
Posted via http://www.ruby-forum.com/.