Posted by Sven Gothel on Jun 30, 2012; 10:32pm
URL: https://forum.jogamp.org/How-to-choose-the-primary-screen-with-NEWT-tp4025361p4025362.html

On 06/30/2012 04:04 PM, gouessej [via jogamp] wrote:
> Hi
>
> Some people use several monitors at the same time and the default Screen
> instance used by NEWT is a 2-monitor wide one. How can I solve this problem?
> How can I make the difference between 2-monitor wide Screen instances and
> single monitor wide Screen instances? Can I call gelAllScreens() very early to
> get all existing screens?

Right, I remember this situation back then when we
discussed and multi-monitor mode and fixed it by
allowing negative window coordinates.

We know (as you describe it) all current usual systems merge
all monitors and present them as 1 screen device.

Back then I started adding support of querying
the attached monitor/display devices so we can expose this information.

For X11 the patch utilizes xrandr version 13
to query the monitor/display layout. This work is at ~50%
For Windows and OSX this still would need to be done.

With given monitor layout one would be able to match coordinates
to a monitor.

I interrupted this task (code on my stash) due to other issues.

Maybe we file a bug report (enhancement) for it and after RC10/11
we may have a chance to squeeze that in.

Cheers, Sven

PS: Good reading your WebGL writeup. I even didn't accept
the claim that JavaScript/WebGL is not a plugin.

BTW .. maybe after your blog post you can post a link to it
here in jogamp [general] in case it's related. I often do this,
allowing a subsequent discussion of it - even though people rarely use
this opportunity.