Thanks Brandon! Using the PerScreen module, I simply switched the condition from being on the screen width, to being on the screen x coordinate (which obviously differs between the left and right screens). However each time a new layout is returned (i.e. each time I switch screens) the index of the current selected layout from the layouts in the set is being reset. That is to be expected because there is no way of knowing apriori that the 2 layouts will have an equal amount of items, but in my case the 2 layout sets are symmetrical, therefore I would like to stay consistent with current selected layout index in the layout set. I tried looking around the Workspace ADT and the runLayout func but can't find a way to get to such an index. Is it feasible in a simple manner? I attached the code that I currently use. Any help is yet again, greatly appreciated! Thanks! On Wed, Dec 2, 2015 at 3:44 PM, Brandon Allbery wrote:

On Wed, Dec 2, 2015 at 3:11 AM, Tal Walter wrote:

...

In case I'm not missing any module in contrib, could someone please point me in a good starting direction as to how to implement such a thing?

This could be done with a layout modifier similar to onWorkspace, but you'll need to look in the StackSet for the workspace tag being laid out and determine what ScreenID it is currently on: that information is not passed to the LayoutHook. (xmonad-contrib in git has PerScreen but that triggers by screen width, not screen ID.)

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net

I see. Thanks anyway! The partial solution is great as well! On Fri, Dec 4, 2015 at 6:13 AM, Brandon Allbery wrote:

On Thu, Dec 3, 2015 at 4:25 AM, Tal Walter wrote:

...

Is it feasible in a simple manner? I attached the code that I currently use.

There is no such index. The layout is a function, it doesn't keep an index. This is also why there is no PreviousLayout message matching NextLayout.

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net