[xmonad] managehook: How to shift apps to a screen in dual-head?

[mito]

Am 14.01.22 um 08:42 schrieb Solid:
> On Thu, Jan 13 2022 16:50, mito wrote:
>>>> I got a proper dual-head xrandr configuration with one monitor in
>>>> landscape view and one in portrait view. So in xmonad I have 2x10
>>>> workspaces, which is fine.
>>> Are you using IndependentScreens or something?
>> Well, no, though I read about it.
>>
>> But I do have:
>>
>> import qualified Graphics.X11.Xinerama
> Then you shouldn't have 2x10 workspaces but only your "original" 10,
> since both monitors can use them.
OK, now it seems to work as you say – in KDE5/Plasma.
My problem was in Trinity, which is KDE3.5; screens are managed a bit 
different there.
So one just optionally needs an additional 'liftX screenWorkspace' hook?

On the other side, clients in Trinity don't swap monitors automatically 
if there was an empty screen; which was handy. They just were sticky if 
you don't shift them manually.

Now in Plasma clients swap monitors again though I changed from 
"W.greedyView" to "W.view"...

>> Sounds great!
>> And compiles well. – But yet it has no effect, whatever screenWorkspace
>> {0,1} (or {app,class}Name) I choose: the workspace fits, but the monitor
>> selection is ignored.
> That's weird, because I just tried it and it actually works for me.
> Specifically I used something like
>
>      myManageHook :: ManageHook
>      myManageHook = mconcat
>        [ -- ... other stuff ...
>        , className =? "mpv" --> maybe mempty doShift =<< liftX (screenWorkspace 1)
>        ]
>
> for my manageHook and now mpv does indeed seem to always spawn on the
> currently focused workspace of the second monitor.
>
>    Tony
Well, alternatively one could spawn an app via hotkeys with an 
additional "xdotool key Super_L+{w,e}" (w/ mod4-mask).

Is there already a hotkey for toggling 'clients on monitors switching'? 
(I mean, client A on screen 0 shifts to screen 1 & client B on screen 1 
shifts to screen 0 simultaneously.)