[xmonad] Is there a way to reparent a window manually?

Sat Jul 24 16:58:38 UTC 2021

Hi!

I checked with xprop, and I don't have _NET_WORKAREA set on my windows, so I do need to set it somehow. My situation is a bit complicated by having two monitors of different resolution arranged in a somewhat complex geometry:

xrandr --output HDMI-0 --auto --output HDMI-1 --auto --pos 2560x1440

(two outputs, one on the top-left, second down and to the right from it, with only corners connecting - this way the mouse does not jump to different screen by mistake)

Is there a way to handle _NET_WORKAREA properly in such situation? Will the logHook run each time my focus changes between windows, enabling me to set _NET_WORKAREA according to the current display I use?

Best regards,
Platon Pronko

On 2021-07-24 19:39, Brandon Allbery wrote:
> I'm doing it manually: https://github.com/geekosaur/xmonad.hs/blob/pyanfar/xmonad.hs#L356-L362 <https://github.com/geekosaur/xmonad.hs/blob/pyanfar/xmonad.hs#L356-L362> which is run from the `logHook` and which I computed from the size of mate-panel. Note that I have panels at top and bottom so you'll want to account for that when comparing to what I computed.
> 
> On Sat, Jul 24, 2021 at 12:27 PM Platon Pronko <platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>> wrote:
> 
>     Hi!
> 
>      > But it almost looks like you're using something like DwmStyle as your layout, with that little tab up top including the program icon.
> 
>     That's actually xfce4-panel, but it takes only a portion of the horizontal space - the other part is usually occupied by xmobar.
> 
>      > I'm using MATE as my DE, for what it's worth.
> 
>     Thanks for the tip, I'll check it out.
> 
>     Actually, maybe my problems stem from the fact that I don't actually use most of XFCE? I only start xfce4-panel and xfce4-session - so basically XFCE has no say about the windows. "Full" xfce runs the Unity editor just fine.
> 
>      > _NET_WORKAREA matters because some programs (notably anything using Qt/KDE) use it to place their menus.
> 
>     How does one configure it properly? I tried searching for something related to _NET_WORKAREA, but it mostly find some unrelated discussions about initial implementation in Xmonad.
> 
>     Best regards,
>     Platon Pronko
> 
>     On 2021-07-24 02:39, Brandon Allbery wrote:
>      > Yeh, I can't reproduce that locally. ("Vindictive ways" is probably dependence on EWMH, which most programs do these days.) But it almost looks like you're using something like DwmStyle as your layout, with that little tab up top including the program icon.
>      >
>      > I'm using MATE as my DE, for what it's worth. (Unity Editor is not best pleased with it, but I assume that has more to do with being run on a 4GB laptop with low-end video.)
>      >
>      > _NET_WORKAREA matters because some programs (notably anything using Qt/KDE) use it to place their menus.
>      >
>      > On Fri, Jul 23, 2021 at 2:28 PM Platon Pronko <platon7pronko at gmail.com <mailto:platon7pronko at gmail.com> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>>> wrote:
>      >
>      >     Hi!
>      >
>      >      > I'm trying to reproduce your issues with my config, but I have no idea what I'm doing. Can you upload a sample I can try to work with?
>      >
>      >     I've attached the simplest config that still reproduces the problem (actually, the problem can be reproduced even with using `def` instead of `xfceConfig`, but then the system breaks in a vindictive ways). Also I'm attaching a screenshot that showcases the problem - see several "menus" being visible simultaneously.
>      >
>      >      > For what it's worth, I have the packages window open and, whether placed away from the window (via PlaceHook) or over it, I see no problems with menus in either window.
>      >
>      >     Maybe my problem is due to xmonad-xfce interactions? What DE are you running (if any)?
>      >
>      >      > (1) Your config does not have `ewmh` configured (this seems unlikely); or
>      >
>      >     Checked - I do have `ewmh` configured since I use `xfceConfig` (which builds upon `desktopConfig` which in turn applies `ewmh`).
>      >
>      >      > (2) you're having `_NET_WORKAREA` issues.
>      >
>      >     I'm not sure how to test this. Moreover, why _NET_WORKAREA should be related to sub-window repainting?
>      >
>      >     Best regards,
>      >     Platon Pronko
>      >
>      >     On 2021-07-20 18:50, Brandon Allbery wrote:
>      >      > I'm trying to reproduce your issues with my config, but I have no idea what I'm doing. Can you upload a sample I can try to work with?
>      >      >
>      >      > Someone who plays Mono-based games reports they work fine with xmonad,k so that may not be the problem. Two others I'm aware of are:
>      >      >
>      >      > (1) Your config does not have `ewmh` configured (this seems unlikely); or
>      >      > (2) you're having `_NET_WORKAREA` issues.
>      >      >
>      >      > If it's EWMH, simply configuring the `ewmh` combinator should fix it. But quite a lot of stuff required EWMH these days, so I can't imagine you haven't run into this before.
>      >      >
>      >      > `_NET_WORKAREA` is complex. I'm told by other people that they have no problem with it (more correctly, without it), but I find I need to set it for some things (notably, KDE menus) to work properly. The difference may be that I have a status bar at the top of my screen.
>      >      >
>      >      > On Fri, Apr 23, 2021 at 11:05 AM Platon Pronko <platon7pronko at gmail.com <mailto:platon7pronko at gmail.com> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>>>> wrote:
>      >      >
>      >      >     Hi!
>      >      >
>      >      >     Tried adding all the event masks, no effect. Even more, even if I remove all events from the mask except X.ExposureMask then mouse movement and keyboard buttons still work.
>      >      >
>      >      >     Best regards,
>      >      >     Platon Pronko
>      >      >
>      >      >     On 2021-04-23 01:07, Brandon Allbery wrote:
>      >      >      > On Thu, Apr 22, 2021 at 3:28 AM Platon Pronko <platon7pronko at gmail.com <mailto:platon7pronko at gmail.com> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>>> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com> <mailto:platon7pronko at gmail.com <mailto:platon7pronko at gmail.com>>>>> wrote:
>      >      >      >
>      >      >      >     It seems that this could be happening due to XMonad being non-reparenting (I ran the same app under XFCE, and it seems to work okay).
>      >      >      >
>      >      >      >
>      >      >      > This would not surprise me; it looks like they use Mono on Linux/Mac, and as yet there is no way to tell Mono that the window manager is non-reparenting so canvas widgets get messed up (they can't find themselves, since X11 uses window-relative addressing instead of screen-relative like Windows/.NET).
>      >      >      >
>      >      >      >     Any idea about what am I missing? Maybe my event masks are wrong?
>      >      >      >
>      >      >      >
>      >      >      > You probably want all of the button-related events (see https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html> <https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html>> <https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html> <https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html>>> <https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html> <https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html>> <https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html> <https://tronche.com/gui/x/xlib/events/mask.html <https://tronche.com/gui/x/xlib/events/mask.html>>>>) so they'll be passed on to the child window.
>      >      >      >
>      >      >      > --
>      >      >      > brandon s allbery kf8nh
>      >      >      > allbery.b at gmail.com <mailto:allbery.b at gmail.com> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com>> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com>>> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com>> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com>>>>
>      >      >
>      >      >
>      >      >
>      >      > --
>      >      > brandon s allbery kf8nh
>      >      > allbery.b at gmail.com <mailto:allbery.b at gmail.com> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com>> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com>>>
>      >
>      >
>      >
>      > --
>      > brandon s allbery kf8nh
>      > allbery.b at gmail.com <mailto:allbery.b at gmail.com> <mailto:allbery.b at gmail.com <mailto:allbery.b at gmail.com>>
> 
> 
> 
> -- 
> brandon s allbery kf8nh
> allbery.b at gmail.com <mailto:allbery.b at gmail.com>