On Thu, Apr 22, 2021 at 3:28 AM Platon Pronko
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) so they'll be passed on to the child window. -- brandon s allbery kf8nh allbery.b@gmail.com