(Bug) Left button drag default "window move" option is broken on X11

[Andrew-Mattias]

Easily reproducible on X11 session of Plasma 6. In Wayland session everything is fine and working as intended.

Possible easy solution - deactivate this option in ComboBox and rename it to "Window Move <unavailable on X11>", if X11 Plasma session is detected. Such fix should be ok, because X11 will be phased out soon anyway.

It will be a bit sad though, because I have to use X11 Plasma to remote into my PC through AnyDesk, which allows remoting only into X11 sessions (the way i discovered this bug).

I tried a couple of left button drag options, some of them are fine on X11, some are broken. I would elaborate on this matter later in the comments for this issue.

[antroids]

I added a general warning and error messages for Drag => Window Move action.
Looks like x11 cannot handle move action properly when mouse button already pressed.
Probably, there are some other unsupported combinations, but I don't want to test them all.

[Andrew-Mattias]

I added a general warning and error messages for Drag => Window Move action. Looks like x11 cannot handle move action properly when mouse button already pressed. Probably, there are some other unsupported combinations, but I don't want to test them all.

Yes, there are plenty of bugs related to mouse dragging when X11 session is used. I have documented only "window move" one by now, because I was time constrained and "window move" is the option set as a default and I use it extensively. I am planning to play more with mouse drag feature so I will file bug reports on this matter as I encounter them.