Easy mouse settings changing from right- to left-handed

[Konstantin Kharlamov]

On Sat, 2023-02-18 at 13:09 +0100, Tobias Leupold wrote:
> Hi all!
> 
> My little son starts to use a computer for school, so I currently share my 
> notebook with him. He's left-handed (and I'm right-handed), so I searched for 
> a convenient way to switch the mouse settings from right-handed to left-handed
> and vice versa, like with a small systray icon and just one click to do.
> 
> The only thing I found was "mouseswap-kf5" ( https://www.pling.com/p/998954/ )
> which seems to do this exact thing. But it seems to be outdated and 
> unmaintained -- I could not build it.
> 
> I then looked into the sources and thought it could not be that hard to re-
> write or update the thing, but after messing a bit with it, I have to admit 
> that I have no idea how to do it properly ;-) I could not even connect to some
> DBUS signal telling me that any systemsettings setting has been changed (I 
> never worked with this before) ...
> 
> So: Is there anything comparable we have in "official" KDE? And if not, can 
> anybody point me to docs about how to do it, so that I can try to implement 
> this myself?
> 
> This would imo be a nice addition to the default mouse system settings, like 
> "show a systray icon to switch between left- and right-handed" or such. I 
> think this would be a nice extra for a lot of people sharing their computer 
> with others.

Did you consider adding a separate user account, and just logging out/in as the
new user for him to use? So one user would be left-handed, the other one is
right-handed.

P.S.: I tried running `dbus-monitor` and changing left-handness in
systemsettings5, but don't see any event being sent, so not sure how to automate
such change. Perhaps someone else knows.