How to add gestures for an app?

[arpinerap]

I´m trying to add custom gestures for 3D Slicer application (https://www.slicer.org) in Ubuntu 22.04 to manage 2 finger zoom control.
When I push "+" button a new windows pops up with a message ordering to click on app window but Touché seems to be halt or waiting for something. It´s also impossible to come back to main menu. Maybe I´m doing something wrong....

Thanks on advance!

[JoseExposito]

Are you in a Wayland session? You can check it by running echo $XDG_SESSION_TYPE in a terminal and checking the value returned.

Touché and Touchégg are X11-only tools:
https://github.com/JoseExposito/touchegg?tab=readme-ov-file#does-touch%C3%A9gg-work-on-wayland

In the next version of Touché I'll add a pop-up warning about it so it is more obvious what's going on.