Two finger pinch is often mis-recognised as two finger swipe.

[dreirund]

Describe the bug

Two finger pinch is easily misinterpreted as two finger swipe.

Expected behaviour

Make it easier to issue pinch gestures.

Looks like pinch recognition is too "strict".

Make a pinch if the relative distance between the fingers, or the angle of the line between the fingers, changes significantly, also if one finger does not move much absolutely.

Best: Add configuration items on thresholds to tell pinch and swipe apart.

Actual behaviour

I have two finger pinch and two finger swipe gestures configured. However, if I want to pinch, very easily touchegg does a swipe instead.

For three fingers this problem also appears, but less often.

I had the impression that with Touchégg version 1 it was much easier to actually trigger a two finger pinch correctly while also beeing able to trigger two finger swipe.

I use a touchscreen, not a touchpad. It is often just not easy to move both fingers at the same speed in opposite directions; often one finger does not move much but the other does.

Your environment

• Version of Touchégg: Run touchegg --version in the terminal to check the version: Touchégg v2.0.11..
• Operating System: Ubuntu, Fedora, Arch Linux...: Artix GNU/Linux.
• Desktop Environment: Gnome, KDE, Xfce...: No full blown desktop environment. Standalone window manager: xfwm4 or openbox; standalone Panels: xfce4-panel.
• Multitouch device: Lenovo m14t touchscreen.

[JoseExposito]

I just released v2.0.12 including improvements on pinch detection.

Once it is available for your distro, could you test if the new version improved 2 finger pinch detection, please?

If not, a libinput record will help me to reproduce the issue locally. In order to generate one, execute this command:

$ sudo libinput record > recording.yml

And perform a pinch gesture. If the pinch is buggy, press control+C and attach the file here. Otherwise, press control+C and restart the command to keep the log as short as possible.

[dreirund]

I just released v2.0.12 including improvements on pinch detection.

Once it is available for your distro,

I just made it available for myself

could you test if the new version improved 2 finger pinch detection, please?

It does not look better.

If not, a libinput record will help me to reproduce the issue locally.

Here I attach the following:

• Ouput of libinput record and corresponding output of touchegg --client --debug for a two finger swipe down that is correctly recognised as two finger swipe down,
• Ouput of libinput record and corresponding output of touchegg --client --debug for a two finger pinch out that is correctly recognised as two finger pinch out,
• Ouput of libinput record and corresponding output of touchegg --client --debug for a two finger pinch out that is wrongly correctly recognised as two finger swipe right,
• Ouput of libinput record and corresponding output of touchegg --client --debug for a two finger pinch in that is wrongly correctly recognised as two finger swipe left.

Does that help?

[JoseExposito]

Yes, thanks for the logs. There was a problem detecting pinch gestures when the fingers are placed horizontally or vertically.

Could you test this PR to discard any further issues, please? #544

[dreirund]

Could you test this PR

Can you tell me how I get the code/ patch? I have no idea of git besides checkout, and also do not know about github specialities. Can you provide a standalone patchfile I can apply to the latest release or git master branch? Regards!

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-- | sed 's/\([Mm]\)an[n]*/\1ensch/g'

[JoseExposito]

Sure, I merged the lock file fix to simplify things a bit. Since you were using PKGBUILD to install the latest release, you should be able to change the source to point to the pull request branch:

source=("${_pkgname}::git+https://github.com/JoseExposito/touchegg.git#branch=issue-541")

Borrowed that like from AUR touchegg-git.

[dreirund]

Hey,

*`#branch=issue-541`*

yes, this seems to solve my problem, thanks for it!

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-- ich warte gerne [...] Wenn ich warten muss, da hab' ich ja viel Zeit. (Quelle: Peter Lustig, http://youtube.com/watch?v=5ippbVCKbjQ&t=113)