xfce4-mouse-settings needs TapButton3 = button2 for modern touchpads(ClickPad)

[Chris Rainey]

Modern touchpads and all ClickPad's can interpret gestures, chief among them: three-finger-tap = button-2(middle-click) for use in copy/paste functions and browser tabs creation/management.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: xfce4-settings 4.12.1-1ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-31.34-generic 4.13.13
Uname: Linux 4.13.0-31-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Jan 25 10:27:24 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-01-22 (2 days ago)
InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105)
SourcePackage: xfce4-settings
UpgradeStatus: No upgrade log present (probably fresh install)

[Utdemir-n (utdemir-n)]

Currently xfce-settings hardcodes touchpad multi-tap gesture buttons, and provides no way to disable that behavior.

I usually use two-finger middle click and three-finger right-click, but xfce4 overrides my settings on Xorg.conf synaptics settings and hardcodes them for three-finger middle click and two-finger right click.

From http://git.xfce.org/xfce/xfce4-settings/tree/dialogs/mouse-settings/main.c:
    tap_to_click = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (object));

    /* format: RT, RB, LT, LB, F1, F2, F3 */
    data[4] = tap_to_click ? 1 : 0;
    data[5] = tap_to_click ? 3 : 0;
    data[6] = tap_to_click ? 2 : 0;

Xfce should, whether provide a way for selecting data[5] = 2 and data[6] = 3, or disable that setting completely and let xorg/synaptics do the job.

[Simon Steinbeiß (ochosi)]

*** Bug 10608 has been marked as a duplicate of this bug. ***