====== Configure X11 Touchscreen Gestures ======
NOTE: The techniques and methods described below do not work in Wayland.
===== Installing the evdev Dependency =====
The following configurations require the evdev. If it is not already installed, install it with ''sudo apt install xserver-xorg-input-evdev''. For more information about the evdev options and their syntax please see the [[https://manpages.debian.org/stable/xserver-xorg-input-evdev/evdev.4.en.html|evdev manpage]] and the [[https://www.x.org/releases/current/doc/man/man5/xorg.conf.5.xhtml#heading9|InputClass configuration options]].
===== Add a long-touch right-click gesture =====
The following procedure will configure X Windows so a long-touch (touch and hold) will simulate a right-click and display a context menu.
- Create the file ///etc/X11/xorg.conf.d/90-touch-gestures.conf// with the following contents:
Section "InputClass"
Identifier "touch gestures"
Driver "evdev"
MatchProduct "Microchip Technology Inc. AR1100 HID-MOUSE"
Option "EmulateThirdButton" "1"
Option "EmulateThirdButtonTimeout" "750"
Option "EmulateThirdButtonMoveThreshold" "50"
EndSection
- Reboot
{{ :comfilepi:right_click.mp4?600x338 |}}
In Mono applications, this feature can cause the MouseDown event to delay. If your application depends on an immediate MouseDown event, please delete the file ///etc/X11/xorg.conf.d/90-right-click.conf//.
===== Add a touch-and-drag scroll gesture =====
The following procedure will configure X Windows so when you touch and drag your finger up and down the touchscreen it will scroll.
- Create the file ///etc/X11/xorg.conf.d/90-touch-gestures.conf// with the following contents:
Section "InputClass"
Identifier "touch gestures"
Driver "evdev"
MatchProduct "Microchip Technology Inc. AR1100 HID-MOUSE"
Option "EmulateWheel" "1"
Option "EmulateWheelButton" "1"
Option "EmulateWheelInertia" "10"
Option "EmulateWheelTimeout" "200"
Option "YAxisMapping" "4 5"
EndSection
- Reboot
{{ :comfilepi:roll.mp4?600x338 |}}
"EmulateWheelInertia" "10"
{{ :comfilepi:drag.mp4?600x338 |}}
"EmulateWheelInertia" "100"
Use Option "YAxisMapping" "5 4" to invert the scroll direction.