Libinput Adds A Touchpad Software Middle Button
Written by Michael Larabel in Wayland on 6 April 2016 at 08:34 AM EDT. 1 Comment
WAYLAND --
The libinput input handling library used by X.Org, Wayland, and Mir systems now has support for a touchpad software middle button.

Red Hat's Peter Hutterer explained in a blog post, "I just pushed a patch to libinput master to enable a middle button on the clickpad software buttons. Until now, our stance was that clickpads only get a left and right software button, split at the 50% mark. The reasoning is simple: touchpads only have markings for left and right buttons (if any!) and the middle button's extents are not easily discoverable if there is no visual or haptic feedback...So the patch I just pushed out to master enables a middle software button between the left and the right button. The exact width of the button scales with the touchpad but it's usually around 20-25mm and it's centered on the touchpad so despite the lack of visual or haptic guides it should be reliable to hit. The new behaviour is hard-coded and for now middle button emulation continues to work on touchpads."

The Git code can be found here until the next release happens.
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