Feature request: Add Tap-and-Hold gestures.

[dreirund]

Is your feature request related to a problem? Please describe

I have no easy way for right (or middle) click emulation with just using one finger or a stylus, like it is standard and for me quite user friendly in Windows.

Describe the solution you'd like

I want to have a gesture that triggers when I tap the screen with one finger and hold for a to-be-specified amount of time without moving more than a to-be-specified distance.

This can be used to emulate a right click, for example.

And it would be a nice addon if there would be the option for an animation of e.g. a circle around the tap point, which gets filled over time and when it is completely full the gesture triggers.

Describe alternatives you've considered

Two finger tap. This is less convenient, and also not so easily foreseeable/ controllable if the click will be issued at the location of finger 1 or finger 2.

[JoseExposito]

I've considered this, but not implemented it because it is easy to trigger accidentally while resting your hand and because it is not precise with 2 or more fingers... Pretty much like tap gestures, the pointer moves to the place where the last finger touched the screen.

I guess that a good approach here is to make it available only for one finger.

[compilebunny]

Just a side note. evdev-right-click-emulation can provide a tap-and-hold right click on a touchscreen. It works alongside touchegg (at least no conflicts have been noted so far).

https://github.com/PeterCxy/evdev-right-click-emulation

Note the solution to modern compilation problems on the github issues page.