separate some options related to the scroll gesture

[Diax170]

There's this functionality (source: TUTORIAL.md):

You can also scroll windows with the mouse. Press mod and the middle mouse button, and you can drag/scroll columns and windows.

and my suggestion is to separate some options so they're controlled individually for touchpads and mice:

1. is enabled gesture_scroll_enable true|false
2. sensitivity (also determines direction when negative/positive) gesture_scroll_sensitivity

(fingers gesture_scroll_fingers are touchpad only)

Could be renamed to sth like:

• gesture_scroll_mouse_enable and gesture_scroll_touchpad_enable
• gesture_scroll_mouse_sensitivity and gesture_scroll_touchpad_sensitivity
• gesture_scroll_touchpad_fingers or as it is rn gesture_scroll_fingers

Example use case: I don't use natural scrolling on touchpad so in my case touchpad sensitivity would be -2.5 and for mouse 1.0

Might be related: #213

Another idea: in the docs you could add a note to the gesture_scroll_sensitivity option that a negative value inverses the direction (in case someone doesn't figure it out themselves)

[dawsers]

scrolling windows with the mouse isn't affected by gesture_scroll_enable, it is always on, regardless of that option. That option only enables/disables scrolling using swiping devices, same as the fingers option.

So I could only separate sensitivity for swiping devices vs. mouse, but the other options only affect swiping devices.

#213 is about separating axes, which I won't do, because in scroll, scrolling happens in both horizontal and vertical directions, so I am not going to disable one of them because it would be inconsistent, and would only satisfy someone who comes from another window manager that doesn't support scrolling in both directions, while confusing people who mainly use scroll. So it doesn't make sense to limit scroll just because people are used to another WM that has that limitation.

[Diax170]

You can separate only sensitivity, I'm OK with that 👍

but it would be nice to also configure the swiping modifier (I don't need that but others might) from Super (I assume) to some other mod

I also forgot to include in the issue desc that in the tutorial there's a "mod" key mentioned:

Press mod and the middle mouse button, and you can drag/scroll columns and windows.

which is a bit confusing because it might refer to the "super" key or $mod or sth else

[dawsers]

The mouse scrolling modifier is the same $mod key configured for mouse resizing or movement of windows, if you set it to Mod4 it will be Super, if you set it to Mod1, it will be Alt, etc. In my opinion, it makes sense that it is the same key you use to manipulate windows/containers. The tutorial mentions mod because that options is controlled by:

floating_modifier <modifier> normal|inverse

as explained in the manual.

So whatever setting you have for the option in your config will be shared for resizing. moving and scrolling. In the default config shipped with scroll, it will be $mod which is set to Super (that is why the tutorial says mod), but for example, I use Alt when nesting the compositor, so I can also modify the windows in the nested compositor, you can use anything you want, but it will be the same key for the three actions,

[dawsers]

I added gesture_scroll_sensitivity_mouse in cc57b97. Now you can set different sensitivities for swiping and mouse devices, allowing natural vs reverse scrolling. Thanks!

[Diax170]

Thank you for the explanation!