Feature Suggestion: Backlight Scroll

[Agvantibo]

Hello. The backlight module is nice, but there is no scroll by default. This is easily fixable by creating a helper script like so:

#!/bin/fish
set backlight_device $argv[1]
set action $argv[2]
set dvalue $argv[3]

echo Backlight device: $backlight_device Bumping: $action By: $dvalue

set current_value (cat $backlight_device)

if test $action = up
    echo (math $current_value + $dvalue) > $backlight_device
else if test $action = down
    echo (math $current_value - $dvalue) > $backlight_device
else
    exit 2
end

And prepending the module config with somthing like

        "interval" : 0.2,
        "device": "intel_backlight",
        "on-scroll-down": "backlight_delta /sys/class/backlight/intel_backlight/brightness down 50",
        "on-scroll-up": "backlight_delta /sys/class/backlight/intel_backlight/brightness up 50",

You are unable to see it from the screencast, but the level is actually changing:
https://mega.nz/file/ubgk1baZ#01vxMsjlZ4KRBI_weng8qg7SrIG7xHbCeNupLXd5xv0
It is probably even possible to minify/hardcode some stuff and make an easily insertable oneliner

[Agvantibo]

There, I've recorded an unsettlingly lo-fi demo if the script in action: https://mega.nz/file/yOwGzDiQ#Y30rIKgcIldKcDUbPnC6bXYP6kYQxsUrwXpgrXp-zuA
(with my crappy webcam)

[LukashonakV]

Waybar v0.9.12
"on-scroll-up": "exec light -A 4", "on-scroll-down": "exec light -U 2"
works perfect