scrolling on the bar module navigate the events about i3-agenda

[rosenpin]

Currently it's impossible to do this.
A relatively easy way to do this will be to

1. add support for a "skip" flag for the script, where the skip will represent the number of events to skip, for example ./i3-agenda -... --skip 1 will fetch the events[1] (the second closest event)
2. make a utility script that will keep the skip number in a file. Something like

#!/bin/bash
file=/tmp/i3-agenda-skip.tmp
skip=$(cat $file)
skip+=1
echo $skip >> $file

3. make polybar refresh the events on scroll

[module/agenda]
    ...
    type = custom/script
    exec = i3-agenda -c ~/.google_credentials.json -ttl 30 --skip $(cat /tmp/i3-agenda-skip.tmp) 
    enable-scroll = true
    scroll-up = onscroll.sh && i3-agenda -c ~/.google_credentials.json --update --skip $(cat /tmp/i3-agenda-skip.tmp) 
    interval = 1 # you can instead refresh the bar manually on scroll up instead of having a low interval. See here for more info https://github.com/polybar/polybar/issues/563

Bonus

4. You can make a crontab to periodically reset the /tmp/i3-agenda-skip.tmp so the events will return to normal after scrolling, you could also add a right click option in polybar to reset the skip file, making the functionality: scroll to next event, right click to go back to current event

TODO:

• add support for skip flag in i3-agenda