lua event-based fast/slow button generator for rotary switches

https://raw.githubusercontent.com/bbuhlig/fsuipc-contrib/main/rotfsev.lua

The above is what I wrote to manage slow vs. fast rotation of the inc/dec and trim wheel on my Honeycomb Bravo. While not perfect, it's the best I've been able to manage so far given the apparent inability of these rotaries to detect button presses faster than ~95ms. 

This module monitors a set of rotary switches for fast vs. slow toggling based on a user provided threshold between successive button events. If the rotary is moved fast enough that consecutive button events are received within a threshold, a fast virtual button is sent and successive button events are ignored. Otherwise a slow virtual button is sent for each button event if consecutive events are not received within the threshold. If your device is "glitchy" and regularly generates spurious fast events even when turning the rotary slowly, you can tell the module to treat a configurable number of fast events received within a time period as slow events.

Each virtual button can be assigned in the .ini to send FS control commands and keypresses, such as variable rates for trim adjustments on an elevator trim wheel, ref p.25 of the Advanced User's Guide.

This module provides a generally similar concept to the Rotaries.lua approach but takes advantage of buttons that are directly detected by FSUIPC and is primarily event-based rather than poll-based. Thus it should be more efficient/performant.

Define the desired buttons according to the array passed to the init() function at the bottom of the file.

[Originally posted in old SimMarket support forums by Blake Buhlig]