Key Event Constants
This page describes the value that is passed to scripts in the event parameter. It is used in Telemetry and One-Time scripts, as well as widget scripts in full screen mode.

The key event mechanism

Each time a key is pressed, held and released a number of events get generated. Here is a typical flow:
  • when a key is pressed a FIRST event is generated
  • if the key continues to be pressed, then after a while a LONG event is generated
  • if the key continues to be pressed, then a REPEAT events are being generated
  • when the key is released a BREAK event is generated
Couple of examples:
  • a short press on key would generate: FIRST, BREAK
  • a longer pres on key would generate: FIRST, LONG, BREAK
  • even longer press: FIRST, LONG, REPEAT,REPEAT, ..., BREAK
This normal key event sequence can be altered with the killEvents(key) function. Any time this function is called (after the FIRST event) all further key events for this key will be suppressed until the next key press of this key. Examples:
  • kill immediately after the key press would generate: FIRST
  • kill after the long key press would generate: FIRST, LONG

Constants

The event parameter in the Telemetry and One-Time scripts run function actually carries two pieces of information:
  • key number
  • type of event
The two fields are combined into one single number. Some of these combinations are defined as constants and are available to Lua scripts:
Key Event Name
Comments
EVT_MENU_BREAK
MENU key release
EVT_PAGE_BREAK
PAGE key release
EVT_PAGE_LONG
MENU key long press
EVT_ENTER_BREAK
ENT key release
EVT_ENTER_LONG
ENT key long press
EVT_EXIT_BREAK
EXIT key release
EVT_PLUS_BREAK
+ key release
EVT_MINUS_BREAK
- key release
EVT_PLUS_FIRST
+ key press
EVT_MINUS_FIRST
- key press
EVT_PLUS_REPT
+ key repeat
EVT_MINUS_REPT
- key repeat
Radios with rotary encoder (X7 and Horus) have also:
Key Event Name
Comments
EVT_ROT_BREAK
rotary encoder release
EVT_ROT_LONG
rotary encoder long press
EVT_ROT_LEFT
rotary encoder rotated left
EVT_ROT_RIGHT
rotary encoder rotated right

Virtual events

Given the large number of radios supported by OpenTX, and the large difference in keys available on those, a set of VIRTUAL KEYS has been defined and are mapped to best fit available hardware
Virtual Key Event Name
Comments
EVT_VIRTUAL_NEXT_PAGE
for PAGE navigation
EVT_VIRTUAL_PREV_PAGE
for PAGE navigation
EVT_VIRTUAL_ENTER
EVT_VIRTUAL_ENTER_LONG
EVT_VIRTUAL_MENU
EVT_VIRTUAL_MENU_LONG
EVT_VIRTUAL_NEXT
for FIELDS navigation
EVT_VIRTUAL_NEXT_REPT
for FIELDS navigation
EVT_VIRTUAL_PREV
for FIELDS navigation
EVT_VIRTUAL_PREV_REPT
for FIELDS navigation
EVT_VIRTUAL_INC
for VALUES navigation
EVT_VIRTUAL_INC_REPT
for VALUES navigation
EVT_VIRTUAL_DEC
for VALUES navigation
EVT_VIRTUAL_DEC_REPT
for VALUES navigation