code/__DEFINES/dcs/signals/signals_area.dm 
| COMSIG_AREA_POWER_CHANGE | from base of area/proc/power_change(): () | 
|---|---|
| COMSIG_AREA_ENTERED | from base of area/Entered(): (atom/movable/arrived, area/old_area) | 
| COMSIG_AREA_EXITED | from base of area/Exited(): (atom/movable/gone, direction) | 
| COMSIG_ENTER_AREA | from base of area/Entered(): (area/new_area). Sent to "area-sensitive" movables, see __DEFINES/traits.dm for info. | 
| COMSIG_EXIT_AREA | from base of area/Exited(): (area). Sent to "area-sensitive" movables, see __DEFINES/traits.dm for info. | 
| COMSIG_ALARM_LISTENER_TRIGGERED | Sent when an alarm is fired and an alarm listener has tracked onto it (alarm, area/source_area) | 
| COMSIG_ALARM_LISTENER_CLEARED | Send when an alarm source is cleared and an alarm listener has tracked onto it (alarm_type, area/source_area) | 
| COMSIG_ALARM_TRIGGERED | Called when an alarm handler fires an alarm | 
| COMSIG_ALARM_CLEARED | Called when an alarm handler clears an alarm | 
| COMSIG_AIRALARM_UPDATE_MODE | Called when the air alarm mode is updated | 
| COMSIG_AREA_FIRE_CHANGED | Sent when an area's fire var changes: (fire_value) | 
| COMSIG_WEATHER_BEGAN_IN_AREA | Called when some weather starts in this area | 
| COMSIG_WEATHER_ENDED_IN_AREA | Called when some weather ends in this area | 
| COMSIG_AREA_BEAUTY_UPDATED | From base of area/update_beauty() | 
| COMSIG_AREA_TURF_ADDED | From base of turf/change_area(area/old_area) | 
| COMSIG_AREA_TURF_REMOVED | From base of turf/change_area(area/new_area) | 
Define Details
COMSIG_AIRALARM_UPDATE_MODE 
Called when the air alarm mode is updated
COMSIG_ALARM_CLEARED 
Called when an alarm handler clears an alarm
COMSIG_ALARM_LISTENER_CLEARED 
Send when an alarm source is cleared and an alarm listener has tracked onto it (alarm_type, area/source_area)
COMSIG_ALARM_LISTENER_TRIGGERED 
Sent when an alarm is fired and an alarm listener has tracked onto it (alarm, area/source_area)
COMSIG_ALARM_TRIGGERED 
Called when an alarm handler fires an alarm
COMSIG_AREA_BEAUTY_UPDATED 
From base of area/update_beauty()
COMSIG_AREA_ENTERED 
from base of area/Entered(): (atom/movable/arrived, area/old_area)
COMSIG_AREA_EXITED 
from base of area/Exited(): (atom/movable/gone, direction)
COMSIG_AREA_FIRE_CHANGED 
Sent when an area's fire var changes: (fire_value)
COMSIG_AREA_POWER_CHANGE 
from base of area/proc/power_change(): ()
COMSIG_AREA_TURF_ADDED 
From base of turf/change_area(area/old_area)
COMSIG_AREA_TURF_REMOVED 
From base of turf/change_area(area/new_area)
COMSIG_ENTER_AREA 
from base of area/Entered(): (area/new_area). Sent to "area-sensitive" movables, see __DEFINES/traits.dm for info.
COMSIG_EXIT_AREA 
from base of area/Exited(): (area). Sent to "area-sensitive" movables, see __DEFINES/traits.dm for info.
COMSIG_WEATHER_BEGAN_IN_AREA 
Called when some weather starts in this area
COMSIG_WEATHER_ENDED_IN_AREA 
Called when some weather ends in this area