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Fixed circuit variables not working because of a null listener in their listener list (#61961)

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Co-authored-by: Watermelon914 <3052169-Watermelon914@users.noreply.gitlab.com>
This commit is contained in:
Watermelon914
2021-10-09 08:58:27 +01:00
committed by GitHub
parent fb3cf57d49
commit 7ef01161ed
1 changed files with 6 additions and 0 deletions
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code/modules/wiremod/core/variable.dm
+6
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@@ -38,10 +38,16 @@
for(var/obj/item/circuit_component/component as anything in listeners)
component.trigger_component()
/datum/circuit_variable/proc/on_listener_qdel(datum/listener)
SIGNAL_HANDLER
listeners -= listener
/// Adds a listener to receive inputs when the variable has a value that is set.
/datum/circuit_variable/proc/add_listener(obj/item/circuit_component/to_add)
listeners += to_add
RegisterSignal(to_add, COMSIG_PARENT_QDELETING, .proc/on_listener_qdel)
/// Removes a listener to receive inputs when the variable has a value that is set. Listener will usually clean themselves up
/datum/circuit_variable/proc/remove_listener(obj/item/circuit_component/to_remove)
UnregisterSignal(to_remove, COMSIG_PARENT_QDELETING)
listeners -= to_remove