addEventHandler: Difference between revisions

Latest revision as of 15:58, 31 March 2024

1.85

1.00

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Description

Description:

Adds an Event Handler to the given object.

As many Event Handlers of any type can be added - existing Event Handlers do not get overwritten
Use removeEventHandler to remove an Event Handler

Read Event Handlers for more information and a list of all available Event Handlers.

Multiplayer:

Some event handlers are persistent (i.e they stay attached to the unit, even after it dies and respawns).

Groups:

Event Handlers

Syntax

Syntax:

target addEventHandler [type, code]

Parameters:

target: Object or

2.10 Group

type: String - see Event Handlers for the full list of available options

code: Code or String - code that should be executed when the Event Handler fires; executed in missionNamespace by default. Several Magic Variables are available:

Event Handler parameters are accessible via _this
The Event Handler type is available as _thisEvent
The Event Handler index is available as _thisEventHandler

Return Value:

Number - the index of the added Event Handler. Indices start at 0 for each unit and increment with each added Event Handler.

Examples

Example 1:: this addEventHandler ["Killed", { params ["_unit", "_killer"]; systemChat format ["%1 has been killed by %2.", _unit, _killer]; }];
Example 2:: _index = player addEventHandler ["Killed", { _this exec "playerKilled.sqs" }]

Additional Information

See also:: removeEventHandler removeAllEventHandlers Event Handlers addMPEventHandler addMissionEventHandler BIS_fnc_addScriptedEventHandler getEventHandlerInfo

Notes

: Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note

Killzone_Kid - c: Posted on Jun 07, 2015 - 21:06 (UTC)
: When using overridable EH, such as "InventoryOpened" and similar, where returning true allows to override default action, exitWith cannot be used to return value. So:
if (whatever) exitWith {true}; false;
Forget about it, will not work. Instead use:
if (whatever) then {true} else {false};
100% satisfaction guaranteed!

@@ Line 1: / Line 1: @@
-back to [[Scripting_Reference#A|COMREF]]
+{{RV|type=command
+|game1= ofp
+|version1= 1.85
-<h2 style="color:#000066">'''''object'' addEventHandler ''handler'''''</h2>
+|game2= ofpe
+|version2= 1.00
+|game3= arma1
+|version3= 1.00
-'''Operand types:'''
+|game4= arma2
+|version4= 1.00
-'''object:''' [[Object]]
+|game5= arma2oa
+|version5= 1.50
-'''handler:''' [[Array]]
+|game6= tkoh
+|version6= 1.00
-'''Type of returned value:'''
+|game7= arma3
+|version7= 0.50
-[[Number]]
+|arg= global
-'''Description:'''
+|eff= local
-Format of handler is '''''[type,command]'''''.
+|gr1= Event Handlers
-Check scripting topic [[Event handlers]] for more information.
+|descr= Adds an Event Handler to the given object.
+* As many Event Handlers of any type can be added - existing Event Handlers do not get overwritten
+* Use [[removeEventHandler]] to remove an Event Handler
+Read [[:Category:Event Handlers|Event Handlers]] for more information and a list of all available Event Handlers.
-Index of currently added handler is returned.
+|mp= Some event handlers are persistent (i.e they stay attached to the unit, even after it dies and respawns).
+|s1= target [[addEventHandler]] [type, code]
-'''Example:'''
+|p1= target: [[Object]] or {{GVI|arma3|2.10|size= 0.75}} [[Group]]
-player '''addEventHandler''' ["killed",{_this [[exec]] "playerKilled.sqs"}]
+|p2= type: [[String]] - see [[:Category:Event Handlers|Event Handlers]] for the full list of available options
+|p3= code: [[Code]] or [[String]] - code that should be executed when the Event Handler fires; executed in [[missionNamespace]] by default. Several [[Magic Variables]] are available:
+* Event Handler parameters are accessible via <sqf inline>_this</sqf>
+* The Event Handler type is available as <sqf inline>_thisEvent</sqf>
+* The Event Handler index is available as <sqf inline>_thisEventHandler</sqf>
+|r1= [[Number]] - the index of the added Event Handler. Indices start at 0 for each unit and increment with each added Event Handler.
+|x1= <sqf>
+this addEventHandler ["Killed", {
+	params ["_unit", "_killer"];
+	systemChat format ["%1 has been killed by %2.", _unit, _killer];
+}];
+</sqf>
+|x2= <sqs>_index = player addEventHandler ["Killed", { _this exec "playerKilled.sqs" }]</sqs>
+|seealso= [[removeEventHandler]] [[removeAllEventHandlers]] [[:Category:Event Handlers|Event Handlers]] [[addMPEventHandler]] [[addMissionEventHandler]] [[BIS_fnc_addScriptedEventHandler]] [[getEventHandlerInfo]]
+}}
+{{Note
+|user= Killzone_Kid
+|timestamp= 20150607210600
+|text= When using overridable EH, such as "InventoryOpened" and similar, where returning [[true]] allows to override default action, [[exitWith]] cannot be used to return value. So:
+<sqf>if (whatever) exitWith {true}; false;</sqf>
+Forget about it, will not work. Instead use:
+<sqf>if (whatever) then {true} else {false};</sqf>
+% satisfaction guaranteed!
+}}