ACE3/addons/core/functions/fn_addScrollWheelEventHandler.sqf

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/*
* Author: commy2
*
* Add an event handler that executes every time the scroll wheel is used. This is needed, because adding a MouseZ display event handler to display 46 will break in save games. Argument will be [Interval] where 'Interval' is a number.
*
* Argument:
* 0: Code to execute (Code or String)
*
* Return value:
* ID of the event script (used to remove it later).
*/
private ["_statement", "_actionsVar", "_id", "_actionIDs", "_actions"];
_statement = _this select 0;
if (typeName _statement == "STRING") then {
_statement = compile _statement;
};
_actionsVar = missionNamespace getVariable ["AGM_EventHandler_ScrollWheel", [-1, [], []]];
_id = (_actionsVar select 0) + 1;
_actionIDs = _actionsVar select 1;
_actions = _actionsVar select 2;
_actionIDs pushBack _id;
_actions pushBack _statement;
missionNamespace setVariable ["AGM_EventHandler_ScrollWheel", [_id, _actionIDs, _actions]];
_id