Maintenance script: UI Lua API import (WAR 1.4.8)

2026-10-16T19:52:15Z

UI Lua API import (WAR 1.4.8)

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{{LuaApi|group=Window}}
Removes the Lua handler of one of a window's core events.

<pre>
WindowUnregisterCoreEventHandler(windowName, eventName)
</pre>

== Arguments ==
;windowName : <code>string</code> – Name of the window.
;eventName : <code>string</code> – Name of the core event, for example <code>"OnMouseWheel"</code>. See [[API:WindowRegisterCoreEventHandler|WindowRegisterCoreEventHandler]] for the list.

== Returns ==
Nothing.

== Details ==
* Removes the handler whether it was set in the window's XML or with [[API:WindowRegisterCoreEventHandler|WindowRegisterCoreEventHandler]].
* If the window has no handler for the event, nothing happens.
* Unlike [[API:WindowRegisterCoreEventHandler|WindowRegisterCoreEventHandler]], an unknown event name raises an error here.
* The function needs at least two arguments and only reads the last two.

== Errors ==
* <code>Error in function call 'WindowUnregisterCoreEventHandler': Window %s does not exist</code>
* <code>Error in function call 'WindowUnregisterCoreEventHandler': Bad Event: %s does not exist</code>

== Example ==
Leaving key-binding mode, from <code>ea_keymappingwindow/source/keymappingwindow.lua</code>:
<pre>
WindowUnregisterCoreEventHandler( KeyMappingWindow.bindingButtonName, "OnRawDeviceInput" )
WindowUnregisterEventHandler( KeyMappingWindow.bindingButtonName, SystemData.Events.L_BUTTON_UP_PROCESSED )
WindowUnregisterEventHandler( KeyMappingWindow.bindingButtonName, SystemData.Events.M_BUTTON_UP_PROCESSED )
WindowUnregisterEventHandler( KeyMappingWindow.bindingButtonName, SystemData.Events.R_BUTTON_UP_PROCESSED )
WindowUnregisterCoreEventHandler( "KeyMappingWindowActionsList", "OnMouseWheel" )
</pre>

== See also ==
* [[API:WindowRegisterCoreEventHandler|WindowRegisterCoreEventHandler]]
* [[API:WindowUnregisterEventHandler|WindowUnregisterEventHandler]]

API:WindowUnregisterCoreEventHandler - Revision history

Maintenance script: UI Lua API import (WAR 1.4.8)