CancelEvent: Difference between revisions

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==Syntax==  
==Syntax==  
<syntaxhighlight lang="lua">
<syntaxhighlight lang="lua">
bool cancelEvent ()   
bool cancelEvent (bool cancel, string reason)   
</syntaxhighlight>
</syntaxhighlight>
===Required Arguments===
*'''cancel:''' True to cancel, false to uncancel.
*'''reason:''' The reason for cancelling the event.


===Returns===
===Returns===

Revision as of 17:43, 6 February 2009

This function is used to stop the automatic internal handling of events, for example this can be used to prevent an item being given to a player when they walk over a pickup, by canceling the onPickupUse event.

cancelEvent does not have an effect on all events, see the individual event's pages for information on what happens when the event is canceled. cancelEvent does not stop further event handlers from being called, as the order of event handlers being called is undefined in many cases. Instead, you can see if the currently active event has been cancelled using wasEventCancelled.

The use of cancelEvent outside of an event handler has no effect.

If you implement your own custom events and want to handle them being cancelled, you should call wasEventCancelled to check after your call to triggerEvent.

Syntax

bool cancelEvent (bool cancel, string reason)   

Required Arguments

  • cancel: True to cancel, false to uncancel.
  • reason: The reason for cancelling the event.

Returns

Always returns true.

Example

Click to collapse [-]
Example 1 - Server

This example stops the player huntedPlayer from entering a vehicle:

-- call 'stopVehicleEntry' whenever hunterPlayer is about to enter a vehicle:
function stopVehicleEntry ( theplayer, seat, jacked )
   cancelEvent () -- stop the event from occuring
end
addEventHandler ( "onVehicleStartEnter", huntedPlayer, stopVehicleEntry )
Click to collapse [-]
Example 2 - Client

This example prevents any damage to a player clientside by making cancelEvent an event handler for the onClientPlayerDamage event.

addEventHandler ( "onClientPlayerDamage", getRootElement(), cancelEvent )

See Also