ULimenListenForKeyInput

Overview

ULimenListenForKeyInput is an asynchronous action class designed to listen for a specified key press by a player controller. It provides callbacks for when the correct key is pressed, when any other key is pressed, and when the timeout expires. This class extends UBlueprintAsyncActionBase, making it suitable for use in Blueprints.

Properties

Type	Name	Access	Description
TWeakObjectPtr	PlayerController	Private	The player controller to listen for key input.
FKey	Key	Private	The key to listen for.
FDelegateHandle	WorldTickHandle	Private	Delegate handle for the world tick event.
float	Timeout	Private	The timeout duration in seconds.
bool	bUseTimeout	Private	Flag indicating whether a timeout is enabled.
FListenForKeyInputDelegate	OnKeyPressed	Private	Delegate called when the correct key is pressed.
FListenForKeyInputDelegate	OnWrongKeyPressed	Private	Delegate called when any other key is pressed.
FListenForKeyInputDelegate	OnTimeout	Private	Delegate called when the timeout expires.

Functions

Return Type	Signature	Description
ULimenListenForKeyInput*	ListenForKeyInput(UObject* WorldContext, APlayerController* InPlayerController, const FKey& InKey, float InTimeout, FListenForKeyInputDelegate OnKeyPressed, FListenForKeyInputDelegate OnWrongKeyPressed, FListenForKeyInputDelegate OnTimeout)	Static function to create and activate a new instance of `ULimenListenForKeyInput`.
void	Activate()	Activates the async action. Sets up the key listening logic and timeout handling.
void	WorldTick(UWorld* World, ELevelTick LevelTick, float DeltaTime)	Handles the world tick event to check for key presses and timeouts.

Usage & Implementation Notes

Threading Constraints: This class operates on the game thread.
Replication Requirements: None.
Memory Lifetime Management: The instance is managed by Unreal Engine's garbage collection system.
Initialization Dependencies: Requires a valid APlayerController and a key to listen for.

22 May 2026