UAttemptStateTransitionProxy

Summary

The UAttemptStateTransitionProxy class provides a Blueprint-friendly, event-driven proxy to handle state transitions in the UGameStateManagerComponent. It allows developers to attempt a state transition and react to state lifecycle events (entered, updated, exited) using Blueprint delegates without manually binding to individual state events.

This is particularly useful for asynchronous or conditional state management in gameplay, UI, or experimental simulations.

Core Features

• Automatically handles delegate binding for a single state transition.
• Broadcasts OnStateEntered, OnStateUpdated, and OnStateExited events.
• Supports BlueprintCallable creation through CreateProxyObjectForAttemptStateTransition.
• Cleans up delegates automatically when the transition completes or the object is destroyed.

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Functions

CreateProxyObjectForAttemptStateTransition

UFUNCTION(BlueprintCallable, meta = (BlueprintInternalUseOnly = "true"))
static UAttemptStateTransitionProxy* CreateProxyObjectForAttemptStateTransition(
    UGameStateManagerComponent* GameStateManagerComponent,
    UStateObject* TargetState);

Description: Creates a proxy object to attempt a state transition. Automatically binds to the state’s lifecycle events and broadcasts them via Blueprint delegates.

Parameters:

Name	Type	Description
GameStateManagerComponent	UGameStateManagerComponent*	The component managing the root state object.
TargetState	UStateObject*	The state to attempt to transition into.

Example (Blueprint):

CreateProxyObjectForAttemptStateTransition(StateManager, TargetState)
    -> Bind OnStateEntered, OnStateUpdated, OnStateExited

Behaviour:

• Attempts the state transition immediately.
• If successful, binds to the TargetState events.
• If unsuccessful, logs a warning and does not bind events.

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OnStateEnteredReceived

UFUNCTION()
void OnStateEnteredReceived();

Description: Internal function that triggers the OnStateEntered delegate when the state has been successfully entered.

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OnStateUpdatedReceived

UFUNCTION()
void OnStateUpdatedReceived();

Description: Internal function that triggers the OnStateUpdated delegate whenever the state is updated.

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OnStateExitedReceived

UFUNCTION()
void OnStateExitedReceived();

Description: Internal function that triggers the OnStateExited delegate and unbinds all previously bound delegates.

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BeginDestroy

virtual void BeginDestroy() override;

Description: Cleans up all delegate bindings when the proxy object is destroyed to prevent dangling references.

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Delegates

Delegate	Description
OnStateEntered	Triggered when the target state is entered successfully.
OnStateUpdated	Triggered every time the target state updates.
OnStateExited	Triggered when the target state exits and cleans up bindings.

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Usage Summary

1. Call CreateProxyObjectForAttemptStateTransition with a state manager and target state.
2. Bind to the OnStateEntered, OnStateUpdated, and OnStateExited delegates.
3. The proxy will handle the transition and broadcast events automatically.
4. No need to manually unbind events; the proxy does it safely.