Why is FTickableGameObject::Tick() being called in the editor?

Development Programming & Scripting
3

So, some investigation found the answer to this pretty quickly, but it seems like a bug to me. Probably “legacy” behaviour.

Overriding IsTickableInEditor() to return false will not work because of this bit of code, I believe:

bool bTickIt = TickableObject->IsTickable() && 
(
	(TickType != LEVELTICK_TimeOnly && !bIsPaused) ||
	(bIsPaused && TickableObject->IsTickableWhenPaused()) ||
	(GIsEditor && !IsPlayInEditor() && TickableObject->IsTickableInEditor())
);

in LevelTick.cpp. As you can see that OR makes it behave strangely.

The solution I came up with:

virtual bool IsTickable() const override { return (!GWorld->HasBegunPlay() && GIsEditor) ? false : true; }

If we’re in the editor, and NOT playing, don’t tick. Otherwise, tick.