Bind trigger_event (an ETriggerEvent value) of action on actor’s
Enhanced Input component to actor’s UFUNCTION function (its UE name),
which takes no parameters, or (FInputActionValue, f32 elapsed seconds, f32 triggered seconds, InputAction) or a leading part of it: the C++
EnhancedInputComponent->BindAction(Action, TriggerEvent, this, &AFoo::Function).
Whether the platform shows touch controls: the C++
SVirtualJoystick::ShouldDisplayTouchInterface(), true on mobile, with
bAlwaysShowTouchInterface in the input settings, or when faked touch
events (Use Mouse for Touch) are set to display them.