struct IInputEventListener {
};

IInput.h

Input event listeners registered to input system and receive input events when they are generated.

virtual ~IInputEventListener();

Used to sort the listeners based on priority

virtual int GetPriority() const;

It returns priority associated with the listener (Higher the priority, the earlier it will be processed relative to other listeners, default = 0)

Called every time input event is generated.

virtual bool OnInputEvent(const SInputEvent & event) = 0;

If it returns True then the broadcasting of this event should be aborted and the rest of input listeners should not receive this event.

virtual bool OnInputEventUI(const SInputEvent & event);