interface IController {
	void SetHandler( Action<Event> );
	void Update(); // invoked from the game loop, spams SetHandler for polling-type controllers
}

class KeyboardController : IController { // probably reacts immediately to form events
	public KeyboardController( Form listento ) {
		...
	}
	...
}

class XInputController : IController { // probably polls controller on this.Update();
	public XInputController( SlimDX.XInput.Controller ) {
		...
	}
	...
}

class Event {
	public virtual bool IsLocal { get { return false; }}
}

enum MenuNavigationType { Select, Cancel, Previous, Next, Increase, Decrease }

class MenuNavigationEvent : Event {
	public override bool IsLocal { get { return true; }}
	public MenuNavigationType Type;
}

class UpdateGameControlsEvent : Event {
	public int ControlledObjectID;
	public Vector2 Manuvering, Aim;
	public bool Fire1, Fire2;
	// ...
}