Read any key pressed.

Im writting plugin which reacts when user press key. Using 

TypedHandlerDelegate, BackspaceHandlerDelegate and EnterHandlerDelegateAdapter 

I can do this for character keys, backspace and enter, but i need it to react to every key. 
Is there simple way to react to every key? Or do I have to override more handlers?
But then i could not find any handler for some of the keys.