For a page wide listener, you want to take a look at Event. AddNativePreviewHandler . Attaching a keyup listener there should give you the effect you want.
Modifing the snippet here should get you started.
I think you could do that with KeyboardListener.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.