In GWT, how do I get a keypress?

I'm making a game and would like to know how I get a keypress event. All the examples I have seen are using textboxes to register a key handler bu开发者_运维百科t I don't think I need to do that. I just want to get key events for up,down,left,right to move a character.

You can wrap whatever you are using for your display in a FocusPanel. FocusPanel's can pick up on keyboard and mouse events. Just add the handlers as needed.

Yes, to expand upon what G. Davis said, in GWT to receive general input events (such as from the Mouse or Keyboard) you put your game content inside of a FocusPanel. That object then will fire any input events which occur within that panel. (So you should have all of your game content as a child of the parent FocusPanel.)

A gotcha worth pointing out is that non-printable characters, such as KEY_LEFT or KEY_ESCAPE, cannot be caught via the onKeyPressed event and can only reliably be caught with the onKeyDown event. See KeyboardListener.