OK, I couldn't find the original thread, where we talked about this. Did I ever say, that board-search really, really sucks in SMF? If I didn't, I will do it again

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I have made the Button Widget responsive for the LEFT, RIGHT, UP and DOWN arrow keys as well as the SPACE and ENTER keys. Pressing the arrow keys on a focussed button will cause the next focusable Widget to be focused, which is closest in the requested direction.
ENTER and SPACE will fire the onClicked event of the current focussed button.
Of course this works perfectly in the HUD MenuSystem.
Marvin