Comment 8 for bug 1566172

Daniel - This is OSK specific, the final implementation of this doesn't interfere with normal space input (it activates only on a long press on the OSK's spacebar), there's a slightly old video of this functionality in action here: https://www.youtube.com/watch?v=3FYbtyweMs8 (the visuals and some of the movement thresholds have changed a bit since that video was taken but the broad idea remains the same). It's currently in silo 2386 if you fancy playing with it yourself.