Khan/canvas-editor — pull request #155 by phleet (2012-05-15 15:12:19+00:00)
Title: Scrubber

Moving left/right controls base increment/decrement.
Moving up and down controls the size of each increment (always powers of 10).

Leaving the arrow'd tooltip visible while you're dragging looks a little silly, and using ui.draggable for this seems like a little overkill, but this works and feels pretty good.