#CanvasHandle
A nice easy grab-drag-drop handle for Canvas. For example usage, see here.
##Constructor Params ###canvas
- The canvas to which the handle belongs.
###pos
- An array, [x,y], of the initial position of the handle on the canvas.
###grabRadius
- The radius within which the handle will be grabbed by mousedown events.
##Properties ###pos
- The current position of the handle.
###deltaPos
- The handle's most recent displacement.
###mouseDownPos
- The location of the most recent mouse event.
##Method Hooks ###grab
- Fires when the handle registers a mousedown event on the canvas within grabRadius of itself.
###move
- Fires on mousemove if the handle is being held.
###drop
- Fires when the handle is dropped.