root_window.unbind("c")
root_window.unbind("i")
root_window.unbind("I")

root_window.bind("c", lambda event: jog_cycle())

def jog_cycle():
	
	global jogincr_index_last

	jogincr_size = int(root_window.call(widgets.jogincr._w, "list", "size"))
	
	cursel = root_window.call(widgets.jogincr._w, "curselection")
	if type(cursel) == tuple: cursel = cursel[0]
	if cursel == "":
		cursel = 0
	else:
		cursel = int(cursel)
		
	if cursel < jogincr_size - 1:
		jogspeed_incremental(+1)
	else:
		jogincr_index_last = 1
		jogspeed_continuous()