ui.png
size: 32,128
format: RGBA8888
filter: Nearest,Nearest
repeat: none
slider
  rotate: false
  xy: 2, 2
  size: 20, 20
  split: 8, 8, 8, 8
  orig: 20, 20
  offset: 0, 0
  index: -1
slider-bar
  rotate: false
  xy: 2, 24
  size: 20, 40
  orig: 20, 40
  offset: 0, 0
  index: -1