(defwindow volume-popup []
  :monitor 0
  :stacking "overlay"
  :namespace "volume-popup"
  :focusable false
  :exclusive false
  :geometry (geometry :width 180
                      :anchor "top center"
                      :y "10px")

  (box :class "volume-popup"
    (output-slider)
    (source-slider)
  )
)