reactions += {
    case e: MouseEvent.Drag if enabled =>
      if (e.lastButton == MouseButton.Left && clicked) {
        scrollerPos = clamp(e.pos)
      }
    case e: MouseEvent.Click if enabled => clicked = scrollerBounds.contains(local(e.pos))
      if (!clicked && hovered(e.pos))
        scrollerPos = clamp(e.pos)
    case e: MouseEvent.Scroll if enabled =>
      if (hovered(e.pos)) {
        scroll(e.direction)
      }
  }