enum @beta Efl.Ui.Scrollbar_Mode
{
   [[When should the scrollbar be shown.]]
   auto = 0, [[Visible if necessary]]
   on,       [[Always visible]]
   off,      [[Always invisible]]
   last      [[For internal use only]]
}

enum @beta Efl.Ui.Scrollbar_Direction
{
   [[What kind of scrollbar is this.]]
   horizontal = 0, [[Goes along the X axis.]]
   vertical,       [[Goes along the Y axis.]]
   last            [[For internal use only]]
}
interface @beta Efl.Ui.Scrollbar
{
   [[Interface used by widgets which can display scrollbars, enabling them to contain more content
     than actually fits inside them.]]
   methods {
      @property bar_mode {
         [[Scrollbar visibility policy]]
         set {
         }
         get {
         }
         values {
            hbar: Efl.Ui.Scrollbar_Mode; [[Horizontal scrollbar.]]
            vbar: Efl.Ui.Scrollbar_Mode; [[Vertical scrollbar.]]
         }
      }
      @property bar_size {
         [[Scrollbar size.
           It is calculated based on viewport size-content sizes.
         ]] // TODO: This needs more details. What does 1.0 mean?
         get {
         }
         values {
            width: double; [[Value between 0.0 and 1.0.]]
            height: double; [[Value between 0.0 and 1.0.]]
         }
      }
      @property bar_position {
         [[Scrollbar position.
           It is calculated based on current position-maximum positions.
         ]]
         set {
         }
         get {
         }
         values {
            posx: double; [[Value between 0.0 and 1.0.]]
            posy: double; [[Value between 0.0 and 1.0.]]
         }
      }
      bar_visibility_update @protected @beta{
         [[Update bar visibility.

           The object will call this function whenever the bar
           needs to be shown or hidden.
         ]]
      }
   }
   events {
      bar,press: Efl.Ui.Scrollbar_Direction; [[Called when bar is pressed.]]
      bar,unpress: Efl.Ui.Scrollbar_Direction; [[Called when bar is unpressed.]]
      bar,drag: Efl.Ui.Scrollbar_Direction; [[Called when bar is dragged.]]
      bar,size,changed: void; [[Called when bar size is changed.]]
      bar,pos,changed: void; [[Called when bar position is changed.]]
      bar,show: Efl.Ui.Scrollbar_Direction; [[Callend when bar is shown.]]
      bar,hide: Efl.Ui.Scrollbar_Direction; [[Called when bar is hidden.]]
   }
}