GdkScrollDirection

enum Gdk.ScrollDirection

Specifies the direction for scroll events.

Name	Description
`GDK_SCROLL_UP`	The surface is scrolled up.
`GDK_SCROLL_DOWN`	The surface is scrolled down.
`GDK_SCROLL_LEFT`	The surface is scrolled to the left.
`GDK_SCROLL_RIGHT`	The surface is scrolled to the right.
`GDK_SCROLL_SMOOTH`	The scrolling is determined by the delta values in scroll events. See `gdk_scroll_event_get_deltas()`