Whether the Scrollbar should be interactive and respond to dragging on the thumb, or tapping in the track area.
Does not apply to the CupertinoScrollbar, which is always interactive to match native behavior. On Android, the scrollbar is not interactive by default.
When false, the scrollbar will not respond to gesture or hover events, and will allow to click through it.
Defaults to true when null, unless on Android, which will default to false when null.
- RawScrollbarState.enableGestures, an overridable getter which uses this value to override the default behavior.
final bool? interactive;