axisDirection property
final
The direction in which this widget scrolls.
For example, if the axisDirection is AxisDirection.down, increasing the scroll position will cause content below the bottom of the viewport to become visible through the viewport. Similarly, if axisDirection is AxisDirection.right, increasing the scroll position will cause content beyond the right edge of the viewport to become visible through the viewport.
Defaults to AxisDirection.down.
Implementation
final AxisDirection axisDirection