alphabetDirection property
二维中的两个基本方向。
轴总是相对于当前坐标空间。这意味着，例如，horizontal 轴实际上可能是从
右上角到左下角的对角线，这是由于对场景应用了一些局部 Transform。
The two cardinal directions in two dimensions.
The axis is always relative to the current coordinate space. This means, for
example, that a horizontal axis might actually be diagonally from top
right to bottom left, due to some local Transform applied to the scene.
See also:
- AxisDirection, which is a directional version of this enum (with values light left and right, rather than just horizontal).
- TextDirection, which disambiguates between left-to-right horizontal content and right-to-left horizontal content.
Implementation
final Axis alphabetDirection;