A Boolean that indicates whether the scroll view uses a predominant scrolling axis for content.
- macOS 10.7+
Some content is scrollable in both the horizontal and vertical axes, but is predominantly scrolled one axis at a time. Other content (such as a drawing canvas) should scroll freely in both axes.
Traditionally this is not an issue with scroll wheels since they can only scroll in one direction at a time. With scroll balls and touch surfaces, it becomes more difficult to determine the user's intention.
This property helps a scroll view determine the user's intention by specifying if there is a predominant scrolling axis for content.
When the value of this property is
YES, the scroll view uses a predominant scrolling access. The default value of this property is