ScrollDirection enum
The direction of a scroll, relative to the positive scroll offset axis given by an AxisDirection and a GrowthDirection.
This contrasts to GrowthDirection in that it has a third value, idle, for the case where no scroll is occurring.
This is used by RenderSliverFloatingPersistentHeader to only expand when the user is scrolling in the same direction as the detected scroll offset change.
Constants
- forward → const ScrollDirection
-
Scrolling is happening in the positive scroll offset direction.
For example, for the GrowthDirection.forward part of a vertical AxisDirection.down list, this means the content is moving up, exposing lower content.
const ScrollDirection(1) - idle → const ScrollDirection
-
No scrolling is underway.
const ScrollDirection(0) - reverse → const ScrollDirection
-
Scrolling is happening in the negative scroll offset direction.
For example, for the GrowthDirection.forward part of a vertical AxisDirection.down list, this means the content is moving down, exposing earlier content.
const ScrollDirection(2) -
values
→ const List<
ScrollDirection> -
A constant List of the values in this enum, in order of their declaration.
const List<ScrollDirection>
Properties
Methods
-
toString(
) → String -
Returns a string representation of this object.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited