Enum ScrollDirection 

pub enum ScrollDirection {
    Idle,
    Forward,
    Reverse,
}

The sliver protocol a scrolling viewport lays its children out with — a widget implements SliverWidget and overrides Widget::as_sliver to answer SliverConstraints with a SliverGeometry; a viewport lays such a child out through ChildPod::layout_sliver_child. Lifted so an app’s own sliver needs no direct frust-core dependency. The direction the user is currently scrolling in, relative to the content — Flutter’s ScrollDirection (rendering/viewport_offset.dart).

Variants

Idle

Not scrolling, or the direction is unknown.

Forward

Scrolling toward the content’s start (the scroll offset is decreasing).

Reverse

Scrolling toward the content’s end (the scroll offset is increasing).

Trait Implementations

impl Clone for ScrollDirection

fn clone(&self) -> ScrollDirection

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ScrollDirection

impl Debug for ScrollDirection

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for ScrollDirection

fn default() -> ScrollDirection

Returns the “default value” for a type.

impl Eq for ScrollDirection

impl Hash for ScrollDirection

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ScrollDirection

fn eq(&self, other: &ScrollDirection) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ScrollDirection