Struct ScrollState 

pub struct ScrollState {
    pub index: Option<usize>,
    pub align: ScrollAlignment,
    pub behavior: ScrollBehavior,
    pub started_at: f64,
    pub last_target_offset: f64,
    pub stable_frames: u32,
}

Internal state for an active programmatic scroll operation.

Tracks the target, alignment, behavior, and settling progress of an in-flight scroll reconciliation loop. Used by the virtualizer to determine when a smooth scroll has reached its destination.

Fields

index: Option<usize>

The target item index, if scrolling to a specific item.

align: ScrollAlignment

The alignment used for this scroll operation.

behavior: ScrollBehavior

The animation behavior for the scroll.

started_at: f64

Timestamp (ms) when this scroll operation started.

last_target_offset: f64

The last computed target scroll offset.

stable_frames: u32

Number of consecutive frames where the scroll position matched the target (used for settling detection).

Implementations

impl ScrollState

pub fn new( index: Option<usize>, align: ScrollAlignment, behavior: ScrollBehavior, started_at: f64, last_target_offset: f64, ) -> Self

Creates a new scroll state for a programmatic scroll operation.

Parameters

• index: Optional target item index.
• align: The alignment for the scroll.
• behavior: The animation behavior.
• started_at: Timestamp when the scroll started.
• last_target_offset: The initial target scroll offset.

Trait Implementations

impl Clone for ScrollState

fn clone(&self) -> ScrollState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScrollState

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

Formats the value using the given formatter.

impl PartialEq for ScrollState

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ScrollState