Struct VirtualScroll 

pub struct VirtualScroll {
    pub item_height: f32,
    pub viewport_height: f32,
    pub scroll_offset: f32,
    pub overscan: usize,
}

Configuration for windowed rendering of a fixed-height-item list. Set via NodeRef::virtual_scroll.

Fields

item_height: f32

Height (in the backend’s own units — px for DOM/canvas) of a single item.

viewport_height: f32

Height of the scrollable viewport.

scroll_offset: f32

Current scroll position, measured from the top of the full (unvirtualized) list. Backends update this from their own scroll event and feed it back in on the next render.

overscan: usize

Extra items rendered above/below the visible window to avoid a blank flash during fast scrolling.

Implementations

impl VirtualScroll

pub fn new(item_height: f32, viewport_height: f32) -> Self

pub fn with_offset(self, offset: f32) -> Self

pub fn with_overscan(self, overscan: usize) -> Self

pub fn visible_range(&self, total_items: usize) -> VisibleRange

Computes which item indices (of total_items) fall within the viewport plus overscan, and the pixel-height spacers needed above/ below that window so the scrollable area’s total height (and thus scrollbar behavior) still matches the full, unvirtualized list.

Trait Implementations

impl Clone for VirtualScroll

fn clone(&self) -> VirtualScroll

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for VirtualScroll

impl Debug for VirtualScroll

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for VirtualScroll

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for VirtualScroll

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for VirtualScroll

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for VirtualScroll