Enum VirtualAnchorPolicy 

pub enum VirtualAnchorPolicy {
    ViewportFraction {
        y_fraction: f32,
    },
    FirstVisible,
    LastVisible,
}

Policy used to pick the next dynamic virtual-list anchor after each layout pass. The previous anchor solves the current frame; this policy rebases the next frame onto a coherent in-viewport row point.

Variants

ViewportFraction

Pick the row point nearest y_fraction through the viewport. 0.0 is the top, 1.0 is the bottom. Good default for feeds.

Fields

y_fraction: f32

FirstVisible

Prefer the first fully visible row; fall back to the first partially visible row.

LastVisible

Prefer the last fully visible row; fall back to the last partially visible row.

Trait Implementations

impl Clone for VirtualAnchorPolicy

fn clone(&self) -> VirtualAnchorPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VirtualAnchorPolicy

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

Formats the value using the given formatter.

impl Default for VirtualAnchorPolicy

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for VirtualAnchorPolicy

fn eq(&self, other: &VirtualAnchorPolicy) -> 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 Copy for VirtualAnchorPolicy

impl StructuralPartialEq for VirtualAnchorPolicy