Enum ItemSize 

pub enum ItemSize {
    Fixed(f32),
    Dynamic(Callback<usize, f32>),
}

Defines how each item of a VirtualScrollView is sized along the scroll axis.

Build one from a fixed value or from a closure that resolves the size of each item by its index:

let fixed: ItemSize = 25.0f32.into();
let dynamic: ItemSize =
    (|index: usize| if index.is_multiple_of(2) { 25.0 } else { 50.0 }).into();

Variants

Fixed(f32)

Every item shares the same size in pixels.

Dynamic(Callback<usize, f32>)

Each item is sized individually through a callback that receives its index.

Trait Implementations

impl Clone for ItemSize

fn clone(&self) -> ItemSize

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for ItemSize

fn default() -> Self

Returns the “default value” for a type.

impl<F: Fn(usize) -> f32 + 'static> From<F> for ItemSize

fn from(callback: F) -> Self

Converts to this type from the input type.

impl From<f32> for ItemSize

fn from(size: f32) -> Self

Converts to this type from the input type.

impl PartialEq for ItemSize

fn eq(&self, other: &ItemSize) -> 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 ItemSize