Enum LengthBase

pub enum LengthBase {
    Px(f32),
    Vw(f32),
    Vh(f32),
    Vmin(f32),
    Vmax(f32),
    Em(f32),
}

One of the pure relative-or-absolute modes a Length can carry. Split out so Length itself can stay Copy while still supporting optional clamp bounds — the recursive Clamp variant of the original sketch would have forced a Box allocation, which on a widget tree that builds these values per frame is the wrong trade.

Variants

Px(f32)

Absolute, in logical pixels.

Vw(f32)

Percentage of the viewport’s width (Vw(10.0) == 10 % of width).

Vh(f32)

Percentage of the viewport’s height.

Vmin(f32)

Percentage of the viewport’s smaller dimension. The right default for typography and gutters that must survive a portrait/landscape rotation without growing absurd.

Vmax(f32)

Percentage of the viewport’s larger dimension.

Em(f32)

Multiple of the root font size (typographic hierarchy: a heading of Em(2.0) is twice the body size, regardless of viewport).

Trait Implementations

impl Clone for LengthBase

fn clone(&self) -> LengthBase

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LengthBase

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

Formats the value using the given formatter.

impl From<LengthBase> for Length

fn from(base: LengthBase) -> Self

Converts to this type from the input type.

impl PartialEq for LengthBase

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

impl StructuralPartialEq for LengthBase