Enum Length 

pub enum Length {
    Fixed(u32),
    Shrink,
    Fill,
    FillPortion(u32),
}

Per-axis sizing intent. Pattern modeled on iced / libcosmic.

Containers use this to decide how much room each child gets before they call measure and arrange.

Variants

Fixed(u32)

Take exactly this many pixels.

Shrink

Ask the child what it wants (calls measure with loose constraints) and give it that.

Fill

Take all remaining space. Equivalent to FillPortion(1).

FillPortion(u32)

Take a share of remaining space proportional to portion. Multiple FillPortion (and Fill) siblings split the residual in proportion to their portion sums.

Implementations

impl Length

pub fn fixed(self) -> Option<u32>

Returns the explicit pixel count if this is Fixed, else None. Convenience for the common “is this a fixed slot” check during container layout.

pub fn portion(self) -> u32

Portion weight for Fill / FillPortion. 0 for non-flex variants.

pub fn resolve(self, intrinsic: u32, max: u32) -> u32

Resolve to a concrete pixel count given the widget’s intrinsic size on this axis and the max available from constraints.

Trait Implementations

impl Clone for Length

fn clone(&self) -> Length

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Length

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

Formats the value using the given formatter.

impl From<i32> for Length

fn from(n: i32) -> Self

Converts to this type from the input type.

impl From<u16> for Length

fn from(n: u16) -> Self

Converts to this type from the input type.

impl From<u32> for Length

fn from(n: u32) -> Self

Converts to this type from the input type.

impl From<usize> for Length

fn from(n: usize) -> Self

Converts to this type from the input type.

impl PartialEq for Length

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

impl Eq for Length

impl StructuralPartialEq for Length