Enum Constraint 

pub enum Constraint {
    Fixed(u16),
    Percentage(f32),
    Min(u16),
    Max(u16),
    Ratio(u32, u32),
    Fill,
    FitContent,
    FitContentBounded {
        min: u16,
        max: u16,
    },
    FitMin,
}

A constraint on the size of a layout area.

Variants

Fixed(u16)

An exact size in cells.

Percentage(f32)

A percentage of the total available size (0.0 to 100.0).

Min(u16)

A minimum size in cells.

Max(u16)

A maximum size in cells.

Ratio(u32, u32)

A ratio of the remaining space (numerator, denominator).

Fill

Fill remaining space (like Min(0) but semantically clearer).

FitContent

Size to fit content using widget’s preferred size from LayoutSizeHint.

When used with Flex::split_with_measurer, the measurer callback provides the size hints. Falls back to Fill behavior if no measurer is provided.

FitContentBounded

Fit content but clamp to explicit bounds.

The allocated size will be between min and max, using the widget’s preferred size when within range.

Fields

min: u16

Minimum allocation regardless of content size.

max: u16

Maximum allocation regardless of content size.

FitMin

Use widget’s minimum size (shrink-to-fit).

Allocates only the minimum space the widget requires.

Trait Implementations

impl Clone for Constraint

fn clone(&self) -> Constraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Constraint

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

Formats the value using the given formatter.

impl PartialEq for Constraint

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

impl StructuralPartialEq for Constraint