Struct Constraints 

pub struct Constraints {
    pub min: Size,
    pub max: Size,
}

Min and max bounds a parent gives a child during the measure pass.

Children should return a size satisfying min <= size <= max on both axes. The UNBOUNDED sentinel in a max field means “as much as you want.”

Fields

min: Size

Minimum size the child must produce.

max: Size

Maximum size the child may produce.

Implementations

impl Constraints

pub const fn loose(max: Size) -> Self

Constraints permitting any size up to max.

pub const fn tight(size: Size) -> Self

Constraints requiring exactly size.

pub const fn new(min: Size, max: Size) -> Self

Constraints permitting min..=max.

pub const fn unbounded() -> Self

Constraints from zero up to UNBOUNDED on both axes.

pub fn clamp(&self, size: Size) -> Size

Clamp size to fall within the constraints on both axes.

pub fn with_width(self, w: u32) -> Self

Constraints with max.width = w. min.width is also clamped to w to preserve min <= max.

pub fn with_height(self, h: u32) -> Self

Constraints with max.height = h. min.height is also clamped.

pub fn shrink(self, dx: u32, dy: u32) -> Self

Subtract dx, dy from both min and max (saturating). Used to apply padding before measuring a child.

Trait Implementations

impl Clone for Constraints

fn clone(&self) -> Constraints

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Constraints

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

Formats the value using the given formatter.

impl Default for Constraints

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Constraints

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

impl Eq for Constraints

impl StructuralPartialEq for Constraints