Struct LayoutSizeHint 

pub struct LayoutSizeHint {
    pub min: u16,
    pub preferred: u16,
    pub max: Option<u16>,
}

Size hint returned by measurer callbacks for intrinsic sizing.

This is a 1D projection of a widget’s size constraints along the layout axis. Use with Flex::split_with_measurer for content-aware layouts.

Example

use ftui_layout::LayoutSizeHint;

// A label that needs 5-20 cells, ideally 15
let hint = LayoutSizeHint {
    min: 5,
    preferred: 15,
    max: Some(20),
};

// Clamp allocation to hint bounds
assert_eq!(hint.clamp(10), 10); // Within range
assert_eq!(hint.clamp(3), 5);   // Below min
assert_eq!(hint.clamp(30), 20); // Above max

Fields

min: u16

Minimum size (widget clips below this).

preferred: u16

Preferred size (ideal for content).

max: Option<u16>

Maximum useful size (None = unbounded).

Implementations

impl LayoutSizeHint

pub const ZERO: Self

Zero hint (no minimum, no preferred, unbounded).

pub const fn exact(size: u16) -> Self

Create an exact size hint (min = preferred = max).

pub const fn at_least(min: u16, preferred: u16) -> Self

Create a hint with minimum and preferred size, unbounded max.

pub fn clamp(&self, value: u16) -> u16

Clamp a value to this hint’s bounds.

Trait Implementations

impl Clone for LayoutSizeHint

fn clone(&self) -> LayoutSizeHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LayoutSizeHint

impl Debug for LayoutSizeHint

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

Formats the value using the given formatter.

impl Default for LayoutSizeHint

fn default() -> LayoutSizeHint

Returns the “default value” for a type.

impl Eq for LayoutSizeHint

impl PartialEq for LayoutSizeHint

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