Enum Dimension 

#[non_exhaustive]
pub enum Dimension {
    Px(i32),
    Pct(u16),
    Content,
}

A size value for width or height: pixel-fixed, percent-of-parent, or content-sized.

Resolution rules (LPAR-10 §5.C):

1. Px(n): resolved size = n, clamped by min/max.
2. Pct(p): resolved size = (parent_content × p) / 100, clamped by min/max. Percent references the parent’s content area (resolved size minus padding), matching LVGL’s lv_pct semantics.
3. Content: resolved size = bounding box of laid-out children plus own padding. Children are resolved first to avoid circular dependencies.

Registration policy

Standards Action — Dimension is a cross-phase contract. Adding a variant (e.g., viewport-relative) requires a §15 amendment to LPAR-10.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Px(i32)

Fixed pixel size.

Pct(u16)

Percentage of the parent’s content-area dimension (0–100+).

Content

Size to the bounding box of laid-out children (LV_SIZE_CONTENT analogue).

Trait Implementations

impl Clone for Dimension

fn clone(&self) -> Dimension

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Dimension

impl Debug for Dimension

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

Formats the value using the given formatter.

impl Default for Dimension

fn default() -> Self

Default is Px(0) — callers substitute the widget’s intrinsic size when constructing ItemHints.

impl Eq for Dimension

impl PartialEq for Dimension

fn eq(&self, other: &Dimension) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Dimension