Struct LayoutState 

pub struct LayoutState {
    pub measurement_constraints: Constraints,
    pub content_offset: Point,
    /* private fields */
}

Retained layout state for a LayoutNode. This mirrors Jetpack Compose’s approach where each node stores its own measured size and placed position, eliminating the need for per-frame LayoutTree reconstruction.

Fields

measurement_constraints: Constraints

The constraints used for the last measurement.

content_offset: Point

Offset of the content box relative to the node origin (e.g. due to padding).

Implementations

impl LayoutState

pub fn size(&self) -> Size

pub fn position(&self) -> Point

pub fn is_placed(&self) -> bool

pub fn set_size(&mut self, size: Size)

Writes the measured size, self-reporting an actual change to the scene phase.

pub fn place(&mut self, position: Point)

Writes the placed position and marks the node placed, self-reporting an actual move to the scene phase.

pub fn clear_placed(&mut self)

Clears the placed flag at the start of a layout pass.

Trait Implementations

impl Clone for LayoutState

fn clone(&self) -> LayoutState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LayoutState

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

Formats the value using the given formatter.

impl Default for LayoutState

fn default() -> Self

Returns the “default value” for a type.