Struct LabelLayout 

pub struct LabelLayout { /* private fields */ }

Eight candidate positions per label; unplaceable labels are explicitly omitted. Placement is greedy: accepted labels are never moved to make room for later ones. Stable ordering does not guarantee a globally optimal or temporally smooth layout.

use motion_content::prelude::*;
use motion_core::prelude::*;
use motion_core::{
    DisplayList, RasterLimits, ResourceStore, ValidatedDisplayList, MAX_PATH_VERBS,
    MAX_STROKE_VERBS, MAX_SVG_PATH_BYTES, sample_offsets,
};
use motion_render::{Composition, RenderPrepare, RenderOptions, BackendKind, render_still};
use motion_content::diagram::*;
let labels = [Label::new(Point::new(50.0, 50.0), Size::new(40.0, 30.0))];
let positions = LabelLayout::new(Rect::new(0.0, 0.0, 100.0, 100.0))
    .gap(2.0)
    .place(&labels)?;
assert_eq!(positions, [Some(Rect::new(52.0, 18.0, 92.0, 48.0))]);

Implementations

impl LabelLayout

pub fn new(bounds: Rect) -> Self

Creates a placement viewport with a four-pixel separation.

pub fn gap(self, pixels: f64) -> Self

Replaces finite spacing in 0..=1024 pixels.

pub fn obstacle(self, bounds: Rect) -> Self

Adds fixed artwork to avoid; at most 256 obstacles are accepted by place.

pub fn place( &self, labels: &[Label], ) -> Result<Vec<Option<Rect>>, ValidationError>

Returns positions in input order. None means no collision-free candidate fits. Placement is stateless and bounded to 256 labels and 256 obstacles. Invalid geometry, nonpositive label/viewport dimensions, invalid spacing or exceeded counts return std::io::ErrorKind::InvalidInput, not omitted labels.

Trait Implementations

impl Clone for LabelLayout

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LabelLayout

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

Formats the value using the given formatter.