Struct TextMeasure 

pub struct TextMeasure { /* private fields */ }

The width a run of text lays out to, shaped exactly as TextLayer draws it: the system sans-serif family, advanced shaping, one line.

GPU-free — it owns a font system and nothing else — so layout that depends on a measurement can be tested without a device. The fonts are the machine’s, so a width is only ever compared against another width from the same measurer, never against a written-down number.

Implementations

impl TextMeasure

pub fn new() -> Self

A measurer over the system’s fonts. Loads the font set, which is slow; build one and keep it.

pub fn width(&mut self, text: &str, size: f32) -> f32

The laid-out width of text at size device pixels. 0.0 for an empty string or a size that is not positive and finite.

pub fn fit<'a>( &mut self, text: &'a str, size: f32, max_width: f32, ) -> Cow<'a, str>

text shortened to fit max_width at size, with an ASCII ellipsis — fit_width over this measurer.

Trait Implementations

impl Default for TextMeasure

fn default() -> Self

Returns the “default value” for a type.