Struct AppContextTextMeasurer 

pub struct AppContextTextMeasurer;

Measures draw-scope text against the app’s fonts.

Every call lands in super::measure_text, which is the same entry point the Text composable’s layout uses and is backed by the app context’s metrics cache — so measuring an unchanged string every frame is a hash lookup, not a shaping pass.

Implementations

impl AppContextTextMeasurer

pub fn shared() -> Rc<dyn DrawTextMeasurer>

A shared measurer to hand to DrawScopeDefault::with_text_measurer.

Trait Implementations

impl Clone for AppContextTextMeasurer

fn clone(&self) -> AppContextTextMeasurer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AppContextTextMeasurer

impl Debug for AppContextTextMeasurer

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

Formats the value using the given formatter.

impl Default for AppContextTextMeasurer

fn default() -> AppContextTextMeasurer

Returns the “default value” for a type.

impl DrawTextMeasurer for AppContextTextMeasurer

fn measure_text(&self, text: &str, style: &DrawTextStyle) -> TextMeasurement