Struct LayoutCtx 

pub struct LayoutCtx<'a> {
    pub constraints: Constraints,
    pub font: &'a FontCache,
    pub theme: &'a ThemeData,
}

Context passed to every widget’s Widget::layout call.

Carries the available constraints plus font and theme access so that widgets can measure text accurately without relying on character-count heuristics.

Fields

constraints: Constraints

font: &'a FontCache

theme: &'a ThemeData

Implementations

impl<'a> LayoutCtx<'a>

pub fn new( constraints: Constraints, font: &'a FontCache, theme: &'a ThemeData, ) -> Self

pub fn with_constraints(&self, constraints: Constraints) -> LayoutCtx<'_>

Derive a child context with tighter constraints (font/theme are shared).