Struct CollapsingSection 

pub struct CollapsingSection<'a> { /* private fields */ }

A collapsible content section.

CollapsingSection::new("advanced", "Show advanced options").show(ui, |ui| {
    ui.label("…hidden until expanded…");
});

Implementations

impl<'a> CollapsingSection<'a>

pub fn new(id_salt: impl Hash, label: impl Into<WidgetText>) -> Self

Create a collapsing section keyed by id_salt with the given header label. The section is closed by default.

pub fn open(self, open: &'a mut bool) -> Self

Bind the open state to a &mut bool the caller owns. If omitted, the section remembers its state in egui’s temp storage.

pub fn default_open(self, open: bool) -> Self

Starting state when no prior state exists. Default: closed.

pub fn show<R>( self, ui: &mut Ui, add_body: impl FnOnce(&mut Ui) -> R, ) -> InnerResponse<Option<R>>

Render the trigger row, and the body when open. Returns an InnerResponse whose response is the trigger row (useful for checking clicked(), hovered(), etc.) and whose inner is the body closure’s return value, or None if the section is closed.

Trait Implementations

impl<'a> Debug for CollapsingSection<'a>

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

Formats the value using the given formatter.