Struct RectReader 

pub struct RectReader { /* private fields */ }

Fires atom.set(Some(ctx.rect)) after paint, surfacing the widget’s window-pixel coordinates to user code without any widget modification.

let anchor: Atom<Option<Rect>> = ctx.state(None);
RectReader::new(anchor.clone(), Button::new("Open"))
// After first paint: anchor.get() == Some(Rect { ... })

Implementations

impl RectReader

pub fn new(atom: Atom<Option<Rect>>, child: impl Widget + 'static) -> Self

Trait Implementations

impl Widget for RectReader

fn children(&self) -> Children<'_>

Declare this widget’s children. Drives every default below.

fn paint(&self, ctx: &mut PaintCtx<'_>)

Record draw commands for ctx.rect.

fn layout(&self, ctx: &LayoutCtx<'_>) -> Size

Measure under ctx.constraints and return a size within them.

fn flex_factor(&self) -> f32

Flex weight inside Row/Column. Wrappers are transparent by default.

fn into_element(self) -> Element

where Self: Sized + 'static,

Wrap this widget in an Element so it can be returned from Component::build().