Struct ShieldWidget 

pub struct ShieldWidget { /* private fields */ }

The retained widget for a ShieldView. See shield.

Trait Implementations

impl SliverWidget for ShieldWidget

fn layout_sliver( &mut self, ctx: &mut LayoutCtx<'_>, sc: &SliverConstraints, ) -> SliverGeometry

Pass-through, like Widget::layout: the child sits at the origin and receives sc unchanged, under the child pod’s layout skip.

impl Widget for ShieldWidget

fn as_sliver(&mut self) -> Option<&mut dyn SliverWidget>

A shield is a sliver exactly when its child is: the transparent layout runs through the child pod, so the sliver face is the shield itself and the pod stays sized for this wrapper’s own paint (the ComponentWidget pattern).

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

Choose a size within bc and return it. The chosen size must satisfy bc (callers may additionally clamp via BoxConstraints::constrain).

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

Emit draw commands for this widget into scene.

fn event(&mut self, ctx: &mut EventCtx<'_>, event: &InputEvent) -> EventResult

Handle an input event, optionally mutating application state through ctx and reporting whether it was consumed.

fn semantics(&self, ctx: &mut SemanticsCtx)

Contribute this widget’s accessibility node(s) into ctx.

fn visit_children(&self, visitor: &mut dyn FnMut(&ChildPod))

Visit this widget’s owned ChildPods, in declaration (paint) order — the read-only seam that makes the retained hierarchy enumerable.

fn type_name(&self) -> &'static str

This widget’s concrete type name, for read-only tooling.