Struct CanvasWidget 

pub struct CanvasWidget { /* private fields */ }

The retained widget for a CanvasView. See the module docs.

Trait Implementations

impl Widget for CanvasWidget

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 type_name(&self) -> &'static str

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

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.