Struct druid::widget::IdentityWrapper

pub struct IdentityWrapper<W> { /* private fields */ }

A wrapper that adds an identity to an otherwise anonymous widget.

Implementations

impl<W> IdentityWrapper<W>

pub fn wrap(child: W, id: WidgetId) -> IdentityWrapper<W>

Assign an identity to a widget.

Trait Implementations

impl<T: Data, W: Widget<T>> Widget<T> for IdentityWrapper<W>

fn event( &mut self, ctx: &mut EventCtx<'_, '_>, event: &Event, data: &mut T, env: &Env )

Handle an event.

fn lifecycle( &mut self, ctx: &mut LifeCycleCtx<'_, '_>, event: &LifeCycle, data: &T, env: &Env )

Handle a life cycle notification.

fn update(&mut self, ctx: &mut UpdateCtx<'_, '_>, old_data: &T, data: &T, env: &Env)

Update the widget’s appearance in response to a change in the app’s Data or Env.

fn layout( &mut self, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &T, env: &Env ) -> Size

Compute layout.

fn paint(&mut self, ctx: &mut PaintCtx<'_, '_, '_>, data: &T, env: &Env)

Paint the widget appearance.

fn compute_max_intrinsic( &mut self, axis: Axis, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &T, env: &Env ) -> f64

Computes max intrinsic/preferred dimension of a widget on the provided axis.

impl<W> WidgetWrapper for IdentityWrapper<W>

type Wrapped = W

The type of the wrapped widget. Maybe we would like to constrain this to Widget<impl Data> (if existential bounds were supported). Any other scheme leads to T being unconstrained in unification at some point

fn wrapped(&self) -> &Self::Wrapped

Get immutable access to the wrapped child

fn wrapped_mut(&mut self) -> &mut Self::Wrapped

Get mutable access to the wrapped child