Struct zng_app::widget::builder::ArcWidgetHandler

pub struct ArcWidgetHandler<A: Clone + 'static>(/* private fields */);

Represents a WidgetHandler<A> that can be reused.

Note that hn_once! will still only be used once, and async_hn! tasks are bound to the specific widget context that spawned them. This struct is cloneable to support handler properties in styleable widgets, but the general expectation is that the handler will be used on one property instance at a time.

Implementations

impl<A: Clone + 'static> ArcWidgetHandler<A>

pub fn new(handler: impl WidgetHandler<A>) -> Self

New from handler.

Trait Implementations

impl<A: Clone + 'static> AnyArcWidgetHandler for ArcWidgetHandler<A>

fn clone_boxed(&self) -> Box<dyn AnyArcWidgetHandler>

Clone the handler reference.

fn as_any(&self) -> &dyn Any

Access to dyn Any methods.

fn into_any(self: Box<Self>) -> Box<dyn Any>

Access to Box<dyn Any> methods.

impl<A: Clone + Clone + 'static> Clone for ArcWidgetHandler<A>

fn clone(&self) -> ArcWidgetHandler<A>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<A: Clone + 'static> WidgetHandler<A> for ArcWidgetHandler<A>

fn event(&mut self, args: &A) -> bool

Called every time the handler’s event happens in the widget context.

fn update(&mut self) -> bool

Called every widget update.

fn boxed(self) -> Box<dyn WidgetHandler<A>>

where Self: Sized,

Box the handler.

fn cfg_boxed(self) -> Box<dyn WidgetHandler<A>>

where Self: Sized,

Boxes the handler if the feature = "dyn_closure" is active, otherwise retains the same handler type.