Struct zng_app::handler::FilterWidgetHandler

pub struct FilterWidgetHandler<A, H, F> { /* private fields */ }

Widget handler wrapper that filters the events, only delegating to self when filter returns true.

Implementations

impl<A, H, F> FilterWidgetHandler<A, H, F>

where A: Clone + 'static, H: WidgetHandler<A>, F: FnMut(&A) -> bool + Send + 'static,

pub fn new(handler: H, filter: F) -> Self

New filter handler.

Trait Implementations

impl<A, H, F> WidgetHandler<A> for FilterWidgetHandler<A, H, F>

where A: Clone + 'static, H: WidgetHandler<A>, F: FnMut(&A) -> bool + Send + 'static,

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.