Trait HandlerExt 

pub trait HandlerExt<A: Clone + 'static> {
    // Required methods
    fn widget_event(&mut self, args: &A) -> Option<UiTask<()>>;
    fn app_event(
        &mut self,
        handle: Box<dyn AppWeakHandle>,
        is_preview: bool,
        args: &A,
    );
    fn filtered(
        self,
        filter: impl FnMut(&A) -> bool + Send + 'static,
    ) -> Handler<A>;
    fn into_once(self) -> Handler<A>;
    fn into_arc(self) -> ArcHandler<A>;
    fn into_wgt_runner(self) -> WidgetRunner<A>;
}

Extension methods for Handler<A>.

Required Methods

fn widget_event(&mut self, args: &A) -> Option<UiTask<()>>

Notify the handler in a widget context.

If the handler is async polls once immediately and returns an UiTask if the future is pending. The caller must update the task until completion in the same widget context.

fn app_event( &mut self, handle: Box<dyn AppWeakHandle>, is_preview: bool, args: &A, )

Notify the handler outside of any widget or window context, inside a APP_HANDLER context.

If the handler is async polls once and continue execution in UPDATES.

fn filtered(self, filter: impl FnMut(&A) -> bool + Send + 'static) -> Handler<A>

New handler that only calls for arguments approved by filter.

fn into_once(self) -> Handler<A>

New handler that calls this one only once.

fn into_arc(self) -> ArcHandler<A>

Into cloneable handler.

Note that hn_once! and async_hn_once! handlers will still only run once.

fn into_wgt_runner(self) -> WidgetRunner<A>

Wrap the handler into a type that implements the async task management in an widget context.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<A: Clone + 'static> HandlerExt<A> for Handler<A>