zng_app::event

Struct AppCommandArgs

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pub struct AppCommandArgs {
    pub args: CommandArgs,
    pub handle: Arc<CommandHandle>,
}
Expand description

Arguments for Command::on_event.

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§args: CommandArgs

The command args.

§handle: Arc<CommandHandle>

The command handle held by the event handler.

Methods from Deref<Target = CommandArgs>§

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pub fn param<T: Any>(&self) -> Option<&T>

Returns a reference to a parameter of T if parameter is set to a value of T.

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pub fn enabled_param<T: Any>(&self) -> Option<&T>

Returns param if is enabled.

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pub fn disabled_param<T: Any>(&self) -> Option<&T>

Returns param if is not enabled.

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pub fn handle_enabled<F, R>( &self, local_handle: &CommandHandle, handler: F, ) -> Option<R>
where F: FnOnce(&Self) -> R,

Call handler if propagation is not stopped and the command and local handler are enabled. Stops propagation after handler is called.

This is the default behavior of commands, when a command has a handler it is relevant in the context, and overwrites lower priority handlers, but if the handler is disabled the command primary action is not run.

Returns the handler result if it was called.

Trait Implementations§

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impl AnyEventArgs for AppCommandArgs

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fn clone_any(&self) -> Box<dyn AnyEventArgs>

Clone the event into a type erased box.
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fn as_any(&self) -> &dyn Any

Access to dyn Any methods.
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fn timestamp(&self) -> DInstant

Gets the instant this event happened.
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fn delivery_list(&self, list: &mut UpdateDeliveryList)

Insert all targets of this event on the UpdateDeliveryList.
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fn propagation(&self) -> &EventPropagationHandle

Propagation handle associated with this event instance. Read more
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impl Clone for AppCommandArgs

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fn clone(&self) -> AppCommandArgs

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for AppCommandArgs

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Deref for AppCommandArgs

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type Target = CommandArgs

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl EventArgs for AppCommandArgs

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fn handle<F, R>(&self, handler: F) -> Option<R>
where F: FnOnce(&Self) -> R,

Calls handler and stops propagation if propagation is still allowed. Read more

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impl<T> Any for T
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where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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const ALIGN: usize = _

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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