zng_app::event

Struct CommandHandle

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pub struct CommandHandle { /* private fields */ }
Expand description

A handle to a Command subscription.

Holding the command handle indicates that the command is relevant in the current app state. The handle needs to be enabled to indicate that the command primary action can be executed.

You can use the Command::subscribe method in a command type to create a handle.

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impl CommandHandle

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pub fn command(&self) -> Option<Command>

The command.

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pub fn set_enabled(&self, enabled: bool)

Sets if the command event handler is active.

When at least one CommandHandle is enabled the command is is_enabled.

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pub fn is_enabled(&self) -> bool

Returns if this handle has enabled the command.

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pub fn dummy() -> Self

New handle not connected to any command.

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pub fn is_dummy(&self) -> bool

If the handle is not connected to any command.

Trait Implementations§

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impl Debug for CommandHandle

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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 Default for CommandHandle

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Drop for CommandHandle

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fn drop(&mut self)

Executes the destructor for this type. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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where T: ?Sized,

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fn borrow(&self) -> &T

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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize = _

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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn drop(ptr: usize)

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type Error = Infallible

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where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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impl<T> StateValue for T
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