Struct CallbackHandle

pub struct CallbackHandle(/* private fields */);

A handle to a callback installed on a Dynamic. When dropped, the callback will be uninstalled.

To prevent the callback from ever being uninstalled, use Self::persist().

Implementations

impl CallbackHandle

pub fn persist(self)

Persists the callback so that it will always be invoked until the dynamic is freed.

pub fn forget_owners(&mut self)

Drops any references to owning Dynamics associated with this callback.

This enables creating weak connections between callback graphs.

pub fn weak(self) -> Self

Drops any references to owning Dynamics associated with this callback, and returns self.

This uses Self::forget_owners().

Trait Implementations

impl Add for CallbackHandle

type Output = CallbackHandle

The resulting type after applying the + operator.

fn add(self, rhs: Self) -> Self::Output

Performs the + operation.

impl AddAssign for CallbackHandle

fn add_assign(&mut self, rhs: Self)

Performs the += operation.

impl Debug for CallbackHandle

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

Formats the value using the given formatter.

impl Default for CallbackHandle

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for CallbackHandle

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for CallbackHandle