Struct glib::object::WeakRef

pub struct WeakRef<T: ObjectType>(_, _);

A weak reference to an object.

Implementations

impl<T: ObjectType> WeakRef<T>

pub fn new() -> WeakRef<T>

Create a new empty weak reference.

upgrade will always return None until an object is set on it.

pub fn set(&self, obj: Option<&T>)

Set this weak reference to the given object.

pub fn upgrade(&self) -> Option<T>

Try to upgrade this weak reference to a strong reference.

If the stored object was already destroyed or no object was set in this weak reference then None is returned.

Trait Implementations

impl<T: ObjectType> Clone for WeakRef<T>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug + ObjectType> Debug for WeakRef<T>

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

Formats the value using the given formatter.

impl<T: ObjectType> Default for WeakRef<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: ObjectType> Drop for WeakRef<T>

fn drop(&mut self)

Executes the destructor for this type.

impl<T: ObjectType> From<WeakRef<T>> for SendWeakRef<T>

fn from(v: WeakRef<T>) -> SendWeakRef<T>

Converts to this type from the input type.

impl<T: Downgrade + ObjectType> Upgrade for WeakRef<T>

type Strong = T

Strong reference type.

fn upgrade(&self) -> Option<Self::Strong>

Try upgrading a weak reference to a strong reference.

impl<T: ObjectType + Send + Sync> Send for WeakRef<T>

impl<T: ObjectType + Sync> Sync for WeakRef<T>