Struct WeakViewImageHandle

Source

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

Expand description

Connection to an image loading or loaded in the View Process.

The image is removed from the View Process cache when all clones of ViewImageHandle drops, but if there is another image pointer holding the image, this weak pointer can be upgraded back to a strong connection to the image.

Dummy handles never upgrade back.

Implementations§

Source §

impl WeakViewImageHandle

Source

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

Attempt to upgrade the weak pointer to the image to a full image.

Returns Some if the is at least another ViewImageHandle holding the image alive.

Trait Implementations§

Source §

impl Clone for WeakViewImageHandle

Source §

fn clone(&self) -> WeakViewImageHandle

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

Source §

impl Debug for WeakViewImageHandle

Source §

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

Formats the value using the given formatter. Read more

Source §

impl PartialEq for WeakViewImageHandle

Source §

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

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

1.0.0 · Source§

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

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

Auto Trait Implementations§

§

impl UnwindSafe for WeakViewImageHandle

Blanket Implementations§

Source §

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

Source §

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

Source §

impl<T> AnyVarValue for T
where T: Debug + PartialEq + Clone + Any + Send + Sync,

Source §

fn clone_boxed(&self) -> BoxAnyVarValue

Clone the value.

Source §

fn eq_any(&self, other: &(dyn AnyVarValue + 'static)) -> bool

Gets if self and other are equal.

Source §

fn try_swap(&mut self, other: &mut (dyn AnyVarValue + 'static)) -> bool

Swap value with other if both are of the same type.

Source §

impl<T> Borrow<T> for T
where T: ?Sized,

Source §

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

Source §

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source §

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

Source §

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

Source §

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

§

impl<T> Instrument for T

§

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

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Source §

impl<T, U> Into for T
where U: From<T>,

Source §

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source §

impl<T> IntoEither for T

Source §

fn into_either(self, into_left: bool) -> Either<Self, Self>

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

Source §

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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

Source §