Enum ResourceHostRef 

pub enum ResourceHostRef {
    Element(Ref<StyledElement>),
    Other(Rc<dyn IResourceHost>),
}

A strong reference to a resource host: a styled element, or another host such as the application object.

Variants

Element(Ref<StyledElement>)

Other(Rc<dyn IResourceHost>)

Implementations

impl ResourceHostRef

pub fn downgrade(&self) -> WeakResourceHost

Creates a weak reference to the host.

pub fn as_element(&self) -> Option<&Ref<StyledElement>>

The host as a styled element, if it is one.

impl ResourceHostRef

pub fn resource_observable( &self, key: impl Into<ResourceKey>, converter: Option<ResourceConverter>, ) -> Rc<dyn IObservable<Option<BoxedValue>>>

Gets an observable for the resource with the specified key.

The observable produces the current value on subscription and a new value whenever the resources visible to the host, or its theme variant, change. It holds the host weakly; while it has observers the host keeps it alive.

Methods from Deref<Target = dyn IResourceHost>

pub fn find_resource(&self, key: &ResourceKey) -> ResourceValue

Finds the specified resource by searching up the logical tree and then global styles.

Returns the resource, or the unset value marker if not found.

pub fn find_resource_for_theme( &self, theme: Option<&ThemeVariant>, key: &ResourceKey, ) -> ResourceValue

Finds the specified resource for a theme variant by searching up the logical tree and then global styles.

Returns the resource, or the unset value marker if not found.

pub fn try_find_resource( &self, key: &ResourceKey, theme: Option<&ThemeVariant>, ) -> Option<ResourceValue>

Tries to find the specified resource by searching up the logical tree and then global styles.

Trait Implementations

impl Clone for ResourceHostRef

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Deref for ResourceHostRef

type Target = dyn IResourceHost

The resulting type after dereferencing.

fn deref(&self) -> &(dyn IResourceHost + 'static)

Dereferences the value.

impl<T: ObjectType + Upcast<StyledElement>> From<&Ref<T>> for ResourceHostRef

fn from(value: &Ref<T>) -> Self

Converts to this type from the input type.

impl<T: IResourceHost + 'static> From<Rc<T>> for ResourceHostRef

fn from(value: Rc<T>) -> Self

Converts to this type from the input type.

impl From<Rc<dyn IResourceHost>> for ResourceHostRef

fn from(value: Rc<dyn IResourceHost>) -> Self

Converts to this type from the input type.

impl<T: ObjectType + Upcast<StyledElement>> From<Ref<T>> for ResourceHostRef

fn from(value: Ref<T>) -> Self

Converts to this type from the input type.

impl PartialEq for ResourceHostRef

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

Equality operator ==.

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

Inequality operator !=.