Struct AnyWindowHandle 

pub struct AnyWindowHandle { /* private fields */ }

A handle to an open window whose root view type isn’t known at compile time.

Use it to store handles in collections or to find the window with a given id. Convert it to a WindowHandle with AnyWindowHandle::downcast when you know the root type.

Implementations

impl AnyWindowHandle

pub fn build_entity<V: Render + 'static>( &self, cx: &mut TestAppContext, build_view: impl FnOnce(&mut Window, &mut Context<'_, V>) -> V, ) -> Entity<V>

Creates an entity with build_view in this window.

Panics

Panics if the window has been closed.

impl AnyWindowHandle

pub fn window_id(&self) -> WindowId

Returns the WindowId of this window.

pub fn root_entity_type_name(&self) -> &'static str

Returns the root type name recorded when this handle was created.

This uses std::any::type_name. Replacing the window’s root does not change the name stored in an existing handle.

pub fn downcast<T: 'static>(&self) -> Option<WindowHandle<T>>

Converts this handle to WindowHandle<T> if its recorded root type is T.

This compares the stored type tag without querying the window. After Window::replace_root, a successful downcast can still yield a handle whose reads and updates fail. Use AnyWindowHandle::update to inspect the live root instead.

pub fn update<C, R>( self, cx: &mut C, update: impl FnOnce(AnyView, &mut Window, &mut App) -> R, ) -> Result<R>

where C: AppContext,

Updates the state of the root view of this window.

This will fail if the window has been closed.

pub fn read<T, C, R>( self, cx: &C, read: impl FnOnce(Entity<T>, &App) -> R, ) -> Result<R>

where C: AppContext, T: 'static,

Read the state of the root view of this window.

This will fail if the window has been closed.

Trait Implementations

impl Clone for AnyWindowHandle

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AnyWindowHandle

impl Debug for AnyWindowHandle

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

Formats the value using the given formatter.

impl Eq for AnyWindowHandle

impl<V: 'static> From<WindowHandle<V>> for AnyWindowHandle

fn from(val: WindowHandle<V>) -> Self

Converts to this type from the input type.

impl Hash for AnyWindowHandle

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for AnyWindowHandle

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AnyWindowHandle