pub trait FocusChainExtwhere
Self: Sized,{
// Required methods
fn len(&self) -> usize;
fn duplicate(&self) -> Result<Self, Status>;
fn koids(
&self,
) -> Box<dyn ExactSizeIterator<Item = Result<Koid, Status>> + '_>;
fn to_focus_koid_chain(&self) -> Result<FocusKoidChain, Status>;
// Provided methods
fn is_empty(&self) -> bool { ... }
fn equivalent<O: FocusChainExt>(&self, other: &O) -> Result<bool, Status> { ... }
}Expand description
Extension trait for fidl_fuchsia_ui_focus::FocusChain and
fidl_fuchsia_ui_focus::FocusKoidChain.
Required Methods§
Sourcefn duplicate(&self) -> Result<Self, Status>
fn duplicate(&self) -> Result<Self, Status>
Creates a new chain, in which all of the ViewRefs (or koids) have been duplicated from the
original. Returns an error if duplicating any of the ViewRefs fails.
Sourcefn koids(&self) -> Box<dyn ExactSizeIterator<Item = Result<Koid, Status>> + '_>
fn koids(&self) -> Box<dyn ExactSizeIterator<Item = Result<Koid, Status>> + '_>
Returns a fallible iterator over the chain’s koids. If any koid cannot be retrieved, the iterator yields an error in its place.
Sourcefn to_focus_koid_chain(&self) -> Result<FocusKoidChain, Status>
fn to_focus_koid_chain(&self) -> Result<FocusKoidChain, Status>
Converts this chain into a FocusKoidChain, which contains just koids instead of
[ViewRef]s.
Provided Methods§
Sourcefn equivalent<O: FocusChainExt>(&self, other: &O) -> Result<bool, Status>
fn equivalent<O: FocusChainExt>(&self, other: &O) -> Result<bool, Status>
Returns true if the two chains’ ViewRefs correspond to the same koids, in the same
order. If any of the koids cannot be retrieved, returns an error.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.