Struct input_pipeline::focus_listener::FocusListener

pub struct FocusListener { /* private fields */ }

FocusListener listens to focus change and notify to related input modules.

Implementations

impl FocusListener

pub fn new( focus_chain_publisher: FocusChainProviderPublisher, metrics_logger: MetricsLogger ) -> Result<Self, Error>

Creates a new focus listener that holds proxy to text manager. The caller is expected to spawn a task to continually listen to focus change event.

Arguments

• focus_chain_publisher: Allows focus chain updates to be sent to downstream listeners. Note that this is not required for FocusListener to function, so it could be made an Option in future changes.

Example

let mut listener = FocusListener::new(focus_chain_publisher);
let task = fuchsia_async::Task::local(async move {
    listener.dispatch_focus_changes().await
});

FIDL

Required:

• fuchsia.ui.views.FocusChainListener
• fuchsia.ui.keyboard.focus.Controller

Errors

If unable to connect to the text_manager protocol.

pub async fn dispatch_focus_changes(&mut self) -> Result<(), Error>

Dispatches focus chain updates from focus_chain_listener to text_manager and any subscribers of focus_chain_publisher.