Struct Adapter

pub struct Adapter { /* private fields */ }

Implementations

impl Adapter

pub fn with_direct_handlers( window: &dyn Window, activation_handler: impl 'static + ActivationHandler + Send, action_handler: impl 'static + ActionHandler + Send, deactivation_handler: impl 'static + DeactivationHandler + Send, ) -> Self

Creates a new AccessKit adapter for a winit window. This must be done before the window is shown for the first time. This means that you must use winit::window::WindowAttributes::with_visible to make the window initially invisible, then create the adapter, then show the window.

Use this if you want to provide your own AccessKit handler callbacks rather than dispatching requests through the winit event loop. This is especially useful for the activation handler, because depending on your application’s architecture, implementing the handler directly may allow you to return an initial tree synchronously, rather than requiring some platform adapters to use a placeholder tree until you send the first update. However, remember that each of these handlers may be called on any thread, depending on the underlying platform adapter.

pub fn process_event(&mut self, window: &dyn Window, event: &WinitWindowEvent)

Allows reacting to window events.

This must be called whenever a new window event is received and before it is handled by the application.

pub fn update_if_active(&mut self, updater: impl FnOnce() -> TreeUpdate)

If and only if the tree has been initialized, call the provided function and apply the resulting update. Note: If the caller’s implementation of ActivationHandler::request_initial_tree initially returned None, or if the caller created the adapter using EventLoopProxy, then the TreeUpdate returned by the provided function must contain a full tree.