Struct NullWindowRenderer 

pub struct NullWindowRenderer { /* private fields */ }

Implementations

impl NullWindowRenderer

pub fn new() -> Self

Trait Implementations

impl Clone for NullWindowRenderer

fn clone(&self) -> NullWindowRenderer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for NullWindowRenderer

impl Default for NullWindowRenderer

fn default() -> NullWindowRenderer

Returns the “default value” for a type.

impl RenderContext for NullWindowRenderer

fn try_register_custom_resource( &mut self, resource: Box<dyn Any>, ) -> Result<ResourceId, RegisterResourceError>

fn unregister_resource(&mut self, resource_id: ResourceId)

fn renderer_specific_context(&self) -> Option<Box<dyn Any>>

Return a type-erased context type that is passed to custom widgets in order to enable them to render renderer-specific content

impl WindowRenderer for NullWindowRenderer

type ScenePainter<'a> = NullScenePainter where Self: 'a

fn resume<F: FnOnce() + 'static>( &mut self, _window: Arc<dyn WindowHandle>, _width: u32, _height: u32, on_ready: F, )

Begin resuming the renderer. on_ready fires when initialization completes — synchronously inside resume on native, asynchronously (via wasm_bindgen_futures::spawn_local) on wasm32-unknown-unknown. After it fires, the embedder must call complete_resume to transition the renderer to the active state.

fn complete_resume(&mut self) -> bool

Finalize a previously-initiated resume. Returns true once the renderer is active and ready to render. Idempotent on already-active renderers; returns false if a pending init has not yet produced a result.

fn suspend(&mut self)

fn is_active(&self) -> bool

fn set_size(&mut self, _width: u32, _height: u32)

fn render<F: FnOnce(&mut Self::ScenePainter<'_>)>(&mut self, _draw_fn: F)

fn is_pending(&self) -> bool

Returns true while an asynchronous resume is in flight (after resume but before complete_resume has succeeded). Defaults to false for backends with synchronous initialization.