Struct Cached 

pub struct Cached { /* private fields */ }

Opts a subtree into the runtime layer cache.

The runtime replays the child’s painted output while the child’s element revision and absolute paint context are unchanged. Mutating a signal read during build/paint bumps the revision and forces a repaint. Backdrop, filter, and opacity spans are captured and rebased with the layer; embedded surfaces and paint-time callbacks still bypass the cache.

Paint-time side effects are not replayed. Do not wrap views that register shapes, sample the clock or pointer position, or rely on paint_self being called on every frame.

Implementations

impl Cached

pub fn new<V: View + 'static>(child: V) -> Self

Trait Implementations

impl Clone for Cached

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl View for Cached

fn body(&self) -> impl View + 'static

fn hit_testable(&self) -> bool

fn cache_layer(&self) -> bool

Allows the runtime to replay this element’s painted subtree from cache while its element revision and absolute paint context stay unchanged.

fn layout_style_ctx(&self, _rt: &Runtime, _el: ElementId) -> LayoutStyle

fn accessibility(&self) -> Option<Accessible>

fn arrange_override( &self, _rt: &Runtime, _el: ElementId, _rect: Rect, _ctx: &mut LayoutCtx<'_>, ) -> bool

fn clip_self(&self) -> bool

fn clip_radius(&self) -> f32

fn paint_opacity(&self) -> Option<f32>

fn paint_opacity_ctx(&self, _rt: &Runtime, _el: ElementId) -> Option<f32>

fn paint_offset(&self) -> Vec2

fn paint_offset_ctx(&self, _rt: &Runtime, _el: ElementId) -> Vec2

fn paint_scale(&self) -> f32

fn paint_scale_ctx(&self, _rt: &Runtime, _el: ElementId) -> f32

fn paint_rotation(&self) -> f32

fn paint_rotation_ctx(&self, _rt: &Runtime, _el: ElementId) -> f32

fn foreground_filter(&self) -> Option<Filter>

fn captures_pointer_ctx(&self, _rt: &Runtime, _el: ElementId) -> bool

fn reuse_state(&self, _old: &Self)

fn test_id(&self) -> Option<String>

fn focus_trap(&self) -> bool

fn accepts_tab(&self) -> bool

fn accepts_text_input(&self) -> bool

Whether this view edits text when focused.

fn paint_foreground(&self, _ctx: &mut PaintCtx<'_>)

fn accepts_drop(&self, _payload: &DragPayload) -> bool

fn on_drag_over(&self, _pos: DropPosition, _ctx: &mut EventCtx<'_>)

fn on_drop(&self, _pos: DropPosition, _ctx: &mut EventCtx<'_>)

fn on_drag_start(&self, _ctx: &mut EventCtx<'_>)

fn on_drag_end(&self, _end: DragEnd, _ctx: &mut EventCtx<'_>)