Struct CotisLayoutManager 

pub struct CotisLayoutManager { /* private fields */ }

Owns the layout tree, viewport size, text measurer, and post-frame element cache.

Implement LayoutManager via crate::cotis_traits and wire into CotisApp with a pipe (e.g. CotisLayoutToRenderListPipeForGenerics from cotis-pipes).

The renderer initializes text measurement and viewport dimensions through LayoutManagerCompatible.

Implementations

impl CotisLayoutManager

pub fn set_text_dim_fun( &mut self, fun: Box<dyn Fn(&str, &DefaultTextConfig) -> Dimensions>, )

Installs a function that measures text for layout.

Normally set automatically by LayoutManagerCompatible::init from the renderer’s RendererTextMeasuringProvider. Override only for custom measurement or testing.

impl CotisLayoutManager

pub fn new(screen_dimensions: Dimensions) -> Self

Creates a layout manager whose root element fills screen_dimensions.

pub fn set_dimensions(&mut self, screen_dimensions: Dimensions)

Updates the viewport size used for the root element.

Also called from LayoutManagerCompatible::prepare each frame.

pub fn get_cache_element(&self, id: ElementId) -> Option<&LayoutElement>

Returns an element from the last completed frame layout cache.

Populated when CotisLayoutRun::finalize_layouts finishes. The returned LayoutElement is an internal engine type — not a stable public path API; visibility is under review. Use crate::cotis_traits::secondary_traits and cotis_utils::element_state traits for structured inspection.

Trait Implementations

impl ElementBoundingBox for CotisLayoutManager

fn bounding_box(&self, id: ElementId) -> Option<BoundingBox>

Returns the bounding box of id.

impl ElementClipInternalSize for CotisLayoutManager

fn clip_internal_size(&self, id: ElementId) -> Option<Vector2>

Returns clip internal size for id.

impl ElementClipOffset for CotisLayoutManager

fn clip_offset(&self, id: ElementId) -> Option<Vector2>

Returns clipping child offset for id.

impl ElementDebugName for CotisLayoutManager

fn debug_name(&self, id: ElementId) -> Option<&str>

Returns the debug name for id, if available.

impl ElementsList for CotisLayoutManager

fn get_element_ids(&self) -> Vec<ElementId>

Returns all known element IDs.

fn get_parent_id(&self, id: ElementId) -> Option<ElementId>

Returns the parent ID for id, if any.

impl<'frame, T> LayoutManager<'frame, T, RenderCommandOutput<T>> for CotisLayoutManager

where T: CotisLayoutCompatible<'frame> + 'frame,

type ElementConfigurer<'layout> = CotisLayoutRun<'layout, T> where Self: 'layout

The configurator type used while constructing one frame.

fn begin_frame<'layout>( &'layout mut self, ) -> impl LayoutFrameManager<'frame, T, RenderCommandOutput<T>, Self::ElementConfigurer<'layout>>

where T: 'frame, RenderCommandOutput<T>: 'frame, Self: 'layout,

Starts a new frame and returns a frame manager used to build UI.

impl<Renderer: CotisWindowContext + RendererTextMeasuringProvider<TextConfig>> LayoutManagerCompatible<Renderer> for CotisLayoutManager

fn init(&mut self, renderer: &mut Renderer)

Initializes layout manager state against a renderer.

fn prepare(&mut self, render: &Renderer)

Prepares the layout manager before starting a new frame.

impl LayoutTextMeasuring<TextConfig> for CotisLayoutManager

fn set_text_measuring_function( &mut self, text: Box<TextMeasurer<'_, DefaultTextConfig>>, )

Registers the text measuring function used by the layout implementation.