Struct FrameSession 

pub struct FrameSession { /* private fields */ }

A window’s layout engine session.

Implementations

impl FrameSession

pub fn new(layout_engine: Box<dyn LayoutEngine>) -> FrameSession

Creates a session that drives layout_engine.

pub fn clear(&self)

Discards the layout tree and cached bounds, ready for a new frame.

pub fn request_layout( &self, style: &EngineLayoutStyle, rem_size: Pixels, scale_factor: f32, children: &[LayoutId], ) -> LayoutId

Adds a node built from style.

pub fn request_measured_layout( &self, style: &EngineLayoutStyle, rem_size: Pixels, scale_factor: f32, measure: Box<dyn FnMut(Size<Option<Pixels>>, Size<AvailableSpace>, &mut dyn MeasureContext) -> Size<Pixels>>, ) -> LayoutId

Adds a leaf whose size is resolved by measure during layout.

pub fn stretch_auto_size_to_fill( &self, id: LayoutId, size: Size<Pixels>, scale_factor: f32, )

Treats any auto dimension of id’s style as filling size.

pub fn compute_layout( &self, id: LayoutId, available_space: Size<AvailableSpace>, scale_factor: f32, context: &mut dyn MeasureContext, )

Computes the layout of id within available_space.

pub fn layout_bounds(&self, id: LayoutId, scale_factor: f32) -> Bounds<Pixels>

Returns the pixel-snapped bounds of id relative to the window.