Struct ScrollMotion 

pub struct ScrollMotion<E> { /* private fields */ }

Binds native scroll progress to partial numeric targets. Defaults to instant mapping; choose a spring for smoothing. Layout extent changes trigger a follow-up frame, so the previous measurement cannot remain stale after resize. Preserve its CE-scoped ID and configure styles before wrapping.

Implementations

impl<E> ScrollMotion<E>

pub fn new( id: impl Into<ElementId>, handle: ScrollHandle, axis: Axis, from: Target, to: Target, child: E, ) -> Self

Creates a measured scroll binding.

pub fn transition(self, transition: Transition) -> Self

Selects optional smoothing.

Trait Implementations

impl<E: IntoElement + Styled + 'static> Element for ScrollMotion<E>

type RequestLayoutState = AnyElement

The type of state returned from Element::request_layout. A mutable reference to this state is subsequently provided to Element::prepaint and Element::paint.

type PrepaintState = ()

The type of state returned from Element::prepaint. A mutable reference to this state is subsequently provided to Element::paint.

fn id(&self) -> Option<ElementId>

If this element has a unique identifier, return it here. This is used to track elements across frames, and will cause a GlobalElementId to be passed to the request_layout, prepaint, and paint methods.

fn source_location(&self) -> Option<&'static Location<'static>>

Source location where this element was constructed, used to disambiguate elements in the inspector and navigate to their source code.

fn request_layout( &mut self, id: Option<&GlobalElementId>, _: Option<&InspectorElementId>, w: &mut Window, cx: &mut App, ) -> (LayoutId, AnyElement)

Before an element can be painted, we need to know where it’s going to be and how big it is. Use this method to request a layout from Taffy and initialize the element’s state.

fn prepaint( &mut self, id: Option<&GlobalElementId>, _: Option<&InspectorElementId>, _: Bounds<Pixels>, child: &mut AnyElement, w: &mut Window, cx: &mut App, )

After laying out an element, we need to commit its bounds to the current frame for hitbox purposes. The state argument is the same state that was returned from Element::request_layout().

fn paint( &mut self, _: Option<&GlobalElementId>, _: Option<&InspectorElementId>, _: Bounds<Pixels>, child: &mut AnyElement, _: &mut (), w: &mut Window, cx: &mut App, )

Once layout has been completed, this method will be called to paint the element to the screen. The state argument is the same state that was returned from Element::request_layout().

fn a11y_role(&self) -> Option<Role>

Returns the accessible role for this element, if any. Elements that return None are not included in the accessibility tree.

fn write_a11y_info(&self, _node: &mut Node)

Write accessibility properties to the given node. Called only when a11y_role() returns Some.

fn a11y_synthetic_children( &mut self, _prepaint: &mut Self::PrepaintState, _builder: &mut A11ySubtreeBuilder<'_>, )

Add synthetic child nodes to an Element that has an .id() and a .role().

fn into_any(self) -> AnyElement

Convert this element into a dynamically-typed AnyElement.

impl<E: IntoElement + Styled + 'static> IntoElement for ScrollMotion<E>

type Element = ScrollMotion<E>

The specific type of element into which the implementing type is converted. Useful for converting other types into elements automatically, like Strings

fn into_element(self) -> Self

Convert self into a type that implements Element.

fn into_any_element(self) -> AnyElement

Convert self into a dynamically-typed AnyElement.