Crate oxiui_core 

oxiui-core — Pure-Rust UI core traits and types.

Zero external dependencies. Adapters (oxiui-egui, oxiui-render-wgpu, …) implement the traits defined here; the oxiui facade wires them together.

In addition to the immediate-mode trait surface (UiCtx, Widget, …) the crate provides foundational building blocks consumed across the stack:

• geometry — Point, Size, Rect, Insets, Constraints.
• events — MouseButton, Modifiers, Key, ScrollDelta.
• tree — a retained WidgetTree with stable ids and hit testing.
• layout — a single-line flexbox solver (FlexLayout).

Re-exports

pub use anim::Animator;

pub use anim::Easing;

pub use anim::Spring;

pub use anim::Transition;

pub use cache::LayoutCache;

pub use color_space::contrast_ratio;

pub use color_space::ContrastWarning;

pub use color_space::Hsla;

pub use color_space::LinearRgba;

pub use color_space::Oklcha;

pub use color_space::PaletteBuilder;

pub use color_space::WcagLevel;

pub use diff::diff;

pub use diff::DiffOp;

pub use dispatch::DispatchEvent;

pub use dispatch::EventDispatcher;

pub use dispatch::EventHandler;

pub use dispatch::HandlerCtx;

pub use dispatch::Phase;

pub use events::GestureKind;

pub use events::Key;

pub use events::KeyboardEvent;

pub use events::Modifiers;

pub use events::MouseButton;

pub use events::MouseEvent;

pub use events::PhysicalKey;

pub use events::Propagation;

pub use events::ScrollDelta;

pub use events::TouchEvent;

pub use focus::FocusManager;

pub use geometry::Constraints;

pub use geometry::Insets;

pub use geometry::Point;

pub use geometry::Rect;

pub use geometry::Size;

pub use grid::compute_grid;

pub use grid::GridItem;

pub use grid::GridLine;

pub use grid::GridPlacement;

pub use grid::GridSpan;

pub use grid::GridTemplate;

pub use grid::TrackSizing;

pub use layout::AlignContent;

pub use layout::AlignItems;

pub use layout::FlexDirection;

pub use layout::FlexItem;

pub use layout::FlexLayout;

pub use layout::FlexWrap;

pub use layout::JustifyContent;

pub use paint::DrawCommand;

pub use paint::DrawList;

pub use paint::RenderBackend;

pub use reactive::Computed;

pub use reactive::ReactiveError;

pub use reactive::ReactiveRuntime;

pub use reactive::Signal;

pub use response::CheckboxResponse;

pub use response::DropdownResponse;

pub use response::SliderResponse;

pub use response::TextInputResponse;

pub use response::WidgetResponse;

pub use scheduler::Debounce;

pub use scheduler::Scheduler;

pub use scheduler::Throttle;

pub use scheduler::TimerId;

pub use solver::Constraint;

pub use solver::Expression;

pub use solver::RelOp;

pub use solver::Solver;

pub use solver::SolverError;

pub use solver::Strength;

pub use solver::Term;

pub use solver::Variable;

pub use style::Border;

pub use style::BorderStyle;

pub use style::CursorShape;

pub use style::Margin;

pub use style::Padding;

pub use text_style::TextStyle;

pub use tree::WidgetId;

pub use tree::WidgetIdAllocator;

pub use tree::WidgetNode;

pub use tree::WidgetTree;

pub use widget_ext::ClipboardProvider;

pub use widget_ext::DragData;

pub use widget_ext::DragSource;

pub use widget_ext::DropEffect;

pub use widget_ext::DropTarget;

pub use widget_ext::WidgetExt;

Modules

anim

Easing curves, spring physics, and a transition animator.

cache

Layout memoization keyed by (WidgetId, input Size, content hash).

color_space

Colour-space conversions and palette construction/validation.

diff

Widget-tree diffing: turn an old tree into a new one with a minimal op set.

dispatch

Event dispatch with W3C-style capture and bubble phases.

events

Input event types: mouse buttons, keyboard keys, and modifier state.

focus

Keyboard focus management over a WidgetTree.

geometry

2-D geometry primitives used across the OxiUI stack.

grid

CSS Grid Level 1 layout engine.

layout

Flexbox layout engine — single-line and multi-line (wrapping).

paint

Draw-command buffer and render-backend abstraction for OxiUI.

reactive

Reactive primitives: Signal<T> and Computed<T> with automatic dependency tracking, topological dirty propagation, and cycle detection.

response

Response structs returned by the extended UiCtx widgets.

scheduler

Frame-aligned callback scheduling plus debounce/throttle helpers.

solver

Pure-Rust Cassowary linear constraint solver.

style

Spacing and decoration styling primitives.

text_style

Text rendering style for labels and headings.

tree

Retained widget-tree data structure with stable IDs and hit testing.

widget_ext

Widget combinators and the clipboard / drag-and-drop / cursor abstractions.

Structs

ButtonResponse

Response from a button widget.

Color

RGBA colour value, one u8 per channel: Color(r, g, b, a).

FontFeature

An OpenType feature tag toggle, e.g. "liga" on, "tnum" on.

FontSpec

Font specification for UI text.

Palette

A palette of semantic colours for a UI theme.

RichTextSpan

A styled text span for use with UiCtx::rich_text.

Enums

Axis

Layout axis.

FontStyle

The slant style of a font face.

UiError

Errors emitted by the OxiUI stack.

UiEvent

Events that the UI backend can emit.

Traits

EventSink

An event sink that accepts UI events for processing.

Layout

A layout strategy that controls how children are arranged.

Theme

A UI theme that provides a colour palette and font specification.

UiCtx

Rendering context passed to every Widget::render call.

Widget

A UI widget that can render itself into a UiCtx.