/**
 * Drawing canvas — aligned with Python `schemdraw.Drawing` (SVG subset).
 */
import { ImageFormat, type BBox, type ImageType } from "./types.js";
import { type SchemdrawStyle } from "./config.js";
import { Point, type XY } from "./geometry/point.js";
import { Container } from "./container.js";
import { Element } from "./element.js";
import type { SegmentLike } from "./segment.js";
/** Metadata attached to an element for interactive / introspection use. */
export interface ElementMeta {
    id: string;
    type: string;
    tooltip?: string;
}
/**
 * 电路画布。构造返回的实例经 `Proxy` 支持 Python 式锚点：`drawing.foo` 在已 `setAnchor('foo')` 且不与成员名冲突时得到 {@link Point}。
 * TypeScript 若报「无此属性」，可用 {@link Drawing.getAnchor} 或 `anchors['foo']`。
 */
export declare class Drawing {
    readonly elements: Element[];
    /** Named positions in drawing coordinates (`set_anchor` / Python `Drawing.anchors`). */
    anchors: Record<string, [number, number]>;
    /** Extra SVG `<defs>` fragments (Python `Drawing.svgdefs`). */
    readonly svgdefs: string[];
    dwgparams: Record<string, unknown>;
    _here: Point;
    _theta: number;
    private readonly _state;
    outfile?: string;
    private readonly _elementMeta;
    setElementMeta(el: Element, meta: ElementMeta): void;
    getElementMeta(el: Element): ElementMeta | undefined;
    /**
     * Current placement position (Python `Drawing.here` / `_here`).
     * Get/set both call `push_element(None)` like Python — flushes any pending implicit `add`.
     */
    get here(): Point;
    set here(v: Point | XY);
    /** Current drawing direction in degrees (Python `Drawing.theta`). Getter flushes implicit stack. */
    get theta(): number;
    set theta(v: number);
    /** Two-terminal default length (Python `Drawing.unit`). */
    get unit(): number;
    set unit(v: number);
    constructor(opts?: Partial<SchemdrawStyle> & {
        file?: string;
    });
    /**
     * Typed read of a named anchor (same coordinates as Python `drawing.name` after `set_anchor`).
     * Dot access `drawing.name` also works on instances returned by `new Drawing()` / `withDrawing`.
     */
    getAnchor(name: string): Point | undefined;
    enter(): void;
    exit(): void;
    containsElement(el: Element): boolean;
    add(el: Element): Element;
    /** Remove last element; restore `here` / `theta` from last remaining (Python `Drawing.undo`). */
    undo(): void;
    /** Merge drawing defaults (Python `Drawing.config`). */
    config(partial: Partial<SchemdrawStyle>): void;
    /** Append multiple elements (Python `Drawing.add_elements`). */
    addElements(...els: Element[]): void;
    /**
     * Grouping box for implicit `add` stack (Python `Drawing.container()` / `with drawing.container():`).
     * Call {@link Container.enter} before child elements and {@link Container.exit} after, then {@link add} the container.
     */
    container(opts?: {
        cornerradius?: number;
        padx?: number;
        pady?: number;
    }): Container;
    /** Offset the current placement position (Python `Drawing.move`). */
    move(dx?: number, dy?: number): void;
    /** Set placement position relative to `ref` (Python `Drawing.move_from`). */
    moveFrom(ref: Point, dx?: number, dy?: number, theta?: number): void;
    /** Save `here` / `theta` on a stack (Python `Drawing.push`). */
    push(): void;
    /** Restore last pushed `here` / `theta` (Python `Drawing.pop`). */
    pop(): void;
    /**
     * Save / restore `here` and `theta` around a callback — same stack as `push`/`pop`
     * (Python `with drawing.hold():`).
     */
    withHold<T>(fn: () => T): T;
    /**
     * Manual alternative to `withHold`: call `hold()` then `close()` when done
     * (Python `HoldState` context manager).
     */
    hold(): {
        close: () => void;
    };
    /** Append raw XML inside `<defs>` (Python `Drawing.add_svgdef`). */
    addSvgDef(svgdef: string): void;
    /** Record a named anchor at the current position (Python `Drawing.set_anchor`). */
    setAnchor(name: string): void;
    /**
     * Flattened transformed segments — `params` = user ∪ elm ∪ defaults (**no** drawing `_dwgparams`),
     * aligned with Python `Drawing.get_segments`.
     */
    getSegments(): SegmentLike[];
    /**
     * Write SVG to a file (Node only). Extension should be `.svg`.
     * In browser environments this method throws — use {@link toSvgString} instead.
     */
    save(path: string): Promise<void>;
    getBBox(): BBox;
    /** Render to SVG string (user units, SVG backend). */
    toSvgString(): string;
    /**
     * Python `Drawing.get_imagedata` — 当前构建仅支持 SVG（UTF-8 字节）；PNG 等栅格格式未接入。
     */
    getImageData(fmt?: ImageFormat | ImageType | string): Uint8Array;
}
/** Run `fn` with drawing stack (implicit `add` for elements created inside). */
export declare function withDrawing(fn: (d: Drawing) => void, opts?: Partial<SchemdrawStyle>): Drawing;