import type { Size, RulerStyle } from "./types";
export default class Ruler {
    protected rulerId: string;
    canvasX: HTMLCanvasElement;
    ctxX: CanvasRenderingContext2D;
    canvasY: HTMLCanvasElement;
    ctxY: CanvasRenderingContext2D;
    protected sizeX: Size;
    protected sizeY: Size;
    protected scale: number;
    protected devicePixelRatio: number;
    protected ratioX: number;
    protected ratioY: number;
    protected style: RulerStyle;
    scrollLeft: number;
    scrollTop: number;
    constructor(style: RulerStyle);
    getCanvas(): void;
    drawCanvas(): void;
    /**
     * 更新
     * @param style
     */
    update(style: RulerStyle): void;
    /**
     * 调整大小
     * @param style
     */
    resize(style: RulerStyle): void;
    /**
     * 缩放
     * @param style
     */
    zoom(style: RulerStyle): void;
    /**
     * 清空画布
     */
    destroy(): void;
    draw(ctx: CanvasRenderingContext2D, type: "X" | "Y", scrollNum?: number): void;
    /**
     * 清空画布
     */
    clearCanvas(): void;
}