import { fabric } from 'fabric';
interface InitOptions {
    canvas: HTMLCanvasElement;
    background_color: string;
    brush_color: string;
    brush_width: number;
    mode: DrawMode;
    back_event: (history: string[]) => void;
    zoom_change: (zoom: number) => void;
    drag_event: (status: boolean) => void;
}
interface MousePosInfo {
    x: number;
    y: number;
}
export declare enum DrawMode {
    SELECT = "select",
    LINE = "line",
    PEN = "pen",
    RECT = "rect",
    CIRCLE = "circle",
    TEXT = "text",
    CUSTOM = "custom"
}
interface SetTextOtions {
    left: number;
    top: number;
    width: number;
    text: string[];
    edit: boolean;
    color: string;
    font_size: number;
    angle: number;
}
interface SetImgOptions {
    src: string;
    angle: number;
    catch: (src: string) => void;
    finish: (src: string) => void;
}
interface DrawPathOptions {
    path: string;
    stroke: string;
    fill: string;
    stroke_width: number;
}
interface CustomDrawFunc {
    name: string;
    type: 'path' | 'text';
    get_draw_path_options?: (from: MousePosInfo, to: MousePosInfo, width: number, zoom: number) => Partial<DrawPathOptions>;
    get_draw_text_options?: (size: number, zoom: number) => Partial<SetTextOtions>;
    event: 'move' | 'up';
    enable: boolean;
}
export default class {
    /** 用于控制绘画频率 */
    private draw_rate;
    /** 窗口中页面的当前显示大小(缩放系数) */
    private window_zoom;
    /** canvas zoom */
    private canvas_zoom;
    private canvas_min_zoom;
    private canvas_max_zoom;
    /** canvas element */
    canvas: HTMLCanvasElement;
    /** fabric.Canvas 画板对象 */
    fCanvas: fabric.Canvas;
    /** 当前是否正在绘制中 */
    private in_drawing;
    /** 当前是否正在拖拽中 */
    private in_dragging;
    /** 移动图像的坐标 */
    private drag_last_posx;
    private drag_last_posy;
    /** 存储鼠标 xy pos 信息 */
    private from_mouse_info;
    private to_mouse_info;
    /** 绘制模式 */
    private draw_mode;
    /** 笔刷样式 */
    private brush_color;
    private brush_width;
    private font_size;
    /** 当前正在绘制的 obj */
    private current_draw_obj;
    /** 当前正在输入文本 */
    private current_text_obj;
    /** 历史记录 */
    private history;
    /** 事件 */
    private back_event;
    private zoom_change;
    private drag_event;
    /** 自定义绘制 */
    private custom_draw_store;
    /** 获取适配后的鼠标 from/to pos */
    private get_fix_mouse_info;
    constructor(options: Partial<InitOptions>);
    /**
     * 清空画板
     * state: 是否会清空历史记录
     */
    clear(state?: boolean): void;
    /**
     * destroy
     */
    destroyed(): void;
    /**
     * 初始化事件
     */
    private init_event;
    /**
     * 初始化画板样式
     */
    private init_style;
    /**
     * 设置笔刷属性
     */
    set_brush({ color, width, }: {
        color?: string;
        width?: number;
    }): void;
    set_min_zoom(zoom: number): void;
    set_max_zoom(zoom: number): void;
    set_font_size(size: number): void;
    /**
     * 设置绘制模式
     */
    set_mode(mode: DrawMode): void;
    /**
     * 可选择模块
     */
    enable_select(): void;
    /**
     * 删除选中的元素
     */
    delete_selected(): void;
    /**
     * 撤销
     */
    back(): void;
    /** img to base64 */
    to_img(zoom?: number): string;
    /** 设置文本 */
    set_text(options: Partial<SetTextOtions>, state?: boolean): void;
    /** 设置背景图片 */
    set_bg_img({ src, angle, catch: catchfn, finish: finishfn, }: Partial<SetImgOptions>, state?: boolean): void;
    /**
     * 获取鼠标的坐标信息
     */
    private save_mouse_info;
    /**
     * 存储当前状态
     */
    private save_state;
    /** 绘制方法 - mouse move */
    private draw_in_move;
    /** 绘制方法 - mouse up */
    private draw_in_up;
    /** 绘制-矩形 */
    private draw_rect;
    /** 绘制-直线 */
    private draw_line;
    /** 绘制-画笔 */
    private draw_pen;
    /** 绘制-圆 */
    private draw_circle;
    /** 绘制-文本 */
    private draw_text;
    /** 绘制自定义图形 */
    private draw_path;
    /** 获取可调用的自定义绘制函数 */
    private call_custom_draw_funcs;
    /** 注册自定义绘制函数 */
    register_custom_draw_func({ name, type, get_draw_path_options, get_draw_text_options, event, enable, }: Partial<CustomDrawFunc>): void;
    /** 切换自定义绘制函数 */
    set_custom_draw_func_enable(names: string[]): void;
    /** 设置缩放比例 */
    set_zoom(z: number, dont_trigger_change_event?: boolean, set_origin?: boolean): void;
    /** 判断鼠标是在在图片范围内 */
    private check_mouse_is_in_draw_area;
}
export {};