import { Group, type DisplayObject, type ICanvas } from '@antv/g';
import type { ScrollBarTheme } from '../../common/interface/theme';
import type { PointObject, ScrollBarCfg } from './interface';
export declare enum ScrollType {
    ScrollChange = "scroll-change",
    ScrollEnd = "scroll-end"
}
export interface EventListenerReturn {
    remove: () => void;
}
export type EventHandler = {
    target: ICanvas;
    type: keyof HTMLElementEventMap;
    handler: (e: any) => void;
};
export declare class ScrollBar extends Group {
    isHorizontal: boolean;
    trackLen: number;
    thumbLen: number;
    position: PointObject;
    thumbOffset: number;
    scrollTargetMaxOffset: number;
    theme: ScrollBarTheme;
    scrollBarGroup: Group;
    trackShape: DisplayObject;
    thumbShape: DisplayObject;
    private startPos;
    private clearEvents;
    private eventHandlers;
    private scrollFrameId;
    constructor(scrollBarCfg: ScrollBarCfg);
    private getCoordinatesName;
    /**
     * Antv/g 5.0 环境下坐标修正
     *
     * 当 lineCap 设置为非 'butt' 后，实际绘制左右两端会多两个头，且不计入 getBBox 的计算
     * 如长100，strokeWidth=10，实际渲染110长度的线，getBBox 仍返回100
     */
    private getCoordinatesWithBBoxExtraPadding;
    /**
     * 当前滑块滑动的位置 0 ~ 1
     */
    current: () => number;
    /**
     * 更新滑块长度
     * @param newThumbLen 新的滑道长度
     */
    updateThumbLen: (newThumbLen: number) => void;
    /**
     * 更新滑块的 offset 值
     * @param offset
     */
    updateThumbOffset: (offset: number, emitScrollChange?: boolean) => void;
    /**
     * 只更新位置属性，而不emit滚动事件
     * @param offset
     */
    onlyUpdateThumbOffset: (offset: number) => void;
    emitScrollChange: (offset: number, updateThumbOffset?: boolean) => void;
    protected bindEventListener: (target: EventTarget, eventType: keyof HTMLElementEventMap, callback: EventListenerOrEventListenerObject) => EventListenerReturn;
    protected addEvent: (target: EventHandler['target'], type: EventHandler['type'], handler: EventHandler['handler']) => void;
    private initScrollBar;
    private createScrollBarGroup;
    private createTrackShape;
    private createThumbShape;
    private bindEvents;
    private onStartEvent;
    private bindLaterEvent;
    private onTrackClick;
    private onPointerMove;
    private onPointerUp;
    private onTrackPointerOver;
    private onTrackPointerOut;
    private validateRange;
}