import { ScrollbarProps, ScrollState, DragState } from './types';
import { Ref, ShallowReactive, ShallowRef, ComputedRef } from 'vue';

export interface UseScrollbarOptions {
    props: ScrollbarProps;
    emit: {
        (event: 'scroll', scrollInfo: {
            scrollTop: number;
            scrollLeft: number;
        }): void;
        (event: 'end-reached', direction: 'vertical' | 'horizontal'): void;
    };
    wrapRef: Ref<HTMLElement | undefined>;
}
export declare const useScrollbar: (options: UseScrollbarOptions) => {
    scrollState: ShallowReactive<ScrollState>;
    dragState: ShallowRef<DragState | null, DragState | null>;
    vScrollbarData: ComputedRef<{
        visible: boolean;
        maxScrollTop: number;
        availableHeight: number;
        thumbHeight: number;
        thumbTop: number;
        barStyle: {
            top: string;
            height: string | undefined;
        };
        thumbStyle: {
            height: string;
            transform: string;
            display?: undefined;
        } | {
            display: string;
            height?: undefined;
            transform?: undefined;
        };
    } | undefined>;
    hScrollbarData: ComputedRef<{
        visible: boolean;
        maxScrollLeft: number;
        thumbWidth: number;
        thumbLeft: number;
        thumbStyle: {
            width: string;
            transform: string;
            display?: undefined;
        } | {
            display: string;
            width?: undefined;
            transform?: undefined;
        };
    } | undefined>;
    update: () => void;
    handleScroll: (event?: Event) => void;
    handleWheel: (e: WheelEvent) => void;
    scrollTo: (optionsOrX: ScrollToOptions | number, y?: number) => void;
    setScrollTop: (value: number) => number | undefined;
    setScrollLeft: (value: number) => number | undefined;
    startDrag: (event: MouseEvent) => void;
    clickTrackHandler: (event: MouseEvent) => void;
    savePosition: () => void;
    restorePosition: () => void;
    cleanup: () => void;
    getScrollWrap: () => HTMLElement | null;
    scrollBottom: () => void;
};