import { NgClass } from '@angular/common';
import { AfterViewInit, ElementRef, OnChanges, QueryList, SimpleChanges } from '@angular/core';
import { DokuTimelineDateTime } from './timeline-date-time.component';
import * as i0 from "@angular/core";
export declare class DokuTimeline implements AfterViewInit, OnChanges {
    dateTimeRef?: ElementRef<DokuTimelineDateTime>;
    timelineItems?: QueryList<ElementRef>;
    /**
     * The index of the last active timeline item.
     */
    activeIndex?: number;
    /**
     * The orientation of the timeline.
     * @default `horizontal`
     */
    orientation: 'horizontal' | 'vertical';
    protected get classes(): NgClass['ngClass'];
    protected get hasDateTime(): boolean;
    ngAfterViewInit(): void;
    ngOnChanges({ activeIndex }: SimpleChanges): void;
    /**
     * Toggle each timeline item color to active from the first to the last active item
     * that represented by the active index that represent.
     */
    private _toggleActiveItemColor;
    static ɵfac: i0.ɵɵFactoryDeclaration<DokuTimeline, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<DokuTimeline, "doku-timeline", ["dokuTimeline"], { "activeIndex": "activeIndex"; "orientation": "orientation"; }, {}, ["dateTimeRef", "timelineItems"], ["*"], true>;
}