import { OnDestroy, OnInit } from '@angular/core';
import { SortDirective } from './sort.directive';
import { CdkColumnDef } from '@angular/cdk/table';
import { SortDirection } from './tables.types';
export declare class SortHeaderDirective implements OnInit, OnDestroy {
    sortDir: SortDirective;
    columnDef: CdkColumnDef;
    styleCursor: string;
    tabIndex: string;
    get classAsc(): boolean;
    get classDesc(): boolean;
    get ariaSort(): "ascending" | "descending";
    direction: SortDirection;
    private readonly directions;
    constructor(sortDir: SortDirective, columnDef: CdkColumnDef);
    click(): void;
    keyEvent(event: KeyboardEvent): void;
    sort(): void;
    ngOnDestroy(): void;
    ngOnInit(): void;
    reset(): void;
}