import { OnDestroy } from '@angular/core';
import { ActionDirection } from '../dashboard.service';
import { DashboardWidgetComponent } from '../widget/dashboard-widget.component';
import { DashboardGrabHandleDirective } from './grab-handle.directive';
import * as i0 from "@angular/core";
export declare class DashboardGrabHandleService implements OnDestroy {
    private readonly _dashboard;
    /** Self-registered drag handles in the dashboard. */
    private _handles;
    /** Automatically unsubscribe from all observables when destroyed */
    private readonly _onDestroy;
    constructor();
    /** Perform unsubscriptions */
    ngOnDestroy(): void;
    /** Register a new grab handle. */
    addHandle(handle: DashboardGrabHandleDirective): void;
    /** Unregister a removed grab handle. */
    removeHandle(handle: DashboardGrabHandleDirective): void;
    /** Make the first visual item in the list focusable */
    setFirstItemFocusable(): void;
    /** Set an item at a given index focused */
    setItemFocus(index: number, focusElement?: boolean): void;
    /** Focus the previous grab handle */
    setPreviousItemFocus(handle: DashboardGrabHandleDirective): void;
    /** Focus the next grab handle */
    setNextItemFocus(handle: DashboardGrabHandleDirective): void;
    /** Focus the grab handle on the widget above */
    setSiblingItemFocus(widget: DashboardWidgetComponent, direction: ActionDirection): void;
    /** Get handles in the order they appear rather than the order they are in the DOM */
    getHandlesInOrder(handles?: DashboardGrabHandleDirective[]): DashboardGrabHandleDirective[];
    private getHandleIndex;
    /** If the current focusable handle is removed we need to make another one focusable */
    private ensureFocusable;
    static ɵfac: i0.ɵɵFactoryDeclaration<DashboardGrabHandleService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DashboardGrabHandleService>;
}