import { Message } from 'phosphor-messaging';
import { Widget } from 'phosphor-widget';
import { FileBrowserModel } from './model';
/**
 * A class which hosts folder breadcrumbs.
 */
export declare class BreadCrumbs extends Widget {
    /**
     * Construct a new file browser crumb widget.
     *
     * @param model - The file browser view model.
     */
    constructor(model: FileBrowserModel);
    /**
     * Handle the DOM events for the bread crumbs.
     *
     * @param event - The DOM event sent to the widget.
     *
     * #### Notes
     * This method implements the DOM `EventListener` interface and is
     * called in response to events on the panel's DOM node. It should
     * not be called directly by user code.
     */
    handleEvent(event: Event): void;
    /**
     * A message handler invoked on an `'after-attach'` message.
     */
    protected onAfterAttach(msg: Message): void;
    /**
     * A message handler invoked on a `'before-detach'` message.
     */
    protected onBeforeDetach(msg: Message): void;
    /**
     * A handler invoked on an `'update-request'` message.
     */
    protected onUpdateRequest(msg: Message): void;
    /**
     * Handle the `'click'` event for the widget.
     */
    private _evtClick(event);
    /**
     * Handle the `'p-dragenter'` event for the widget.
     */
    private _evtDragEnter(event);
    /**
     * Handle the `'p-dragleave'` event for the widget.
     */
    private _evtDragLeave(event);
    /**
     * Handle the `'p-dragover'` event for the widget.
     */
    private _evtDragOver(event);
    /**
     * Handle the `'p-drop'` event for the widget.
     */
    private _evtDrop(event);
    private _model;
    private _crumbs;
    private _crumbSeps;
}