import { FormAssociatedFile } from "./file.form-associated.js";
/**
 * Web component for presenting a file picker dialog and perform some action on the selected files.
 * The component expects a FileAction component as a child which performs the action.
 * Example:
 *   <fast-tooling-file
 *       accept=".jpg,.jpeg,.gif,.png"
 *       @change=${x=>x.myChangeHandler}
 *   >
 *       Add image
 *       <fast-tooling-file-action-objecturl role="fileaction" slot="action"></fast-tooling-file-action-objecturl>
 *   </fast-tooling-file>
 */
export declare class File extends FormAssociatedFile {
    /**
     * Reference to the FileAction that will be performed when files are selected.
     */
    private fileAction;
    /**
     * The list of file types that will be shown in the file picker.
     * Matches syntax for the "accept" attribute of the <file type="file"/> element.
     */
    accept: string;
    /**
     * When true the file picker will allow the selection of multiple files.
     * By default only one file is allowed.
     */
    multiple: boolean;
    /**
     * Callback method for reporting progress of long running FileAction.
     * The progress value is calculated by the FileAction but should be a number between 0 and 1.
     */
    progressCallback: (progress: number) => Promise<void>;
    /**
     * @deprecated
     */
    progressCallbackDepricated: (progress: number) => Promise<void>;
    private progressCallbackDepricatedChanged;
    /**
     * After file(s) are selected this property will contain a string array with the references
     * to the selected files based on the action (i.e. file name, objectUrl, http url, base64 blob, etc).
     */
    fileReferences: string[];
    /**
     * Slot reference for actions slot. When children are added to the slot it searches for the first
     * control with the role="fileaction". Additional actions are ignored.
     */
    action: HTMLSlotElement;
    private actionChanged;
    /**
     * Fast Element lifecycle hook
     */
    connectedCallback(): void;
    /**
     * Click handler for the button. Sets up the proxy element and triggers the click event
     * in order to open the system file picker dialog.
     */
    handleClick(): void;
    /**
     * Change event handler for inner control.
     * @remarks
     * "Change" events are not `composable` so they will not
     * permeate the shadow DOM boundary. This fn effectively proxies
     * the change event, emitting a `change` event whenever the internal
     * control emits a `change` event
     * @internal
     */
    handleChange(e: Event): void;
    /**
     * Determines if a given element is a FileAction web component.
     * @param el - The element to test.
     * @returns - True if the element is a FileAction.
     */
    private isFileAction;
}