import { DoCheck, ElementRef, OnDestroy } from '@angular/core';
import { ControlValueAccessor, FormGroupDirective, NgControl, NgForm } from '@angular/forms';
import { HcFormControlComponent } from '../form-field/index';
import { FileUpload } from './file-upload';
import { FileReaderFactory } from './file-reader-factory.service';
export declare class FileInputComponent extends HcFormControlComponent implements ControlValueAccessor, OnDestroy, DoCheck {
    private _fileReaderFactory;
    _ngControl: NgControl;
    disabled: boolean;
    /**
     * The `accept` value to use on the HTML `input` element
     * > W3C recommends authors to specify both MIME-types and corresponding extensions in the accept attribute.
     * see https://stackoverflow.com/a/23706177/1396477
     * @example '.xls,.xlsx, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel'
     */
    accept: string;
    /** Custom label to be displayed on the button. Default: Upload file */
    label: string;
    /** Custom buttonStyle to be used on the button. See Button component for valid buttonStyles. Default: secondary */
    buttonStyle: string;
    /** Custom color for the Chip after a file has been selected. See Chip component for valid colors. Default: neutral */
    chipColor: string;
    /** Whether the chips that represent the uploaded files should be stacked or wrapped. Default: wrapped */
    stackedUploads: boolean;
    _fileInput: ElementRef<HTMLInputElement>;
    private readonly onDestroy;
    private _value;
    value: FileUpload[] | null;
    private _form;
    constructor(_fileReaderFactory: FileReaderFactory, _ngControl: NgControl, form: NgForm, formGroup: FormGroupDirective);
    ngOnDestroy(): void;
    ngDoCheck(): void;
    private _updateErrorState;
    _onClick(): void;
    _deleteFile(file: FileUpload): void;
    _onFileSelected(): void;
    _onBlur(): void;
    writeValue(value: FileUpload[] | null): void;
    registerOnChange(fn: any): void;
    registerOnTouched(fn: any): void;
    setDisabledState(isDisabled: boolean): void;
    private onChange;
    private onTouched;
}