import { DataField } from '../../models/abstract-data-field';
import { Behavior } from '../../models/behavior';
import { Layout } from '../../models/layout';
import { FileFieldValue } from './file-field-value';
import { Observable } from 'rxjs';
import { Component } from '../../models/component';
import { FormControl } from '@angular/forms';
import { Validation } from '../../models/validation';
import { ChangedFieldsMap } from '../../../event/services/interfaces/changed-fields-map';
/**
 * Supported types of files a user can select through a file picker.
 */
export declare enum FileUploadMIMEType {
    IMAGE = "image/*",
    VIDEO = "video/*",
    AUDIO = "audio/*",
    PDF = ".pdf",
    JPG_JPEG = ".jpg,.jpeg",
    XML = ".xml",
    DOC_DOCX = ".doc,.docx",
    XLS_XLSX = ".xls,.xlsx"
}
/**
 * Supported types for file preview
 */
export declare enum FilePreviewType {
    pdf = 0,
    jpg = 1,
    jpeg = 2,
    png = 3
}
/**
 * Extended structure for file by name and extension.
 */
export interface FileUploadDataModel {
    file: File;
    name: string;
    extension: string;
}
/**
 * Holds information represent file field implements in Petri Net
 */
export declare class FileField extends DataField<FileFieldValue> {
    private _maxUploadSizeInBytes?;
    private _allowTypes?;
    /**
     * Specifies the size of all uploaded files in bytes.
     *
     * It is an indicator for checking the oversized size in the Petri Net.
     */
    filesSize: number;
    /**
     * Used to forward the result of the upload file backend call to the task content
     */
    private _changedFields$;
    downloaded: boolean;
    set value(value: FileFieldValue);
    get value(): FileFieldValue;
    get updated(): Observable<void>;
    getTypedComponentType(): string;
    valueWithoutChange(value: FileFieldValue): void;
    /**
     * Create new instance for file field with all his properties.
     *
     * Placeholder is a substitute for the value name if not set value.
     */
    constructor(stringId: string, title: string, behavior: Behavior, value?: FileFieldValue, placeholder?: string, description?: string, layout?: Layout, _maxUploadSizeInBytes?: number, _allowTypes?: string | FileUploadMIMEType | Array<FileUploadMIMEType>, validations?: Array<Validation>, component?: Component, parentTaskId?: string);
    get maxUploadSizeInBytes(): number;
    get allowTypes(): string;
    get changedFields$(): Observable<ChangedFieldsMap>;
    emitChangedFields(change: ChangedFieldsMap): void;
    protected valueEquality(a: FileFieldValue, b: FileFieldValue): boolean;
    registerFormControl(formControl: FormControl): void;
    protected updateFormControlState(formControl: FormControl): void;
}