import { ElementRef, Injector, OnInit, TemplateRef } from '@angular/core';
import { FormControl } from '@angular/forms';
import { DropdownComponent } from '../../../dropdown/dropdown.component';
import { ValidationAlerts } from '../../../form/validation-alert/validation-alert';
import { SimplePropertySchemaFieldLoaderComponent } from '../../../schema/schema-field-host.component';
import { SmeInternalOptionsFormFieldComponent } from '../options-form-field/options-form-field.component';
import * as i0 from "@angular/core";
export declare type ValueOrArray<T> = T | T[];
export declare class ComboboxFormFieldLoaderComponent extends SimplePropertySchemaFieldLoaderComponent {
    static ɵfac: i0.ɵɵFactoryDeclaration<ComboboxFormFieldLoaderComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<ComboboxFormFieldLoaderComponent, "ng-component", never, {}, {}, never, never, false, never>;
}
/**
 * Accessible Implementation of a form field combo box
 */
export declare class ComboboxFormFieldComponent<T> extends SmeInternalOptionsFormFieldComponent<Array<T>> implements OnInit {
    /**
     * The source name to use for logging
     */
    protected get logSourceName(): string;
    singleSelectTemplate: TemplateRef<any>;
    multiSelectTemplate: TemplateRef<any>;
    listboxElement: ElementRef;
    dropDown: DropdownComponent;
    multiple: boolean;
    overflowWrap: boolean;
    /**
     * Determine if reset search string on collapse dropdown
     */
    maintainSearch: boolean;
    /**
     * Determine if the dropdown will use the sme-form-field to limit its max-width
     */
    dropdownApplyFormFieldOffsetWidth: boolean;
    private dropdownService;
    get isFiltered(): boolean;
    get itemTemplate(): TemplateRef<any>;
    private keyBoardEvent;
    /**
     * Initializes a new instance of the ComboboxFormFieldComponent
     */
    constructor(injector: Injector);
    /**
     * Implementation of angular OnInit interface
     */
    ngOnInit(): void;
    /**
     * Handles keypress events on the dropdown toggle
     */
    onToggleKeyPress(event: KeyboardEvent): void;
    /**
     * Handles toggled state changes
     */
    onDropdownToggled(expanded: boolean): void;
    /**
     * Handles event emitted when focus leaves input field
     */
    onBlur(): void;
    /**
     * Handles event emitted on key press in search form input field
     * @param event
     */
    onKeyDownEvent(event: KeyboardEvent): void;
    private getFirstOption;
    /**
     * Handles keydown events on the dropdown toggle
     */
    onToggleKeydown(event: KeyboardEvent): void;
    /**
     * Handles keydown events on option changes
     */
    onListboxKeydown(event: KeyboardEvent): void;
    onSearchFormKeydown(event: KeyboardEvent): void;
    /**
     * Creates the idBag used by this component to store unique element ids.
     * id values will be assigned be the @see BaseComponent super class.
     */
    protected createIdBag(): MsftSme.StringMap<string>;
    /**
     * Performs validation that is internal to this control
     * @param c The form control attached to this instance
     */
    protected validate(c: FormControl): ValidationAlerts;
    /**
     * On searchString model change
     */
    onSearchStringChange(): void;
    private updatePosition;
    /**
     * It handles calculating and updating the styles for each of the options inside
     * of the dropdown container, because the dropdown container's width is dynamic,
     * have to calculate option as well.
     */
    private applySingleOptionWidth;
    /**
     * This handles getting the current width being applied by the dropdown service
     */
    private getSingleDropdownOptionWidth;
    static ɵfac: i0.ɵɵFactoryDeclaration<ComboboxFormFieldComponent<any>, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<ComboboxFormFieldComponent<any>, "sme-form-field[type=\"combobox\"],sme-form-field[type=\"select\"]", never, { "multiple": "multiple"; "overflowWrap": "overflowWrap"; "maintainSearch": "maintainSearch"; "dropdownApplyFormFieldOffsetWidth": "dropdownApplyFormFieldOffsetWidth"; }, {}, never, never, false, never>;
}