/**
 *              Copyright (c) 2025 Visa, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 **/
import { BooleanInput, NumberInput } from '@angular/cdk/coercion';
import { AfterContentInit, ChangeDetectorRef, ElementRef, EventEmitter, QueryList, WritableSignal } from '@angular/core';
import { ControlValueAccessor } from '@angular/forms';
import { AppReadyService } from '../_utilities/services/app-stable-check.service';
import { UUIDService } from '../_utilities/services/uuid.service';
import { ListboxItemComponent } from '../listbox-item/listbox-item.component';
import { NovaLibService } from '../nova-lib.service';
import { ListboxService } from './listbox.service';
import * as i0 from "@angular/core";
export declare class ListboxDirective implements ControlValueAccessor, AfterContentInit {
    private uuidService;
    private novaLibService;
    private listboxService;
    private cdRef;
    el: ElementRef;
    private appReadyService;
    listItems: QueryList<ListboxItemComponent>;
    _isRoleListboxVariant: WritableSignal<boolean>;
    _childrenDisabled: boolean;
    _childrenInvalid: boolean;
    _internalValue: (string | number)[] | string | number | null;
    _inCombobox: boolean;
    _listboxHeight: number;
    _listboxItemHeight: number;
    _listboxGap: number;
    _listboxScrollStylesSet: boolean;
    _keyword: String;
    _highlightIndex: number | null;
    _isHotkeyEvent: Boolean;
    _recentSelectedIndex: number | null;
    _timeoutId: number;
    ariaActiveDescendant: WritableSignal<string | null>;
    /**
     * Provides custom class&#40;es&#41; for custom styling.
     * @default .v-listbox
     */
    get class(): string;
    set class(value: string);
    _class: string;
    get hostClass(): string;
    /**
     * Sets custom id.
     * @default uuidService.getUUID('v-listbox-')
     * @builtin true
     */
    id: string;
    get hostId(): string;
    /**
     * Sets listbox to multiselect variant when true.
     * @default false
     */
    get multiselect(): boolean;
    set multiselect(value: BooleanInput);
    _multiselect: boolean;
    /**
     * Sets component and any ListboxItemComponent children as disabled when true. <br>
     * Will automatically become true if all children are disabled.
     * @default false
     */
    get disabled(): boolean;
    set disabled(value: BooleanInput);
    _disabled: boolean;
    /** Fires when a formControl's disabled state updates  */
    setDisabledState(isDisabled: boolean): void;
    /**
     * Sets component and any ListboxItemComponent children as invalid when true. <br>
     * Will automatically become true if any child is invalid.
     * @default false
     */
    get invalid(): boolean;
    set invalid(value: BooleanInput);
    _invalid: boolean;
    /**
     * Marks component as required when true.
     * @default false
     */
    get required(): boolean;
    set required(value: BooleanInput);
    _required: boolean;
    /**
     * Sets custom role.
     * @default 'group' if no child list item contains a child radio or checkbox.
     * @default not present if any child list item contains a child radio or checkbox.
     * @builtin true
     */
    role: string;
    get hostRole(): string;
    /**
     * Sets CSS variable <code>--v-listbox-block-size-scroll</code>. <br />
     * If true, the default 180px will be the listbox's <code>max-block-size</code>. <br />
     * If set to a number or string representing a number (ie <code>[containHeight]="250"</code>), the variable will be set to that amount of pixels.
     */
    get containHeight(): NumberInput | BooleanInput;
    set containHeight(value: NumberInput | BooleanInput);
    _containHeight: NumberInput | BooleanInput;
    get scrollHeight(): NumberInput | void | boolean;
    /**
     * Value of listbox.
     */
    get value(): (string | number)[] | string | number | null;
    set value(value: (string | number)[] | string | number | null);
    get val(): (string | number)[] | string | number | null;
    set val(value: (string | number)[] | string | number | null);
    setValue(value: (string | number)[] | string | number | null): void;
    _value: string | number | (string | number)[] | null;
    /**
     * Overrides default scroll control behavior. <br />
     * By default the listbox will scroll to the last selected item.
     * @default false
     */
    get customScrollControl(): boolean;
    set customScrollControl(value: BooleanInput);
    _customScrollControl: boolean;
    /**
     * Emits disabled, invalid, and required state of input when updated.
     */
    communicateState: EventEmitter<any>;
    /**
     * Emits new listbox value.
     */
    valueUpdated: EventEmitter<any>;
    constructor(uuidService: UUIDService, novaLibService: NovaLibService, listboxService: ListboxService, cdRef: ChangeDetectorRef, el: ElementRef, appReadyService: AppReadyService);
    handleFocus(event: Event): void;
    handleBlur(event: Event): void;
    ngAfterContentInit(): void;
    setUpListbox(): void;
    setInitialValue(): void;
    addListItemSubscriptions(): void;
    updateItemsFromValue(): void;
    updateValueFromItems(): void;
    setChildrenDisabled(): void;
    setChildrenInvalid(): void;
    onChange: (_: any) => void;
    onTouched: (_: any) => void;
    registerOnChange(fn: any): void;
    registerOnTouched(fn: any): void;
    writeValue(value: any): void;
    resetListbox(): void;
    informState(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<ListboxDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ListboxDirective, "[v-listbox] ", never, { "class": { "alias": "class"; "required": false; }; "id": { "alias": "id"; "required": false; }; "multiselect": { "alias": "multiselect"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; "invalid": { "alias": "invalid"; "required": false; }; "required": { "alias": "required"; "required": false; }; "role": { "alias": "role"; "required": false; }; "containHeight": { "alias": "containHeight"; "required": false; }; "value": { "alias": "value"; "required": false; }; "customScrollControl": { "alias": "customScrollControl"; "required": false; }; }, { "communicateState": "communicateState"; "valueUpdated": "valueUpdated"; }, ["listItems"], never, true, never>;
}