import { FocusMonitor } from '@angular/cdk/a11y';
import { AfterViewInit, ChangeDetectorRef, DoCheck, ElementRef, EventEmitter, InjectionToken, OnDestroy, OnInit, QueryList, TemplateRef } from '@angular/core';
import { ControlValueAccessor, FormGroupDirective, NgControl, NgForm } from '@angular/forms';
import { ErrorStateMatcher } from '@angular/material/core';
import { MatFormField, MatFormFieldControl } from '@angular/material/form-field';
import { NgSelectComponent } from '@ng-select/ng-select';
import { Subject } from 'rxjs';
import { MtxOption } from './option';
import * as i0 from "@angular/core";
export type DropdownPosition = 'bottom' | 'top' | 'auto';
export type AddTagFn = (term: string) => any;
export type CompareWithFn = (a: any, b: any) => boolean;
export type GroupValueFn = (key: string | Record<string, any>, children: any[]) => string | Record<string, any>;
export type SearchFn = (term: string, item: any) => boolean;
export type TrackByFn = (item: any) => any;
/**
 * Represents the default options for the select that can be configured
 * using the `MTX_SELECT_DEFAULT_OPTIONS` injection token.
 */
export interface MtxSelectDefaultOptions {
    placeholder?: string;
    notFoundText?: string;
    typeToSearchText?: string;
    addTagText?: string;
    loadingText?: string;
    clearAllText?: string;
    appendTo?: string;
    bindValue?: string;
    bindLabel?: string;
    openOnEnter?: boolean;
    clearSearchOnAdd?: boolean;
}
/** Injection token that can be used to specify default select options. */
export declare const MTX_SELECT_DEFAULT_OPTIONS: InjectionToken<MtxSelectDefaultOptions>;
export declare class MtxSelect implements OnInit, OnDestroy, DoCheck, AfterViewInit, ControlValueAccessor, MatFormFieldControl<any> {
    protected _changeDetectorRef: ChangeDetectorRef;
    protected _elementRef: ElementRef;
    protected _focusMonitor: FocusMonitor;
    ngControl: NgControl;
    protected _parentFormField?: MatFormField | undefined;
    protected _defaultOptions?: MtxSelectDefaultOptions | undefined;
    ngSelect: NgSelectComponent;
    optionTemplate: TemplateRef<any>;
    optgroupTemplate: TemplateRef<any>;
    labelTemplate: TemplateRef<any>;
    multiLabelTemplate: TemplateRef<any>;
    headerTemplate: TemplateRef<any>;
    footerTemplate: TemplateRef<any>;
    notFoundTemplate: TemplateRef<any>;
    typeToSearchTemplate: TemplateRef<any>;
    loadingTextTemplate: TemplateRef<any>;
    tagTemplate: TemplateRef<any>;
    loadingSpinnerTemplate: TemplateRef<any>;
    placeholderTemplate: TemplateRef<any>;
    mtxOptions: QueryList<MtxOption>;
    addTag: boolean | AddTagFn;
    addTagText: string;
    appearance: string;
    appendTo: string;
    bindLabel: string | undefined;
    bindValue: string | undefined;
    closeOnSelect: boolean;
    clearAllText: string;
    clearable: boolean;
    clearOnBackspace: boolean;
    compareWith: CompareWithFn;
    dropdownPosition: DropdownPosition;
    groupBy: string | ((value: any) => any);
    groupValue: GroupValueFn;
    bufferAmount: number;
    selectableGroup: boolean;
    selectableGroupAsModel: boolean;
    hideSelected: boolean;
    loading: boolean;
    loadingText: string;
    labelForId: string | null;
    markFirst: boolean;
    maxSelectedItems: number;
    multiple: boolean;
    notFoundText: string;
    searchable: boolean;
    readonly: boolean;
    searchFn: SearchFn | null;
    searchWhileComposing: boolean;
    selectOnTab: boolean;
    trackByFn: TrackByFn | null;
    inputAttrs: {
        [key: string]: string;
    };
    tabIndex: number;
    openOnEnter: boolean;
    minTermLength: number;
    editableSearchTerm: boolean;
    keyDownFn: (_: KeyboardEvent) => boolean;
    virtualScroll: boolean;
    typeToSearchText: string;
    typeahead: Subject<string>;
    isOpen?: boolean;
    blurEvent: EventEmitter<any>;
    focusEvent: EventEmitter<any>;
    changeEvent: EventEmitter<any>;
    openEvent: EventEmitter<any>;
    closeEvent: EventEmitter<any>;
    searchEvent: EventEmitter<{
        term: string;
        items: any[];
    }>;
    clearEvent: EventEmitter<any>;
    addEvent: EventEmitter<any>;
    removeEvent: EventEmitter<any>;
    scroll: EventEmitter<{
        start: number;
        end: number;
    }>;
    scrollToEnd: EventEmitter<any>;
    get clearSearchOnAdd(): boolean;
    set clearSearchOnAdd(value: boolean);
    private _clearSearchOnAdd;
    get items(): any[];
    set items(value: any[]);
    private _items;
    private _itemsAreUsed;
    /** Emits whenever the component is destroyed. */
    private readonly _destroy$;
    /** Value of the select control. */
    get value(): any;
    set value(newValue: any);
    private _value;
    /** Implemented as part of MatFormFieldControl. */
    readonly stateChanges: Subject<void>;
    /** Unique id of the element. */
    get id(): string;
    set id(value: string);
    private _id;
    /** Unique id for this select. */
    private _uid;
    /** Placeholder to be shown if value is empty. */
    get placeholder(): string;
    set placeholder(value: string);
    private _placeholder;
    /** Whether the select is focused. */
    get focused(): boolean;
    private _focused;
    /** Whether the select has a value. */
    get empty(): boolean;
    /**
     * Implemented as part of MatFormFieldControl.
     * @docs-private
     */
    get shouldLabelFloat(): boolean;
    /** Whether the select is disabled. */
    disabled: boolean;
    /** Whether the component is required. */
    get required(): boolean;
    set required(value: boolean);
    private _required;
    /** Object used to control when error messages are shown. */
    get errorStateMatcher(): ErrorStateMatcher;
    set errorStateMatcher(value: ErrorStateMatcher);
    /** Aria label of the select. */
    ariaLabel: string;
    /** Input that can be used to specify the `aria-labelledby` attribute. */
    ariaLabelledby: string | null;
    /** The aria-describedby attribute on the select for improved a11y. */
    _ariaDescribedby: string | null;
    /** A name for this control that can be used by `mat-form-field`. */
    controlType: string;
    /** `View -> model callback called when value changes` */
    _onChange: (value: any) => void;
    /** `View -> model callback called when select has been touched` */
    _onTouched: () => void;
    /** ID for the DOM node containing the select's value. */
    _valueId: string;
    /** Whether or not the overlay panel is open. */
    get panelOpen(): boolean;
    /**
     * Keeps track of the previous form control assigned to the select.
     * Used to detect if it has changed.
     */
    private _previousControl;
    /** Tracks the error state of the select. */
    private _errorStateTracker;
    /** Whether the select is in an error state. */
    get errorState(): boolean;
    set errorState(value: boolean);
    constructor(_changeDetectorRef: ChangeDetectorRef, _elementRef: ElementRef, _focusMonitor: FocusMonitor, defaultErrorStateMatcher: ErrorStateMatcher, parentForm: NgForm, parentFormGroup: FormGroupDirective, ngControl: NgControl, _parentFormField?: MatFormField | undefined, _defaultOptions?: MtxSelectDefaultOptions | undefined);
    ngOnInit(): void;
    ngAfterViewInit(): void;
    ngDoCheck(): void;
    ngOnDestroy(): void;
    /** Gets the value for the `aria-labelledby` attribute of the inputs. */
    _getAriaLabelledby(): string | null;
    /** Implemented as part of MatFormFieldControl. */
    setDescribedByIds(ids: string[]): void;
    /**
     * Disables the select. Part of the ControlValueAccessor interface required
     * to integrate with Angular's core forms API.
     *
     * @param isDisabled Sets whether the component is disabled.
     */
    setDisabledState(isDisabled: boolean): void;
    /** Implemented as part of MatFormFieldControl. */
    onContainerClick(event: MouseEvent): void;
    /**
     * Sets the select's value. Part of the ControlValueAccessor interface
     * required to integrate with Angular's core forms API.
     *
     * @param value New value to be written to the model.
     */
    writeValue(value: any): void;
    /**
     * Saves a callback function to be invoked when the select's value
     * changes from user input. Part of the ControlValueAccessor interface
     * required to integrate with Angular's core forms API.
     *
     * @param fn Callback to be triggered when the value changes.
     */
    registerOnChange(fn: any): void;
    /**
     * Saves a callback function to be invoked when the select is blurred
     * by the user. Part of the ControlValueAccessor interface required
     * to integrate with Angular's core forms API.
     *
     * @param fn Callback to be triggered when the component has been touched.
     */
    registerOnTouched(fn: any): void;
    /** Refreshes the error state of the select. */
    updateErrorState(): void;
    /** Assigns a specific value to the select. Returns whether the value has changed. */
    private _assignValue;
    /** NgSelect's `_setItemsFromNgOptions` */
    private _setItemsFromMtxOptions;
    open(): void;
    close(): void;
    focus(): void;
    blur(): void;
    openChange(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MtxSelect, [null, null, null, null, { optional: true; }, { optional: true; }, { optional: true; self: true; }, { optional: true; }, { optional: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MtxSelect, "mtx-select", ["mtxSelect"], { "addTag": { "alias": "addTag"; "required": false; }; "addTagText": { "alias": "addTagText"; "required": false; }; "appearance": { "alias": "appearance"; "required": false; }; "appendTo": { "alias": "appendTo"; "required": false; }; "bindLabel": { "alias": "bindLabel"; "required": false; }; "bindValue": { "alias": "bindValue"; "required": false; }; "closeOnSelect": { "alias": "closeOnSelect"; "required": false; }; "clearAllText": { "alias": "clearAllText"; "required": false; }; "clearable": { "alias": "clearable"; "required": false; }; "clearOnBackspace": { "alias": "clearOnBackspace"; "required": false; }; "compareWith": { "alias": "compareWith"; "required": false; }; "dropdownPosition": { "alias": "dropdownPosition"; "required": false; }; "groupBy": { "alias": "groupBy"; "required": false; }; "groupValue": { "alias": "groupValue"; "required": false; }; "bufferAmount": { "alias": "bufferAmount"; "required": false; }; "selectableGroup": { "alias": "selectableGroup"; "required": false; }; "selectableGroupAsModel": { "alias": "selectableGroupAsModel"; "required": false; }; "hideSelected": { "alias": "hideSelected"; "required": false; }; "loading": { "alias": "loading"; "required": false; }; "loadingText": { "alias": "loadingText"; "required": false; }; "labelForId": { "alias": "labelForId"; "required": false; }; "markFirst": { "alias": "markFirst"; "required": false; }; "maxSelectedItems": { "alias": "maxSelectedItems"; "required": false; }; "multiple": { "alias": "multiple"; "required": false; }; "notFoundText": { "alias": "notFoundText"; "required": false; }; "searchable": { "alias": "searchable"; "required": false; }; "readonly": { "alias": "readonly"; "required": false; }; "searchFn": { "alias": "searchFn"; "required": false; }; "searchWhileComposing": { "alias": "searchWhileComposing"; "required": false; }; "selectOnTab": { "alias": "selectOnTab"; "required": false; }; "trackByFn": { "alias": "trackByFn"; "required": false; }; "inputAttrs": { "alias": "inputAttrs"; "required": false; }; "tabIndex": { "alias": "tabIndex"; "required": false; }; "openOnEnter": { "alias": "openOnEnter"; "required": false; }; "minTermLength": { "alias": "minTermLength"; "required": false; }; "editableSearchTerm": { "alias": "editableSearchTerm"; "required": false; }; "keyDownFn": { "alias": "keyDownFn"; "required": false; }; "virtualScroll": { "alias": "virtualScroll"; "required": false; }; "typeToSearchText": { "alias": "typeToSearchText"; "required": false; }; "typeahead": { "alias": "typeahead"; "required": false; }; "isOpen": { "alias": "isOpen"; "required": false; }; "clearSearchOnAdd": { "alias": "clearSearchOnAdd"; "required": false; }; "items": { "alias": "items"; "required": false; }; "value": { "alias": "value"; "required": false; }; "id": { "alias": "id"; "required": false; }; "placeholder": { "alias": "placeholder"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; "required": { "alias": "required"; "required": false; }; "errorStateMatcher": { "alias": "errorStateMatcher"; "required": false; }; "ariaLabel": { "alias": "aria-label"; "required": false; }; "ariaLabelledby": { "alias": "aria-labelledby"; "required": false; }; }, { "blurEvent": "blur"; "focusEvent": "focus"; "changeEvent": "change"; "openEvent": "open"; "closeEvent": "close"; "searchEvent": "search"; "clearEvent": "clear"; "addEvent": "add"; "removeEvent": "remove"; "scroll": "scroll"; "scrollToEnd": "scrollToEnd"; }, ["optionTemplate", "optgroupTemplate", "labelTemplate", "multiLabelTemplate", "headerTemplate", "footerTemplate", "notFoundTemplate", "typeToSearchTemplate", "loadingTextTemplate", "tagTemplate", "loadingSpinnerTemplate", "placeholderTemplate", "mtxOptions"], never, true, never>;
    static ngAcceptInputType_closeOnSelect: unknown;
    static ngAcceptInputType_clearable: unknown;
    static ngAcceptInputType_clearOnBackspace: unknown;
    static ngAcceptInputType_selectableGroup: unknown;
    static ngAcceptInputType_selectableGroupAsModel: unknown;
    static ngAcceptInputType_hideSelected: unknown;
    static ngAcceptInputType_loading: unknown;
    static ngAcceptInputType_markFirst: unknown;
    static ngAcceptInputType_multiple: unknown;
    static ngAcceptInputType_searchable: unknown;
    static ngAcceptInputType_readonly: unknown;
    static ngAcceptInputType_searchWhileComposing: unknown;
    static ngAcceptInputType_selectOnTab: unknown;
    static ngAcceptInputType_openOnEnter: unknown;
    static ngAcceptInputType_editableSearchTerm: unknown;
    static ngAcceptInputType_virtualScroll: unknown;
    static ngAcceptInputType_disabled: unknown;
    static ngAcceptInputType_required: unknown;
}