import { AfterContentInit, ChangeDetectorRef, DoCheck, ElementRef, EventEmitter, OnInit, QueryList, Renderer2 } from '@angular/core';
import { ControlValueAccessor, FormControl, FormGroupDirective, NgControl, NgForm } from '@angular/forms';
import { TypeaheadItemComponent } from './typeahead-item/typeahead-item.component';
import { HcFormControlComponent } from '../form-field/hc-form-control.component';
import { Subscription } from 'rxjs';
export declare class TypeaheadComponent extends HcFormControlComponent implements OnInit, AfterContentInit, ControlValueAccessor, DoCheck {
    private _elementRef;
    private renderer;
    private cd;
    private _document;
    _ngControl: NgControl;
    private DIRECTION;
    private IGNORE_DEBOUNCE;
    _searchTerm: FormControl;
    _resultPanelHidden: boolean;
    _value: string;
    private _form;
    private _wasClick;
    /** Number of characters required before the typehead will begin searching, default 1 */
    minChars: number;
    /** Placeholder text for the input box of the typeahead, no default */
    placeholder: string;
    /** The amount of time in milliseconds to delay between keystrokes */
    /** before emitting the valueChange event for the input, default 200 */
    debounceTime: number;
    /** Toggle to show and hide the searching spinner to provide the user with feedback */
    /** (it does not automatically turn on and off, you need to manually control it), default false */
    showSpinner: boolean;
    /** Whether the focus event should emit a valueChange event and show the results. */
    /** If set to true, then it will not emit the event nor show results until the user modifies the value */
    /** in the input or the input value is empty. */
    /** This is necessary to enable a user to be able to tab through the typeahead without clearing its value. */
    /** Default is true. */
    silentFocus: boolean;
    /** Event emitted after each key stroke in the typeahead box (after minChars requirement has been met) */
    valueChange: EventEmitter<any>;
    /** Event emitted when an option is selected from the list of typeahead results */
    optionSelected: EventEmitter<any>;
    /** Event emitted when the user hits enter and there is not an option selected (or no results available yet) */
    emptyOptionSelected: EventEmitter<any>;
    /** Event emitted when the input box of the typeahead loses focus */
    blur: EventEmitter<any>;
    _options: QueryList<TypeaheadItemComponent>;
    _inputRef: ElementRef;
    _resultPanel: ElementRef;
    _optionSubscriptions: Array<Subscription>;
    constructor(_elementRef: ElementRef, renderer: Renderer2, cd: ChangeDetectorRef, _parentForm: NgForm, _parentFormGroup: FormGroupDirective, _document: any, _ngControl: NgControl);
    ngOnInit(): void;
    ngAfterContentInit(): void;
    private listenForSelection;
    _stopPropogation($event: any): void;
    _handleTabKey($event: any): void;
    _filterData(value: string): void;
    _handleKeystrokes($event: any): void;
    private scrollTop;
    private getOptionScrollPosition;
    private showResultPanel;
    private hideResultPanel;
    private itemSelectedDefault;
    private changeHighlighted;
    private setHighlighted;
    private onChange;
    private onTouched;
    _markAsDirty(): void;
    _markAsTouched(): void;
    registerOnChange(fn: any): void;
    registerOnTouched(fn: any): void;
    writeValue(value: string): void;
    /** Get or set the value of the select component */
    value: string;
    /** Enables or disables the component, default false */
    isDisabled: boolean;
    /** Sets whether this is a required form element */
    required: boolean;
    ngDoCheck(): void;
    private _updateErrorState;
    _blurHandler(event: any): void;
    _clickHandler(event: any): void;
    _focusHandler(event: any): void;
    _getHighlightedIndex(): number;
    setFocus(): void;
}