/// <reference types="dom-speech-recognition" />
/**
 * Speech to text class
 * uses webkitSpeechRecognition
 */
export declare class SpeechToText {
    query: string | null;
    recognition?: SpeechRecognition;
    listening: boolean;
    error?: SpeechRecognitionErrorEvent | Error;
    initialized: boolean;
    constructor();
    /**
     * initialize the speech recognition
     * @param continuous - if true, the speech recognition will continue listening after each recognition
     */
    init: (continuous: boolean) => void;
    /**
     * Sets query - the last result from the speech recognition
     * @param query - the query to set
     */
    setQuery: (query: string | null) => void;
    /**
     * Upgrade the speech recognition
     */
    upgrade: () => void;
    /**
     *
     * @param event - the speech recognition event
     */
    onResult: (event: SpeechRecognitionEvent) => void;
    /**
     * Start the speech recognition
     */
    start: () => void;
    /**
     * Stop the speech recognition
     */
    stop: () => void;
    /**
     * mark speech recognition as initialized
     * @param initialized - set the initialized state
     */
    setInitialized: (initialized: boolean) => void;
    /**
     * Sets the listening state
     * @param listening - set the listening state
     */
    setListening: (listening: boolean) => void;
    /**
     *
     * @param error - set the error
     */
    setError: (error: SpeechRecognitionErrorEvent | Error) => void;
    /**
     * Called when the speech recognition starts
     */
    onstart: () => void;
    /**
     * Called when the speech recognition ends
     */
    onend: () => void;
    /**
     * Called when the speech recognition errors
     * @param error - the error
     */
    onerror: (error: SpeechRecognitionErrorEvent) => void;
    /**
     * Cancel the speech recognition
     */
    cancel: () => void;
    /**
     * Restart the speech recognition
     * @param continuous - if true, the speech recognition will continue
     * listening after each recognition
     */
    restart: (continuous?: boolean) => void;
}