import { Bridge } from '../Bridge';
import { EventEmitter } from 'twa-core';
import { MainButtonEventsMap } from './events';
import { RGBColor } from 'twa-core';
interface ConOptions {
    isActive?: boolean;
    isVisible?: boolean;
    isProgressVisible?: boolean;
}
declare const ee: EventEmitter<MainButtonEventsMap>;
/**
 * Controls the main button, which is displayed at the bottom
 * of the Web App in the Telegram interface.
 *
 * TODO: Desktop animation is rather bad in case, we call progress visibility
 *  right after click. It is not smooth.
 *
 * TODO: We need event to get current main button state.
 */
export declare class MainButton {
    private bridge;
    private _color;
    private _textColor;
    private _isActive;
    private _isVisible;
    private _isProgressVisible;
    private _text;
    private ee;
    /**
     * Sends current button state to native app.
     * @private
     */
    private commit;
    /**
     * Updates current button color.
     *
     * @param color - color to set.
     * @private
     */
    private set color(value);
    /**
     * Updates current button activity state.
     *
     * @param active - should button be active.
     * @private
     */
    private set isActive(value);
    /**
     * Updates current progress visibility state.
     *
     * @param visible - should progress be visible.
     * @private
     */
    private set isProgressVisible(value);
    /**
     * Updates current button visibility state.
     *
     * @param visible - should button be visible.
     * @private
     */
    private set isVisible(value);
    /**
     * Sets current button text. Note, that minimum text length is 1 symbols
     * and the maximum is 64.
     *
     * @param text - text to set.
     * @throws {Error} Text has incorrect length.
     */
    private set text(value);
    /**
     * Updates current button text color.
     * @param color - target color.
     */
    private set textColor(value);
    constructor(bridge: Bridge, color: RGBColor, textColor: RGBColor, text: string, options?: ConOptions);
    /**
     * Current button color.
     */
    get color(): RGBColor;
    /**
     * Disables button.
     * FIXME: This method does not work on Android. Event "main_button_pressed"
     *  keeps getting received even in case, button is disabled.
     *  Issue: https://github.com/Telegram-Web-Apps/documentation/issues/1
     */
    disable: () => this;
    /**
     * Enables button.
     */
    enable: () => this;
    /**
     * Hides button.
     */
    hide: () => this;
    /**
     * Hides button progress.
     */
    hideProgress: () => this;
    /**
     * Shows whether the button is active.
     */
    get isActive(): boolean;
    /**
     * Shows whether the button is displaying a loading indicator.
     */
    get isProgressVisible(): boolean;
    /**
     * Shows whether the button is visible.
     */
    get isVisible(): boolean;
    /**
     * Adds new event listener.
     * FIXME: Event 'main_button_pressed' is still being received on Android
     *  even if the main button is disabled.
     *  Issue: https://github.com/Telegram-Web-Apps/client-sdk/issues/3
     *
     * @param event - event name.
     * @param listener - event listener.
     */
    on: typeof ee['on'];
    /**
     * Removes event listener.
     *
     * @param event - event name.
     * @param listener - event listener.
     */
    off: typeof ee['off'];
    /**
     * Shows the button. Note that opening the Web App from the attachment
     * menu hides the main button until the user interacts with the Web App
     * interface.
     */
    show: () => this;
    /**
     * A method to show a loading indicator on the button.
     * It is recommended to display loading progress if the action tied to the
     * button may take a long time.
     */
    showProgress: () => this;
    /**
     * Sets new main button text.
     * @param text - new text.
     */
    setText: (text: string) => this;
    /**
     * Sets new main button text color.
     * @param color - new text color.
     */
    setTextColor: (color: RGBColor) => this;
    /**
     * Updates current button color.
     * @param color - color to set.
     */
    setColor: (color: RGBColor) => this;
    /**
     * Current button text.
     */
    get text(): string;
    /**
     * Current button text color.
     */
    get textColor(): RGBColor;
}
export {};