import { BasePlugin } from '../base';
export declare const PLUGIN_KEY = "emptyDataState";
export declare const PLUGIN_PRIORITY = 370;
/**
 * @plugin EmptyDataState
 * @class EmptyDataState
 *
 * @description
 * The empty data state plugin provides a empty data state overlay system for Handsontable.
 * It displays a empty data state overlay with customizable message.
 *
 * In order to enable the empty data state mechanism, {@link Options#emptyDataState} option must be set to `true`.
 *
 * When [[Options#dataProvider]] is enabled, the loading overlay is toggled from DataProvider fetch hooks
 * ([[Hooks#beforeDataProviderFetch]], [[Hooks#afterDataProviderFetch]], [[Hooks#afterDataProviderFetchError]]).
 *
 * The plugin provides several configuration options to customize the empty data state behavior and appearance:
 * - `message`: Message to display in the empty data state overlay.
 *   - `title`: Title to display in the empty data state overlay.
 *   - `description`: Description to display in the empty data state overlay.
 *   - `buttons`: Buttons to display in the empty data state overlay.
 *     - `text`: Text to display in the button.
 *     - `type`: Type of the button.
 *     - `callback`: Callback function to call when the button is clicked.
 *
 * @example
 * ::: only-for javascript
 * ```javascript
 * // Enable empty data state plugin with default messages
 * emptyDataState: true,
 *
 * // Enable empty data state plugin with custom message
 * emptyDataState: {
 *   message: 'No data available',
 * },
 *
 * // Enable empty data state plugin with custom message and buttons for any source
 * emptyDataState: {
 *   message: {
 *     title: 'No data available',
 *     description: 'There’s nothing to display yet.',
 *     buttons: [{ text: 'Reset filters', type: 'secondary', callback: () => {} }],
 *   },
 * },
 *
 * // Enable empty data state plugin with custom message and buttons for specific source
 * emptyDataState: {
 *   message: (source) => {
 *     switch (source) {
 *       case "filters":
 *         return {
 *           title: 'No data available',
 *           description: 'There’s nothing to display yet.',
 *           buttons: [{ text: 'Reset filters', type: 'secondary', callback: () => {} }],
 *         };
 *       case "loading":
 *         return {
 *           title: 'Loading data',
 *           description: 'Please wait.',
 *         };
 *       default:
 *         return {
 *           title: 'No data available',
 *           description: 'There’s nothing to display yet.',
 *         };
 *     }
 *   },
 * },
 * ```
 * :::
 *
 * ::: only-for react
 * ```jsx
 * // Enable empty data state plugin with default messages
 * <HotTable emptyDataState={true} />;
 *
 * // Enable empty data state plugin with custom message
 * <HotTable emptyDataState={{ message: 'No data available' }} />;
 *
 * // Enable empty data state plugin with custom message and buttons for any source
 * <HotTable emptyDataState={{
 *   message: {
 *     title: 'No data available',
 *     description: 'There’s nothing to display yet.',
 *     buttons: [{ text: 'Reset filters', type: 'secondary', callback: () => {} }],
 *   }
 * }} />;
 *
 * // Enable empty data state plugin with custom message and buttons for specific source
 * <HotTable emptyDataState={{
 *   message: (source) => {
 *     switch (source) {
 *       case "filters":
 *         return {
 *           title: 'No data available',
 *           description: 'There’s nothing to display yet.',
 *           buttons: [{ text: 'Reset filters', type: 'secondary', callback: () => {} }],
 *         };
 *       case "loading":
 *         return {
 *           title: 'Loading data',
 *           description: 'Please wait.',
 *         };
 *       default:
 *         return {
 *           title: 'No data available',
 *           description: 'There’s nothing to display yet.',
 *         };
 *     }
 *   }
 * }} />;
 * ```
 * :::
 *
 * ::: only-for angular
 * ```ts
 * // Enable empty data state plugin with default messages
 * hotSettings: Handsontable.GridSettings = {
 *   emptyDataState: true
 * }
 *
 * // Enable empty data state plugin with custom message
 * hotSettings: Handsontable.GridSettings = {
 *   emptyDataState: {
 *     message: 'No data available'
 *   }
 * }
 *
 * // Enable empty data state plugin with custom message and buttons for any source
 * hotSettings: Handsontable.GridSettings = {
 *   emptyDataState: {
 *     message: {
 *       title: 'No data available',
 *       description: 'There’s nothing to display yet.',
 *       buttons: [{ text: 'Reset filters', type: 'secondary', callback: () => {} }],
 *     },
 *   },
 * },
 *
 * // Enable empty data state plugin with custom message and buttons for specific source
 * hotSettings: Handsontable.GridSettings = {
 *   emptyDataState: {
 *     message: (source) => {
 *       switch (source) {
 *         case "filters":
 *           return {
 *             title: 'No data available for filters',
 *             description: 'There’s nothing to display yet.',
 *             buttons: [{ text: 'Reset filters', type: 'secondary', callback: () => {} }],
 *           };
 *         case "loading":
 *           return {
 *             title: 'Loading data',
 *             description: 'Please wait.',
 *           };
 *         default:
 *           return {
 *             title: 'No data available',
 *             description: 'There’s nothing to display yet.',
 *           };
 *       }
 *     }
 *   }
 * }
 * ```
 *
 * ```html
 * <hot-table [settings]="hotSettings"></hot-table>
 * ```
 * :::
 */
export declare class EmptyDataState extends BasePlugin {
    #private;
    /**
     * Returns the plugin key used to identify this plugin in Handsontable settings.
     */
    static get PLUGIN_KEY(): string;
    /**
     * Returns the priority order used to determine the order in which plugins are initialized.
     */
    static get PLUGIN_PRIORITY(): number;
    /**
     * Returns the default settings applied when the plugin is enabled without explicit configuration.
     */
    static get DEFAULT_SETTINGS(): {
        message: string | Record<string, unknown> | undefined;
    };
    /**
     * Returns validator functions for each plugin setting to verify their values are valid before applying them.
     */
    static get SETTINGS_VALIDATORS(): {
        message: (value: unknown) => boolean;
    };
    /**
     * Check if the plugin is enabled in the handsontable settings.
     *
     * @returns {boolean}
     */
    isEnabled(): boolean;
    /**
     * Enable plugin for this Handsontable instance.
     */
    enablePlugin(): void;
    /**
     * Update plugin state after Handsontable settings update.
     */
    updatePlugin(): void;
    /**
     * Disable plugin for this Handsontable instance.
     */
    disablePlugin(): void;
    /**
     * Check if the plugin is currently visible.
     *
     * @returns {boolean}
     */
    isVisible(): boolean;
    /**
     * Destroy plugin instance.
     */
    destroy(): void;
}