/*!
 * Copyright 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */
import { ExtendedHTMLElement } from '../../helper/dom';
export interface BaseDropdownProps<T> {
    description?: string;
    descriptionLink?: {
        id: string;
        text: string;
        destination: string;
        onClick?: () => void;
    };
    items: T[];
    onChange?: (selectedItems: T[]) => void;
    tabId?: string;
    messageId?: string;
    classNames?: string[];
}
export declare abstract class BaseDropdown<T = any> {
    render: ExtendedHTMLElement;
    protected readonly props: BaseDropdownProps<T>;
    protected readonly tabId: string;
    protected readonly messageId: string;
    protected dropdownContent: ExtendedHTMLElement | null;
    protected dropdownPortal: ExtendedHTMLElement | null;
    protected readonly uid: string;
    protected isOpen: boolean;
    protected selectedItems: T[];
    protected dropdownIcon: ExtendedHTMLElement;
    protected readonly sheetOpenListenerId: string | null;
    protected abstract createItemElement(item: T): ExtendedHTMLElement;
    protected abstract handleItemSelection(item: T): void;
    protected abstract getItemSelectionState(item: T): boolean;
    protected abstract getDisplayLabel(): string;
    protected getCSSVariableValue(variableName: string, fallback: number): number;
    constructor(props: BaseDropdownProps<T>);
    protected getInitialSelection(): T[];
    protected readonly updateUI: () => void;
    protected abstract getItemId(item: T): string;
    protected readonly onLinkClick: (buttonId: string) => void;
    protected readonly toggleDropdown: (e: Event) => void;
    protected readonly openDropdown: () => void;
    protected readonly isElementVisible: (element: Element) => boolean;
    protected readonly updateDropdownPosition: () => void;
    protected readonly closeDropdown: () => void;
    protected readonly handleClickOutside: (e: MouseEvent) => void;
    readonly getSelectedItems: () => T[];
    readonly setSelectedItems: (itemIds: string[]) => void;
    protected readonly dispatchChangeEvent: () => void;
    readonly destroy: () => void;
}