import NightingaleElement from "@nightingale-elements/nightingale-new-core";
import { NightingaleScrollboxItem } from "./nightingale-scrollbox-item";
export declare class NightingaleScrollbox<TData> extends NightingaleElement {
    /** Amount added to the top and bottom side of the bounding box before the intersection test is performed.
     * Can be a number or CSS length.
     * This lets you adjust the bounds outward so that an item is considered visible even if it is still hidden but is close to the visible area.
     * Negative values will adjust the bound inward so that an item is considered hidden even if it is visible but is close to the edge of the visible area. */
    "root-margin"?: string;
    /** If this attribute is set, wheel scrolling will be disabled whenever Ctrl (or Meta/Command) key is pressed.
     * This helps to prevent bad user experience when some elements in the scrollbox have special Ctrl+Wheel behavior (e.g. zoom) but the gaps between elements still have default scrolling behavior. */
    "disable-scroll-with-ctrl"?: boolean;
    private readonly _items;
    /** Set of currently registered items */
    get items(): ReadonlySet<NightingaleScrollboxItem<TData>>;
    private observer?;
    private readonly callbacks;
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(name: string, oldValue: string | null, newValue: string | null): void;
    private initObserver;
    private disposeObserver;
    private observerCallback;
    /** Add a new scrollbox item and run "onRegister" callback on it. This method is called automatically for all `nightingale-scrollbox-item` elements within the `nightingale-scrollbox` element. */
    register(item: NightingaleScrollboxItem<TData>): {
        unregister: () => void;
    };
    /** Remove a scrollbox item and run "onUnregister" callback on it. Do nothing if the item is not registered. This method is called automatically when a `nightingale-scrollbox-item` element is removed from the `nightingale-scrollbox` element. */
    unregister(item: NightingaleScrollboxItem<TData>): void;
    /** Unregister all items and release resources. */
    dispose(): void;
    /** Set or remove "onRegister" callback function, which will be run on any newly registered items. Also run this callback function on all already registered items. */
    onRegister(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
    /** Set or remove "onEnter" callback function, which will be run on items when they become visible. Also run this callback function on all currently visible items. */
    onEnter(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
    /** Set or remove "onExit" callback function, which will be run on items when they become hidden. Also run this callback function on all currently hidden items. */
    onExit(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
    /** Set or remove "onUnregister" callback function, which will be run on items when they are unregistered. */
    onUnregister(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
    /** Disable or enable scrolling behavior with Ctrl or Meta/Command key pressed. */
    private disableScrollWithCtrl;
}
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