import type { Attachment } from 'svelte/attachments';
import type { FileLoadCallback, TrajectoryFileLoadCallback } from './types';
export type FileDropOptions = {
    allow: () => boolean;
    max_files?: number;
    on_error?: (msg: string) => void;
    set_loading?: (loading: boolean) => void;
} & ({
    hdf5_as_blob?: false;
    on_drop: FileLoadCallback;
} | {
    hdf5_as_blob: true;
    on_drop: TrajectoryFileLoadCallback;
});
export declare const drag_over_handlers: (opts: {
    allow?: () => boolean;
    set_dragover: (over: boolean) => void;
}) => {
    ondragover: (event: DragEvent) => void;
    ondragleave: () => void;
};
export type DropSource = string | File;
export interface DropBatchOptions {
    allow: () => boolean;
    max_files?: number;
    on_error?: (msg: string) => void;
    set_loading?: (loading: boolean) => void;
    handle: (source: DropSource) => Promise<void> | void;
}
export declare const create_drop_batch_handler: (opts: DropBatchOptions) => ((event: DragEvent) => Promise<void>);
export declare const create_file_drop_handler: (opts: FileDropOptions) => ((event: DragEvent) => Promise<void>);
type DragoverOption = {
    on_dragover?: (over: boolean) => void;
};
export declare const file_drop_zone: (options: FileDropOptions & DragoverOption) => Attachment<HTMLElement>;
export declare const raw_file_drop_zone: (options: Omit<DropBatchOptions, `handle`> & DragoverOption & {
    on_drop: (source: DropSource) => Promise<void> | void;
}) => Attachment<HTMLElement>;
export {};