import * as React from "react";
import { IOWidget, Options, Fun } from "./widget";
export interface PromiseOptions<i, o> extends Options {
    on_fail: (reason: any) => o;
    call_promise_when_receive_new_props?: true;
}
export interface PromiseProps<i, o> {
    options: PromiseOptions<i, o>;
    input: i;
    actual_promise: Fun<i, Promise<o>>;
    on_done: (output: o) => void;
}
export interface PromiseState<i, o> {
}
export declare class PromiseComponent<i, o> extends React.Component<PromiseProps<i, o>, PromiseState<i, o>> {
    constructor(props: PromiseProps<i, o>, context: any);
    status?: "running" | "done" | "failed";
    run_promise(i: i): void;
    componentWillReceiveProps(newProps: PromiseProps<i, o>): void;
    componentDidMount(): void;
    render(): null;
}
export declare let promise: <i, o>(p: Fun<i, Promise<o>>, options: PromiseOptions<i, o>) => IOWidget<i, o>;