import { Source, Push } from "lazy-space";
export declare abstract class CallbackSource<T> implements Source<T> {
    protected readonly subscriptions: Set<Push<T>>;
    constructor(subscriptions?: Set<Push<T>>);
    subscribe(p: Push<T>): void;
    protected push(output: T): void;
}
export declare class PromiseSource<T> extends CallbackSource<T> {
    constructor();
    registerPromise(promise: Promise<T>): void;
}
export declare type KeyboardEventType = "keydown" | "keypress" | "keyup";
export declare class KeyboardEventSource extends CallbackSource<KeyboardEvent> {
    constructor(...types: KeyboardEventType[]);
}
export declare type MouseEventType = "click" | "dblclick" | "mousedown" | "mouseup" | "mouseover" | "mouseout" | "mousemove";
export declare class MouseEventSource extends CallbackSource<MouseEvent> {
    constructor(...types: MouseEventType[]);
}
export declare type TouchEventType = "touchstart" | "touchend" | "touchmove" | "touchcancel";
export declare class TouchEventSource extends CallbackSource<TouchEvent> {
    constructor(...types: TouchEventType[]);
}