import { Camera, WebGLRenderer } from 'three';
import { Signal } from '@preact/signals-core';
import { AllOptionalProperties, WithReactive } from '../properties/index.js';
import { createRootState, RootProperties } from '../components/root.js';
import { Parent } from './utils.js';
import { FontFamilies } from '../text/index.js';
import { ThreeEventMap } from '../events.js';
export declare class Root<T = {}, EM extends ThreeEventMap = ThreeEventMap> extends Parent<T> {
    protected readonly styleSignal: Signal<RootProperties<EM> | undefined>;
    private readonly propertiesSignal;
    private readonly defaultPropertiesSignal;
    private readonly unsubscribe;
    private readonly onFrameSet;
    private readonly fontFamiliesSignal;
    private readonly pixelSizeSignal;
    internals: ReturnType<typeof createRootState>;
    constructor(camera: Signal<Camera | undefined> | (() => Camera) | Camera, renderer: WebGLRenderer, properties?: RootProperties<EM> & WithReactive<{
        pixelSize?: number;
    }>, defaultProperties?: AllOptionalProperties, fontFamilies?: FontFamilies, requestRender?: () => void, requestFrame?: () => void);
    update(delta: number): void;
    setFontFamilies(fontFamilies: FontFamilies | undefined): void;
    getComputedProperty<K extends keyof RootProperties<EM>>(key: K): RootProperties<EM>[K] | undefined;
    getStyle(): undefined | Readonly<RootProperties<EM>>;
    setStyle(style: RootProperties<EM> | undefined, replace?: boolean): void;
    setProperties(properties: (RootProperties<EM> & WithReactive<{
        pixelSize?: number;
    }>) | undefined): void;
    setDefaultProperties(properties: AllOptionalProperties): void;
    destroy(): void;
}