import { Map } from 'ol';
import View from 'ol/View';
import { ESOlViewer } from "../../ESOlViewer";
import { Destroyable, Event as XEvent } from "@u-gis/core";
/**
 * 从 OpenLayers 的视图中提取近似的“相机位置”
 * @param viewer ESOlViewer 实例（需包含 map 和可选高度计算）
 * @param result 可选复用结果数组
 * @returns [lon, lat, height] 相机坐标
 */
export declare function getCameraPosition(viewer: ESOlViewer, result?: [number, number, number]): [number, number, number];
export interface OlViewChangedOptions {
    emitImmediately?: boolean;
    usePostRender?: boolean;
    throttleMs?: number;
    useRaf?: boolean;
}
/**
 * 统一监听 OpenLayers 视图变化（等价 Cesium 的 CzmCameraChanged）
 * - view center / resolution / rotation
 * - map size
 * - （可选）postrender
 * 并转发为一个 changed 事件。
 */
export declare class OlViewChanged extends Destroyable {
    private _map?;
    private _view;
    private _enabled;
    private _keys;
    private _changed;
    private _options;
    private _rafPending;
    private _rafId;
    private _lastEmit;
    constructor(mapOrView: Map | View, options?: OlViewChangedOptions);
    get changed(): XEvent<[]>;
    get enabled(): boolean;
    set enabled(v: boolean);
    /**
     * 若一开始只传了 view，可后续补 map 以监听 change:size/postrender
     */
    attachMap(map: Map): void;
    /** 统一封装绑定&自动加入 dispose */
    private _on;
    private _attach;
    private _detach;
    private _scheduleEmit;
    private _emitWithThrottle;
    private _emit;
}
//# sourceMappingURL=olcameraUtils.d.ts.map