import Konva from 'konva';
import type { CoordinateTransform, LiveEffect, ViewportBounds } from 'mudlet-map-renderer';
import type { SceneHandle } from '../scene';
export declare class SelectionCenterEffect implements LiveEffect {
    private readonly sceneRef;
    private hLine?;
    private vLine?;
    private dot?;
    private layer?;
    private unsubscribe?;
    constructor(sceneRef: {
        current: SceneHandle | null;
    });
    attach(layer: Konva.Layer): void;
    updateViewport(_bounds: ViewportBounds, scale: number, _transform: CoordinateTransform): void;
    syncPositions(): void;
    destroy(): void;
    private sync;
}