import Konva from 'konva';
import type { CoordinateTransform, LiveEffect, ViewportBounds } from 'mudlet-map-renderer';
/** Room silhouette preview at the snapped cell — used for Add Room. */
export declare class SnapIndicatorEffect implements LiveEffect {
    private readonly settings;
    private rect?;
    private layer?;
    private unsubscribe?;
    constructor(settings: {
        roomSize: number;
    });
    attach(layer: Konva.Layer): void;
    updateViewport(_bounds: ViewportBounds, scale: number, _transform: CoordinateTransform): void;
    syncPositions(): void;
    destroy(): void;
    private sync;
}