import Konva from 'konva';
import type { CoordinateTransform, LiveEffect, ViewportBounds } from 'mudlet-map-renderer';
/**
 * Fallback grid drawn on the LiveEffect layer for empty area/z levels where the
 * renderer's own GridRenderer never fires (it returns early when there's no plane).
 * Matches the renderer's grid color, line width, and cell size exactly.
 * Draws subtle x=0 and y=0 axis lines plus a fixed-size (0,0) label at the origin.
 */
export declare class GridOverlayEffect implements LiveEffect {
    private readonly gridColor;
    private readonly gridLineWidth;
    private readonly gridSize;
    private readonly getIsEmpty;
    private readonly getViewportBounds;
    private gridShape?;
    private axisShape?;
    private labelShape?;
    private layer?;
    private bounds;
    private scale;
    private unsubscribe?;
    constructor(gridColor: string, gridLineWidth: number, gridSize: number, getIsEmpty: () => boolean, getViewportBounds: () => ViewportBounds);
    attach(layer: Konva.Layer): void;
    updateViewport(bounds: ViewportBounds, scale: number, _transform: CoordinateTransform): void;
    destroy(): void;
    syncVisibility(): void;
}