import Konva from 'konva';
import type { CoordinateTransform, LiveEffect, ViewportBounds } from 'mudlet-map-renderer';
import type { SceneHandle } from '../scene';
export declare class LabelHaloEffect implements LiveEffect {
    private readonly sceneRef;
    private selRect?;
    private hoverRect?;
    private previewRect?;
    private handles;
    private layer?;
    private unsubscribe?;
    private strokeWidth;
    private handleSize;
    constructor(sceneRef: {
        current: SceneHandle | null;
    });
    attach(layer: Konva.Layer): void;
    updateViewport(_bounds: ViewportBounds, scale: number, _transform: CoordinateTransform): void;
    syncPositions(): void;
    destroy(): void;
    private getLabelBounds;
    private applyBounds;
    private updateHandles;
    private sync;
}