import { fabric } from 'fabric';
import { VLMSample, Region } from '../../types';
interface UseRegionLoaderParams {
    canvas: fabric.Canvas | undefined;
    sample: VLMSample | undefined;
    image: fabric.Image | undefined;
    bgImagePosition: {
        left: number;
        top: number;
    };
    canvasInitializedRef: React.MutableRefObject<boolean>;
    bgImagePositionRef: React.MutableRefObject<{
        left: number;
        top: number;
    }>;
    sampleRef: React.MutableRefObject<VLMSample | undefined>;
    labelsLoadedRef: React.MutableRefObject<boolean>;
    rectMapRef: React.MutableRefObject<Map<fabric.Rect, Region>>;
    textLayersMapRef: React.MutableRefObject<Map<fabric.Rect, fabric.Rect[]>>;
    textLayoutContentMapRef: React.MutableRefObject<Map<fabric.Rect, string>>;
    regionNameTextMapRef: React.MutableRefObject<Map<fabric.Rect, fabric.Text>>;
    ocrLoadingIconMapRef: React.MutableRefObject<Map<fabric.Rect, fabric.Group>>;
    imageToCanvasCoords: (imageX: number, imageY: number) => {
        x: number;
        y: number;
    };
    updateRegionShapeAndImage: (rect: fabric.Rect) => void;
    createDeleteControl: () => fabric.Control;
    createOCRControl: () => fabric.Control;
    updateRegionNameText: (rect: fabric.Rect, region: Region) => void;
    updateTextLayers: (rect: fabric.Rect, region: Region) => void;
    setupBoundaryCheck: (rect: fabric.Rect) => (() => void) | undefined;
    cropRegionImage: (region: Region) => Promise<string | undefined>;
    onChange?: (regions: Region[]) => void;
}
/**
 * Hook for loading labels from sample.labels
 * @param params - Region loader configuration parameters
 */
export declare const useRegionLoader: ({ canvas, sample, image, bgImagePosition, canvasInitializedRef, bgImagePositionRef, sampleRef, labelsLoadedRef, rectMapRef, textLayersMapRef, textLayoutContentMapRef, regionNameTextMapRef, ocrLoadingIconMapRef, imageToCanvasCoords, updateRegionShapeAndImage, createDeleteControl, createOCRControl, updateRegionNameText, updateTextLayers, setupBoundaryCheck, cropRegionImage, onChange, }: UseRegionLoaderParams) => void;
export {};