import { ICosmographInternalApi } from "../../internal";
type Label = {
    index: number;
    text: string;
    position: [number, number];
    className?: string;
    color?: string;
    weight?: number;
    fontSize?: number;
    style?: string;
    padding?: {
        left: number;
        top: number;
        right: number;
        bottom: number;
    };
    maxWidth?: number;
};
export type CosmographCustomLabel = Omit<Label, 'index'>;
export type LabelMap = Map<number, [string, string, number | undefined]>;
/**
 * Manages the labels for the Cosmograph visualization.
 * This class is responsible for updating, rendering, and handling the display of labels for the points in the Cosmograph.
 */
export declare class Labels {
    private _;
    private _onHoveredLabelClick;
    private _hoveredCssLabel;
    private _cssLabelsRenderer;
    private _focusedLabel;
    private _staticLabelsMap;
    private _dynamicLabelsMap;
    private _selectedLabelsMap;
    private _validLabelAccessor;
    private _validLabelWeightAccessor;
    private _labelDataMap;
    private _customLabelsMap;
    private _sanitizedLabelTextCache;
    private _columnNames;
    private _cachedTrackedPointsPositions;
    private _lastTrackedPointsQueryTime;
    private _cachedSampledPointsPositions;
    private _lastSampledPointsQueryTime;
    private _isZooming;
    private _isManualZooming;
    private _lastSelectedLabelsKey;
    private _lastDynamicLabelsKey;
    private _weightSummary;
    private _clustersFontScale;
    private _clustersWeightScale;
    private _updateClustersFontScaleHandler;
    private _clusterLabelsRefreshFrame;
    private _pointSizeScaleUpdateHandler;
    private _minDegree;
    private _maxDegree;
    private _degreeRange;
    private _degreeSummaryCalculated;
    labelsContainer: HTMLDivElement;
    private get _weightsColumn();
    private _getFontRatio;
    private _resolveLabelStyle;
    private _sanitizeLabelText;
    constructor(_: ICosmographInternalApi, dispatchWheelEventElement: HTMLCanvasElement);
    /**
     * Renders the labels for the Cosmograph visualization.
     */
    render(): Promise<void>;
    /**
     * Updates the labels for the Cosmograph visualization.
     */
    update(): Promise<void>;
    updatePositions(): void;
    private _updateLabels;
    private _updateSelectedPointLabels;
    private _updateDynamicLabels;
    private _updateStaticLabels;
    private _fetchTopLabels;
    private _setLabels;
    private _findTopIndicesByDegree;
    private _populateLabelDataMap;
    private _getTrackedPositions;
    private _getSampledPositions;
    private _hashIndices;
    private _trackPointPositions;
    private _getWeightSummary;
    private _resolveColumnWeight;
    private _addPointLabelsToDataMap;
    private _updateClustersFontScale;
    private _addClusterLabelsToDataMap;
    private _addCustomLabelsToDataMap;
    private _addFocusedLabelToDataMap;
    private _normalizeWeight;
    private _calculateDegreeSummary;
    private _renderLabels;
    /**
     * Renders a hovered label for a point in the Cosmograph visualization.
     */
    renderHoveredLabel(pointIndexBy?: number, pointSpacePosition?: [number, number]): Promise<void>;
    setCustomLabels(labels?: CosmographCustomLabel[]): void;
    /**
     * Set zooming state
     */
    setZooming(isZooming: boolean, isManual?: boolean): void;
    /**
     * Destroys the labels module, removing event listeners and destroying internal components.
     */
    destroy(): void;
    /**
     * Clears the labels data and resets the CSS labels renderer.
     */
    clear(): void;
    private _getLabelColorByIndex;
    private _checkLabelEvents;
    private _hasPointLabelEvents;
    private _hasClusterLabelEvents;
    private _getPaddingObject;
    private _getClusterPadding;
    private _getClusterLabelText;
}
export {};