import { HistogramParams } from '../../histograms/HistogramParams.js';
import { ChartAxes, ChartDimensions, HistogramData, HistogramSVGG, SwimlaneAxes } from '../utils/HistogramUtils.js';
export interface XBucket {
    start: number;
    end: number;
}
/**
 * A bucket that represents one data entry in the histogram.
 * This bucket is not shown graphically but will be appended to a virtual context
 * in order to listen to mouse events.
 */
export declare class Bucket {
    /** Inputs. */
    private data;
    private histogramParams;
    private rootContext;
    private dimensions;
    private axes;
    /** Calculated state. */
    private hovered;
    private context;
    /** This context is virtual. Buckets are not plotted on the histogram. */
    private virtual;
    constructor(data: HistogramData, histogramParams: HistogramParams, rootContext: HistogramSVGG, dimensions: ChartDimensions, axes: ChartAxes | SwimlaneAxes);
    /**
     * Transforms the x value to number and returns it.
     * @returns the bucket's x value as number
     */
    getBucktXValue(): number;
    /**
     * Plot the buckets on the histogram root context.
     * USE FOR DEBUG PURPOSES ONLY.
     */
    plot(): void;
    /** Hovers the bucket and notifies the hoveredBucket event that the bucket has been hovered.
     * However, this notification is sent once. If the bucket remains hovered, no more notifications are sent.
    */
    hover(): void;
    /**
     * Leaves the bucket and notifies the hoveredBucket event that the bucket has been left :'(.
     * However, this notification is sent once. If the bucket has been already left, no more notifications are sent.
     */
    leave(): void;
    /**
     * Notifies that the bucket has been hovered.
     */
    notifyHover(): void;
    /**
     * Notifies that the bucket has been left.
     */
    notifyLeave(): void;
}
/**
 * A Virtual context (in D3 lingo), where no svg elements are drawn. It is used to declare all the buckets that compose
 * the histogram.
 * The main objective of this context is to detect which bucket is hovered and to notify the histogram.
 */
export declare class BucketsVirtualContext {
    private buckets;
    private bucketsMap;
    /**
     * Add the bucket to the context.
     * @param b A bucket that represents one data entry.
     */
    append(b: Bucket): void;
    /**
     * - Notifies the histogram when hovering a bucket that was not hovered before.
     * - Notifies the histogram when leaving a bucket that is not hovered anymore.
     * @param hoveredKey List of current hovered bucket's keys.
     */
    interact(hoveredKey: (string | number)[]): void;
    /**
     * Leaves all the given keys
     */
    leaveAll(leftKeys: (string | number)[]): void;
}