recharts/types/hooks.d.ts

React charts

import { AxisId } from './state/cartesianAxisSlice';
import { BaseAxisWithScale } from './state/selectors/axisSelectors';
import { ChartOffset, PlotArea } from './types';
import { CategoricalDomain, Coordinate, NumberDomain } from './util/types';
import { ActiveLabel } from './synchronisation/types';
export declare const useXAxis: (xAxisId: AxisId) => BaseAxisWithScale | undefined;
export declare const useYAxis: (yAxisId: AxisId) => BaseAxisWithScale | undefined;
/**
 * Returns the active tooltip label. The label is one of the values from the chart data,
 * and is used to display in the tooltip content.
 *
 * Returns undefined if there is no active user interaction or if used outside a chart context
 *
 * @returns ActiveLabel
 */
export declare const useActiveTooltipLabel: () => ActiveLabel;
/**
 * Returns the offset of the chart in pixels.
 *
 * Offset defines the blank space between the chart and the plot area.
 * This blank space is occupied by supporting elements like axes, legends, and brushes.
 *
 * The offset includes:
 *
 * - Margins
 * - Width and height of the axes
 * - Width and height of the legend
 * - Brush height
 *
 * If you are interested in the margin alone, use {@link useMargin} instead.
 *
 * The offset is independent of charts position on the page, meaning it does not change as the chart is scrolled or resized.
 *
 * It is also independent of the scale and zoom, meaning that as the user zooms in and out,
 * the numbers will not change as the chart gets visually larger or smaller.
 *
 * This hook must be used within a chart context (inside a `<LineChart>`, `<BarChart>`, etc.).
 * This hook returns `undefined` if used outside a chart context.
 *
 * @returns Offset of the chart in pixels, or undefined if used outside a chart context.
 */
export declare const useOffset: () => ChartOffset | undefined;
/**
 * Plot area is the area where the actual chart data is rendered.
 * This means: bars, lines, scatter points, etc.
 *
 * The plot area is calculated based on the chart dimensions and the offset.
 *
 * Plot area `width` and `height` are the dimensions in pixels;
 * `x` and `y` are the coordinates of the top-left corner of the plot area relative to the chart container.
 *
 * They are also independent of the scale and zoom, meaning that as the user zooms in and out,
 * the plot area dimensions will not change as the chart gets visually larger or smaller.
 *
 * This hook must be used within a chart context (inside a `<LineChart>`, `<BarChart>`, etc.).
 * This hook returns `undefined` if used outside a chart context.
 *
 * @returns Plot area of the chart in pixels, or undefined if used outside a chart context.
 */
export declare const usePlotArea: () => PlotArea | undefined;
/**
 * Returns the currently active data points being displayed in the Tooltip.
 * Active means that it is currently visible; this hook will return `undefined` if there is no current interaction.
 *
 * This follows the `<Tooltip />` props, if the Tooltip element is present in the chart.
 * If there is no `<Tooltip />` then this hook will follow the default Tooltip props.
 *
 * Data point is whatever you pass as an input to the chart using the `data={}` prop.
 *
 * This returns an array because a chart can have multiple graphical items in it (multiple Lines for example)
 * and tooltip with `shared={true}` will display all items at the same time.
 *
 * Returns undefined when used outside a chart context.
 *
 * @returns Data points that are currently visible in a Tooltip
 */
export declare const useActiveTooltipDataPoints: <T = unknown>() => ReadonlyArray<T> | undefined;
/**
 * Returns the calculated domain of an X-axis.
 *
 * The domain can be numerical: `[min, max]`, or categorical: `['a', 'b', 'c']`.
 *
 * The type of the domain is defined by the `type` prop of the XAxis.
 *
 * The values of the domain are calculated based on the data and the `dataKey` of the axis.
 *
 * If the chart has a Brush, the domain will be filtered to the brushed indexes if the hook is used outside a Brush context,
 * and the full domain will be returned if the hook is used inside a Brush context.
 *
 * @param xAxisId The `xAxisId` of the X-axis. Defaults to `0` if not provided.
 * @returns The domain of the X-axis, or `undefined` if it cannot be calculated or if used outside a chart context.
 */
export declare const useXAxisDomain: (xAxisId?: AxisId) => NumberDomain | CategoricalDomain | undefined;
/**
 * Returns the calculated domain of a Y-axis.
 *
 * The domain can be numerical: `[min, max]`, or categorical: `['a', 'b', 'c']`.
 *
 * The type of the domain is defined by the `type` prop of the YAxis.
 *
 * The values of the domain are calculated based on the data and the `dataKey` of the axis.
 *
 * Does not interact with Brushes, as Y-axes do not support brushing.
 *
 * @param yAxisId The `yAxisId` of the Y-axis. Defaults to `0` if not provided.
 * @returns The domain of the Y-axis, or `undefined` if it cannot be calculated or if used outside a chart context.
 */
export declare const useYAxisDomain: (yAxisId?: AxisId) => NumberDomain | CategoricalDomain | undefined;
/**
 * Returns true if the {@link Tooltip} is currently active (visible).
 *
 * Returns false if the Tooltip is not active or if used outside a chart context.
 *
 * Recharts only allows one Tooltip per chart, so this hook does not take any parameters.
 * Weird things may happen if you have multiple Tooltip components in the same chart so please don't do that.
 *
 * @returns {boolean} True if the Tooltip is active, false otherwise.
 * @since 3.7
 */
export declare const useIsTooltipActive: () => boolean;
/**
 * Returns the Cartesian `x` + `y` coordinates of the active {@link Tooltip}.
 *
 * Returns undefined if there is no active user interaction or if used outside a chart context.
 *
 * Recharts only allows one Tooltip per chart, so this hook does not take any parameters.
 * Weird things may happen if you have multiple Tooltip components in the same chart so please don't do that.
 *
 * @returns {Coordinate | undefined} The coordinate of the active Tooltip, or undefined.
 * @since 3.7
 */
export declare const useActiveTooltipCoordinate: () => Coordinate | undefined;