@mui/x-charts
Version:
The community edition of MUI X Charts components.
56 lines • 1.9 kB
JavaScript
import * as React from 'react';
import { interpolateDate, interpolateNumber } from '@mui/x-charts-vendor/d3-interpolate';
import { jsx as _jsx } from "react/jsx-runtime";
const PX_PRECISION = 10;
export default function ChartsContinuousGradient(props) {
const {
gradientUnits,
isReversed,
gradientId,
size,
direction,
scale,
colorScale,
colorMap
} = props;
const extremumValues = [colorMap.min ?? 0, colorMap.max ?? 100];
const extremumPositions = extremumValues.map(scale).filter(p => p !== undefined);
if (extremumPositions.length !== 2) {
return null;
}
const interpolator = typeof extremumValues[0] === 'number' ? interpolateNumber(extremumValues[0], extremumValues[1]) : interpolateDate(extremumValues[0], extremumValues[1]);
const numberOfPoints = Math.round((Math.max(...extremumPositions) - Math.min(...extremumPositions)) / PX_PRECISION);
const keyPrefix = `${extremumValues[0]}-${extremumValues[1]}-`;
return /*#__PURE__*/_jsx("linearGradient", {
id: gradientId,
x1: "0",
x2: "0",
y1: "0",
y2: "0",
[`${direction}${isReversed ? 1 : 2}`]: gradientUnits === 'objectBoundingBox' ? 1 : `${size}px`,
gradientUnits: gradientUnits ?? 'userSpaceOnUse' // Use the SVG coordinate instead of the component ones.
,
children: Array.from({
length: numberOfPoints + 1
}, (_, index) => {
const value = interpolator(index / numberOfPoints);
if (value === undefined) {
return null;
}
const x = scale(value);
if (x === undefined) {
return null;
}
const offset = isReversed ? 1 - x / size : x / size;
const color = colorScale(value);
if (color === null) {
return null;
}
return /*#__PURE__*/_jsx("stop", {
offset: offset,
stopColor: color,
stopOpacity: 1
}, keyPrefix + index);
})
});
}