247 lines
8.1 KiB
JavaScript
247 lines
8.1 KiB
JavaScript
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/* *
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*
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* (c) 2010-2020 Torstein Honsi
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*
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* License: www.highcharts.com/license
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*
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* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
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*
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* */
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'use strict';
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import U from './Utilities.js';
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var pick = U.pick, seriesType = U.seriesType;
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import './Options.js';
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import './Series.js';
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/**
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* Spline series type.
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*
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* @private
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* @class
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* @name Highcharts.seriesTypes.spline
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*
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* @augments Highcarts.Series
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*/
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seriesType('spline', 'line',
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/**
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* A spline series is a special type of line series, where the segments
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* between the data points are smoothed.
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*
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* @sample {highcharts} highcharts/demo/spline-irregular-time/
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* Spline chart
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* @sample {highstock} stock/demo/spline/
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* Spline chart
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*
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* @extends plotOptions.series
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* @excluding step
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* @product highcharts highstock
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* @optionparent plotOptions.spline
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*/
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{},
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/**
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* @lends seriesTypes.spline.prototype
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*/
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{
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/* eslint-disable valid-jsdoc */
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/**
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* Get the spline segment from a given point's previous neighbour to the
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* given point.
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*
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* @private
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* @function Highcharts.seriesTypes.spline#getPointSpline
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*
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* @param {Array<Highcharts.Point>}
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*
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* @param {Highcharts.Point} point
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*
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* @param {number} i
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*
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* @return {Highcharts.SVGPathArray}
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*/
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getPointSpline: function (points, point, i) {
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var
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// 1 means control points midway between points, 2 means 1/3
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// from the point, 3 is 1/4 etc
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smoothing = 1.5, denom = smoothing + 1, plotX = point.plotX || 0, plotY = point.plotY || 0, lastPoint = points[i - 1], nextPoint = points[i + 1], leftContX, leftContY, rightContX, rightContY, ret;
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/**
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* @private
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*/
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function doCurve(otherPoint) {
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return otherPoint &&
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!otherPoint.isNull &&
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otherPoint.doCurve !== false &&
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// #6387, area splines next to null:
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!point.isCliff;
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}
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// Find control points
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if (doCurve(lastPoint) && doCurve(nextPoint)) {
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var lastX = lastPoint.plotX || 0, lastY = lastPoint.plotY || 0, nextX = nextPoint.plotX || 0, nextY = nextPoint.plotY || 0, correction = 0;
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leftContX = (smoothing * plotX + lastX) / denom;
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leftContY = (smoothing * plotY + lastY) / denom;
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rightContX = (smoothing * plotX + nextX) / denom;
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rightContY = (smoothing * plotY + nextY) / denom;
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// Have the two control points make a straight line through main
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// point
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if (rightContX !== leftContX) { // #5016, division by zero
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correction = (((rightContY - leftContY) *
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(rightContX - plotX)) /
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(rightContX - leftContX) + plotY - rightContY);
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}
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leftContY += correction;
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rightContY += correction;
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// to prevent false extremes, check that control points are
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// between neighbouring points' y values
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if (leftContY > lastY && leftContY > plotY) {
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leftContY = Math.max(lastY, plotY);
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// mirror of left control point
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rightContY = 2 * plotY - leftContY;
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}
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else if (leftContY < lastY && leftContY < plotY) {
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leftContY = Math.min(lastY, plotY);
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rightContY = 2 * plotY - leftContY;
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}
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if (rightContY > nextY && rightContY > plotY) {
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rightContY = Math.max(nextY, plotY);
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leftContY = 2 * plotY - rightContY;
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}
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else if (rightContY < nextY && rightContY < plotY) {
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rightContY = Math.min(nextY, plotY);
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leftContY = 2 * plotY - rightContY;
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}
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// record for drawing in next point
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point.rightContX = rightContX;
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point.rightContY = rightContY;
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}
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// Visualize control points for debugging
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/*
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if (leftContX) {
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this.chart.renderer.circle(
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leftContX + this.chart.plotLeft,
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leftContY + this.chart.plotTop,
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2
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)
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.attr({
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stroke: 'red',
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'stroke-width': 2,
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fill: 'none',
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zIndex: 9
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})
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.add();
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this.chart.renderer.path(['M', leftContX + this.chart.plotLeft,
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leftContY + this.chart.plotTop,
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'L', plotX + this.chart.plotLeft, plotY + this.chart.plotTop])
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.attr({
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stroke: 'red',
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'stroke-width': 2,
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zIndex: 9
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})
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.add();
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}
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if (rightContX) {
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this.chart.renderer.circle(
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rightContX + this.chart.plotLeft,
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rightContY + this.chart.plotTop,
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2
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)
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.attr({
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stroke: 'green',
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'stroke-width': 2,
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fill: 'none',
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zIndex: 9
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})
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.add();
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this.chart.renderer.path(['M', rightContX + this.chart.plotLeft,
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rightContY + this.chart.plotTop,
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'L', plotX + this.chart.plotLeft, plotY + this.chart.plotTop])
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.attr({
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stroke: 'green',
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'stroke-width': 2,
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zIndex: 9
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})
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.add();
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}
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// */
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ret = [
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'C',
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pick(lastPoint.rightContX, lastPoint.plotX, 0),
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pick(lastPoint.rightContY, lastPoint.plotY, 0),
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pick(leftContX, plotX, 0),
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pick(leftContY, plotY, 0),
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plotX,
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plotY
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];
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// reset for updating series later
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lastPoint.rightContX = lastPoint.rightContY = void 0;
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return ret;
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}
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/* eslint-enable valid-jsdoc */
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});
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/**
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* A `spline` series. If the [type](#series.spline.type) option is
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* not specified, it is inherited from [chart.type](#chart.type).
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*
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* @extends series,plotOptions.spline
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* @excluding dataParser, dataURL, step
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* @product highcharts highstock
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* @apioption series.spline
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*/
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/**
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* An array of data points for the series. For the `spline` series type,
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* points can be given in the following ways:
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*
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* 1. An array of numerical values. In this case, the numerical values will be
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* interpreted as `y` options. The `x` values will be automatically
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* calculated, either starting at 0 and incremented by 1, or from
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* `pointStart` and `pointInterval` given in the series options. If the axis
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* has categories, these will be used. Example:
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* ```js
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* data: [0, 5, 3, 5]
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* ```
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*
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* 2. An array of arrays with 2 values. In this case, the values correspond to
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* `x,y`. If the first value is a string, it is applied as the name of the
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* point, and the `x` value is inferred.
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* ```js
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* data: [
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* [0, 9],
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* [1, 2],
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* [2, 8]
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* ]
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* ```
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*
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* 3. An array of objects with named values. The following snippet shows only a
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* few settings, see the complete options set below. If the total number of
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* data points exceeds the series'
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* [turboThreshold](#series.spline.turboThreshold),
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* this option is not available.
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* ```js
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* data: [{
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* x: 1,
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* y: 9,
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* name: "Point2",
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* color: "#00FF00"
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* }, {
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* x: 1,
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* y: 0,
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* name: "Point1",
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* color: "#FF00FF"
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* }]
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* ```
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*
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* @sample {highcharts} highcharts/chart/reflow-true/
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* Numerical values
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* @sample {highcharts} highcharts/series/data-array-of-arrays/
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* Arrays of numeric x and y
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* @sample {highcharts} highcharts/series/data-array-of-arrays-datetime/
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* Arrays of datetime x and y
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* @sample {highcharts} highcharts/series/data-array-of-name-value/
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* Arrays of point.name and y
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* @sample {highcharts} highcharts/series/data-array-of-objects/
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* Config objects
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*
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* @type {Array<number|Array<(number|string),(number|null)>|null|*>}
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* @extends series.line.data
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* @product highcharts highstock
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* @apioption series.spline.data
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*/
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''; // adds doclets above intro transpilat
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