101 lines
2.1 KiB
JavaScript
101 lines
2.1 KiB
JavaScript
const commonTooltips = () => ({
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mode: 'x',
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intersect: false,
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});
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const adjustedFontScale = () => ({
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fontSize: 8,
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});
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const yAxesConfig = (shouldAdjustFontSize = false) => ({
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yAxes: [
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{
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ticks: {
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beginAtZero: true,
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...(shouldAdjustFontSize ? adjustedFontScale() : {}),
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},
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},
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],
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});
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const xAxesConfig = (shouldAdjustFontSize = false) => ({
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xAxes: [
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{
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ticks: {
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...(shouldAdjustFontSize ? adjustedFontScale() : {}),
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},
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},
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],
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});
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const commonChartOptions = () => ({
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responsive: true,
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maintainAspectRatio: false,
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legend: false,
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});
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export const barChartOptions = (shouldAdjustFontSize) => ({
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...commonChartOptions(),
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scales: {
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...yAxesConfig(shouldAdjustFontSize),
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...xAxesConfig(shouldAdjustFontSize),
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},
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tooltips: {
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...commonTooltips(),
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displayColors: false,
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callbacks: {
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title() {
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return '';
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},
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label({ xLabel, yLabel }) {
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return `${xLabel}: ${yLabel}`;
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},
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},
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},
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});
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export const pieChartOptions = commonChartOptions;
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export const lineChartOptions = ({ width, numberOfPoints, shouldAdjustFontSize }) => ({
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...commonChartOptions(),
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scales: {
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...yAxesConfig(shouldAdjustFontSize),
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...xAxesConfig(shouldAdjustFontSize),
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},
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elements: {
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point: {
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hitRadius: width / (numberOfPoints * 2),
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},
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},
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tooltips: {
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...commonTooltips(),
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caretSize: 0,
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multiKeyBackground: 'rgba(0,0,0,0)',
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callbacks: {
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labelColor({ datasetIndex }, { config }) {
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return {
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backgroundColor: config.data.datasets[datasetIndex].backgroundColor,
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borderColor: 'rgba(0,0,0,0)',
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};
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},
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},
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},
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});
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/**
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* Takes a dataset and returns an array containing the y-values of it's first and last entry.
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* (e.g., [['xValue1', 'yValue1'], ['xValue2', 'yValue2'], ['xValue3', 'yValue3']] will yield ['yValue1', 'yValue3'])
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*
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* @param {Array} data
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* @returns {[*, *]}
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*/
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export const firstAndLastY = (data) => {
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const [firstEntry] = data;
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const [lastEntry] = data.slice(-1);
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const firstY = firstEntry[1];
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const lastY = lastEntry[1];
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return [firstY, lastY];
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};
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