Custom Column Series (React)

This sample shows custom column series for the FlexChart. It allows to set custom offset and width for the columns.

Learn about FlexChart | FlexChart API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React from 'react'; import * as wjChart from '@mescius/wijmo.react.chart'; import * as wjChartAnimate from '@mescius/wijmo.react.chart.animation'; import { Position, Axis } from '@mescius/wijmo.chart'; import { ColumnSeries } from './ColumnSeries'; import { data, palette } from './data'; function App() { function initialized(chart, args) { let axisY2 = new Axis(Position.Right); axisY2.min = 0; axisY2.title = 'Precipitation (inch)'; chart.series.push(new ColumnSeries({ binding: 't', name: 'Mean Temperature', width: 1, offset: 0.5 })); chart.series.push(new ColumnSeries({ binding: 't2023', name: '2023 Temperature', width: 0.6, offset: -0.3 })); chart.series.push(new ColumnSeries({ axisY: axisY2, binding: 'p', name: 'Mean Precipitation', width: 1, offset: 0.5 })); chart.series.push(new ColumnSeries({ axisY: axisY2, binding: 'p2023', name: '2023 Precipitation', width: 0.6, offset: -0.3 })); } return (<div className="container-fluid"> <wjChart.FlexChart chartType="Column" bindingX="name" header='Average Climate Chart' itemsSource={data} palette={palette} initialized={initialized}> <wjChart.FlexChartLegend position="Bottom"/> <wjChart.FlexChartAxis wjProperty="axisY" title="Temperature (°F)"/> <wjChartAnimate.FlexChartAnimation /> </wjChart.FlexChart> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo FlexChart Column With Axis Range</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
body { margin-bottom: 24px; }
// list of country GDP https://en.wikipedia.org/wiki/List_of_IMF_ranked_countries_by_GDP export const data = [ { name: 'New York', t: 55.8, t2023: 57.9, p: 49.2, p2023: 59.29 }, { name: 'San Francisco', t: 57.7, t2023: 58.1, p: 22.89, p2023: 21.27 } ]; export const palette = ['rgb(253, 191, 111)', 'rgb(255, 127, 0)', 'rgb(166, 206, 227)', 'rgb(31, 120, 180)'];
import { asNumber } from "@mescius/wijmo"; import { Series, ChartType, } from "@mescius/wijmo.chart"; /** * Column series with extended customization options. */ export class ColumnSeries extends Series { constructor(options) { super(); this._width = 1; this._offset = 0; this._chartType = ChartType.Column; this.rendered.addHandler(this._rendered, this); this.initialize(options); } /** * Gets or sets the relative column offset from the original position. * Default value is 0. */ get offset() { return this._offset; } set offset(value) { if (value != this._offset) { this._offset = asNumber(value, true); this._invalidate(); } } /** * Gets or sets the relative column width comparing with the original width. * Default value is 1, the width is the same as original. */ get width() { return this._width; } set width(value) { if (value != this._width && value >= 0) { this._width = asNumber(value, true); this._invalidate(); } } _rendered(sender, args) { const len = this._getLength(); const si = this.__chart.series.indexOf(this); const map = this._plotter.hitTester._map[si]; for (let i = 0; i < len; i++) { const rect = this.getPlotElement(i); if (rect && rect.nodeName === "rect") { // change offset if (this.offset != 0) { let x = +rect.getAttribute("x"); let w = +rect.getAttribute("width"); rect.setAttribute("x", (x + w * this.offset).toString()); } // change width if (this.width !== 1) { let w = +rect.getAttribute("width"); rect.setAttribute("width", (w * this.width).toString()); } // update hit test data let area = map[i]; if (area && area.rect) { area.rect.left = +rect.getAttribute("x"); area.rect.width = +rect.getAttribute("width"); } } } } }
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