GanttRepeat (React)

Gantt charts illustrate project schedules. They show the start and finish dates of each task and typically add information such as the completion state of each task and dependencies between tasks.

This sample shows how you can use the FlexChart to create a Gantt chart with repeating tasks.

It does this by adding data items with the same (numeric) "X" value.

The Y axis has an itemFormatter that replaces the bound X values (index) with the task names.

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 useEvent from 'react-use-event-hook'; import * as wijmo from '@mescius/wijmo'; import * as wjChart from '@mescius/wijmo.react.chart'; import { data } from './data'; function App() { const chartInitialized = useEvent((sender) => { sender.tooltip.content = getTooltipContent; }); const getTooltipContent = useEvent((ht) => { var str = wijmo.format('<b>{name}</b>:<br/>{start:d} - {end:d}', { name: ht.item.name, start: ht.item.start, end: ht.item.end }); return str; }); // replace item index with item name in Y axis const formatter = useEvent((engine, label) => { for (let i = 0; i < data.length; i++) { let item = data[i]; if (item.index == label.val) { label.text = item.name; break; } } return label; }); return (<div className="container-fluid"> <wjChart.FlexChart itemsSource={data} chartType="Bar" bindingX="index" plotMargin="auto auto auto 180" initialized={chartInitialized}> <wjChart.FlexChartSeries binding="start,end"/> <wjChart.FlexChartAxis wjProperty="axisY" majorGrid={false} minorGrid={true} reversed={true} itemFormatter={formatter}/> </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 Gantt Repeat</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: 24pt; }
import { DateTime } from '@mescius/wijmo'; function getData() { let data = []; let date = new Date(); // add some regular tasks for (let i = 0; i < 3; i++) { let low = i + Math.ceil(Math.random() * 10); let high = low + Math.ceil(Math.random() * 10); data.push({ index: i, name: 'Regular Task ' + (i + 1), start: new Date(date.getTime() + low * 3600 * 24 * 1000), end: new Date(date.getTime() + high * 3600 * 24 * 1000) }); } // add a repeating task (same "index" value) let dt = data[0].start; for (let i = 0; i < 5; i++) { data.push({ index: 3, name: 'First Repeating Task', start: dt, end: DateTime.addDays(dt, 4) }); dt = DateTime.addDays(dt, 7); } // add another repeating task dt = DateTime.addDays(data[0].start, 2); for (let i = 0; i < 5; i++) { data.push({ index: 4, name: 'Second Repeating Task', start: dt, end: DateTime.addDays(dt, 5) }); dt = DateTime.addDays(dt, 7); } // done return data; } export const data = getData();
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 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"npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);