GanttRepeat (Vue)

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 Vue.

<template> <div class="container-fluid"> <wj-flex-chart :itemsSource="data" chartType="Bar" bindingX="index" plotMargin="auto auto auto 180" :tooltipContent="getTooltipContent"> <wj-flex-chart-series binding="start,end"> </wj-flex-chart-series> <wj-flex-chart-axis wjProperty="axisY" :majorGrid="false" :minorGrid="true" :reversed="true" :itemFormatter="formatter"> </wj-flex-chart-axis> </wj-flex-chart> </div> </template> <script> import '@mescius/wijmo.styles/wijmo.css'; import 'bootstrap.css'; import { createApp } from "vue" import { registerChart } from '@mescius/wijmo.vue2.chart'; import { format } from '@mescius/wijmo'; import { getData } from './data'; let App = { name: "App", data: function () { return { data: getData() } }, methods: { // show task name and duraction in tooltip getTooltipContent(ht) { var str = 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 formatter(engine, label) { for (var i = 0; i < this.data.length; i++) { var item = this.data[i]; if (item.index == label.val) { label.text = item.name; break; } } return label; } } }; const app = createApp(App); // register all components and directives from Wijmo modules registerChart(app) app.mount('#app'); </script> <style> body { margin-bottom: 24pt; } </style>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS 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/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app.vue'); </script> </head> <body> <div id="app"></div> </body> </html>
import { DateTime } from '@mescius/wijmo'; export 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; }
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