Critical path in React Gantt component
2 Feb 202312 minutes to read
The critical path in a project is indicated by a single task or a series of tasks. If a task in critical path is delayed, the entire project will be delayed. A task is considered to be critical if any delay to this task would affect the project end date.
The critical path can be enabled in Gantt by using the built-in toolbar button or enableCriticalPath property.
The following code example shows how to display the critical path taskbar in the Gantt control:
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { GanttComponent, Inject, Edit, Toolbar, CriticalPath } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
function App(){
const taskFields = {
id: 'TaskID',
name: 'TaskName',
startDate: 'StartDate',
duration: 'Duration',
progress: 'Progress',
child: 'subtasks'
};
const editOptions = {
allowAdding: true,
allowEditing: true,
allowDeleting: true,
allowTaskbarEditing: true,
showDeleteConfirmDialog: true
};
const toolbarOptions = ['CriticalPath'];
return <GanttComponent dataSource={data} taskFields={taskFields} enableCriticalPath={true}
editSettings={editOptions} toolbar={toolbarOptions} height = '450px'>
<Inject services={[Edit, CriticalPath, Toolbar]} />
</GanttComponent>
};
ReactDOM.render(<App />, document.getElementById('root'));import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { GanttComponent, Inject, Edit, EditSettingsModel, Toolbar, ToolbarItem, CriticalPath } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
function App(){
const taskFields: any = {
id: 'TaskID',
name: 'TaskName',
startDate: 'StartDate',
duration: 'Duration',
progress: 'Progress',
child: 'subtasks'
};
const editOptions: EditSettingsModel = {
allowAdding: true,
allowEditing: true,
allowDeleting: true,
allowTaskbarEditing: true,
showDeleteConfirmDialog: true
};
const toolbarOptions: ToolbarItem[] = ['CriticalPath'];
return <GanttComponent dataSource={data} taskFields={taskFields} enableCriticalPath={true}
editSettings={editOptions} toolbar={toolbarOptions} height = '450px'>
<Inject services={[Edit, CriticalPath, Toolbar]} />
</GanttComponent>
};
ReactDOM.render(<App />, document.getElementById('root'));<!DOCTYPE html>
<html lang="en">
<head>
<title>Syncfusion React Gantt</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 for React Components" />
<meta name="author" content="Syncfusion" />
<link href="https://cdn.syncfusion.com/ej2/28.1.33/material.css" rel="stylesheet" type="text/css"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
<style>
#loader {
color: #008cff;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
.e-gantt .e-gantt-chart .e-custom-holiday {
background-color:lightgreen;
}
</style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id='root'>
<div id='loader'>Loading....</div>
</div>
</body>
</html>Customize taskbar in critical path
The taskbar in critical path can be customized by using queryTaskbarInfo event and isCritical property of row data in the event argument.
The following code example shows how to customize the critical path taskbar in the Gantt control:
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { GanttComponent, Inject, Edit, Toolbar, CriticalPath } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
function App(){
const taskFields = {
id: 'TaskID',
name: 'TaskName',
startDate: 'StartDate',
duration: 'Duration',
progress: 'Progress',
child: 'subtasks'
};
const editOptions = {
allowAdding: true,
allowEditing: true,
allowDeleting: true,
allowTaskbarEditing: true,
showDeleteConfirmDialog: true
};
function queryTaskbarInfo(args) {
if ((args.data.isCritical || args.data.slack === '0 day') && !args.data.hasChildRecords) {
args.taskbarBgColor = 'rgb(242, 210, 189)';
args.progressBarBgColor = 'rgb(201, 169, 166)';
}
}
const toolbarOptions = ['CriticalPath'];
return <GanttComponent dataSource={data} taskFields={taskFields} height = '450px' queryTaskbarInfo={queryTaskbarInfo} enableCriticalPath={true}
editSettings={editOptions} toolbar={toolbarOptions}>
<Inject services={[Edit, CriticalPath, Toolbar]} />
</GanttComponent>
};
ReactDOM.render(<App />, document.getElementById('root'));import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { GanttComponent, Inject, Edit, EditSettingsModel, Toolbar, ToolbarItem, CriticalPath } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
function App(){
const taskFields: any = {
id: 'TaskID',
name: 'TaskName',
startDate: 'StartDate',
duration: 'Duration',
progress: 'Progress',
child: 'subtasks'
};
const editOptions: EditSettingsModel = {
allowAdding: true,
allowEditing: true,
allowDeleting: true,
allowTaskbarEditing: true,
showDeleteConfirmDialog: true
};
function queryTaskbarInfo(args: any): void {
if ((args.data.isCritical || args.data.slack === '0 day') && !args.data.hasChildRecords) {
args.taskbarBgColor = 'rgb(242, 210, 189)';
args.progressBarBgColor = 'rgb(201, 169, 166)';
}
}
const toolbarOptions: ToolbarItem[] = ['CriticalPath'];
return <GanttComponent dataSource={data} taskFields={taskFields} height = '450px' queryTaskbarInfo={queryTaskbarInfo} enableCriticalPath={true}
editSettings={editOptions} toolbar={toolbarOptions}>
<Inject services={[Edit, CriticalPath, Toolbar]} />
</GanttComponent>
};
ReactDOM.render(<App />, document.getElementById('root'));<!DOCTYPE html>
<html lang="en">
<head>
<title>Syncfusion React Gantt</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 for React Components" />
<meta name="author" content="Syncfusion" />
<link href="https://cdn.syncfusion.com/ej2/28.1.33/material.css" rel="stylesheet" type="text/css"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
<style>
#loader {
color: #008cff;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
.e-gantt .e-gantt-chart .e-custom-holiday {
background-color:lightgreen;
}
</style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id='root'>
<div id='loader'>Loading....</div>
</div>
</body>
</html>