In the Gantt component, you can change the schedule start and end dates by clicking the custom button programmatically using the updateProjectDates method. You can pass the start and end dates as method arguments to the updateProjectDates method. You can also pass the Boolean value as an additional parameter, which is used to round-off the schedule start and end dates displayed in Gantt timeline.
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';
import { GanttComponent } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
class App extends React.Component {
constructor() {
super(...arguments);
this.taskFields = {
id: 'TaskID',
name: 'TaskName',
startDate: 'StartDate',
duration: 'Duration',
progress: 'Progress',
child: 'subtasks'
};
}
clickHandler() {
this.ganttInstance.updateProjectDates(new Date('01/10/2019'), new Date('06/20/2019'), true);
}
render() {
return (<div>
<ButtonComponent onClick={this.clickHandler.bind(this)}>Update ScheduleDates</ButtonComponent>
<GanttComponent dataSource={data} taskFields={this.taskFields} height='450px' ref={gantt => this.ganttInstance = gantt}>
</GanttComponent></div>);
}
}
;
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/ej2/20.1.57/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%;
}
</style>
</head>
<body>
<div id='root'>
<div id='loader'>Loading....</div>
</div>
</body>
</html>import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';
import { GanttComponent } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
class App extends React.Component<{}, {}>{
private ganttInstance: any;
public taskFields: any = {
id: 'TaskID',
name: 'TaskName',
startDate: 'StartDate',
duration: 'Duration',
progress: 'Progress',
child: 'subtasks'
};
public clickHandler(){
this.ganttInstance.updateProjectDates(new Date('01/10/2019'),new Date('06/20/2019'),true);
}
render() {
return (<div>
<ButtonComponent onClick= { this.clickHandler.bind(this)}>Update ScheduleDates</ButtonComponent>
<GanttComponent dataSource={data} taskFields={this.taskFields}
height = '450px' ref={gantt => this.ganttInstance = gantt}>
</GanttComponent></div>)
}
};
ReactDOM.render(<App />, document.getElementById('root'));