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Selection in JavaScript Gantt control

Selection provides an option to highlight a row or a cell. It can be done using arrow keys or by scrolling down the mouse. To disable selection in the Gantt control, set the allowSelection to false.

To select data, inject the Selection module into the Gantt control.

The Gantt control supports two types of selection that can be set by using the selectionSettings.type property. They are:

  • Single: Sets a single value by default and allows only selection of a single row or a cell.
  • Multiple: Allows you to select multiple rows or cells. To perform the multi-selection, press and hold the CTRL key and click the desired rows or cells.

Selection mode

The Gantt control supports three types of selection modes that can be set by using the selectionSettings.mode. They are:

  • Row: Allows you to select only rows, and the row value is set by default.
  • Cell: Allows you to select only cells.
  • Both: Allows you to select rows and cells at the same time.
Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Both'
    }
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Row selection

The row selection in the Gantt control can be enabled or disabled using the allowSelection property. You can get the selected row object using the getSelectedRecords method. The following code example shows how to disable the row selection in Gantt.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    allowSelection: false
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Row selection is the default type of Gantt selection mode.

Selecting a row on initial load

You can select a row at the time of loading by setting the index of the row to the selectedRowIndex property. Find the following code example for details.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectedRowIndex: 3,
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Selecting a row dynamically

You can also select a row dynamically using the selectRow method. The following code demonstrates how to select a row dynamically by clicking the custom button.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    }
});
gantt.appendTo('#Gantt');

let selectBtn: Button = new Button();
selectBtn.appendTo('#selectRow');

document.getElementById('selectRow').addEventListener('click', () => {
    gantt.selectionModule.selectRow(2); // passing the record index to select the row
});
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
     <button id="selectRow">Select Row</button>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Multiple row selection

You can select multiple rows by setting the selectionSettings.type property to multiple. You can select more than one row by holding down the CTRL key while selecting multiple rows. The following code example explains how to enable multiple selection in Gantt.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Row',
        type: 'Multiple'
    }
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Selecting multiple rows dynamically

You can also select rows dynamically using the selectRows method. The following code demonstrates how to select rows dynamically by clicking the custom button.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Row',
        type: 'Multiple'
    }
});
gantt.appendTo('#Gantt');

let selBtn: Button = new Button();
selBtn.appendTo('#selectRows');

document.getElementById('selectRows').addEventListener('click', () => {
    gantt.selectionModule.selectRows([1, 2, 3]); // passing the record index as array collection
});
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
     <button id="selectRows">Select Rows</button>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Customize row selection action

While selecting a row in Gantt, the rowSelecting and rowSelected events will be triggered. The the rowSelecting event will be triggered on initialization of row selection, and you can get the previously selected row and current selecting row’s information, which is used to prevent selection of a particular row. The rowSelected event will be triggered on completion of row selection action, and you can get the current selected row’s information through this event. The following code example demonstrates how to prevent the selection of a row using the rowSelecting event.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    rowSelecting: function (args: any) {
        if (args.data.TaskID == 4) {
            args.cancel = true;
        }
    },
    selectionSettings: {
        mode: 'Row'
    }
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

In the Gantt control, when you click an already selected row, selection will be cleared. While deselecting a row in Gantt, the rowDeselecting and rowDeselected events will occur. The rowDeselecting event will occur on initialization of deselecting row, and you can get the current deselecting row’s information to prevent the deselection of particular row. The rowDeselected event will occur on completion of row deselection action, and you can get the current deselected row’s information.

Cell selection

You can select a cell in the Gantt control by setting the selectionSettings.mode property to cell. You can get the selected cell information using the getSelectedRowCellIndexes method. This method returns the result as an object collection, which has cellIndexes and rowIndex information of the selected cells.

Find the code example below to enable the cell selection in Gantt.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Cell'
    }
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Selecting multiple cells

You can select multiple cells by setting the selectionSettings.type property to multiple and the selectionSettings.mode property to cell. Multiple cells can be selected by holding the CTRL key and selecting the cells. The following code example demonstrates how to select multiple cells.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Cell',
        type: 'Multiple'
    }
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Selecting a cell dynamically

You can select a cell dynamically using the selectCell method. Refer to the following code example for details.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Cell'
    }
});
gantt.appendTo('#Gantt');

let cellBtn: Button = new Button();
cellBtn.appendTo('#selectCell');

document.getElementById('selectCell').addEventListener('click', () => {
    gantt.selectionModule.selectCell({ cellIndex: 1, rowIndex: 1 });
});
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
     <button id="selectCell">Select Cell</button>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Customize cell selection action

While selecting a cell in Gantt, the cellSelecting and cellSelected event will be triggered. The cellSelecting event will be triggered on initialization of cell selection action, and you can get the current selecting cell information to prevent the selection of a particular cell in a particular row. The cellSelected event will be triggered on completion of cell selection action, and you can get the current selected cell’s information. The following code example demonstrates how to prevent the selection of the cell using the cellSelecting event.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    cellSelecting: function (args: any) {
        if (args.data.TaskID == 4 && args.cellIndex.cellIndex == 1) {
            args.cancel = true;
        }
    },
    selectionSettings: {
        mode: 'Cell'
    }
});
gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Toggle selection

The toggle selection allows you to select and deselect a specific row or cell. To enable toggle selection, set the enableToggle property of the selectionSettings to true. If you click the selected row or cell, then it will be deselected and vice versa. By default, the enableToggle property is set to false.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Row',
        type: 'Multiple',
        enableToggle: true
    }
});
gantt.appendTo('#Gantt');

let toggleBtn: Button = new Button();
toggleBtn.appendTo('#toggle');

document.getElementById('toggle').addEventListener('click', () => {
    gantt.selectionSettings.enableToggle = false;
});
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <button id="toggle">Disable toggle</button>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Clear selection

You can clear the selected cells and selected rows by using a method called clearSelection. The following code example demonstrates how to clear the selected rows in Gantt Chart.

Source
Preview
index.ts
index.html
import { Gantt, Selection } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Selection);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    selectionSettings: {
        mode: 'Row',
        type: 'Multiple'
    }
});
gantt.appendTo('#Gantt');

let selBtn: Button = new Button();
selBtn.appendTo('#selectRows');

let clrBtn: Button = new Button();
clrBtn.appendTo('#clearSelection');

document.getElementById('selectRows').addEventListener('click', () => {
    gantt.selectionModule.selectRows([1, 3, 5]); // passing the record index as array collection
});

document.getElementById('clearSelection').addEventListener('click', () => {
    gantt.clearSelection(); // Clear the selected rows
});
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <button id="selectRows">Select Rows</button>
    <button id="clearSelection">Clear Selection</button>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='Gantt'></div>        
    </div>
</body>

</html>
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