The Indent and Outdent feature will help to change the hierarchy level of rows in tree grid. The indent action moves the selected row as the last child of its previous row, whereas the outdent action moves the selected row as a sibling to its parent row.
To use the indent and outdent feature, inject the RowDD module in the Tree Grid. The tree grid toolbar has the built-in items to execute indent and outdent actions. Define this by using the toolbar property.
import { TreeGrid, RowDD, Toolbar } from '@syncfusion/ej2-treegrid';
import { sampleData } from './datasource.ts';
TreeGrid.Inject(RowDD, Toolbar);
let treeGridObj: TreeGrid = new TreeGrid({
dataSource: sampleData,
childMapping: 'subtasks',
toolbar: ['Indent', 'Outdent'],
selectedRowIndex: 2,
treeColumnIndex: 1,
columns: [
{ field: 'taskID', headerText: 'Task ID', isPrimaryKey: true, width: 90, textAlign: 'Right'},
{ field: 'taskName', headerText: 'Task Name', width: 180 },
{ field: 'priority', headerText: 'Priority', width: 90 },
{ field: 'duration', headerText: 'Duration', width: 80, textAlign: 'Right' }
],
height: 270
});
treeGridObj.appendTo('#TreeGrid');<!DOCTYPE html>
<html lang="en">
<head>
<title>EJ2 Grid</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Typescript Grid Control" />
<meta name="author" content="Syncfusion" />
<link href="index.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-base/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-grids/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-treegrid/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-buttons/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-popups/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-navigations/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-dropdowns/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-lists/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-inputs/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-calendars/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
<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='TreeGrid'></div>
</div>
</body>
</html>You can change the hierarchy level of record programmatically using indent and outdent methods.
import { TreeGrid, RowDD } from '@syncfusion/ej2-treegrid';
import { sampleData } from './datasource.ts';
TreeGrid.Inject(RowDD);
let treeGridObj: TreeGrid = new TreeGrid({
dataSource: sampleData,
childMapping: 'subtasks',
treeColumnIndex: 1,
columns: [
{ field: 'taskID', headerText: 'Task ID', isPrimaryKey: true, width: 90, textAlign: 'Right'},
{ field: 'taskName', headerText: 'Task Name', width: 180 },
{ field: 'priority', headerText: 'Priority', width: 90 },
{ field: 'duration', headerText: 'Duration', width: 80, textAlign: 'Right' }
],
height: 270
});
treeGridObj.appendTo('#TreeGrid');
document.getElementById('Indenting').addEventListener('click', Indent);
document.getElementById('Outdenting').addEventListener('click', Outdent);
function Indent() {
treeGridObj.indent(treeGridObj.getCurrentViewRecords()[2]);
}
function Outdent() {
treeGridObj.outdent(treeGridObj.getCurrentViewRecords()[2]);
}<!DOCTYPE html>
<html lang="en">
<head>
<title>EJ2 Grid</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Typescript Grid Control" />
<meta name="author" content="Syncfusion" />
<link href="index.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-base/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-grids/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-treegrid/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-buttons/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-popups/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-navigations/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-dropdowns/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-lists/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-inputs/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-calendars/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
<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>
<button id="Indenting">Indent</button>
<button id="Outdenting">Outdent</button>
<div id='container'>
<div id='TreeGrid'></div>
</div>
</body>
</html>