Drag and drop in EJ2 TypeScript Gantt control

4 May 20237 minutes to read

In Gantt, it is possible to drag a record from another component and drop it in Gantt chart with updating the Gantt record. Here, dragging an item from TreeView component to Gantt and that item is updated as a resource for the Gantt record, we can achieve this, by using nodeDragStop event of TreeView control.

index.ts
index.html
import { Gantt, Edit, Selection } from '@syncfusion/ej2-gantt';
import { TreeView, DragAndDropEventArgs } from '@syncfusion/ej2-navigations';
import { editingData, editingResources } from 'datasource.ts';
import { closest } from '@syncfusion/ej2-base';

Gantt.Inject(Edit, Selection);

let treeObj: TreeView = new TreeView({
    fields: { dataSource: editingResources, id: 'resourceId', text: 'resourceName' },
    allowDragAndDrop: true,
    height: "200px",
    nodeDragStop: function (args: DragAndDropEventArgs): void {
        let ganttObj: any = document.getElementById('Gantt').ej2_instances[0];
        let chartEle: any = closest(args.target, '.e-chart-row');
        let gridEle: any = closest(args.target, '.e-row');
        if(gridEle){
          var index = ganttObj.treeGrid.getRows().indexOf(gridEle);
          ganttObj.selectRow(index);
        }
        if (chartEle) {
            var index = chartEle.ariaRowIndex;
            ganttChart.selectRow(Number(index));
        }
        let record: any = args.draggedNodeData;
        let selectedData = ganttObj.flatData[ganttObj.selectedRowIndex];
        let selectedDataResource = selectedData.taskData.resources;
        let resources = [];
        if (selectedDataResource) {
            for (var i = 0; i < selectedDataResource.length; i++) {
              resources.push(selectedDataResource[i].resourceId);
            }
        }
        resources.push(parseInt(record.id));
        if (chartEle || gridEle) {
            var data = {
                TaskID: selectedData.taskData.TaskID,
                resources: resources
            };
            gantt.updateRecordByID(data);
            var elements = document.querySelectorAll('.e-drag-item');
            while (elements.length > 0 && elements[0].parentNode) {
                elements[0].parentNode.removeChild(elements[0]);
            }
        }
    }
});
let gantt: Gantt = new Gantt({
    dataSource: editingData,
    resources: editingResources,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks',
        dependency: 'Predecessor',
        resourceInfo: 'resources'
    },
    resourceFields: {
        id: 'resourceId',
        name: 'resourceName'
    },
    labelSettings: {
        leftLabel: 'TaskName',
        rightLabel: 'resources'
    },
    splitterSettings: {
        position: "50%"
    },
    editSettings: {
        allowEditing: true
    }
});
treeObj.appendTo('#TreeView');
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>
	<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    <div id='loader'>Loading....</div>
    <div id='container'>
        <b><label>Gantt</label></b>
        <div id='Gantt'></div>
        <b><label>List</label></b>
        <div id='TreeView'></div>
    </div>
</body>

</html>

The following screenshot shows dropping record from another component in to Gantt, and Rose Fuller is added as resource for the task Develop floor plan estimation.

Dropping Record