igGrid - Add row at any row position

by georgianastasov

HTML

<script src="https://igniteui.com/js/modernizr.min.js"></script>
<script src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.10.3/jquery-ui.min.js"></script>
<script src="https://cdn-na.infragistics.com/igniteui/latest/js/infragistics.core.js"></script>
<script src="https://cdn-na.infragistics.com/igniteui/latest/js/infragistics.lob.js"></script>
<script src="https://igniteui.com/js-data/northwind"></script>
<link href="https://cdn-na.infragistics.com/igniteui/latest/css/themes/infragistics/infragistics.theme.css" rel="stylesheet"></link>
<link href="https://cdn-na.infragistics.com/igniteui/latest/css/structure/infragistics.css" rel="stylesheet"></link>

<table id="grid"></table>
<input type="button" id="addRow" value="Add row on spec position" style="margin-top: 1rem"/>

JavaScript

var data = [
    { "ID": 1, "Name": "Nancy", "LastName": "Davolio", "Age": 26, "City": "Detroit" },
    { "ID": 2, "Name": "Andrew", "LastName": "Fuller", "Age": 27, "City": "Kanzas" },
    { "ID": 3, "Name": "Janet", "LastName": "Leverling", "Age": 24, "City": "New York" },
    { "ID": 4, "Name": "Margaret", "LastName": "Peacock", "Age": 29, "City": "Detroit" },
    { "ID": 5, "Name": "Steven", "LastName": "Buchanan", "Age": 25, "City": "Washington" },
    { "ID": 6, "Name": "Michael", "LastName": "Suyama", "Age": 23, "City": "Miami" },
    { "ID": 7, "Name": "Robert", "LastName": "King", "Age": 21, "City": "Las Vegas" },
    { "ID": 8, "Name": "Laura", "LastName": "Callahan", "Age": 27, "City": "Las Angeles" }
];

$(function () {
            $("#grid").igGrid({
                primaryKey: "ID",
                width: '100%',
                autocomit: true,
                columns: [
                    { headerText: "ID", key: "ID", dataType: "number", width: "10%" },
                    { headerText: "First Name", key: "Name", dataType: "string", width: "25%" },
                    { headerText: "Last Name", key: "LastName", dataType: "string", width: "25%"},
                    { headerText: "Age", key: "Age", dataType: "number", width: "25%" },
                    { headerText: "City", key: "City", dataType: "string", width: "25%" }
                ],
                autofitLastColumn: false,
                autoGenerateColumns: false,
                dataSource: data,
                responseDataKey: "results",
                features: [
                    {
                        name: "Updating",
                        enableAddRow: true,
               	 				editMode: "row",
                				enableDeleteRow: true,
                        rowAdding: function(evt, ui){
                        	//get the data
                    			var ds = ui.owner.grid.dataSource;
                          //get the primary key
                    			var pk =...