igGrid readOnly when edit and not readOnly when add row

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>

JavaScript

$(function () {
						var ednterEditRow = false;
            
            $("#grid").igGrid({
                primaryKey: "EmployeeID",
                width: '100%',
                autoCommit: true,
                columns: [
                    { headerText: "Employee ID", key: "EmployeeID", dataType: "number", width: "15%" },
                    { headerText: "First Name", key: "FirstName", dataType: "string", width: "25%" },
                    { headerText: "Last Name", key: "LastName", dataType: "string", width: "25%"},
                    { headerText: "Title", key: "Title", dataType: "string", width: "35%" }
                ],
                autofitLastColumn: false,
                autoGenerateColumns: false,
                dataSource: northwind,
                responseDataKey: "results",
                //handle cellClick event
                cellClick: function(evt, ui) {
                		//if the click is on EmployeeID or Title cancel the edit 
                     if (ui.colKey === "EmployeeID" || ui.colKey === "Title") {
                     		ednterEditRow = false;
                     } else {
                     //else the click is on FirstName or LastName enter edit 
												ednterEditRow = true;
                     }
                },    
                features: [
                	{
                			name: "Updating",
                			enableAddRow: true,
                			editMode: "row",
                			enableDeleteRow: true,
                			columnSettings: [
                      		{ 
                          	//all time read only column
                          	columnKey: "EmployeeID",
                          	readOnly: true
                          },
                    			{ 
                          	//only when edit read only column
                          	columnKey: "Title",
                          	readOnly: false
                          }
                			],                  		
                ...