Flex Grid Inside PopUp

HTML

<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="http://cdn.wijmo.com/5.20161.138/styles/wijmo.min.css">
<script src="http://cdn.wijmo.com/5.20161.138/controls/wijmo.min.js"></script>
<script src="http://cdn.wijmo.com/5.20161.138/controls/wijmo.grid.min.js"></script>
<script src="http://cdn.wijmo.com/5.20161.138/controls/wijmo.input.min.js"></script>
<script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
<script src="http://cdn.wijmo.com/5.20161.138/interop/angular/wijmo.angular.min.js"></script>
<div ng-app="myApp">
        <div ng-controller="appController">
            <button id="btnPopup">Show Popup</button>
            <wj-popup owner="#btnPopup"
                      style='margin:250px ;padding:20px;align-self:center;'                      
                      modal="true"
                      hide-trigger="None">
                <wj-flex-grid items-source="view" 
                              selection-mode="ListBox"
                              copying="copying(e)"
                              control="flex">
                </wj-flex-grid>
                <button class="wj-hide">Cancel</button>
            </wj-popup>           
        </div>
    </div>

JavaScript

var _CITIES=[{ Name: 'Chennai', isCapital: false, isMetro: true },
                      { Name: 'New Delhi cxxvcbcnbxnbcncxbnbnxbncbxvnbcxnvbncxbvnbcxnvbnxcbvncxbvnbcxnbvnxcbvncbxnvbncxbvnxcbvnbcxnbvncxbvncxbvncbxvbxcnbvnxcbvnxbvnbxcnvbxncbvnxbvnxbcvnbcxnbvnxcbvnxbcvnbxncbvncbxvb', isCapital: true, isMetro: true },
                      { Name: 'Kolkata', isCapital: false, isMetro: true },
                      { Name: 'Agra', isCapital: false, isMetro: false },
                      { Name: 'Mumbai', isCapital: false, isMetro: true },
                      { Name: 'Bangalore', isCapital: false, isMetro: true },
                      { Name: 'Kanpur', isCapital: false, isMetro: false }];
        var app = angular.module('myApp', ['wj']);
        app.controller('appController', ['$scope', function ($scope) {
           
            $scope.view = new wijmo.collections.CollectionView(_CITIES);
            
            $scope.copying=function(e){
            console.log('copied');
            };
        }]);