Wijmo 5 - FlexGrid CustomFilter 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.latest/styles/wijmo.min.css">
<script src="http://cdn.wijmo.com/5.latest/controls/wijmo.min.js"></script>
<script src="http://cdn.wijmo.com/5.latest/controls/wijmo.input.min.js"></script>
<script src="http://cdn.wijmo.com/5.latest/controls/wijmo.grid.min.js"></script>
<script src="http://cdn.wijmo.com/5.latest/controls/wijmo.grid.filter.min.js"></script>
<script src="http://cdn.wijmo.com/5.latest/interop/angular/wijmo.angular.min.js"></script>
<!-- mark this as an Angular application and give it a controller -->
<div ng-app="app" ng-controller="appCtrl" class="container">
<button ng-click="filterOpen()">
DD
</button>
  <wj-flex-grid control="grid" items-source="data">
  </wj-flex-grid>

<wj-popup control="customFilter" show-trigger=0 >
  <h1>
    Custom Filter
  </h1>
  <button class="wj-hide-ok">
  Close
  </button>
</wj-popup>
</div>

CSS

.wj-flexgrid {
  height: 150px; 
  margin-top:10px;
 }
 .wj-flexchart {
   height: 300px;
 }

JavaScript

// define app, include Wijmo 5 directives
var app = angular.module('app', ['wj']);

// controller
app.controller('appCtrl', function($scope) {

  // create some random data
  var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','),
    data = [];
  for (var i = 0; i < countries.length; i++) {
    data.push({
      country: countries[i],
      downloads: Math.round(Math.random() * 20000),
      sales: Math.random() * 10000,
      expenses: Math.random() * 5000
    });
  }

  // expose data as a CollectionView to get events
  $scope.data = new wijmo.collections.CollectionView(data);
  $scope.filterOpen=function(){
  	$scope.filter.editColumnFilter($scope.grid.columns.getColumn("country"));
  }
  $scope.$watch("grid",function(){
  	var grid= $scope.grid;
    if(grid){
    grid.columns[0].visible=false;
    // create Filter instance to add Filter Icon		
      $scope.filter=new wijmo.grid.filter.FlexGridFilter(grid);
      var filter=$scope.filter;
      // cancel Filter Dialog open
      filter.filterChanging.addHandler(function(s,e){
      //	e.cancel=true;
      })
      // handle click event for FlexGrid and open custom filter
    /* 	grid.hostElement.addEventListener("click",function(e){
    	      var ht= grid.hitTest(e);
    	         if(e.target.className=="wj-glyph-filter" || e.target.className=="wj-elem-filter"){
    	          var cstmFilter=$scope.customFilter;
    	          cstmFilter.owner=e.target;
    	          if(!cstmFilter.isVisible){
    	            cstmFilter.show();
    	          }else{
    	            cstmFilter.hide();
    	          }
    	          
    	        }
    	      },true) */
    }
  })
});