Wijmo 5 - Context Menu on a FlexGrid

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.grid.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.filter.min.js"></script>
<script src="http://cdn.wijmo.com/5.latest/interop/angular/wijmo.angular.min.js"></script>
<div ng-app="app" ng-controller="appCtrl">
    
<h1>FlexGrid custom sort order</h1>

    <wj-flex-grid
        items-source="data"
        control="grid"
        initialized="init(grid)">
        <wj-flex-grid-filter initialized="initFilter(s)"></wj-flex-grid-filter>
    </wj-flex-grid>
</div>

CSS

.wj-flexgrid {
     height:200px;
}

JavaScript

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

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

    $scope.data = getData(50);
    $scope.init = function(grid){    
    // define sort converter for grid values
    	grid.collectionView.sortConverter = function(sd, item, value){
      	// define sort order
      	var sortOrder = {
        	"ok": 1,
          "warning": 2,
          "error": 3
        };
        // if sorting by validation, then apply custom sort order
        if(sd.property == 'validation'){
        	return sortOrder[value.toLowerCase()];
        }
        
        return value;
      }
    }
    
    $scope.initFilter = function(filter){
    	var uValues = 'Ok,Warning,Error'.split(',');
      // get col filter
      var cFilter = filter.getColumnFilter('validation');
      // disable sort
      cFilter.valueFilter.sortValues = false;
      // assign values in our order
      cFilter.valueFilter.uniqueValues = uValues;
    }
});

function getData(count){
	// create some random data
    var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','),
    		validations = 'Error,Ok,Warning'.split(','),
        data = [];
    for (var i = 0; i < count; i++) {
        data.push({
            country: countries[i % countries.length],
            validation: validations[Math.floor(Math.random()*validations.length)],
            downloads: Math.round(Math.random() * 20000),
            sales: Math.random() * 10000,
            expenses: Math.random() * 5000
        });
    }
    
    return data;
}