Angular JS Magazine

duminică, 28 septembrie 2014

Custom Directive - Order List And Property Expressions

In Custom Directive - Order List And Property you saw how to specify the property that should be listed. Well, the prizemoney property was successfully listed, but it wasn't formatted as a currency. In order to do that you need to  use  the built-in currency filter:

 <div ordered-list="players" marker-type="i" property-name="prizemoney | currency"></div>

This will work only if we tell Angular to evaluate this expression instead of using it literally. This is accomplished through the scope.$eval method:

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script src="../angular/angular.min.js"></script>
    <style type="text/css">
    </style>
    <script>
        angular.module("appModule", [])
                .controller("appCtrl", function ($scope) {
                    $scope.players = [
                        { name: 'Nadal, Rafael (ESP)', rank: 1, age: '28', prizemoney: 66149345 },
                        { name: 'Djokovic, Novak (SRB)', rank: 2, age: '27', prizemoney: 70704129 },
                        { name: 'Federer, Roger (SUI)', rank: 3, age: '33', prizemoney: 84827704 },
                        { name: 'Wawrinka, Stan (SUI)', rank: 4, age: '29', prizemoney: 13155060 },
                        { name: 'Ferrer, David (ESP)', rank: 5, age: '32', prizemoney: 24034072 },
                        { name: 'Tsonga, Jo-Wilfried (FRA)', rank: 11, age: '29', prizemoney: 1708240 },
                        { name: 'Simon, Gilles (FRA)', rank: 26, age: '29', prizemoney: 760469 },
                        { name: 'Lopez, Feliciano (ESP)', rank: 20, age: '33', prizemoney: 1100579 },
                        { name: 'Benneteau, Julien (FRA)', rank: 28, age: '32', prizemoney: 617688 },
                        { name: 'Verdasco, Fernando (ESP)', rank: 33, age: '30', prizemoney: 689219 },
                        { name: 'Mayer, Leonardo (ARG)', rank: 25, age: '27', prizemoney: 946294 }
                    ];
                })
                .directive("orderedList", function () {
                    return function (scope, element, attrs) {
                        var data = scope[attrs["orderedList"]];
                        var marker = attrs["markerType"];
                        var property_exp = attrs["propertyName"];
                        if (angular.isArray(data)) {
                           var listElem = angular.element("<ol type=" + marker + ">");
                           element.append(listElem);
                           for (var i = 0; i < data.length; i++) {
                            listElem.append(angular.element('<li>').text(scope.$eval(property_exp, data[i])));
                            }
                        }
                    }
                });
    </script>
</head>
<body>
<div ng-app="appModule" ng-controller="appCtrl">

    <h4>Creating a Simple Custom Directive - List Directive</h4>

    <div ordered-list="players" marker-type="i" property-name="prizemoney | currency"></div>
</div>
</body>
</html>