feat(api): expose controller with open, close and toggle function via…

… w11k-select attribute value to parent scope

src/w11k-select.js

@@ -200,6 +200,27 @@ angular.module('w11k.select').directive('w11kSelect', [
       templateUrl: w11kSelectConfig.common.templateUrl,
       scope: {},
       require: 'ngModel',
+      controller: function ($scope, $attrs, $parse) {
+        if ($attrs.w11kSelect && $attrs.w11kSelect.length > 0) {
+          var exposeExpression = $parse($attrs.w11kSelect);
+
+          if (exposeExpression.assign) {
+            exposeExpression.assign($scope.$parent, this);
+          }
+        }
+
+        this.open = function () {
+          $scope.dropdown.open();
+        };
+
+        this.close = function () {
+          $scope.dropdown.close();
+        };
+
+        this.toggle = function () {
+          $scope.dropdown.toggle();
+        };
+      },
       compile: function (tElement, tAttrs) {
         var configExpParsed = $parse(tAttrs.w11kSelectConfig);
         var optionsExpParsed = w11kSelectHelper.parseOptions(tAttrs.w11kSelectOptions);