AngularJS TypeScript directive link function -

i'm trying create angularjs directive using typescript. directive requires 'ngmodel' , i'm using custom service injected in directive. main problem service can't used inside link function.

here example of i'm trying achieve:

module app.directives {      export var directivename: string = "thedirective";      angular.module("myapp").directive(directivename,             (myfactory: app.services.myfactory) =>            {                 return new mydirective(myfactory);            });      export interface imydirectivescope extends ng.iscope {         ngmodel: ng.ingmodelcontroller;     }      export class mydirective implements ng.idirective {          restrict = "a";         require = "ngmodel";         scope = {             ngmodel:'='         }          constructor(private myfactory: app.services.myfactory) {          }           link(scope: imydirectivescope , elem: jquery, attributes: ng.iattributes, ngmodel: ng.ingmodelcontroller) {             //this window here              elem.bind('blur', (evt: jqueryeventobject) => {                    //keyword window here, yeah bummer indeed                  validate();              });              function validate() {                  //i need use factory here, can seem it.                  //this window , i'm kinda stuck here             }         }     } } 

i can't seem find more advanced stuff on topic. examples don't find don't seem uses services or complex link function. please answer question sort of example. it's trickery think.

update: fact 'this' inside link function window , not 'mydirective' doesn't make sense me. ideas why be?

classes work great controllers , directive controllers don't think i'd use 1 whole directive. if want you'd have this:

export class mydirective implements ng.idirective {      public link;      restrict = "a";     require = "ngmodel";     scope = {         ngmodel:'='     }      constructor(private myfactory: app.services.myfactory) {         this.link = this.unboundlink.bind(this);     }       unboundlink(scope: imydirectivescope , elem: jquery, attributes: ng.iattributes, ngmodel: ng.ingmodelcontroller) {         //now should able access myfactory         this.myfactory.dosomething();          elem.bind('blur', (evt: jqueryeventobject) => {                //keyword window here, yeah bummer indeed              validate();          });          function validate() {              //i need use factory here, can seem it.              //this window , i'm kinda stuck here         }     } } 

edit: without class this:

angular.module("myapp").directive("thedirective",      function(myfactory: app.services.myfactory) {         return {             restrict: 'a',             require: 'ngmodel',             scope: {'ngmodel': '='},             link: function(scope: imydirectivescope , elem: jquery, attributes: ng.iattributes, ngmodel: ng.ingmodelcontroller) {                 //you can access myfactory this.                 myfactory.dosomething();             }         }     } );