Develop Reference

angular4 Image annotation - Image annotation from angular1 to angular4 convertion issues and Equalents of 1.x to 4

With my below angular1.x script code for image annotation I have searched for a solution to solve my conversion error but I didn't get many equalents of angular1.x code in angular4. The error is a runtime error for angular1.x when I try to convert into Angular4. See below.
For $inject I use #inject but it is quite difficult to use it in my code for converting angular 1.x image annotation to angular4 image annotation.
Image annoation in angular1.x
------------------------------
annotoriousAnnotateDirective.$inject = ['annotoriousService', 'setTimeout()'];
annotoriousAnnotateDirective(annotoriousService, setTimeout(()=> {
service = {
restrict: 'A',
link: annotateLink,
priority: 100
},
return service;
link.$inject = ['$scope', '$element', '$attributes'];
annotateLink($scope, $element, $attributes)=> {
if ($attributes.src) {
annotoriousService.makeAnnotatable($element[0]);
} else {
$element.bind('load', function () {
$scope.$apply(function () {
annotoriousService.makeAnnotatable($element[0]);
});
});
}
}
}, 200);
annotoriousDirective.$inject = ['$compile', '$rootScope', '$http', '$parse', '$timeout', 'annotoriousService'];
annotoriousDirective($compile, $rootScope, $http, $parse, $timeout, annotoriousService)=> {
let service = {
restrict: 'E',
scope: {
open: '=',
options: '=',
onOpen: '&',
onLoad: '&',
onComplete: '&',
onCleanup: '&',
onClosed: '&'
},
require: 'annotorious',
link: link,
controller: controller,
controllerAs: 'vm'
};
return service;
controller.$inject = ['$scope'];
controller($scope) {
}
link.$inject = ['$scope', '$element', '$attributes'];
function link($scope, $element, $attributes, controller) {
var cb = null;
$scope.$watch('open', function (newValue, oldValue) {
//console.log("watch $scope.open(" + $scope.open + ") " + oldValue + "->" + newValue);
if (oldValue !== newValue) {
updateOpen(newValue);
}
});
$scope.$on('$destroy', function () {
$element.remove();
});
init();
updateOpen(newValue) {
if (newValue) {
init(newValue);
} else {
if (options.annotationsFor) {
let annotatables = $(options.annotationsFor);
annotatables.each(function (idx) {
let item = this;
annotoriousService.makeAnnotatable(item);
});
}
}
}
init(open) {
let options = {
//href: $attributes.src,
annotationsFor: $attributes.annotationsFor,
onOpen() {
if (this.onOpen && this.onOpen()) {
this.onOpen()();
}
},
onLoad() {
if (this.onLoad && this.onLoad()) {
this.onLoad()();
}
},
onComplete() {
onComplete();
if (this.onComplete && this.onComplete()) {
this.onComplete()();
}
},
onCleanup() {
if (this.onCleanup && this.onCleanup()) {
this.onCleanup()();
}
},
onClosed() {
$scope.$apply(function () {
$scope.open = false;
});
if ($scope.onClosed && $scope.onClosed()) {
$scope.onClosed()();
}
}
};
if (options) {
Object.assign(options, this.options);
}
for (let key in options) {
if (options.hasOwnProperty(key)) {
if (typeof(options[key]) === 'undefined') {
delete options[key];
}
}
}
if (typeof(open) !== 'undefined') {
options.open = open;
}
$timeout(function () {
if (options.annotationsFor) {
$(options.annotationsFor).each(function (i) {
var itemToAnnotate = this;
annotoriousService.makeAnnotatable(itemToAnnotate);
});
}
}, 0);
}
My error code:

I found equalent for #Inject in angular4 ,
import { Inject } from '#angular/core';
import { ourservice } from 'servicepath';
export class{
constructor(#Inject(Ourservice / Directive/ etc) private ourservice){
//our functionality
}
}
If any corrections please let me know, I am still looking solution for Image annotation in angular4

Directive can't use data resolved by a controller

Consider the initial app main state:
$stateProvider.state('main', {
url: '',
views: {
'nav#': {
templateUrl: baseTemplatesUrl + 'nav.main.html',
controllerAs: 'vm',
controller: 'mainNavController',
resolve: {
timelinesService: 'timelinesService'
}
},
'content#': {
template: ''
}
}
});
Inside the nav.main.html template I'm trying to use a simple slider directive:
<ul>
<li ng-repeat="t in vm.timelines">
<!-- ui-sref=".timeline({yearFrom: t.yearFrom, yearTo: t.yearTo})" -->
<a class="button tiny" ui-sref-active="active">{{t.text}}</a>
</li>
</ul>
<div simple-slider items="vm.timelines" on-item-clicked="vm.timelineClicked"></div>
The directive is defined as:
function simpleSlider() {
return {
restrict: 'EA',
templateUrl: baseTemplatesUrl + 'directive.simpleSlider.html',
replace: true,
scope: {
items: '=',
onItemClicked: '&'
},
link: function(scope, el, attr, ctrl) {
scope.curIndex = 0;
scope.next = function() {
scope.curIndex < scope.items.length - 1 ? scope.curIndex++ : scope.curIndex = 0;
};
scope.prev = function() {
scope.curIndex > 0 ? scope.curIndex-- : scope.curIndex = scope.items.length - 1;
};
scope.$watch('curIndex', function() {
scope.items.forEach(function(item) {
item.active = false;
});
scope.items[scope.curIndex].active = true;
});
},
};
}
The problem
On a page load the directive's $watch throws an exception saying that scope.items[scope.curIndex] is undefined, whereas the ng-repeat="t in vm.timelines" inside the nav.main.html template renders successfully.
Why the watch fails / how to pass vm.timelines to directive's scope?
The fiddle
https://jsfiddle.net/challenger/Le5p9aup/
Update 1. Regarding #Lex answer
The fiddle is working. But my setup differs from the given fiddle. In my setup the timelinesService returns the $http promise:
var service = {
getTimelines: function() {
return $http.get('/api/timelines');
}
};
then inside the navMainController the vm.timelines array gets populated:
vm.timelines = [];
timelinesService.getTimelines().then(function(response) {
vm.timelines = response.data.timelines;
}).catch(function(error) {
console.log(error);
});
Then, unless you click the directive's prev/next button, the $watch will fail:
// scope.items[scope.curIndex] is undefined
scope.items[scope.curIndex].active = true;

Why after remove directive "person" instance of class still exists?

I spent more time for understand why instance of class after remove directive does not destroy. I wrote the following code. Please help me to resolve it. Code provide below. The result in the console log!!
'use strict';
var app = angular.module('app', []);
app.controller('mainController', function($scope, Service) {
$scope.service = Service;
$scope.checkAll = function () {
$scope.service.triggerListener('update');
};
$scope.add = function () {
$scope.count.push({});
};
$scope.object = {
updateAll: function () {
console.log('Count of directive "person"');
}
};
$scope.removeElement = function () {
$scope.count.splice(0, 1);
};
$scope.count = [0, 1, 2, 3, 4];
});
app.service('Service', function() {
this.listeners = [];
this.addListeners = function (object, event, callback) {
if (!this.listeners.hasOwnProperty(event)) {
this.listeners[event] = [];
}
this.listeners[event].push(object[callback]);
};
this.triggerListener = function(event) {
if (this.listeners.hasOwnProperty(event)) {
for (var i = 0; i < this.listeners[event].length; i++) {
this.listeners[event][i]();
}
}
};
});
app.directive('person', function() {
var directive = {
restrict: 'E',
template: '<button id="{{vm.index}}">Person</button> ' +
'<button ng-click="vm.add(index)">add</button>' +
'<button ng-click="vm.removeElement(index)">Clear</button>',
scope: {
index: '=',
service: '=',
removeElement: '&',
object: '=',
add: '&'
},
controller: function() {
},
link: function (scope) {
scope.vm.service.addListeners(scope.vm.object, 'update', 'updateAll');
},
controllerAs: 'vm',
bindToController: true
};
return directive;
});
<!DOCTYPE html>
<html lang="en" ng-app="app">
<head>
<meta charset="UTF-8">
<title></title>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.2/angular.min.js"></script>
<script src="script.js"></script>
</head>
<body ng-controller="mainController">
<div ng-repeat="item in count">
<person add="add()" index="$index" service="service" object="object" remove-element="removeElement()" show="show()">{{$index}}</person>
</div>
<button ng-click="checkAll()">Count of "person" directive</button>
</body>
</html>

Your directive only adds to the listeners array ... but there is nothing in your code to remove anything from that array
You need a removeListener method that would be called in the removeElement method.
$scope.removeElement = function () {
var index = // get index of element
$scope.count.splice(index, 1);
Service.removeListener(index);
};
In service:
this.removeListener = function(index){
this.listeners.splice(index,1);
};
Alternatively you could use $destroy event in directive:
link: function (scope) {
Service.addListeners(scope.vm.object, 'update', 'updateAll');
scope.$on('$destroy', function(){
Service.removeListener(scope.index);
});
},
Note that injecting Service into directive is simpler and cleaner than passing it through html attributes to scope
app.directive('person', function(Service) {

Strange behavior passing scope to directive

I have created a directive below:
html:
<div image-upload></div>
directive:
angular.module('app.directives.imageTools', [
"angularFileUpload"
])
.directive('imageUpload', function () {
// Directive used to display a badge.
return {
restrict: 'A',
replace: true,
templateUrl: "/static/html/partials/directives/imageToolsUpload.html",
controller: function ($scope) {
var resetScope = function () {
$scope.imageUpload = {};
$scope.imageUpload.error = false;
$scope.imageUpload['image_file'] = undefined;
$scope.$parent.imageUpload = $scope.imageUpload
};
$scope.onImageSelect = function ($files) {
resetScope();
$scope.imageUpload.image_file = $files[0];
var safe_file_types = ['image/jpeg', 'image/jpg']
if (safe_file_types.indexOf($scope.imageUpload.image_file.type) >= 0) {
$scope.$parent.imageUpload = $scope.imageUpload
}
else {
$scope.imageUpload.error = true
}
};
// Init function.
$scope.init = function () {
resetScope();
};
$scope.init();
}
}
});
This directive works fine and in my controller I access $scope.imageUpload as I required.
Next, I tried to pass into the directive a current image but when I do this $scope.imageUpload is undefined and things get weird...
html:
<div image-upload current="project.thumbnail_small"></div>
This is the updated code that gives the error, note the new current.
angular.module('app.directives.imageTools', [
"angularFileUpload"
])
.directive('imageUpload', function () {
// Directive used to display a badge.
return {
restrict: 'A',
replace: true,
scope: {
current: '='
},
templateUrl: "/static/html/partials/directives/imageToolsUpload.html",
controller: function ($scope) {
var resetScope = function () {
$scope.imageUpload = {};
$scope.imageUpload.error = false;
$scope.imageUpload['image_file'] = undefined;
$scope.$parent.imageUpload = $scope.imageUpload
if ($scope.current != undefined){
$scope.hasCurrentImage = true;
}
else {
$scope.hasCurrentImage = true;
}
};
$scope.onImageSelect = function ($files) {
resetScope();
$scope.imageUpload.image_file = $files[0];
var safe_file_types = ['image/jpeg', 'image/jpg']
if (safe_file_types.indexOf($scope.imageUpload.image_file.type) >= 0) {
$scope.$parent.imageUpload = $scope.imageUpload
}
else {
$scope.imageUpload.error = true
}
};
// Init function.
$scope.init = function () {
resetScope();
};
$scope.init();
}
}
});
What is going on here?
scope: {
current: '='
},
Everything works again but I don't get access to the current value.
Maybe I'm not using scope: { correctly.

in your updated code you use an isolated scope by defining scope: {current: '=' } so the controller in the directive will only see the isolated scope and not the original scope.
you can read more about this here: http://www.ng-newsletter.com/posts/directives.html in the scope section

binding data to angularjs from external model

I've got directive and service in my app (declared in separate files):
Service:
(function(){
angular.module('core', [])
.factory('api', function() {
return {
serviceField: 100
};
})
})();
Directive:
(function(){
angular.module('ui', ['core'])
.directive('apiFieldWatcher', function (api) {
return {
restrict: 'E',
replace: true,
scope: true,
template: '<div>+{{apiField}}+</div>',
controller: function($scope) {
$scope.apiField = 0;
},
link: function (scope) {
scope.$watch(function(){return api.serviceField}, function(apiFld){
scope.apiField = apiFld;
});
}
}
});
})();
And in another separate file I have native model:
function Model() { this.fld = 0; }
Model.prototype.setFld = function(a) { this.fld = a; }
Model.prototype.getFld = function() { return this.fld; }
How can I bind (two way) my native this.fld field to value in my AngularJS service?

The solution is in using this code:
Model.prototype.setFld = function(a) {
this.fld = a;
injector.invoke(['$rootScope', 'api', function($rootScope, api){
api.setField(a);
$rootScope.$digest();
}]);
};
Model.prototype.getFldFromApi = function() {
var self = this;
injector.invoke(['api', function(api){
self.fld = api.getField();
}]);
};
http://plnkr.co/edit/nitAVuOtzGsdJ49H4uyl
i think it's bad idea to use $digest on $rootScope, so we can maybe use
var scope = angular.element( elementObject ).scope();
to get needed scope and call $digest for it