AngularJS directive for accessing ng-repeat scope of child - angularjs

Okay, so let me start off saying that I have a directive that creates a JQueryUI tab setup with a backing field that populate the tab name and the tab contents basically.
<div id="summaryTabPanel">
<ul>
<li ng-repeat="category in SummaryCategories">
{{category.Name}}
</li>
</ul>
<div ng-repeat="category in SummaryCategories" id="tabs-{{$index + 1}}">
{{category.Content}}
</div>
</div>
So as you can see, I have a <ul> with an ng-repeat in the <li>.
As I will be applying JQueryUI Tab function to the parent container id="summaryTabPanel", I need to wait until all the dom is rendered.
So I do some research, and find out I need to create a directive that kind of looks like the following:
Application.Directives.directive("repeatDone", function () {
return {
restrict: "A",
link: function (scope, element, attrs) {
scope.$watch("repeatDone", function () {
if (scope.$last) {
$("#summaryTabPanel").tabs({
event: "mouseover"
});
}
;
});
}
};
});
This watches to see if the last repeated item is found, and then applies the DOM changes via the statement $("#summaryTabPanel").tabs()
This is all fine and good, but it only works if I apply the directive to the last ng-repeated child item of the summaryTabPanel container.
<div id="summaryTabPanel">
<ul>
<li ng-repeat="category in SummaryCategories">
{{category.Name}}
</li>
</ul>
<div ng-repeat="category in SummaryCategories" id="tabs-{{$index + 1}}" repeat-done>
{{category.Content}}
</div>
</div>
If I move it to the previous ng-repeat item things work but not quite right. If I move it to the parent container, things don't work at all.
It seems wrong to me to apply this directive to the last child, and instead have a way to apply it to the root and somehow accomplish the same thing.
<div id="summaryTabPanel" repeat-done>
Is this possible somehow with Angular?

According to this link you should write your directive like this
Application.Directives.directive("repeatDone", function () {
return {
restrict: "A",
link: function (scope, element, attrs) {
$timeout( function () {
$("#summaryTabPanel").tabs({
event: "mouseover"
});
});
}
});
Please have a look at the jsfiddle I created to illustrate your case.

Related

How to pass the value to the local scope of the directive?

I'm learning directives, it's cool thing but sometimes a little complicated. Please can somebody explain this:
I have custom directive with template of little form and it own local scope, and want to change the list of items form the main controller.
Please see it:
By clicking on change button I open a custom directive with input form template
<body ng-controller="testCtrl">
<h1>Hello Plunker!</h1>
<ul>
<li ng-repeat="item in list">
<div> {{item}} </div>
<button ng-click="edit()">Change</button>
<change ng-if='editable'></change>
</li>
</ul>
</body>
"Change" is the custom directive with the input form inside the other Html file
.directive('change', function(){
return {
restrict: "E",
replace: true,
scope: {
show: '='
},
templateUrl: "other.html"
}
})
Also there is another directive inside "change" directive. It's a button which I want to use inside "change" directive and inside my main controller. I can see my item list only from scope.$parent.item, but how to pass it in the function of my button directive?
How can I implement this?
.directive('save', function(){
return {
restrict: "E",
replace: true,
template: ' <button class="btn btn-sm btn-warning" ng-click="saving(item)">SAVE</button>',
link: function(scope,element,attr){
scope.saving = function(item){
console.log(item);
console.log(scope.$parent.item)
}
}
}
})
Please see the example: Plnkr
P.S. Sorry for my explanation, I hope that everything is clear
Simply pass in the item to each of your directives that need access to it. For example:
<li ng-repeat="item in list">
//snip
<save item="item"></save>
//snip
</li>
And then define your directive to bind the attribute to the scope:
.directive('save', function(){
return {
//snip
scope: {
item: '=' //two-way binding to 'scope.item'
},
//snip
link: function(scope, element, attr){
scope.saving = function() {
console.log(scope.item);
}
};
});
In angularjs, you have the $emit event.
Dispatches an event name upwards through the scope hierarchy notifying the registered $rootScope.Scope listeners.
$rootScope.Scope
HTML
<body ng-controller="testCtrl">
<h1>Hello Plunker!</h1>
<ul>
<li ng-repeat="item in list">
<div> {{item}} - <input type="text" ng-model="item">
<button ng-click="edit()">Change</button>
</div>
<div>
<change ng-if='editable'></change>
</div>
</li>
</ul>
</body>
Directive
directive('save', function(){
return {
restrict: "E",
replace: true,
template: ' <button class="btn btn-sm btn-warning" ng-click="saving(item, $parent.$index)">SAVE</button>',
link: function(scope,element,attr, controller){
scope.saving = function(item, index){
//Build our object with the index of $scope.list which is updated & the item value
var obj = {
index: index,
item: item
};
//Emit a 'change' event, and we pass our object data
scope.$emit('change', obj)
}
}
}
})
In the "change" directive, we use $emit to pass event, and to notify our $rootScope.Scope.
In the "change" directive template, you can see that we pass the $parent.$index and not the $index, in order to get the current item of the list.
Controller
controller('testCtrl', function($scope){
$scope.list = [1,2,3,4,5,6,7,8,9];
//Listen for 'change' event
$scope.$on('change', function(event,value){
//Set to the list value.index our value.item
$scope.list[value.index] = value.item;
});
$scope.editable = false;
$scope.edit = function(){
$scope.editable = !$scope.editable;
}
})

angularjs directive calls image effect script

I have a directive to make news item to have an effect like usatoday.com when user hover on the news. I'm new to angularjs :D
Directive:
app.directive('hotEvent', ['$rootScope', function ($rootScope) {
return {
restrict: 'EA',
templateUrl: '/App/Main/views/home/events.html',
link: function (scope, iElement, attrs) {
//attrs references any attributes on the directive element in html
var dathumb = $(iElement).find('.da-thumbs > li a');
//$(function () {
dathumb.each(function () {
$(this).hoverdir();
});
//});
}
};
}]);
View: /App/Main/views/home/events.html
<ul class="row da-thumbs">
<li ng-repeat="news in featuredEvents">
<a href="/">
<img src="abc.jpg" /> >> no effect ???
<div>
<h4>aaa</h4>
<p>
bbb
</p>
</div>
</a>
</li>
<li>
<a href="/">
<img src="abc.jpg" /> >> show effect
<div>
<h4>bbb</h4>
<p>
ccc
</p>
</div>
</a>
</li>
</ul>
On Home.html: (which already binded with controller)
<div hot-event></div>
It works when i don't bind data from the controller <li ng-repeat="news in featuredEvents">, now the effect just doesn't show up. Console.log show 0 error.
UPDATED: i ended up using document ready
app.directive('hotEvent', function () {
return {
restrict: 'EA',
templateUrl: '/App/Main/views/home/events.html',
link: function ($scope, iElement, attrs) {
angular.element(document).ready(function () {
var dathumb = $(iElement).find('.da-thumbs > li a');
dathumb.each(function () {
$(this).hoverdir();
});
});
}
}
});
If you debug your code you'd see that your directive didn't find any elements.
It happens because when the template loads, the directive link function gets called, but the ng repeat didn't have time to populate it self (it starts off empty), there for it's no where to be found.
An easy workaround is to use the jquery find method in a setTimeout 0 function, or use $scope.evalAsync on the function that does the jquery find (it requires angular 1.3).
But the best solution would be to fix the code to actually not require jquery.
P.s. when you see your self using selectors in a directive you are usually doing things wrong in angular (note: usually), please refer to this "Thinking in AngularJS" if I have a jQuery background? awesome question and answer.
note that he actually says that when you first learn angular, don't use jquery at all :)

Directive to directive scope

This is related to a question: Listen for broadcast in sub directive
I have two directives, one is a child, one is a parent. The issue is, I what the child to only catch an event of the parent directive. Here is what I need:
I have some check boxes and a select all button for a group of check boxes. When I click the "select all" button, I want it to select all the boxes. This part I have working. The catch is I have two instances of this on the page. Right now when I click "select all", all of the check boxes on the page are selected, not just the ones inside the directive instance. I'm sure this is a scope problem... but I'm not sure what. Here is my code:
HTML:
<div all-checkboxes-broadcast>
<div all-checkboxes-listener>
<input type="checkbox" />
</div>
<a ng-click="checkAll()" href="">Select All</a> <!-- this should ONLY check the boxes above, not the ones below. Currently clicking either select checks all the boxes on the page.-->
</div>
<div all-checkboxes-broadcast>
<div all-checkboxes-listener>
<input type="checkbox" />
</div>
<a ng-click="checkAll()" href="">Select All</a>
</div>
AngularJS:
app.directive('allCheckboxesBroadcast', [function () {
return {
restrict: 'A',
scope: true,
controller: ["$scope",function($scope) {
//select all checkboxes
$scope.checkAll = function () {
$scope.$broadcast('allCheckboxes',true);
};
}]
}
}]);
app.directive('allCheckboxesListener', [function () {
return {
restrict: 'A',
require: '^allCheckboxesBroadcast',
link: function(scope, element, attrs) {
scope.$on('allCheckboxes', function(event, shouldCheckAll) {
element.find('input').prop('checked',shouldCheckAll);
});
}
}
}]);
Edit: I found the answer myself. By adding "scope: true" to the parent directive, it creates a child scope that will prototypically inherit from its parent, which creates the functionality I was looking for. If anyone has a better way to do it, I'm all ears.
I found the answer myself. By adding "scope: true" to the parent directive (I changed my original question to include this edit), it creates a child scope that will prototypically inherit from its parent, which creates the functionality I was looking for. If anyone has a better way to do it, I'm all ears.
Perhaps you need to isolate the scope by adding a parameter in your return object in the allCheckboxesBroadcast directive, eg: scope: {}
Something you might wanna do also is label those directives:
<div all-checkboxes-broadcast="1">
<div all-checkboxes-listener="1">
<input type="checkbox" />
</div>
<a ng-click="checkAll()" href="">Select All</a> <!-- this should ONLY check the boxes above, not the ones below. Currently clicking either select checks all the boxes on the page.-->
</div>
<div all-checkboxes-broadcast="2">
<div all-checkboxes-listener="2">
<input type="checkbox" />
</div>
<a ng-click="checkAll()" href="">Select All</a>
</div>
Then:
app.directive('allCheckboxesBroadcast', [function () {
return {
restrict: 'A',
scope: { bcId: "&allCheckboxesBroadcast" },
controller: ["$scope",function($scope) {
//select all checkboxes
$scope.checkAll = function () {
$scope.$broadcast('allCheckboxes',true, $scope.bcId);
};
}]
}
}]);
app.directive('allCheckboxesListener', [function () {
return {
restrict: 'A',
scope: { bcId: "&allCheckboxesListener" },
require: '^allCheckboxesBroadcast',
link: function(scope, element, attrs) {
scope.$on('allCheckboxes', function(event, shouldCheckAll, id) {
if(id == scope.bcId){
element.find('input').prop('checked',shouldCheckAll);
}
});
}
}
}]);
This is a workaround I am using in one of my modules. If you find better options, let me know.
Update: I fixed your plnkr, took me longer than I thought, I am no angular expert and isolated scopes can mess with my mind still. The main issue was that you didn't use a template so your methods defined in your directives were not accessible in the html. I also replaced the & by = in the scope assignment. I thought & would work but I guess I should read the doc again. Anyway, there it is:
http://plnkr.co/edit/J2qBBj3R0rEkfxgPBE84?p=preview

Angularjs directive - select next element by a class name

I have the following HTML:
<div>
<input type="text" ng-model="search.q" special-input>
<ul class="hidden">...</ul>
<ul class="hidden bonus">...</ul>
</div>
And the following directive:
myApp.directive('specialInput', ['$timeout', function($timeout)
{
return {
link: function(scope, element) {
element.bind('focus', function() {
$timeout(function() {
// Select ul with class bonus
element.parent().find('.bonus').removeClass('hidden');
});
});
}
}
}]);
I want to select the ul.bonus using jqLite but cannot find a way. I tried with .next(".bonus") but the selector is ignored completely and the first ul is selected. Does anyone have an idea why I can't do this?
P.S. I'm just relying on AngularJS internal jqLite without jQuery.
Thanks!
you will not need a directive to achieve this:
<div>
<input type="text"
ng-model="search.q"
ng-focus="bonus=true"
ng-blur="bonus=false">
<ul class="hidden">...</ul>
<ul ng-show="bonus">...</ul>
</div>
if your needs are more complex put the decision about the bonus state in your controller.

How to use binding in directive?

In my ng-repeat I have a directive called update which takes the current index of repeat. How can I pass index value to my directive ?
This is how my markup looks like:
<ul>
<li ng-repeat="article in articles">
<span class="btn" update="{{ $index }}">update</span>
<span class="btn" ng-attr-update="{{ $index }}">update</span>
</li>
</ul>
Directive:
angular.module('magazine')
.directive('update', function() {
return {
restrict: 'A', // restricting it only to attributes
link: function(scope, element, attrs) {
console.log(attrs.update);
}
}
})
When I run the above code it logs undefined. Angular docs on directive (http://docs.angularjs.org/guide/directive) says that using ng-attr as a prefix to an attribute does the job. But its not happening. I checked my DOM, when I use ng-attr-<directive>="{{ $index }}" as a prefix to an attribute it does not compile it to only <directive>="value".
Is there something I am missing or doing it wrong ?

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