I'm creating a project using NodeJS, Express and AngularJS that will have a search form (added via custom directive) and a search results that must be loaded only after the search button is pressed.
The problem is that the method I have created inside the controller can't be found from the search form.
Here is a sample of my code:
app.js
(function() {
var app = angular.module('app', ['app-directives']);
app.controller('AppController', function() {
this.buttonClick = function() {
alert('Test');
};
});
})();
directives.js
(function(){
var app = angular.module('app-directives', []);
app.directive('searchForm', function() {
return {
retrict: 'E',
templateUrl: '/partials/search-form.html'
};
});
app.directive('searchResults', function() {
return {
retrict: 'E',
templateUrl: '/partials/search-results.html'
};
});
})();
search-form.html
<input type="text" id="query" />
<button onclick="buttonClick">Search</button>
page-content.html
<section id="mainContent">
<search-form></search-form>
<search-results></search-results>
</section>
UPDATE
The second question will be posted in another thread.
About your first question:
You are using onclick attribute instead angular's 'ng-click' in the button search. This could be the problem. And do not forget to also add the 'ng-app' and 'ng-controller' tags. If not, your method will never be visible.
I also would recommend you to use $scope service instead of 'this' for attaching models and functions you later will use in your views.
Regards
Related
I've been searching for an answer to simple but not trivial question: What is a right way to catch image' onload event in Angular only with jqLite? I found this question , but I want some solution with directives.
So as I said, this is not accepted for me:
.controller("MyCtrl", function($scope){
// ...
img.onload = function () {
// ...
}
because it is in controller, not in directive.
Here's a re-usable directive in the style of angular's inbuilt event handling directives:
angular.module('sbLoad', [])
.directive('sbLoad', ['$parse', function ($parse) {
return {
restrict: 'A',
link: function (scope, elem, attrs) {
var fn = $parse(attrs.sbLoad);
elem.on('load', function (event) {
scope.$apply(function() {
fn(scope, { $event: event });
});
});
}
};
}]);
When the img load event is fired the expression in the sb-load attribute is evaluated in the current scope along with the load event, passed in as $event. Here's how to use it:
HTML
<div ng-controller="MyCtrl">
<img sb-load="onImgLoad($event)">
</div>
JS
.controller("MyCtrl", function($scope){
// ...
$scope.onImgLoad = function (event) {
// ...
}
Note: "sb" is just the prefix I use for my custom directives.
Ok, jqLite' bind method doing well its job. It goes like this:
We are adding directive' name as attribute in our img tag . In my case , after loading and depending on its dimensions , image have to change its class name from "horizontal" to "vertical" , so directive's name will be "orientable" :
<img ng-src="image_path.jpg" class="horizontal" orientable />
And then we are creating simple directive like this:
var app = angular.module('myApp',[]);
app.directive('orientable', function () {
return {
link: function(scope, element, attrs) {
element.bind("load" , function(e){
// success, "onload" catched
// now we can do specific stuff:
if(this.naturalHeight > this.naturalWidth){
this.className = "vertical";
}
});
}
}
});
Example (explicit graphics!): http://jsfiddle.net/5nZYZ/63/
AngularJS V1.7.3 Added the ng-on-xxx directive:
<div ng-controller="MyCtrl">
<img ng-on-load="onImgLoad($event)">
</div>
AngularJS provides specific directives for many events, such as ngClick, so in most cases it is not necessary to use ngOn. However, AngularJS does not support all events and new events might be introduced in later DOM standards.
For more information, see AngularJS ng-on Directive API Reference.
I'm a beginner at AngularJS. As a first project, I'm trying to set up a simple Angular project which integrates Wiris.
Actually seeing and interacting with the plugin is the extent of my progress. My problems begin when I try to get the data in the textarea.
I try using the following approach:
<div ng-model="questionData" id="editorContainer"
style='width:100%; height:500px;'>
Responsible!
</div>
<input type="button" value="Submit" ng-click="postQuestion()" />
headlessQS.controller('wirisController', ['$scope', '$route', '$routeParams', function($scope, $route, $routeParams){
$scope.postQuestion = function(){
// console.log($scope.questionData.wrs_previewImage);
// console.log( angular.element('#editorContainer').val() );
// console.log( $('#editorContainer').val() );
// console.log(angular.element('[id="username"]').val());
// console.log(angular.element('#editorContainer').html);
console.log( angular.element('#editorContainer').val() );
console.log( angular.element('#editorContainer')[0].value );
}
}]);
I tried each one of those console.log statements unsuccessfully but something tells me my general approach is wrong.
I am looking to integrate Wiris with AngularJS2 so that I can retrieve the formula created. How can I do that?
The way to access the MathML markup is via the getMathML() Wiris api function call as shown below:
$scope.postQuestion = function(){
console.log( editor.getMathML() );
}
The ng-model directive does not work with <div> elements.
ERRONEOUS
<div ng-model="questionData" id="editorContainer"
style='width:100%; height:500px;'>
Responsible!
</div>
BETTER
<textarea ng-model="questionData" id="editorContainer"
style='width:100%; height:500px;'>
Responsible!
</textarea>
Integrating ng-model with <div> elements
To integrate ng-model with a <div> element, define a custom directive that works with the ng-model controller:
<div ng-model="questionData" my-editor>
Responsible!
</div>
app.directive("myEditor", function() {
return {
require: "ngModel",
link: postLink
};
function postLink(scope, elem, attrs, ctrl) {
elem.on("keyup", function(ev) {
var keycode = ev.keyCode;
//...
ctrl.$setViewValue(data);
});
ctrl.$render = function() {
var something = $ctrl.$viewValue;
//...
elem.html(something);
};
ctrl.$parsers.push(function(data) {
//...
return data;
});
ctrl.$formatters.push(function(data) {
//...
return data;
});
}
})
For more information, see
AngularJS Developer Guide - Implementing custom form controls (using ngModel)
AngularJS ngModelController API Reference
AngularJS ngModelController API Reference - Custom Control Example
I am looking for a way to obtain an iframe contentWindow object and post a message to it after some action of the user. My current solution does not feel ok with angular at all (especially accessing the DOM from the controller).
I have created a plunker demonstrating the issue:
http://plnkr.co/edit/aXh4jydWGWfK3QQD4edd
Is the a more angular way to execute the postMessage?
controller:
app.controller('Main', function($scope) {
$scope.click = function() {
var iframe = document.getElementById("inner").contentWindow;
iframe.postMessage("Hello iframe", '*');
}
});
html:
<body ng-controller="Main">
<button ng-click="click()">send message</button>
<iframe id="inner" src="inner.html"/>
</body>
I realize your question is over a year old at this point but I've recently had a similar need so I thought I'd post my solution. Originally I had something like you posted but as you pointed out this doesn't feel very "Angular". It's also not easily testable which I supposed is also not very "Angular".
Instead I've refactored my code to implement the iframe as a directive. I then $broadcast() events from my app's controllers and have the directive listen for them. This code can probably be improved quite a bit but it's feels a little more "Angular" and avoids directly touching the DOM.
'use strict';
angular.module('app')
.directive('angularIframe', ['$rootScope', function($rootScope) {
return {
restrict: 'E',
replace: true,
template: '<iframe id="game" src="/iframe/index.html" width="100%" height="100%" frameboarder="0" scrolling="no"></iframe>',
link: function(scope, elem) {
var off = $rootScope.$on('app.postmessage', function(ev, data, targetOrigin) {
var str = JSON.stringify(data);
targetOrigin = targetOrigin || '*';
elem[0].contentWindow.postMessage(str, targetOrigin);
});
// See: http://stackoverflow.com/a/14898795/608884
elem.on('$destroy', function() {
off();
});
}
};
}]);
You can then use this directive by adding <game></game> somewhere in your application.
In a controller you can now broadcast the app.postmessage event along with some data to invoke postMessage() on the iframe:
var myData = { foo: 'bar' };
$rootScope.$broadcast('app.postmessage', myData);
Using Angular, I'm trying to create a directive that will be placed on a button that will launch a search dialog. There are multiple instances of the search button, but obviously I only want a single instance of the dialog. The dialog should be built from a template URL and have it's own controller, but when the user selects an item, the directive will be used to set the value.
Any ideas on how to create the dialog with it's own controller from the directive?
Here's what I've go so far (basically just the directive)...
http://plnkr.co/edit/W9CHO7pfIo9d7KDe3wH6?p=preview
Here is the html from the above plkr...
Find
Here is the code from the above plkr...
var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
var person = {};
person.name = 'World';
$scope.person = person;
$scope.setPerson = function(newPerson) {
person = newPerson;
$scope.person = person;
}
});
app.directive('myFind', function () {
var $dlg; // holds the reference to the dialog. Only 1 per app.
return {
restrict: 'A',
link: function (scope, el, attrs) {
if (!$dlg) {
//todo: create the dialog from a template.
$dlg = true;
}
el.bind('click', function () {
//todo: use the dialog box to search.
// This is just test data to show what I'm trying to accomplish.
alert('Find Person');
var foundPerson = {};
foundPerson.name = 'Brian';
scope.$apply(function () {
scope[attrs.myFind](foundPerson);
});
});
}
}
})
This is as far as I've gotten. I can't quite figure out how to create the dialog using a template inside the directive so it only occurs once and then assign it a controller. I think I can assign the controller inside the template, but first I need to figure out how to load the template and call our custom jQuery plugin to generate the dialog (we have our own look & feel for dialogs).
So I believe the question is, how do I load a template inside of a directive? However, if there is a different way of thinking about this problem, I would be interested in that as well.
I will show you how to do it using bootstrap-ui. (you can modify it easily, if it does not suit your needs).
Here is a skeleton of the template. You can normally bound to any properties and functions that are on directive's scope:
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
... // e.g. <div class="button" ng-click=cancel()></div>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
...
</div>
</div>
</div>
Here is how to create/declare directive in your module:
.directive("searchDialog", function ($modal) {
return {
controller: SearchDialogCtrl,
scope : {
searchDialog: '=' // here you will set two-way data bind with a property from the parent scope
},
link: function (scope, element, attrs) {
element.on("click", function (event) { // when button is clicked we show the dialog
scope.modalInstance = $modal.open({
templateUrl: 'views/search.dialog.tpl.html',
scope: scope // this will pass the isoleted scope of search-dialog to the angular-ui modal
});
scope.$apply();
});
}
}
});
Then controller may look something like that:
function SearchDialogCtrl(dep1, dep2) {
$scope.cancel = function() {
$scope.modalInstance.close(); // the same instance that was created in element.on('click',...)
}
// you can call it from the template: search.dialog.tpl.html
$scope.someFunction = function () { ... }
// it can bind to it in the search.dialog.tpl.html
$scope.someProperty;
...
// this will be two-way bound with some property from the parent field (look below)
// if you want to perform some action on it just use $scope.$watch
$scope.searchDialog;
}
Then it your mark-up you can just use it like that:
<div class="buttonClass" search-dialog="myFieldFromScope">search</div>
I recommend this plugin:
https://github.com/trees4/ng-modal
Demo here:
https://trees4.github.io/ngModal/demo.html
Create a dialog declaratively; and it works with existing controllers. The content of the dialog can be styled however you like.
Using angularjs, if I bind the placeholder of an input to its model, the change event is fired when the document loads in IE. This does not appear to be correct and I'm not seeing this behavior in other browsers.
JS Fiddle
Html:
<div ng-app="angularjs-starter" data-ng-controller="MainCtrl">
<div data-ui-view="viewMain">
<input
placeholder="{{theValue}}"
data-ng-model="theValue"
data-ng-change="valueChanged(theValue)" />
</div>
Javascript:
var app = angular.module('angularjs-starter', []);
app.controller('MainCtrl', function($scope) {
$scope.valueChanged = function(theValue) {
alert("Value Change Called On Load in IE.");
};
});
It's possible to use the built-in ng-attr-placeholder directive as well.
ng-attr-placeholder="{{theValue}}"
I know this is old but just in case anyone else runs in to this I created a small directive that goes around putting a dynamic value in the placeholder and instead have it assign when it changes:
.directive('dynamicPlaceholder',
function() {
return {
restrict: 'A',
link: function ($scope, element, attrs) {
attrs.$observe('dynamicPlaceholder', function(value) {
element.attr('placeholder', value);
});
}
};
});
Then to use this all you need to do is use dynamic-placeholder instead of placeholder:
<input ng-model='someValue' dynamic-placeholder='{{someDynamicPlaceholder}}' />
Not sure what is causing the problem in IE though