Here's what I've made so far:
// somewhere in the page code...
<img alt="" src="images/frame.png" onclick="uploadImage()" />
I have created a jQuery script:
// in the head section of the page...
<script type="text/javascript">
$('#uploadContactImage').dialog({
title: 'Change contact image',
buttons: {
"Upload new image": function() {
$(this).dialog("close");
},
"Remove current image": function() {
$(this).dialog("close");
},
"Cancel": function() {
$(this).dialog("close");
}
}
});
</script>
Finally, I have a javascript file with the empty function:
function uploadImage() {
}
The use case should be: User clicks the image, the dialog pops up. Based on the button the user has clicked, certain functions should be called.
Please note that my image tag is generated through AJAX, i.e. the jQuery script is not connected to it. That's the first problem.
The second problem is that I don't know how to call the jQuery script to actually display the dialog.
The third and the last problem is that I don't know how to handle the choice the user makes.
As you must have concluded by now, I am a complete newbie when it comes to jQuery. Can you help me out to get started? Thanks.
Boris,
This is quite simple to do. Firstly, I would not use an onClick event as jQuery has much better ways to manage this. Instead, it should look as follows:
HTML:
<img alt="" src="images/frame.png" id="imageUpload" />
jQuery:
$('img#imageUpload').dialog({
title: 'Change contact image',
buttons: {
"Upload new image": function() {
$(this).dialog("close");
},
"Remove current image": function() {
$(this).dialog("close");
},
"Cancel": function() {
$(this).dialog("close");
}
}
});
First you'll need some hook, or path, to select the image element. Second, since it's added to the page after the document load you'll need to attach the event listener after the response.
select the element
So if you have control of the html returned via ajax add an id to it and select it trivially with jquery:
<img alt="" src="images/frame.png" onclick="uploadImage()" id="pickME" />
...and someplace in the ajax callback...
$("#pickME").click(...
If you can't add the id you'll have to drill down to it by starting from the wrapping element and looking for the img descendant.
attach the event
you can't attach the click event when the document is "ready" because the ajax hasn't inserted it into the document yet. So the thing here is to add the event handler after the img is inserted into the document. So you need to catch that event so you know when its time to add your click event.
ajax(...
success: function(data){
...stuff data into document...
$("#pickME").click(function(){
...attach the dialog to the element...
you might be out of your depth ;-)
Related
I have a button which when clicked the first time it will load another html page.
When it is clicked the second time it will empty a div of the loaded page.
However, for some reason the loaded content keeps reappearing after the second click....
CSS:
#boatdiv {
width: 100%;
}
.clicked {}
HTML
<button id="load"></button>
<div id="boatdiv"></div>
jQuery
$(document).ready(function() {
$.ajaxSetup ({
cache: false
});
var loadURL = "AjaxLoad_injection.html";
$("#load").on("click", function() {
if(!($(this).hasClass("clicked"))){ //checks if button has NOT been clicked
$("#boatdiv").html("<p>loading...</p>").load(loadURL);
}
else {
$("#boatdiv").empty();
}
$("#boatdiv").toggleClass("clicked");
}
);
}); // end ready
What's going on?
You test $(#load) but toggle $("boatdiv").
Try :
$("#load").on("click", function() {
if(!($(this).hasClass("clicked"))){ //checks if button has NOT been clicked
$("#boatdiv").html("<p>loading...</p>").load(loadURL);
}
else {
$("#boatdiv").empty();
}
$(this).toggleClass("clicked");
});
You are toggling class on wrong element. You want it to toggle on the element being clicked. Same as code I gave you in last post.
Simple to walk through it, you are testing this... so need to toglle the class on this
Use
$(this).togglClass('clicked')
Remember that ajax calls are asynchronous. You may be clicking the button a second time before the ajax call has returned.
You could disable the button during the ajax call, like this:
$('#load').on('click', function() {
if (!$(this).hasClass("clicked")) {
$('#load').attr('disabled', true);
$("#boatdiv").html("<p>loading...</p>").load(loadURL, function() {
$('#load').attr('disabled', false);
});
} else {
$('#boatdiv').empty();
}
//$('#boatdiv').toggleClass("clicked");
$('#load').toggleClass("clicked");
});
The button is disabled before the ajax call. A callback function is passed as a second parameter to the "load()" function. It will be called when the ajax call returns. It will re-enable the button.
EDIT: I missed that the wrong element was getting the class toggled, but I still think you want to disable the button during the ajax call or things can get messed up.
I have a single page mark-up with popup divs that contain forms that the user can use to update his/her account information. After form submission the popup closes and the page refreshes showing the updated information that is located within a li (this seems to be working). The problem is, if the user goes back and tries to update again the button within the popup is not submitting.
Thanks in advance for any suggestions!!!
Javascript
$('#updateadmin').click(function() {
var admin = $('#adminform').serializeArray();
/*alert(admin);*/
$.ajax({
type: "POST",
url: 'adminupdate.php',
data: admin,
success: function(data) {
if(data=="success") {
$('#admindiv').popup('close');
$.mobile.changePage('companyinfo.php', {
allowSamePageTransition: true,
transition: 'none',
reloadPage: true,
changeHash: false
});
} else {
$('#adminupdatestatus').html(data).css({color: "red"}).fadeIn(1000);
}
}
});
return false;
});
It sounds like the #updateadmin link/button is located on the page that gets reloaded, if this is the case then you should delegate your event handler so it affects matching elements in the DOM for all time, not just when the code runs.
You would change this:
$('#updateadmin').click(function() {
to this:
$(document).on("click", "#updateadmin", function() {
This works because you're now attaching the event handler to the document element which always exists. When events reach the document element they are checked to see if the element on which they originally fired matches the selector we put as the second argument for .on().
Documentation for .on(): http://api.jquery.com/on
I'm trying to put together a snappy webapp, utilizing JS, Prototype and AJAX for all my requests once the GUI has loaded. The app is simple: A set of links and a container element to display whatever the links point to, just like an iframe. Here's an approximate HTML snippet:
<a class="ajax" href="/somearticle.html">An article</a>
<a class="ajax" href="/anotherarticle.html">Another article</a>
<a class="ajax" href="/someform.html">Some form</a>
<div id="ajax-container"></div>
The JS that accompanies the above (sorry it's a bit lengthy) looks like this:
document.observe('dom:loaded', function(event) {
ajaxifyLinks(document.documentElement);
ajaxifyForms(document.documentElement);
});
function ajaxifyLinks(container) {
container.select('a.ajax').each(function(link) {
link.observe('click', function(event) {
event.stop();
new Ajax.Updater($('ajax-container'), link.href, {
method: 'get',
onSuccess: function(transport) {
// Make sure new ajax-able elements are ajaxified
ajaxifyLinks(container);
ajaxifyForms(container);
}
});
});
});
}
function ajaxifyForms(container) {
console.debug('Notice me');
container.select('form.ajax').each(function(form) {
form.observe('submit', function(event) {
event.stop();
form.request({
onSuccess: function(transport) {
$('ajax-container').update(transport.responseText);
// Make sure new ajax-able elements are ajaxified
ajaxifyLinks(container);
ajaxifyForms(container);
}
});
});
});
}
When clicking a link, the response is displayed in the container. I'm not using an iframe for the container here, because I want whatever elements are on the page to be able to communicate with each other through JS at some point. Now, there is one big problem and one curious phenomenon:
Problem: If a form is returned and displayed in the container, the JS above tries to apply the same behavior to the form, so that whatever response is received after submitting is displayed in the container. This fails, as the submit event is never caught. Why? Note that all returned form elements have the class="ajax" attribute.
Phenomenon: Notice the console.debug() statement in ajaxifyForms(). I expect it to output to the console once after page load and then every time the container is updated with a form. The truth is that the number of outputs to the console seems to double for each time you click a link pointing to a form. Why?
I found another way to achieve what I wanted. In fact, the code for doing so is smaller and is less error prone. Instead of trying to make sure each link and form element on the page is observed at any given time, I utilize event bubbling and listen only to the document itself. Examining each event that bubbles up to it, I can determine whether it is subject for an AJAX request or not. Here's the new JS:
document.observe('submit', function(event) {
if (event.target.hasClassName('ajax')) {
event.stop();
event.target.request({
onSuccess: function(transport) {
$('ajax-container').update(transport.responseText);
}
});
}
});
document.observe('click', function(event) {
if (event.target.hasClassName('ajax')) {
event.stop();
new Ajax.Updater($('ajax-container'), event.target.href, {
method: 'get'
});
}
});
Works like a charm :)
I have a web application that loads javascript on page load:
$(function() {
$('.modal-delete').click(function() {
alert();
});
});
I have a html page with a series of buttons which alert a blank message box when they're clicked:
<button class="modal-delete btn danger"></button>
which works fine.
However, a have some AJAX calls that generate more buttons just like the ones above but NOT on page load! They can be created at any time. These buttons do not do anything but they're meant to load the alerts. They're identical but because they never existed on page load, the Jquery code doesn't work on these buttons. How do I attach the same code to these buttons too?
Many thanks :).
I think you'll want jQuery's 'live()' function:
$('.modal-delete').live('click', function() {
alert();
});
This binds to the elements which match but also rebinds when new elements are added in the future:
"Attach an event handler for all elements which match the current selector, now and in the future"
Change the ready code to this...
$(function() {
$("document").on("click", ".modal-delete", function() {
alert("click");
});
});
There is a link that, when clicked, toggles between loading HTML into a div and emptying the div. When the div is clicked to load the html, I use the jQuery ajax load() function. When the text is loading, I want to display "Please wait...", so I tried using the jQuery ajaxStart() and ajaxStop() methods, but they only seemed to work the first time the load() function was called. So I switched to ajaxSend() and ajaxSuccess, but that also only seems to work the first time the load function is called. What's wrong?
HTML:
<p id="toggleDetail" class="link">Toggle Inspection Detail</p>
<p id="wait"></p>
<div id="inspectionDetail"></div>
jQuery:
$(
function(){
$('#toggleDetail').click(function(){
if($.trim($('#inspectionDetail').text()).length)
{
$('#inspectionDetail').empty();
}
else
{
$('#inspectionDetail').load('srInspectionDetailFiller.cfm');
}
});
}
);
$(
function(){
$('#wait').ajaxSend(function() {
$(this).text('Please wait...');
});
}
);
$(
function(){
$('#wait').ajaxSuccess(function() {
$(this).text('');
});
}
);
You should put up the 'Please wait...' message in your click function, then clear the message upon successful completion of your load:
$('#toggleDetail').click(function(){
if($.trim($('#inspectionDetail').text()).length)
{
$('#inspectionDetail').empty();
}
else
{
$('#wait').text('Please wait...');
$('#inspectionDetail').load('srInspectionDetailFiller.cfm', function() {
$('#wait').text('');
});
}
});
Edit: Although ajaxSend should technically work here, I don't recommend it. With ajaxSend, "All ajaxSend handlers are invoked, regardless of what Ajax request is to be sent". It seem overkill to me to hook all Ajax requests on the page which you're really only trying to deal with this single click.