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jQuery Widget Factory access options in a callback method

I'm trying to create a jQuery control using the widget factory. The idea is that I turn a button into a jQuery button, give it an icon, and register the click event for that button such that when invoked, it displays a calendar control on a textbox, whose id is passed in as an option to the widget method:
$.widget("calendarButton", {
options: {
textFieldId: ''
},
_create: function () {
this.element.button(
{
icons: {
primary: "ui-icon-calendar"
}
}).click(function () {
if (this.options.textFieldId != '') {
$(this.options.textFieldId).datetimepicker('show');
return false;
}
});
}
});
The problem with this however, is that this.options is undefined when the click handler is invoked; which makes sense since the method has a different scope. So I tried to see if there is a way to define a "static" variable which then can be accessed inside the callback method. I found this answer that explained how to create variables inside a wrapper function like this:
(function ($) {
var $options = this.options;
$.widget("calendarButton", {
options: {
textFieldId: ''
},
_create: function () {
this.element.button(
{
icons: {
primary: "ui-icon-calendar"
}
}).click(function () {
if ($options.textFieldId != '') {
$($options.textFieldId).datetimepicker('show');
return false;
}
});
}
});
})(jQuery);
But it still reports that $options is undefined. Is there a way to achieve this? I'm trying to avoid requiring the callback function be passed in since it'll be pretty much the same for all instances. Any help is appreciated.

After playing with it for a few hours, I finally came across the jQuery Proxy method which is exactly what I was looking for. I changed the code a little bit to look like this:
$.widget("calendarButton", {
options: {
textFieldId: ''
},
_create: function () {
this.element.button(
{
icons: {
primary: "ui-icon-calendar"
}
}).on("click", $.proxy(this._clickHandler, this));
},
_clickHandler: function () {
if (this.options.textFieldId != '') {
$(this.options.textFieldId).datetimepicker('show');
}
}
});
Notice that instead of implementing the click callback directly, I'm essentially creating a delegate that points to my private _clickHandler function, which itself runs on the same context as the $.widget() method (since the second argument of $.proxy(this._clickHandler, this) returns $.widget()'s context) hence availablity of the options variable inside the method.

Get Component Reference in AuraJS

I'm using jQuery dataTables to display a table. I need to be able to pass a row selection event on to my Aura component that handles the selection and performs some operations on the data from that row.
In the initialize() function:
initialize: function()
{
$("#mytable tbody").click(function(event)
{
$(mytable.fnSettings().aoData).each(function ()
{
$(this.nTr).removeClass('row_selected');
});
$(event.target.parentNode).addClass('row_selected');
});
mytable = $('#mytable').dataTable();
},
I set up the click handler for the row selection, but how do I get a reference to the enclosing component so I can sandbox.emit() function to issue messages? I can put a reference to the component into the Closure, but that essentially makes this component a singleton and I could never have two instances of the component on the page at the same time.
Is there a standard way, using jQuery selectors or some other method, that I can retrieve a reference to the enclosing component from inside the click() handler?
Edit: I should never try to write code until I have had 32oz of caffine. You can pass a reference to the current component via the click() method itself. Like so:
$("#mytable tbody").click(this, function(event)
{
$(mytable.fnSettings().aoData).each(function ()
{
$(this.nTr).removeClass('row_selected');
});
$(event.target.parentNode).addClass('row_selected');
event.data.sandbox.emit('mychannel', {data: 'stuff'});
});

If I understand your question correctly, you could try something like this
initialize: function () {
var that = this;
$("#mytable tbody").click(function(event) {
//have acces to component as 'that'
});
}
what I used for events is view inside component configuration:
View: {
events: {
'click a[data-question-edit-id]': function (e) {
var button = $(e.currentTarget),
id = button.attr('data-question-edit-id'),
examId = this.component.examModel.get('id');
this.sandbox.router.navigate('/exams/' + examId + '/questions/' + id + '/edit', {trigger: true});
},
'click a[data-question-delete-id]': function (e) {
var button = $(e.currentTarget),
id = button.attr('data-question-delete-id');
this.component.showDeleteConfirmation(id);
}
}
}
If you'll find be helpful, here is my repo of aura project I'm working on:
https://github.com/lyubomyr-rudko/aura-test-project

Calling href in Callback function

I have a anchor tag in my page for logout.
<a href="/logout/" id="lnk-log-out" />
Here I am showing a Popup for confirmation with jQuery UI dialog.
If user click Yes from dialog it has to execute the link button's default action, I mean href="/logout".
If No clicked a Popup box should be disappeared.
jQuery Code
$('#lnk-log-out').click(function (event) {
event.preventDefault();
var logOffDialog = $('#user-info-msg-dialog');
logOffDialog.html("Are you sure, do you want to Logout?");
logOffDialog.dialog({
title: "Confirm Logout",
height: 150,
width: 500,
bgiframe: true,
modal: true,
buttons: {
'Yes': function () {
$(this).dialog('close');
return true;
},
'No': function () {
$(this).dialog('close');
return false;
}
}
});
});
});
The problem is I am not able to fire anchor's href when User click YES.
How can we do this?
Edit: Right now I managed in this way
'Yes': function () {
$(this).dialog('close');
window.location.href = $('#lnk-log-out').attr("href");
}

In the anonymous function called when 'Yes' is fired, you want to do the following instead of just returning true:
Grab the href (you can get this easily using $('selector').attr('href');)
Perform your window.location.href to the url you grabbed in point 1
If you want the a tag to just do it's stuff, remove any preventDefault() or stopPropagation(). Here I have provided two different ways :)
Don't use document.location, use window.location.href instead. You can see why here.
Your code in the 'Yes' call should look something like, with your code inserted of course:
'Yes': function () {
// Get url
var href = $('#lnk-log-out').attr('href');
// Go to url
window.location.href = href;
return true; // Not needed
}, ...
Note: Thanks to Anthony in the comments below: use window.location.href = ... instead of window.location.href(), because it's not a function!

I have used this in many of my projects so i suggest window.location.href
'Yes': function () {
$(this).dialog('close');
window.location.href="your url"
return true;
},

Redefining a jQuery dialog button

In our application we use a general function to create jQuery dialogs which contain module-specific content. The custom dialog consists of 3 buttons (Cancel, Save, Apply). Apply does the same as Save but also closes the dialog.
Many modules are still using a custom post instead of an ajax-post. For this reason I'm looking to overwrite/redefine the buttons which are on a specific dialog.
So far I've got the buttons, but I'm unable to do something with them. Is it possible to get the buttons from a dialog (yes, I know) but apply a different function to them?
My code so far:
function OverrideDialogButtonCallbacks(sDialogInstance) {
oButtons = $( '#dialog' ).dialog( 'option', 'buttons' );
console.log(oButtons); // logs the buttons correctly
if(sDialogInstance == 'TestInstance') {
oButtons.Save = function() {
alert('A new callback has been assigned.');
// code for ajax-post will come here.
}
}
}

$('#dialog').dialog({
'buttons' : {
'Save' : {
id:"btn-save", // provide the id, if you want to apply a callback based on id selector
click: function() {
//
},
},
}
});
Did you try this? to override button's callback based on the need.

No need to re-assign at all. Try this.
function OverrideDialogButtonCallbacks(dialogSelector) {
var button = $(dialogSelector + " ~ .ui-dialog-buttonpane")
.find("button:contains('Save')");
button.unbind("click").on("click", function() {
alert("save overriden!");
});
}
Call it like OverrideDialogButtonCallbacks("#dialog");
Working fiddle: http://jsfiddle.net/codovations/yzfVT/

You can get the buttons using $(..).dialog('option', 'buttons'). This returns an array of objects that you can then rewire by searching through them and adjusting the click event:
// Rewire the callback for the first button
var buttons = $('#dialog').dialog('option', 'buttons');
buttons[0].click = function() { alert('Click rewired!'); };
See this fiddle for an example: http://jsfiddle.net/z4TTH/2/
If necessary, you can check the text of the button using button[i].text.
UPDATE:
The buttons option can be one of two forms, one is an array as described above, the other is an object where each property is the name of the button. To rewire the click event in this instance it's necessary to update the buttons option in the dialog:
// Rewire the callback for the OK button
var buttons = $('#dialog').dialog('option', 'buttons');
buttons.Ok = function() { alert('Click rewired!'); };
$('#dialog').dialog('option', 'buttons', buttons);
See this fiddle: http://jsfiddle.net/z4TTH/3/

Can you try binding your new function code with Click event of Save?
if(sDialogInstance == 'TestInstance') {
$('#'+savebtn_id).click(function() {
alert('A new callback has been assigned.');
// code for ajax-post will come here.
});
}

JQuery can't find variable from separate javascript file

I am using the cakephp framework and I created 2 separate javascript files and placed them into my webroot/js folder. The first javascript file contains modal dialog variables that contain the settings for the dialog boxes. The second javascript file contains other click event handlers that post data to an action and then open up the dialog.
The problem I am having is that the second file calls a variable from the first file using
$variablename and I get an error saying varaibleName is not defined.
Some code is below to show you what I mean.
From the first file:
var $editSel = $("#editSel_dialog").dialog(
{
autoOpen: false,
height: 530,
width: 800,
resizable: true,
modal: true,
buttons:
{
"Cancel": function()
{
$(this).dialog("close");
}
}
});
From the second file:
$('.neweditSel_dialog').live('click', function()
{
$.ajaxSetup({ async: false });
var selected = [];
$("#[id*=LocalClocks]").each(function()
{
if(false != $(this).is(':checked'))
{
var string = $(this).attr('id').replace('LocalClocks', '');
string = string.substring(10);
selected.push(string);
}
});
if(0 === selected.length)
{
$selError.dialog('open');
$selError.text('No Local Clocks Were Selected')
}
else
{
$.post('/LocalClocks/editSelected', { "data[Session][selected]": selected }, function(data)
{
});
$editSel.load($(this).attr('href'), function ()
{
$editSel.dialog('open');
});
}
return false;
});
This was working when I was using jquery-1.4.2.min.js, but I am using jquery1.7 now.
I also ended up putting the first file with all the variables inside of $(document).ready(function(){}); I tried putting the second file inside of a document.ready() function but that made no difference.
Any help would be great.
Thanks

You are dealing with an issue in scope. In javascript:
function foo() {
var greet = "hi";
}
function bar() {
console.log(greet); // will throw error
}
However:
var greet;
function foo() {
greet = "hi";
}
function bar() {
console.log(greet); // will log "hi"
}
You must define your variable in a common parent of both functions that need to access it. Unfortunately, since you do not use any modeling convention or framework, that is the window object (why are global variables bad?).
So, you must define var $whateveryouneed before and outside of both $(document).readys.
Also, keep the declaration and definition seperate. Your definition instantiates a jQuery object, so you must encapsulate it inside a $(document).ready() (use $(function() {}) instead):
var $editSel;
$(function () {
$editSel = $("#editSel_dialog").dialog(
{
autoOpen: false,
height: 530,
width: 800,
resizable: true,
modal: true,
buttons:
{
"Cancel": function()
{
$(this).dialog("close");
}
}
});
});

I don't think you can guarantee the order in which handlers will be fired, which means that the document ready may be fired in different order than you expect. Is the variable you are trying to access in the second file a global variable? Try to think about your variables scope as I would have thought this is the issue.

You cannot guarantee that one file will be loaded before the other. And you cannot guarantee that document.ready in one file will fire before the other.
Therefore, I suggest you wrap your code in functions and call them in a single document.ready handler in the order you need.
For example:
function initVariables(){
window.$editSel = ... // your code from the first file here
}
function initHandlers(){
// your code from the second file here
}
And then:
$(document).ready(function() {
initVariables();
initHandlers();
});
You'll notice that I used the global window object to expose your variable. It would be even better if you used a common namespace for them.