I am using an external toolbar in a jQuery Mobile site I'm working on. I initialize it like so:
$(document).ready(function () {
$("[data-role='header'], [data-role='footer']").toolbar();
});
I have a couple of buttons in the toolbar and want to disable them during page transitions so users don't click them multiple times which seems to get the framework into a weird state. My first attempt has been to listen for the pagebeforeshow and pageshow events to programmatically disable and enable the buttons:
$(function() {
$("[data-role='header'], [data-role='footer']").toolbar({
create: function (event, ui) {
$(document).on('pagebeforeshow', function () {
$('#page-header .ui-btn').button('disable');
});
$(document).on('pageshow', function () {
$('#page-header .ui-btn').button('enable');
});
}
});
});
I have the code nested inside like that because I don't want to register the handlers until the toolbar has been initialized. However, I'm running into a separate problem:
Uncaught Error: cannot call methods on button prior to initialization; attempted to call method 'disable'
Since I'm not explicitly initializing the buttons myself, I'm not sure I understand how / where I can wait for them to be initialized.
Is there a better approach to this, and does anyone have any suggestions to get this working?
Use .button() on input with type button, reset and submit. For anchor or button tag you need to add / remove ui-state-disabled class.
$(document).on("pagecontainerbeforehide", function () {
$('#page-header .ui-btn').addClass('ui-state-disabled');
});
$(document).on("pagecontainershow", function () {
$('#page-header .ui-btn').removeClass('ui-state-disabled');
});
Demo
Related
I'm trying to stop jQuery Mobile hiding the loading spinner when changePage is called.
The program flow goes like this, starting with clicking a link, which has its click event defined like this:
$('body').delegate('.library-link', 'click', function() {
$.mobile.loading( 'show' );
$.mobile.changePage($('#page-library'));
return false;
});
Upon clicking the link, the pagebeforeshow event is fired, which triggers a function to populate the page from the local storage, or else make an ajax call to get the data.
$(document).on('pagebeforeshow', '#page-library', function(event){
ui.populate_data();
});
In ui.populate_data() we get the data from local storage or make an ajax call.
ui.populate_data = function() {
if (localdata) {
// populate some ui on the page
$.mobile.loading( 'hide' );
} else {
// make an ajax call
}
};
If the data is there, we load the data into the container and hide the loading spinner. If not it makes the ajax call, which on complete saves the data in local storage, and calls ui.populate_data()
The problem is, after the pagebeforeshow event is finished, changePage is calling $.mobile.loading( 'hide' ), even though the data might not be there yet. I can't find any way to prevent changePage from hiding the spinner, other than by temporarily redefining $.mobile.loading, which feels pretty wrong:
$('body').delegate('.library-link', 'click', function() {
$.mobile.loading( 'show' );
loading_fn = $.mobile.loading;
$.mobile.loading = function() { return; };
$.mobile.changePage($('#page-library'), {showLoadMsg: false});
return false;
});
and before hiding the spinner in my ui function:
ui.populate_data = function() {
if (localdata) {
// populate some ui on the page
if (typeof loading_fn === 'function') {
$.mobile.loading = loading_fn;
}
$.mobile.loading( 'hide' );
} else {
// make an ajax call
}
};
Surely there must be a way to get complete control over the showing and hiding of the loading widget, but I can't find it. I tried passing {showLoadMsg: false} to changePage, but as suggested by the docs it only does things when loading pages over ajax, which I'm not doing.
Maybe it's too much for many, but I found a solution other than the written in the comments (which didn't work for me).
I use the jquery mobile router and in the 'show' event of a page, I do $.mobile.loading("show");, so when the page appears it does with the loading spinner showing.
Though to hide the spinner, I had to use $('.ui-loader').hide();, which is weird, I know...
I use Jquery Mobile Router for a lot more, but it solved this issue.
(Maybe just listening to the proper event and triggering the spinner would also work, as this is what JQMR does...)
I'm using JQM 1.4.2...
I have a page on which I am loading a select tag with options that I am getting from an ajax call to a service. It is working just fine and loading the select tag correctly. I only want this loading to happen once when the user first arrives at the page so I put the call to the function that does this inside the $(document).ready(function call. The problem that I am seeing is that when the user selects one of the options and then clicks a button under certain circumstances I pop a dialog (jQuery UI) telling them they need to take a certain action. The first time this happen and only the first time the selected option is getting reset somehow to the first option in the list. I ran in debug many times and discovered that if this is the first time on the page the selector is loaded on arrival at the page as is expected but if the dialog gets popped it is loaded again - only the first time - after that if the dialog gets popped the reload does not occur and all is well. The abbreviated code:
$(document).ready(function () {
$.fn.LoadStuff();
});
jQuery.fn.LoadStuff = function () {
//load up the select tag with options
};
LoadStuff does not get called anywhere else. selOffers is the select tag and dvConflict is the dialog. They are not sharing a common parent div.
<select id="selOffers"></select>
<div id="dvConflict"><div id="dvConflictMsg" /></div>
jQuery for the dialog:
var optSave = {
width: 400,
modal: true,
resizable: false,
draggable: false,
closeOnEscape: true,
zIndex: 1320,
buttons: [
{
text: 'Ok',
click: function () {
$(this).dialog('close');
}
}
]
}
$(".ui-dialog-titlebar").hide(); //Hides the title
$('#dvConflict').css('background', 'none'); //Takes out our custom background
$('#dvConflict').dialog(optSave);
EDIT: Two things
Use $.LoadStuff = function () { } instead of $.fn.LoadStuff = function () {...}. The first is to be called at any context via $.LoadStuff();. The latter is to be used on an element-selection, like $("div.to-load").LoadStuff();.
$(document).ready is fired every time the DOM finishes loading. In some AJAX calls, you could be reloading parts of your DOM, or an internal frame (I don't know, though I don't have your code).
The following code sample will help you bypass the problem:
var first = true;
$(document).ready(function () {
if (first) $.LoadStufF();
...
first = false;
}
When opening a dialog, make sure there are no <script> tags inside the dialog-wrapped element. Say you have the code line:
$('#dialoged').dialog({ ... });
So a bad practice is to have:
<div id="dialoged">
<script>
var first = true;
$(document).ready(function () {
if (first) $.LoadStufF();
...
first = false;
}
</script>
</div>
my mouseleave is not working in my jquery code
http://jsfiddle.net/alano/9Dr7T/29/
providing my js code below
mouseleave: function () {
$(this).find("div:last").remove();
}
The problem isn't with the mouseleave listener, the problem is how you're binding those event handlers and unbinding them for that matter. The div was being removed, but it was being readded with every mouseenter event. For some reason the mouseenter event wasn't being unbound when using the selector filter for .on(). It probably has something to do with the way bubbling occurs when using the selector filter.
When a selector is provided, the event handler is referred to as delegated. The handler is not called when the event occurs directly on the bound element, but only for descendants (inner elements) that match the selector. jQuery bubbles the event from the event target up to the element where the handler is attached (i.e., innermost to outermost element) and runs the handler for any elements along that path matching the selector.
Now, I'm not 100% sure why just yet, but either way it will work if you use directly-bound handlers like so:
$('.specialHover').on({
mouseenter: function() {
$("<div class='cta'>add image</div>").click(function() {
var $me = $(this);
$me.parent().unbind('mouseenter').children('img').attr(
'src',
'http://www.onlinegrocerystore.co.uk/images/goodfood.jpg'
);
$me.remove();
}).appendTo(this);
},
mouseleave: function() {
$(this).find('div:last').remove();
}
});
See: http://jsfiddle.net/9Dr7T/35/
Did you tried this way:
mouseleave: function () {
$("div:last",this).remove();
}
Here's what I want to do:
load basket using Ajax
show "wait" message
once loaded, refresh basket.
When I try to use pageinit function:
$(document).bind('pageinit', function(evt) {
console.log(evt);
}
Console log show it's called 29 times!
Everything is on one HTML page, and I'm using $.mobile.changePage() to change pages. So I tried this hack:
$(document).bind('pagebeforeshow', function(evt, pg) {
if (pg.prevPage.length==0) {
/* first page = code executed once */
var pg = $('#page-basket'),
footer = pg.children( ":jqmData(role=footer)" );
footer.hide().trigger('updatelayout');
AjaxGetBasket( function(data) { console.log('ajax basket ok'); });
}
});
But the layout is never updated.
How shall I do to modify page but only once at the beginning?
Try delegating the pageinit event handler so it only runs when #page-basket is initialized:
$(document).on("pageinit", "#page-basket", function() {
$(this).children(":jqmData(role=footer)").hide().trigger("updatelayout");
AjaxGetBasket(function(data) {
console.log("ajax basket ok");
});
});
I do not understand if your problem is solved, but i am in the same situation explained in the question and i have solved the problem binding a function to pagecreate event:
$(document).bind("pagecreate", function(e){
// call ajax and update the DOM of first 'page'
});
and that's all.
I have been tooling around with this all day and can't figure it out...
I have a list of buttons (utilizing the jQuery UI buttonset() functionality) and I am wanting to keep the ui-active class even after I hover off of a button, but for some reason, jQuery UI functionality keeps removing the class and erases the highlight from the button (this is bad because the user then wouldn't know what button they are on).
Here is the code so far:
function showSection(sectionIndex){
$('.listSection').hide();
$('#listSection' + sectionIndex).show();
$('.listSectionHeader.ui-state-active').each(function(){
$(this).removeClass('ui-state-active');
});
$('#listSectionHeader' + sectionIndex).addClass('ui-state-active');
}
var buttons = $( "#listHeader a" );
$.each(buttons, function(){
$(this).bind('mouseleave.button', function(){
if($(this).hasClass('ui-state-active'))
return;
});
});
Something like this: http://jsfiddle.net/4yamQ/ ? Would require an extra class in the css such as:
ui-state-active,
ui-mycustomclass
{
jquery ui styling...
}