Develop Reference

JQuery Mobile swipe event only firing every other swipe

I have set up a swipeleft event in my app to move between fields of a form. All of the fields are dynamically generated, so I'm not swapping between pages, I'm clearing and re-generating all the DOM elements. The problem is the swipe event only fires every other time I swipe on the page or if I touch or tap anything on the page.
Here's the code that sets up the events:
$(document).delegate("#scorePage", "pageshow", function() {
$.event.special.swipe.scrollSupressionThreshold = 10;
$.event.special.swipe.horizontalDistanceThreshold = 30;
$.event.special.swipe.durationThreshold = 500;
$.event.special.swipe.verticalDistanceThreshold = 75;
$('#divFoo').on("swipeleft", swipeLeftHandler);
$('#divFoo').on("swiperight", swipeRightHandler);
tableCreate(traits[0].keyboardID);
});
For context, tableCreate is putting a dynamically generated table into divFoo that contains information a user can pick from. Here's the event code itself:
function swipeLeftHandler() {
$("#divFoo").empty();
traitIndex++;
tableCreate(traits[traitIndex].keyboardID);
}
Why is my swipe event only firing every other time there is a swipe on the page?
Primarily testing on Android right now, if that makes a difference.
Edit I'm using JQuery Mobile version 1.4.4

I figured out a way around this problem by simply rolling my own implementation of these events. There's some sample code on how to do something similar here:
https://snipt.net/blackdynamo/swipe-up-and-down-support-for-jquery-mobile/
If anyone else uses this code to fix my same problem, make sure to be aware that the article is implementing swipeup and swipedown so you will have to adapt it. In the end, I'm not entirely sure about the differences between this code and the actual implementations of swipeleft and swiperight, but this works consistently so I'm cutting my losses and going with it.

Update one page with jQuery, in single html file

I've got a single html with 5 pages + navbar. To force a refresh of one page I use this:
$("#page3").on("pagecreate", function(e) {});
It works the first time, but I want it to update every time I visit the page. I know there is .trigger("create"), and "refresh", but I can't get it to work properly...
jQuery Mobile 1.4.0

You need to listen to pageContainer event in order to determine which page is active and accordingly run the functions you want.
The new events can't be attached to a specific page, unlike successor versions of jQuery Mobile. Once an event is occurred, retrieve ActivePage's ID.
$(document).on("pagecontainerbeforeshow", function (e, ui) {
var activePage = $.mobile.pageContainer.pagecontainer("getActivePage")[0].id;
if(activePage == "page3") {
doSomething();
}
});
Demo

Android web view "back" button to load previously loaded div

I will try to explain this as clearly as possible. I have an android app using web view to basically load a webpage as my app. I have everything working great, however the back button seems to be an issue. I have set this page up all on one html page, it will load in a div when certain buttons are clicked to give the feel of a new page without actually having one. I basically want the back button (on the android tablet or smartphone) to load the previously loaded div, but I have no idea where to start with this. Here is what the content switching jquery looks like -
function contentSwitcher(settings){
var settings = {
contentClass : '.contentToLoad',
navigationId : '#sideMenu',
servFront : '#clickHomeHome'
};
//Hide all of the content except the first one on the nav
$(settings.contentClass).not(':first').hide();
$(settings.navigationId).find('li:first').addClass('active');
//onClick set the active state,
//hide the content panels and show the correct one
$(settings.navigationId).find('a').click(function(e){
var contentToShow = $(this).attr('href');
contentToShow = $(contentToShow);
//dissable normal link behaviour
e.preventDefault();
//set the proper active class for active state css
$(settings.navigationId).find('li').removeClass('active');
$(this).parent('li').addClass('active');
//hide the old content and show the new
$(settings.contentClass).hide();
contentToShow.show("slow");
});
}
contentSwitcher();
});
note: I've cropped out a bunch of it just to show how it works on a basic level.
Does anyone have any suggestions as to where to begin. I'd just like the back button function to be able to maybe check a started previous div name stored somewhere and load that.
thanks!

You can try using the History API. There are numerous tutorials on the web e.g. this one is quite good:
http://diveintohtml5.info/history.html
Basically this is how it works. When the user clicks the link for the div to show you push the state to the history stack.
history.pushState({<object with any information about state>}, pageTitle, newUrl);
This will push the state to the history stack meaning that when the user presses the back button on any modern browser like webkit it will take that state into consideration. When back action is taken it will then pop the state from the history stack. This action you have to listen to and handle in any way you see fit:
window.addEventListener("popstate", function(event) {
// event object contains the information from the pushed state
// do whatever needed to load the previous page here
});
The History API requires you to structure your code in a certain way for it to work well. For this I would recommend to use some existing framework that handle the back events for you e.g. Backbone.js. Hope this helps.

Communication between web view and titanium Android app

I have a titanium app where I load a web view. In this web view I load a html5 with a chart.
I want to show a vertical line and get some information about the position of the line. This line will be controlled by a slider in Titanium App, so the line would change its position very fast and very often.
You can see something similar here: graph
In html file, I write the graph and I add a listener for an event. When the event is fired, it draw a line in some position with this code:
function updateVerticalLine(posX) {
drawSeries(c);
c.strokeStyle = '#000000';
c.beginPath();
c.moveTo(getXPixel(posX), graph.height() - yPadding);
c.lineTo(getXPixel(posX), 0);
c.stroke();
}
In Titanium app, I only fire the event when I receive the change slider event and I pass the new position of the line:
slider.addEventListener('change', function(e) {
Ti.App.fireEvent('sliderhtml5line:change', {
value : e.value
});
});
It works ok on ios, but on Android, it is very slow and events are disorganized.
Do you know how I can solve it? Is there any better option for this?
Thanks!!

it should be done the otherway.
when the user changes the slider, you should call the method in the HTML page using the evaljs function to update the user interface directly

The click event is made but it isn't showed in the screen

I'm making a mobile application with phonegap and jquery mobile. Everytime I select one of the menu elements I call to a WS that gives me an answer that I show in the screen. It works perfectly up to there.
As I want to have a better view so I use the code trigger ('create'). (http://jquerymobile.com/demos/1.0a4.1/docs/forms/forms-checkboxes.html but insted of refresh I have to make an create)
var listadohtml = '<div data-role="fieldcontain"><fieldset data-role="controlgroup">';
for (var i=0;i<resultado.length;i++){
var item = '';
var id = resultado[i]['id'];
item += '<input type="checkbox" name="checkbox-'+id+'" id="checkbox-'+id+'" class="custom" />';
item += '<label for="checkbox-'+id+'">'+resultado[i]["title"]+'</label>';
listadohtml += item;
}
listadohtml += '</fieldset></div>';
$('#listaPreguntas').html(listadohtml).trigger('create');
Inmediatly after that I associate an event:
$("#listaPreguntas input[type='checkbox']").bind( "click", function(event, ui) {... some code ...});
It shows everything fine, but the problem is that sometimes (not always, that's the problem) when I click a checkbox the green tick is not shown but the event change is made. When it happens I can see, by clicking in other part of the screen, that I have clicked before because it refreshes and shows the tick.
The conclussions I have
It is not the AVD because im making all the tests in my mobile phone with android 4.0.
It appears that its something of the code that includes jquery mobile when I use de trigger.
I think it is not loading time because I can wait for years and it can happens.
As you can see its not a "logic" problem but a usability one.
Thanks in advance!

For checkbox and radio, use change event not click. And keep in mind that attaching events to dynamic elements is different, I have updated my answer accordingly.
Demo
$(document).on('change', '[type=checkbox]', function () {
// code here
});

If the event click fires every time as expected then try to set the check box checked/unchecked classes using addClass and removeClass in your code pragmatically rather than relying on the JQM.