I've been trying to work out how to get a checked binding to work with Knockout and JQuery Mobile. For some reason the vanilla Knockout JS "checked" binding does not work:
<fieldset data-role="controlgroup">
<legend>Your favorite flavor:legend>
<input type="radio" name="flavor-selection" value="Chocolate" id="flavor-selection-chocolate" data-bind="checked: flavor" />
<label for="flavor-selection-chocolate">Normal</label>
<input type="radio" name="flavor-selection" value="Vanilla" id="flavor-selection-vanilla" data-bind="checked: flavor" />
<label for="flavor-selection-vanilla">Party</label>
</fieldset>
Any ideas why?
It turns out that jQuery Mobile styles the label for the radio button in order to display the radio selection (hiding the actual radio button itself).
I tried the suggestion found here: http://codeclimber.net.nz/archive/2013/08/16/How-to-bind-a-jquery-mobile-radio-button-list-to.aspx but didn't have any success with it - I suspect it might have only worked with a previous version of jQuery Mobile.
Here's my alternative:
Create a custom binding to switch the "ui-radio-on" and "ui-radio-off" classes on the label depending on the checked state of the hidden checkbox:
ko.bindingHandlers.jqMobileRadioChecked = {
init: function (element, valueAccessor, allBindingsAccessor, data, context) {
ko.bindingHandlers.checked.init(element, valueAccessor, allBindingsAccessor, data, context);
},
update: function (element, valueAccessor, allBindingsAccessor, data, context) {
var viewModelValue = valueAccessor();
var viewModelValueUnwrapped = ko.unwrap(viewModelValue);
var $el = $(element);
var $label = $el.siblings("label[for='" + $el.attr("id") + "']");
if (viewModelValueUnwrapped === $el.val()) {
$label.removeClass("ui-radio-off");
$label.addClass("ui-radio-on");
} else {
$label.removeClass("ui-radio-on");
$label.addClass("ui-radio-off");
}
}
};
Then the HTML simply becomes:
<fieldset data-role="controlgroup">
<legend>Your favorite flavor:legend>
<input type="radio" name="flavor-selection" value="Chocolate" id="flavor-selection-chocolate" data-bind="jqMobileRadioChecked: flavor" />
<label for="flavor-selection-chocolate">Normal</label>
<input type="radio" name="flavor-selection" value="Vanilla" id="flavor-selection-vanilla" data-bind="jqMobileRadioChecked: flavor" />
<label for="flavor-selection-vanilla">Party</label>
</fieldset>
Related
I'm using jQuery 1.9.1, jQM 1.3 & knockout 2.2.1.
My html is as follows:
<div data-role="page" id="coloursView">
<div data-role="content">
<fieldset data-role="controlgroup">
<legend>Colour:</legend>
<input type="radio" name="colours" data-bind="checked: colour" id="radio-1" value="1" />
<label for="radio-1">Red</label>
<input type="radio" name="colours" data-bind="checked: colour" id="radio-2" value="2" />
<label for="radio-2">Blue</label>
<input type="radio" name="colours" data-bind="checked: colour" id="radio-3" value="3" />
<label for="radio-3">Green</label>
</fieldset>
</div><!--/content -->
</div><!--/page -->
My view model is also very simple:
function ColoursViewModel() {
this.template = "coloursView";
this.colour = ko.observable("1");
this.label = ko.observable(); // custom binding
}
Now, i would like to get the description of the selected colour, not the value.
It seems to me, that i need a custom binding, like this one:
ko.bindingHandlers.label = {
update: function(element, valueAccessor) {
var value = ko.utils.unwrapObservable(valueAccessor());
$("radio", element).filter(function(el) { return $(el).text() === value; }).prop("checked", "checked");
}
};
But i'm not able to get the text of the related label - the label-for text.
Someone could help?
Thanks in advance
Update
Here is another approach where to find only :checked items and remove white-space in text.
Checkbox
$('input[type=checkbox]').each(function () {
if ($(this).is(':checked')) {
var checkbox = $(this).prev('label').text();
alert('Checkbox: ' + checkbox.replace(/\s+/g, ' '));
}
});
Radio
$('input[type=radio]').each(function () {
if ($(this).is(':checked')) {
var radio = $(this).prev('label').text();
alert('Radio: ' + radio.replace(/\s+/g, ' '));
}
});
Updated Demo
Checkbox
$('div.ui-checkbox').find('span.ui-btn-text').text();
Radio
$('div.ui-radio').find('span.ui-btn-text').text();
Sorry if i answer myself, but i think i got it. At least for radio inputs.
Now, i have a custom binding handler at fieldset level, to keep the markup clean and more readable, as i can:
<fieldset data-role="controlgroup" id="front-colours" data-bind="frontColourLabel: frontColour">
<legend>Front Colour: <span data-bind="text: frontColourDescription"></span> (Value: <span data-bind="text: frontColour"></span>)</legend>
<input type="radio" name="front-colours" data-bind="checked: frontColour" id="fc-radio-1" value="red" />
<label for="fc-radio-1">Red</label>
<input type="radio" name="front-colours" data-bind="checked: frontColour" id="fc-radio-2" value="blue" />
<label for="fc-radio-2">Blue</label>
<input type="radio" name="front-colours" data-bind="checked: frontColour" id="fc-radio-3" value="green" />
<label for="fc-radio-3">Green</label>
</fieldset>
this is the binding handler i come up:
ko.bindingHandlers.frontColourLabel = {
update: function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
ko.utils.unwrapObservable(valueAccessor());
var id = $('input:radio[name='+element.id+']:checked').prop("id");
var radioText = $('label[for=' + id + ']').text();
viewModel.frontColourDescription(radioText);
}
};
the only tricky part here, is that the id of the fieldset is equal to the name of the radio-group, as it's easy to filter out what radio-group i want to address.
WORKING EXAMPLE: http://jsfiddle.net/h7Bmb/1/
I try now to get the checkbox part to work. Someone can help?
I have tried to use knockoutjs template binding to bind fieldsets dynamically which contain group of radio buttons. Here my problem is mobile radio button css not applying for radio buttons. I have searched in stackoverflow I have found issue for button but i didn't find for radio buttons. So can you please find me the solution
<script type="text/x-jquery-tmpl" id="MobileQuestionTemplate">
<div data-role="fieldcontain">
<div class="divborder">
<label id="l2" for="select-choice-1" class="questiontext" data-bind="text: QuestionText"></label>
<br />
<fieldset data-role="controlgroup" data-mini="true" align="center" data- bind="attr: { visible: QuestionType==13,id:QuestionID+'_fld'},template: {name:'MobileOptionTemplate', foreach: OptionList}"></fieldset>
</div>
</div>
</script>
<script type="text/x-jquery-tmpl" id="MobileOptionTemplate">
<input type="radio" data-bind="attr: {id:QuestionID+'_'+OptionID+'_rbt',val:OptionID,name: QuestionID+'_selectedObjects'}"/>
<label data-bind="text: OptionText ,attr: { for: QuestionID+'_'+OptionID+'_rbt'}" />
</script>
<table id="tblMobileMgrQuestions" data-bind="template: {name:'MobileQuestionTemplate', foreach: MobileManagerviewmodel.ManagerQuestions}">
</table>
Can you please tell me where I need to change the code in js to apply css
$.ajax(
{
url: "/Render/LoadSurveyManagerQuestions?surveyGuid=" + surveyGuid + "&surveyItemGuid=" + rsg,
success: function (result)
{
ko.bindingHandlers['button'] =
{
init: function (element, valueAccessor)
{
debugger;
$(element).button(ko.utils.unwrapObservable(valueAccessor()));
}
}
debugger;
var SurveyManagerQuestion = function (managerQuestions)
{
var Self = this;
Self.ManagerQuestions = ko.observableArray(managerQuestions);
Self.AssignQuestionAnswer = function (option)
{
ko.utils.arrayFirst(Self.ManagerQuestions(), function (question)
{
if (question.QuestionID == option.QuestionID)
{
question.OptionId = option.OptionID;
question.OptionText = option.OptionText;
}
});
};
Self.Save = function ()
{
alert('hi');
};
};
debugger;
MobileManagerviewmodel = new SurveyManagerQuestion(result);
ko.applyBindings(MobileManagerviewmodel, document.getElementById("tblMobileMgrQuestions"));
}
});
Thanks for any help in advance.
To enhance the markup of radio buttons dynamically, use the below.
$('input[type=radio]').checkboxradio().trigger('create')
I am using two groups of radio buttons
Group 1:
State
City
Group 2:
A-C
D-H
I-M
N-R
S-Z
When I toggle between state and city, I want A-C from group 2 to be set to checked while the others are set to unchecked.
I have it working in this fiddle here fiddle
HTML:
<div id="sort-radio">
<input type="radio" id="byState" name="sort-radio" checked="checked"/><label for="byState">By State</label>
<input type="radio" id="byCity" name="sort-radio"/><label for="byCity">By City</label>
</div>
<div id="alphabet-radio" style="width:300px;">
<input type="radio" id="A-C" name="alphabet-radio" checked="checked"/>
<label for="A-C">A-C</label>
<input type="radio" id="D-H" name="alphabet-radio"/>
<label for="D-H">D-H</label>
<input type="radio" id="I-M" name="alphabet-radio"/>
<label for="I-M">I-M</label>
<input type="radio" id="N-R" name="alphabet-radio"/>
<label for="N-R">N-R</label>
<input type="radio" id="S-Z" name="alphabet-radio"/>
<label for="S-Z">S-Z</label>
</div>
JavaScript:
$(function () {
$("#sort-radio").buttonset();
});
$(function () {
$("#alphabet-radio").buttonset().find('label').css('width', '19.4%');
});
document.getElementById("byState").addEventListener("click", function () {
document.getElementById("A-C").checked = true;
document.getElementById("D-H").checked = false;
document.getElementById("I-M").checked = false;
document.getElementById("N-R").checked = false;
document.getElementById("S-Z").checked = false;
}, false);
document.getElementById("byCity").addEventListener("click", function () {
document.getElementById("A-C").checked = true;
document.getElementById("D-H").checked = false;
document.getElementById("I-M").checked = false;
document.getElementById("N-R").checked = false;
document.getElementById("S-Z").checked = false;
}, false);
However, when I use this exact code in my website, it does not work (it leaves the previously selected button from group 2 selected). I am using jquery-ui-1.10.1.custom.css which displays the radio buttons nicely, as found here: jquery ui button.
Any clue why this would affect it? When I remove the line <link rel="stylesheet" href="jquery-ui-1.10.1.custom.css" /> from my index.php, it works beautifully.
A few problems:
The button widget works by responding to click events on the radio button's label. This means that the click event you are listening to on the radio buttons themselves won't get fired, since you actually aren't clicking the radio buttons themselves, but their labels. You can work around this by using the change event.
You need to call .buttonset('refresh') after manually updating the checked state of a radio button.
Just setting the checked attribute on one radio button in a group is enough to make the rest become unchecked automatically. You shouldn't need to set the checked property on each one.
You should put your event handlers inside the document.ready handler as well. You can also just use one instead of two.
With all of those things in mind, here are the changes I would make:
$(function () {
$("#sort-radio").buttonset();
$("#alphabet-radio").buttonset().find('label').css('width', '19.4%');
document.getElementById("byState").addEventListener("change", function () {
document.getElementById("A-C").checked = true;
$("#alphabet-radio").buttonset("refresh");
}, false);
document.getElementById("byCity").addEventListener("change", function () {
document.getElementById("A-C").checked = true;
$("#alphabet-radio").buttonset("refresh");
}, false);
});
Example: http://jsfiddle.net/Fzq8L/2/
Since you are using jQuery, you can simplify this a great deal by adding a class to the radio buttons - of which only one can be "set" SO listen to the change event on those. Remove the extra function at the start, pick one of the "array" of buttons to click from the second group. (since only one can be picked)
Simpler version markup :
<div id="sort-radio">
<input type="radio" class="picker" id="byState" name="sort-radio" checked='true'
/>
<label for="byState">By State</label>
<input type="radio" class="picker" id="byCity" name="sort-radio"
/>
<label for="byCity">By City</label>
</div>
<div id="alphabet-radio" style="width:300px;">
<input type="radio" class="secondgroup" id="A-C" name="alphabet-radio"
checked='true' />
<label for="A-C">A-C</label>
<input type="radio" class="secondgroup" id="D-H" name="alphabet-radio"
/>
<label for="D-H">D-H</label>
<input type="radio" class="secondgroup" id="I-M" name="alphabet-radio"
/>
<label for="I-M">I-M</label>
<input type="radio" class="secondgroup" id="N-R" name="alphabet-radio"
/>
<label for="N-R">N-R</label>
<input type="radio" class="secondgroup" id="S-Z" name="alphabet-radio"
/>
<label for="S-Z">S-Z</label>
</div>
Code:
$(document).ready(function () {
$("#sort-radio").buttonset();
$("#alphabet-radio").buttonset().find('label').css('width', '19.4%');
});
$(".picker").change(function () {
$('.secondgroup').eq($('.picker').index(this)).prop("checked", true);
$('#alphabet-radio').buttonset('refresh');
});
Working example:http://jsfiddle.net/MarkSchultheiss/8x28x/2/
Set back second group, first to item when either of first group is changed:
$(document).ready(function () {
$("#sort-radio").buttonset();
$("#alphabet-radio").buttonset().find('label').css('width', '19.4%');
});
$(".picker").change(function () {
$('.secondgroup').eq(0).prop("checked", true);
$("#alphabet-radio").buttonset("refresh");
});
Fiddle for that: http://jsfiddle.net/MarkSchultheiss/8x28x/3/
Ok so this is beginning to drive me insane. I have for several hours now searched and searched, and every single solution doesnt work for me. So yes, this question might be redundant, but i cant for the life of me get solutions to work.
I have a bunch of checkboxes being generated by a jquery template that is databound via knockout.js. However, it turns up unstyled. Afaik, it is something about jquery mobile does the styling before knockout renderes the template, so it ends up unstyled.
I have tried numerous methods to no avail, so i hope someone here can see what i am doing wrong.
(i am using jquery mobile 1.2.0 , jquery 1.8.2 and knockout 2.2.1)
This is the scripts:
<script type="text/javascript">
jQuery.support.cors = true;
var dataFromServer = "";
// create ViewModel with Geography, name, email, frequency and jobtype
var ViewModel = {
email: ko.observable(""),
geographyList: ["Hovedstaden","Sjælland","Fyn + øer","Nordjylland","Midtjylland","Sønderjylland" ],
selectedGeographies: ko.observableArray(dataFromServer.split(",")),
frequencySelection: ko.observable("frequency"),
jobTypes: ["Kontor (administration, sekretær og reception)","Jura","HR, Ledelse, strategi og udvikling","Marketing, kommunikation og PR","Handel og service (butik, service, værtinde og piccoline)","IT","Grafik og design","Lager, chauffør, bud mv.","Økonomi, regnskab og finans","Kundeservice, telefoninterview, salg og telemarketing","Sprog","Øvrige jobtyper"],
selectedJobTypes: ko.observableArray(dataFromServer.split(",")),
workTimes: ["Fulltid","Deltid"],
selectedWorkTimes: ko.observableArray(dataFromServer.split(","))
};
// function for returning checkbox selection as comma separated list
ViewModel.selectedJobTypesDelimited = ko.dependentObservable(function () {
return this.selectedJobTypes().join(",");
}, ViewModel);
var API_URL = "/webapi/api/Subscriptions/";
// function used for parsing json message before sent
function omitKeys(obj, keys) {
var dup = {};
var key;
for (key in obj) {
if (obj.hasOwnProperty(key)) {
if (keys.indexOf(key) === -1) {
dup[key] = obj[key];
}
}
}
return dup;
}
//Function called for inserting new subscription record
function subscribe() {
if($("#jobmailForm").valid()=== true){
//window.alert("add subscriptiooncalled");
var mySubscription = ko.toJS(ViewModel);
//var json = JSON.stringify(mySubscription);
var jsonSmall = JSON.stringify(omitKeys(mySubscription, ['geographyList','jobTypes','selectedJobTypesDelimited','workTimes']));
//window.alert(jsonSmall);
$.ajax({
url: API_URL,
cache: false,
type: 'POST',
contentType: 'application/json',
data: jsonSmall,
success: function (data) {
window.alert("success");
},
error: function (error) {
window.alert("ERROR STATUS: " + error.status + " STATUS TEXT: " + error.statusText);
}
});
}
}
function initializeViewModel() {
// Get the post from the API
var self = this; //Declare observable which will be bind with UI
// Activates knockout.js
ko.applyBindings(ViewModel);
}
// Handle the DOM Ready (Finished Rendering the DOM)
$("#jobmail").live("pageinit", function() {
initializeViewModel();
$('#jobmailDiv').trigger('updatelayout');
});
</script>
<script id="geographyTmpl" type="text/html">
<input type="checkbox" data-role="none" data-bind="attr: { value: $data }, attr: { id: $data }, checked: $root.selectedGeographies" />
<label data-bind="attr: { for: $data }"><span data-bind="text: $data"></span></label>
</script>
<script id="jobTypeTmpl" type="text/html">
<label><input type="checkbox" data-role="none" data-bind="attr: { value: $data }, checked: $root.selectedJobTypes" /><span data-bind="text: $data"></span></label>
</script>
Note, "jobmail" is the surrounding "page" div element, not shown here. And this is the markup:
<div data-role="content">
<umbraco:Item field="bodyText" runat="server"></umbraco:Item>
<form id="jobmailForm" runat="server" data-ajax="false">
<div id="jobmailDiv">
<p>
<label for="email">Email</label>
<input type="text" name="email" id="email" class="required email" data-bind="'value': email" />
</p>
<fieldset data-role="controlgroup" data-mini="true" data-bind="template: { name: 'geographyTmpl', foreach: geographyList, templateOptions: { selections: selectedGeographies } }">
<input type="checkbox" id="lol" />
<label for="lol">fkfkufk</label>
</fieldset>
<fieldset data-role="controlgroup" data-mini="true">
<p data-bind="template: { name: 'jobTypeTmpl', foreach: jobTypes, templateOptions: { selections: selectedJobTypes } }"></p>
</fieldset>
<fieldset data-role="controlgroup" data-mini="true">
<input type="radio" id="frequency5" name="frequency" value="5" data-bind="checked: frequencySelection" /><label for="frequency5">Højst 5 gange om ugen</label>
<input type="radio" id="frequency3" name="frequency" value="3" data-bind="checked: frequencySelection" /><label for="frequency3">Højst 3 gange om ugen</label>
<input type="radio" id="frequency1" name="frequency" value="1" data-bind="checked: frequencySelection" /><label for="frequency1">Højst 1 gang om ugen</label>
</fieldset>
<p>
<input type="button" value="Tilmeld" class="nice small radius action button" onClick="subscribe();">
</p>
Tilbage
</div>
</form>
Alternate method of invoking the restyling (doesnt work either):
$(document).on('pagebeforeshow', '#jobmail', function(){
// Get the post from the API
var self = this; //Declare observable which will be bind with UI
// Activates knockout.js
ko.applyBindings(ViewModel);
});
// Handle the DOM Ready (Finished Rendering the DOM)
$("#jobmail").live("pageinit", function() {
$('#jobmail').trigger('pagecreate');
});
Use a custom binding (Knockout) to trigger jQuery Mobile to enhance the dynamically created content produced by Knockout.
Here is a simple custom binding:
ko.bindingHandlers.jqmEnhance = {
update: function (element, valueAccessor) {
// Get jQuery Mobile to enhance elements within this element
$(element).trigger("create");
}
};
Use the custom binding in your HTML like this, where myValue is the part of your view model that changes, triggering the dynamic content to be inserted into the DOM:
<div data-bind="jqmEnhance: myValue">
<span data-bind="text: someProperty"></span>
My Button
<input type="radio" id="my-id" name="my-name" value="1" data-bind="checked: someOtherProperty" /><label for="my-id">My Label</label>
</div>
In my own case, myValue was part of an expression in an if binding, which would trigger content to be added to the DOM.
<!-- ko if: myValue -->
<span data-bind="jqmEnhance: myValue">
<!-- My content with data-bind attributes -->
</span>
<!-- /ko -->
Every dynamically generated jQuery Mobile content must be manually enhanced.
It can be done in few ways, but most common one can be done through the jQuery Mobile function .trigger( .
Example:
Enhance only page content
$('#page-id').trigger('create');
Enhance full page (header + content + footer):
$('#page-id').trigger('pagecreate');
If you want to find more about this topic take a look my other ARTICLE, to be more transparent it is my personal blog. Or find it HERE.
I tried this code to achieve what I want to do. It worked when I tried it in my ordinary HTML file, but when I tried it in my JQuery Mobile page, the code did not work well for me. Are there different ways or code to select JQuery Mobile checkboxes?
Here's the code that I tried:
JAVASCRIPT:
<script>
function SetAllCheckBoxes(FormName, FieldName, CheckValue)
{
if(!document.forms[FormName])
return;
var objCheckBoxes = document.forms[FormName].elements[FieldName];
if(!objCheckBoxes)
return;
var countCheckBoxes = objCheckBoxes.length;
if(!countCheckBoxes)
objCheckBoxes.checked = CheckValue;
else
// set the check value for all check boxes
for(var i = 0; i < countCheckBoxes; i++)
objCheckBoxes[i].checked = CheckValue;
}
HTML
<form method="GET" name="myForm" onsubmit="return false;">
<label for="myCheckbox1">
<input type="checkbox" name="myCheckbox" value="1" id="myCheckbox1">
I like Britney Spears
</label>
<br>
<label for="myCheckbox2"><input type="checkbox" name="myCheckbox" value="2" id="myCheckbox2">
I like Hillary Duff
</label>
<br>
<label for="myCheckbox3"><input type="checkbox" name="myCheckbox" value="3" id="myCheckbox3">
I like Mandy Moore
</label>
<br>
<input type="button" onclick="SetAllCheckBoxes('myForm', 'myCheckbox', true);" value="I like them all!">
<input type="button" onclick="SetAllCheckBoxes('myForm', 'myCheckbox', false);" value="I don't like any of them!">
I was not aware that JQuery Mobile's checkboxes need to be refreshed after unchecking/checking them via JQuery or Javascript. Here's the code:
$("input[type='checkbox']").attr("checked",true).checkboxradio("refresh");
http://api.jquerymobile.com/checkboxradio/#method-refresh
Try this:
function SetAllCheckBoxes(FormName, CheckValue){
$.each($("#"+FormName+" input[type=checkbox]"), function(){
$(this).attr("checked",CheckValue).checkboxradio("refresh");
});
}
I removed the FieldName because your function was named SetAllCheckBoxes, just your input fields are the same. You just need tell what's your form and the state of your checkboxes.
To toggle / refresh checkboxes in jquery mobile you need to use .prop, rather than .attr.
$("input[type='checkbox']").prop("checked",true).checkboxradio("refresh");