Rails: two radio selects on same source list - javascript

Wondering how to approach this... Best to look at the picture to visualize the, hopeful, UI for a form for choosing options in a list. Users need to be able to make a first choice and a second choice for each option. One and only one can be selected in each column, and for that matter, each row.
At first I thought, naturally, 2 radio button groups might work...but not sure how? Perhaps hidden radio_buttons whose values are manipulated via Javascript/JQuery in a click event on each div? Event should also check/handle "collisions" when user tries to select same option for both choices.
Or, would this perhaps be better with two hidden collection_selects...or even simpler, just two hidden text_fields...which javascript can populate with the ID of the selected option?
Or maybe I'm overlooking something more obvious.
I'm new(ish) to javascripting with Rails so looking for advice/validation.
Thanks.

I think something like this is what your looking for:
HTML:
<form>
<p class="exclusiveSelection">
Selection One
<input type="radio" name="firstColumn"/>
<input type="radio" name="secondColumn"/>
</p>
<p class="exclusiveSelection">
Selection Two
<input type="radio" name="firstColumn"/>
<input type="radio" name="secondColumn"/>
</p>
<p class="exclusiveSelection">
Selection Three
<input type="radio" name="firstColumn"/>
<input type="radio" name="secondColumn"/>
</p>
<input type="button" id="submitForm" value="Submit">
</form>
JavaScript:
$(function() {
$(".exclusiveSelection input[type='radio']").click(function() {
$exclusiveSelection = $(this).parent();
$('input[type='radio']', $exclusiveSelection).attr('checked', false);
$(this).attr('checked', true);
});
});
It ensures that the values are unique across column and row and works with jQuery 1.2.6 - 1.7.1. There is also a JSFiddle example.
If you need help adapting this for Rails let me know, however it should be straight forward.

Related

Inserting Handlebars to the DOM in Ember

I am generating a list of checkboxes & radio buttons based on data coming from a server. The page is a Handlebars template using Ember. To generate my list on the page, I am using the following line of code:
document.getElementById('radioList').innerHTML = newHtml;
This works fine if newHtml is set to something like:
<li><input type="radio" id="radio1" name="radio /><label for="radio1">List item one</label></li>
However, I'd like events to be triggered based on these radio buttons (or checkboxes) being selected or unselected - and after some googling, it would seem using Handlebars helpers is the way to go. But when I try to insert the radio button using handlebars, with the newHtml set as such:
<li>{{input type="radio" id="radio1" name="radio }}<label for="radio1">List item one</label></li>
The text just appears rather than a radio button itself. Looking further into this seems to suggest that the Handlebars template I'm inserting into needs recompiled? I may be wrong, but I've spent quite a bit of time searching for answers to this problem and can't seem to find them. Any help would be appreciated!
This may help you to do this with jQuery.
Triggering using button for example
<h2>Click and select radio button</h2>
<input type="button" id="btn" value="Generate"/>
<input type="hidden" value="1" id="hid" />
JQUERY
$("#btn").click(function(){
var generatedradios=$("#hid").val();
var str='<input type="radio" class="generated" data-generated="'+generatedradios+'" id="radio1" name="radio" />';
$("#hid").val(Number(generatedradios)+1);
$("body").append(str);
});
$(document).on("change",".generated",function(){
alert($(this).attr("data-generated"));
});
FIDDLE
http://jsfiddle.net/Isakkiraj/wLg1p8as/

creating quiz jquery, function load options store quiz

code: http://jsfiddle.net/HB8h9/7/
<div id="tab-2" class="tab-content">
<label for="tfq" title="Enter a true or false question">
Enter a Multiple Choice Question
</label> <br />
<textarea name="tfq" rows="3" cols="50"></textarea>
<p>Mark the correct answer</p>
<input type="radio" name="multians" value="A">A)</input>
<input name="Avalue" type="text">
<br>
<input type="radio" name="multians" value="B">B)</input>
<input name="Bvalue" type="text">
<br>
<input type="radio" name="multians" value="C">C)</input>
<input name="Cvalue" type="text">
<br>
<input type="radio" name="multians" value="D">D)</input>
<input name="Dvalue" type="text">
<br>
//different file below used as main page
$(document).ready(function() {
$("#second li ").click(function() {
$("#content").load("file_above.html .tabs");
});
});
trying to create a quiz using div elements from different file containing select option tags. Need to create a function which will load all the "appropriate div tags" according to the selected option and display the dropdown options again after each option has been selected. I'm not sure when to implement submit button either after each question type is loaded or somewhere between 5 - 10 questions. the submit button will "store" the questions selected into a quiz which will later be used for another user to answer.
I hope this makes sense, I'm not too familiar with jquery and any help would be highly appreciated.
Any other techniques which would be better suited are also welcomed.
thanks.
You must set an id to select element and hadle onChange event over this.
Somehting like:
$(document).ready(function(){
$('#selectionId').onChange(function(){
/*load new options into select element*/
$(this).append('option data-tab="tab-6">New option text</option>');
/*displaying desired div. Using HTML5 data attributes as in the fiddle*/
var selected=$(this).attr('data-tab');
if (selected==='tab-1'){
/*load or display tab-1 class div*/
}else...
});
});
You can have various html files with only the corresponding tab to load or in the same file you are defined the select element you can have the tab class divs with visibility attribute set to 'none' and show the targeted div after user selects an option.
Personally, I preferred the last one option.
I hope this fixes your problem
http://jsfiddle.net/r9sv8/
Use the .change() to listen to the options selected and display the div respect to it.
$('.tabs').change(function(){
$('.tabQues').hide('500'); // Hides all the divs
var changeVal = $(this).val(); //Takes the value of the <option>
if(changeVal=="selectOne"){
$('.'+changeVal).show('500'); //show the div you want
}else if(changeVal=="multiple"){
$('.'+changeVal).show('500');
}else if(changeVal=="trueFalse"){
$('.'+changeVal).show('500');
}else if(changeVal=="short"){
$('.'+changeVal).show('500');
}else if(changeVal=="program"){
$('.'+changeVal).show('500');
}else{
$('.tabQues').hide();
}

How to hide checkbox text

I have been playing around with html lately and ran into a slight issue.
Let us say that there is a form with multiple elements on it. Some of those elements are checkboxes, and you want to hide the checkboxs and their corresponding text. How do you do this without hiding the entire form? The following is what I have tried so far:
<input type="checkbox" id=check1 status="display:none">Option 1<br>
But this hides the box and leaves the text "Option 1" still visible. How do I hide the text as well?
I would suggest using the <label>-tag around the whole thing:
<label style="display:none"><input type="checkbox" id="check1">Option 1</label>
This way you can hide the whole line and the user has the advantage that the checkbox toggles, if he clicks the text. You also gain in semantics.
Also note that status is not a valid attribute. For styling use style.
Wrap the input in a div and apply the "style" tag to the div.
<div style="display: none;">
<input type="checkbox" id="check1">Option 1<br>
</div>
you need to wrap it in a span/label and then hide it
<input type="checkbox" id=check1 style="display:none"><label for="check1" style="display:none">Option 1</label><br>
Place checkbox inside div and apply style to div
<div style="display:none"><input type="checkbox" id=check1>Option 1<br></div>
<span style="display:none"><input ...>Option 1</span>
or better
<label for="check1" style="display:none"><input id="check1"...>Option 1</label><br/>
I'm sure you mean style="display:none and not status, but here goes:
Your option text isn't inside the input, nor can it be (for a checkbox), so you'll have to wrap them in a container, then hide the container. Something like:
<div id="checkboxcontainer" style="display: none">
<input type="checkbox" id="check1">
Option 1
<br>
</div>
<input type="checkbox" id="check1" style="display:none">
<label for="check1">Option 1</label><br>
JS:
$('label[for="check1"]').hide();
try something like this
<label style="display:none"><input type="checkbox" id=check1 >Option 1</label>
Use the below to get your desired need.
Wrap the entirety with a label which will then allow you to use style="display:none to hide the label.
<label style="display:none"><input type="checkbox" id="check1">Option 1</label>
You also used status instead of style but by using the code above you'll do fine.
Okay, since the other answers were not that describing i can go ahead and be a little more pedagogic.
First of all, the code you have written is perfectly fine, however you lose some control over your content if it's not wrapped inside a HTML tag.
As all the other answers here wrote, you obviously need a label with your input tag:
<input type="checkbox" id="check1"><label for="check1" >Option 1</label>
You have got some different ways of using labels (which is recommended since this gives you more control over your content). My example above uses the "for" attribute, which is a pointer to the input ID to tell the browser what input field the label is for (quite obvious, eh?). You can also wrap your input inside the label (like all the other answers to this thread), which is the way some people prefers (including me):
<label for="check1"><input type="checkbox" id="check1">Option 1</label>
I saw an answer where the person who wrote some (what he called) JS which is code that hides the label with a wrapped input (i.e. the label AND the input is hidden). However, this was JS that is also using jQuery, so you need to implement that framework before you can use that code snippet:
$('label[for="check1"]').hide(); //This hides the label and the input at the same time if you wrap your input!
I recommend you to use the wrapped version of the markup, and implementing jQuery on your page and thereafter apply the codesnippet that is provided in this answer. That can give you the power to show/hide the inputs + labels on, for example, a click on a button or so. Feel free to ask me anything if you want some guidance. :)
/J.

How to create multiple dropdowns that call different stored procedures with it's previous dropdown selection as an argument?

I have 4 dropdowns. Each dropdown "depends" on the one above it. For example, when a user selects from Dropdown A, Dropdown B needs to call a stored procedure and filter its select options based on what was selected on Dropdown A. Same idea for the rest of the dropdowns. Dropdown C would get filtered based on Dropdown B....
What is the best way to go about this? Examples or any any helpful links would be great! :)
This is for a website that makes use of ASP Classic, HTML, and JavaScript
Thank you!
After I posted my comment, I left the laziness behind and found this: http://www.aspmessageboard.com/showthread.php?181927-Allowing-Autopostback-after-dropdown-selection...
Hope it helps.
With or without apparent postback?
With postback, you have several avenues. You could have each drop-down to post to a different page, or you can have them all post to the same page, and have logic to determine which drop-down posted.
Here's a concept of the the earlier approach:
<script>
function SubmitTo(where) {
alert(where);
f1.action = where + ".asp";
f1.submit();
}
</script>
<form name="f1" method="post">
<select name="a" id="a" onchange="SubmitTo('page1')"><option></option><option>1</option><option>2</option></select>
<br />
<select name="b" id="b" onchange="SubmitTo('page2')"><option></option><option>3</option><option>4</option></select>
<br />
<select name="c" id="c" onchange="SubmitTo('page3')"><option></option><option>5</option><option>6</option></select>
<br />
<select name="d" id="d" onchange="SubmitTo('page4')"><option></option><option>7</option><option>8</option></select>
</form>
Without post back, using AJAX, you do something similar, except that you move the bulding of the result into your browser. Basically you create individual "onChange client-script handlers (or listeners) that do two things: 1. AJAX-call web-server page to retrive the data for the "next" drop down, and 2. When the result comes, "build" the next drop-down.

Swap CSS style of a group of elements on click

I found a thread, Change an element's class with JavaScript, that is along the lines of what I'm going for, but I don't know how to implement it.
I have a page with 4 input buttons and two CSS styles: "Selected" and "notSelected". One button will be hard coded initially as "Selected". When the user clicks another button, I'd like to programatically iterate through all the buttons (the number of buttons on each page will be between 2 and 10), set the clicked button's class to "Selected", and make sure all the other buttons are set to "notSelected".
I've got the logic down, but I've never done anything with JavaScript before, so I haven't the slightest idea about how to do this. If someone knows of a tutorial/piece of code already out there that does this, please point me in the right direction.
Thanks a ton!
You can go the easy way and use a framework like jQuery that does the hard work for you
As you are new to JavaScript, this might be a bit much, but have you considered using jquery? Take a look at toggleClass(): http://api.jquery.com/toggleClass/
Hi just made a quick script, Hope that helps you. Let me know if you find any problem with the script.
I am using focus event and input box, you may change it as needed.
function doSelect( obj ){ var
mylist=document.getElementById("formDiv")
var inputItems=
mylist.getElementsByTagName("input");
for (i=0; i < inputItems.length;
i++){
document.getElementById(inputItems[i].id).className
= "Notselected"; } document.getElementById(obj.id).className
= "selected"; }
Have a form tag within the div tag id="formDIV"
Have few input tags of type text and onfocus="doSelect(this)"
<body> <div
id="formDiv"> <form
name="testform">
<input type="text"
name="tx1"
id="text1"
onfocus="doSelect(this)"/>
<input type="text"
name="tx2"
id="text2"
onfocus="doSelect(this)"/>
<input type="text"
name="tx3"
id="text3"
onfocus="doSelect(this)"/>
<input type="text"
name="tx4"
id="text4"
onfocus="doSelect(this)"/>
<input type="text"
name="tx5"
id="text5"
onfocus="doSelect(this)"/>
</form> </div>
</body>
this should
help.

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