Here you have a working example. drop-downs and row adding.
The javascript is rather easy to understand.
You see the part where the drop-down selects are defined. And that here the codes of the x-axis are "X001", "X002",...
Code:
<script type="text/javascript" charset="utf-8">
$(document).on('ready pjax:scriptcomplete',function(){
var thisQuestion = $('#question{QID}');
// Insert selects
$('.answer-item.answer_cell_X001', thisQuestion).addClass('with-select').append('<select class="inserted-select form-control list-question-select">\
<option value="">Please choose...</option>\
<option value="1">Yes</option>\
<option value="2">No</option>\
<option value="3">Do not know</option>\
</select>');
$('.answer-item.answer_cell_X002', thisQuestion).addClass('with-select').append('<select class="inserted-select form-control list-question-select">\
<option value="">Please choose...</option>\
<option value="1">Red</option>\
<option value="2">Blue</option>\
<option value="3">Pink</option>\
<option value="3">Purple</option>\
</select>');
$('.answer-item.answer_cell_X005', thisQuestion).addClass('with-select').append('<select class="inserted-select form-control list-question-select">\
<option value="">Please choose...</option>\
<option value="1">AAA</option>\
<option value="2">BBB</option>\
<option value="3">Do not know</option>\
</select>');
$('.answer-item.answer_cell_X006', thisQuestion).addClass('with-select').append('<select class="inserted-select form-control list-question-select">\
<option value="">Please choose...</option>\
<option value="1">AAA</option>\
<option value="2">BBB</option>\
<option value="3">Do not know</option>\
</select>');
// Listeners
$('.inserted-select', thisQuestion).on('change', function(i) {
if($(this).val() != '') {
$(this).closest('.answer-item').find('input:text').val($.trim($('option:selected', this).text())).trigger('change');
}
else {
$(this).closest('.answer-item').find('input:text').val('').trigger('change');
}
});
// Returning to page
$('.with-select input:text', thisQuestion).each(function(i) {
var thisCell = $(this).closest('.answer-item');
var inputText = $.trim($(this).val());
var selectval = $('select.inserted-select option', thisCell).filter(function () { return $(this).html() == inputText; }).val();
$('select.inserted-select', thisCell).val(selectval);
});
// Clean-up styles
$('select.inserted-select', thisQuestion).css({
'max-width': '100%'
});
$('.with-select input:text', thisQuestion).css({
'position': 'absolute',
'left': '-9999em'
});
});
$(document).ready(function() {
// A function to add or remove rows of an Array (Multi Flexible)(Text) question
function varLengthArray(qID) {
if ($('#question'+qID+'').length > 0) {
// The HTML content of the Add/Remove elements - modify as you wish
var addContent = '[+]';
var removeContent = '[-]';
// Create the Add and Remove elements & insert them
var el1 = document.createElement('div');
el1.setAttribute('id','addButton'+qID);
document.body.appendChild(el1);
var el2 = document.createElement('div');
el2.setAttribute('id','removeButton'+qID);
document.body.appendChild(el2);
// Move them to after the array
$( 'div#addButton'+qID ).appendTo($( '#question' + qID + ' table.ls-answers' ).parent());
$( 'div#removeButton'+qID ).appendTo($( '#question' + qID + ' table.ls-answers' ).parent());
// Insert their HTML
$( 'div#addButton'+qID ).html( addContent );
$( 'div#removeButton'+qID ).html( removeContent );
// Style the elements - you can modify here if you wish
$( 'div#addButton'+qID ).css({
'margin':'10px 0 0 10px',
'padding':'1px',
'text-align':'center',
'font-weight':'bold',
'width':'auto',
'cursor':'pointer',
'float':'left'
});
$( 'div#removeButton'+qID ).css({
'margin':'10px 0 0 10px',
'padding':'1px',
'text-align':'center',
'font-weight':'bold',
'width':'auto',
'cursor':'pointer',
'float':'left'
});
// Initially hide the Remove element
$( 'div#removeButton'+qID ).hide();
// Call the functions below when clicked
$( 'div#addButton'+qID ).click(function (event) {
addRow(qID);
});
$( 'div#removeButton'+qID ).click(function (event) {
removeRow(qID);
});
// Function to add a row, also shows the Remove element and hides the
//Add element if all rows are shown
function addRow(qID) {
var arrayRow = '#question' + qID + ' table.ls-answers tr.subquestion-list';
var rowCount = $( arrayRow ).size() - 1;
$( arrayRow + '[name="hidden"]:first' ).attr('name', 'visible').show();
$( 'div#removeButton'+qID ).show();
if ( $( arrayRow + ':eq(' + rowCount + ')' ).attr('name') == 'visible' ) {
$( 'div#addButton'+qID ).hide();
}
}
// Function to remove a row, also clears the contents of the removed row,
// shows the Add element if the last row is hidden and hides the Remove
// element if only the first row is shown
function removeRow(qID) {
var arrayRow = '#question' + qID + ' table.ls-answers tr.subquestion-list';
var rowCount = $( arrayRow ).size() - 1;
$( arrayRow + '[name="visible"]:last input[type="text"]' ).val('');
$( arrayRow + '[name="visible"]:last' ).attr('name', 'hidden').hide();
$( 'div#addButton'+qID ).show();
if ( $( arrayRow + ':eq(1)' ).attr('name') == 'hidden' ) {
$( 'div#removeButton'+qID ).hide();
}
}
// Just some initialization stuff
var arrayRow = '#question' + qID + ' table.ls-answers tr.subquestion-list';
var rowCount = '';
// Initially hide all except first row or any rows with populated inputs
$( arrayRow ).each(function(i) {
if ( i > 0 ) {
// We also need to give the hidden rows a name cause IE doesn't
// recognize jQuery :visible selector consistently
$( this ).attr('name', 'hidden').hide();
$('input[type=text]', this).each(function(i) {
if ($(this).attr('value') != '') {
$(this).parents('tbody:eq(0)').attr('name', 'visible').show();
$( 'div#removeButton'+qID ).show();
}
});
rowCount = i;
}
});
}
}
// Call the function with a question ID
varLengthArray(9129);
});
</script>
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