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Two <select multiple>s with duplicate <option>s

  • joebert
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Post August 18th, 2012, 7:50 am

I'm managing electrical relays. The relays can have "open" and "closed" states. When setting up a new relay I use two <select multiple> HTML elements with duplicate options for "open dependencies" and "closed dependencies".

A relay can not be both open and closed. When I select an option in one of the <select> elements, the corresponding option in the other element should be disabled, and if it's previously been selected it should be de-selected to ensure any browser quirks can't cause inconsistencies in the program.

I'm thinking I should watch the onchange event of both <select> elements and toggle the disabled/selected states, and the application has jQuery available, but it's been awhile since I've worked with dynamic forms, so I'm curious if there's anything new to handle my issue today.
Strong with this one, the sudo is.
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Post August 18th, 2012, 7:50 am

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Post August 18th, 2012, 5:40 pm

can we get some code sample to read over?

or

Developer Duck it
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Post August 18th, 2012, 6:15 pm

Code: [ Select ]
    <legend>Dependencies (open)</legend>
    <select name="dependencies_open[]" multiple="true">
        <?php echo relay::dependency_options(); ?>
    </select>

    <legend>Dependencies (closed)</legend>
    <select name="dependencies_closed[]" multiple="true">
        <?php echo relay::dependency_options(); ?>
    </select>
  1.     <legend>Dependencies (open)</legend>
  2.     <select name="dependencies_open[]" multiple="true">
  3.         <?php echo relay::dependency_options(); ?>
  4.     </select>
  6.     <legend>Dependencies (closed)</legend>
  7.     <select name="dependencies_closed[]" multiple="true">
  8.         <?php echo relay::dependency_options(); ?>
  9.     </select>


When someone selects an item in dependencies_closed[], it should disable and de-select the same option in dependencies_open[], and vice-versa.

When someone de-selects an option in either, it should re-enable, but not re-select the same option in the other.

// Edit -- This appears to work, utilizing jQuery.

Code: [ Select ]
$('select[name^=dependencies_open], select[name^=dependencies_closed]').change(function(){
    var
        change        = $('select[name^=dependencies_' + ($(this).attr('name').indexOf('open') == -1 ? 'open' : 'closed') + ']'),
        selected    = $(this).val() || [];

    change.find('option').removeAttr('disabled');

    if(selected.length > 0)
    {
        change.find('option[value=' + selected.join('], option[value=') + ']').attr('disabled', true);
    }
});
  1. $('select[name^=dependencies_open], select[name^=dependencies_closed]').change(function(){
  2.     var
  3.         change        = $('select[name^=dependencies_' + ($(this).attr('name').indexOf('open') == -1 ? 'open' : 'closed') + ']'),
  4.         selected    = $(this).val() || [];
  6.     change.find('option').removeAttr('disabled');
  8.     if(selected.length > 0)
  9.     {
  10.         change.find('option[value=' + selected.join('], option[value=') + ']').attr('disabled', true);
  11.     }
  12. });
Strong with this one, the sudo is.
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Post August 18th, 2012, 10:06 pm

Quote:
// Edit -- This appears to work, utilizing jQuery.


Did u get it working?
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Post August 18th, 2012, 10:29 pm

Yeppers.
Strong with this one, the sudo is.

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