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[EP-tech] Enabling/disabling fields in the workflow using JS

Hi Christopher,

Thanks for your suggestion. I?m a bit more familiar to jQuery than
Prototype, although I think it would be overkill to load jQuery on top of
Prototype just for doing this. I?m sure there is an easier way to fix

Could I pass another option to render_input_field_actual to add the
onclick event to the radio button?


De : Christopher Gutteridge [mailto:cjg at ecs.soton.ac.uk]
Envoy? : 1 ao?t 2017 17:59
? : eprints-tech at ecs.soton.ac.uk; Robin Sylvestre
<robin.sylvestre at polymtl.ca>
Objet : Re: [EP-tech] Enabling/disabling fields in the workflow using JS

If you need jQuery to make life easier;

  <script src="/javascript/jquery.min.js" type="text/javascript">// <!--
No script --></script>
  <script type="text/javascript">$.noConflict();</script>

The second bit is vital or it conflicts with prototype.js which also likes
to use the $ variable and is required for EPrints features.

On 01/08/2017 21:51, Robin Sylvestre wrote:

Hello fellow Eprinters!

I?m trying to enable/disable a date field in the workflow based on the
value of a radio button (value = True or False), using JavaScript. Is
there an easy way to do it?

This page <https://wiki.eprints.org/w/Include_Javascript_in_the_workflow>
contains some clues and I?ve tried adding a render_input option to my
field definition:


  'name' => 'diplome_articles',

  'type' => 'boolean',

  'multiple' => 0,

  'volatile' => 0,

  'input_style' => 'radio',

   'render_input' => sub {

                    my ( $field, $repository, $current_value, $dataset,
$staff, $hidden_fields, $object, $basename ) = @_;

                    my $dom = $field->render_input_field_actual(
$repository, $current_value, $dataset, $staff, $hidden_fields, $object,
$basename );

my $script = $repository->make_javascript('

var buttonOpt = document.getElementById("'.$basename.'");

buttonOpt.addEventListener("click", function(){ alert() });


     my $superdom = $repository->xml->create_element("div");



              return $superdom;



but since both radio buttons (true/false) get the same ID when rendered
by EPrints, using ?getElementById? returns only the first element, thus
only works when the first option is clicked.

>From the console of my browser, I know I can get the value of the selected
option using


but I can?t figure out how to add an event listener for when this value
is changing. Actually, the much, much easier way would be to just add
onclick="function()" to the radio button itself and toggle the date field
accordingly. But is it possible to do it without hacking EPrints too much?

Thanks for your help!!

Robin Sylvestre

Technicien en gestion de l?information num?rique

Services techniques et syst?mes informatis?s

Biblioth?que de l??cole Polytechnique de Montr?al

514-340-4711 poste 3743

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Christopher Gutteridge -- http://users.ecs.soton.ac.uk/cjg

University of Southampton Open Data Service:
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