make the hidden input fire "onchange" so to work with AS#update_columns feature

[clyfe]

When I use a RS column in AS
that trigers updates for other columns in the form via AS#update_column feature,
the other columns don't get updated!

This happens because:

1 ==

The RS helper record_select_field does not put the right "options" (id, classes) on the hidden input field. Example (how it should be):

<%
scope ||= nil
options = active_scaffold_input_options(column, scope).merge(
  :class => 'template-input text-input', :size => 30
)
options[:id] +=  '_select' if options[:id]

hidden_options = active_scaffold_input_options(column, scope)
hidden_options = update_columns_options(column, scope, hidden_options)
hidden_options[:id] +=  '_hidden' if hidden_options[:id]
%>
<dl>
  <dt>
    <label for="<%= active_scaffold_input_options(column, scope)[:id] %>"><%= column.label %></label>
  </dt>
  <dd>

    <%= record_select_field 'template', Project.new,
      {:controller => 'utilisation/projects'}, options, hidden_options %>

The record_select_field helper must be modified to accept extra params. This can be done in an unobtrusive way (using default params). Theese paramse are to be forwarded to JS RecordSelect.Single (so it can set the hidden input field options like (id, class)

2 ==

The hidden input does not fire "onchange" event.
This can be fixed with a this.hidden_input.trigger('change'); (jquery) inside RecordSelect.Single#add.
Because Prototype's Event.fire as of current version only works with custom events we must use this.hidden_input.simulate('change'); via https://github.com/kangax/protolicious/blob/master/event.simulate.js

[vhochstein]

Great, thanks a lot for your explanation. I think I ve understood your request. Would be great if we could first focus on your previous feature concering loading indicators.