mokevnin/rails-examples

class StateEventInput < SimpleForm::Inputs::CollectionSelectInput
  def collection
    object.send("state_transitions")
  end

  def input
    label_method = :human_event
    value_method = :event
    current_state = template.content_tag(:div, template.content_tag(:span, "Current state: #{object.human_state_name}", :class => "label label-info")  )

    out = @builder.collection_select(
      attribute_name, collection, value_method, label_method,
      input_options, input_html_options
    )
    (out << current_state).html_safe
  end

  def human_state_name
    template.content_tag(:span, object.human_state_name, class: 'label pull-right')
  end
end