openproject/app/views/my_projects_overviews/_block_textilizable.rhtml

<div id="block_<%= block_name.dasherize %>" class="mypage-box">

  <div style="float:right;margin-right:16px;z-index:500;">
    <%= link_to_remote l(:button_delete), {
          :confirm => l(:label_confirm_delete),
          :url => { :action => "remove_block", :block => block_name },
          :complete => "removeBlock('block_#{block_name.dasherize}')" },
        :class => "close-icon"
        %>
  </div>
  <div style="float:right;margin-right:6px;z-index:500;">
    <a href="#" onclick="$('<%= block_name %>-form-div').toggle(); $('<%= block_name %>-preview-div').toggle(); return false"
       class="preview-or-edit-icon" title="<%= l(:label_toggle_edit_preview) %>"></a>
  </div>

  <div class="handle">
    <div id="<%= block_name %>-form-div" style="display: none">
      <% form_for :overview, @overview,
                  :url => {:action => 'update_custom_element'},
                  :html => {:id => "block_form_#{block_name.dasherize}",
                            :class => nil,
                            :method => :put,
                            :multipart => true} do |f| %>
        <fieldset>
          <%= hidden_field_tag 'block_name', block_name %>
          <%= text_field_tag "block_title_#{block_name}", block_title %>
          <%= text_area_tag "textile_#{block_name}", textile, :cols => 40, :rows => 5, :class => 'wiki-edit' %>
          <%= wikitoolbar_for "textile_#{block_name}" %>
        </fieldset>
        <%= submit_tag l(:button_submit) %>
      <% end %>
    </div>
    <div id="<%= block_name %>-preview-div">
      <%= render :partial => "my_projects_overviews/blocks/textilizable",
                 :locals => { :block_title => block_title,
                              :textile => textile }
            %>
    </div>
  </div>
</div>