plugins/piwik/views/piwik_plugin_admin/index.html.erb
<h1><%= _("Piwik plugin settings") %></h1>
<%= form_for(:environment) do |f| %>
<%= labelled_form_field _('Piwik domain'), f.text_field(:piwik_domain, size: 30) %>
<%= labelled_form_field _('Piwik path'), f.text_field(:piwik_path, size: 30) %>
<%= labelled_form_field _('Piwik site id'), f.number_field(:piwik_site_id, size: 3) %>
<%= button_bar do %>
<%= submit_button(:save, c_('Save'), :cancel => {:controller => 'plugins', :action => 'index'}) %>
<% end %>
<% end %>