Redmine

Just done it :

Some addition to app/views/issues/_edit.html.erb (4 first lines are from the original template) :

<% if User.current.allowed_to?(:log_time, @project) %>
        <fieldset class="tabular"><legend><%= l(:button_log_time) %></legend>
        <%= labelled_fields_for :time_entry, @time_entry do |time_entry| %>
        <div class="splitcontentleft">
        <p><%= time_entry.text_field :hours, :size => 6, :label => :label_spent_time %> <%= l(:field_hours) %>
<span> - Last change : </span><span id="time_elapsed_since_last_update"><%= distance_of_time_in_words(Time.now, @issue.updated_on) %></span> <a id="time_elapsed_since_last_update_link" title="Refresh elapsed time" href="#" onclick="reloadTimeElapsedSinceLastUpdate();return false;">(reload)</a>
<script>
hookedShowAndScrollTo = showAndScrollTo;
reloadTimeElapsedSinceLastUpdate= function() { $("#time_elapsed_since_last_update").load('/issues/<%= @issue.id %>.json?key=<%= User.current.api_key %>', function(data){ var json = JSON.parse(data); $("#time_elapsed_since_last_update").text(json.issue["label_updated_time"]); } ); }
showAndScrollTo = function(toShow, toScroll) { reloadTimeElapsedSinceLastUpdate(); hookedShowAndScrollTo(toShow, toScroll); }
</script>

and one line to app/views/issues/show.api.rsb :

 api.label_updated_time distance_of_time_in_words(Time.now, @issue.updated_on)