Add a very custom velocity counter to sprints in redmine backlogs plugin master backlog page.

velocity.patch

diff --git a/app/models/rb_sprint.rb b/app/models/rb_sprint.rb
index 3bed08b..4ba4961 100644
--- a/app/models/rb_sprint.rb
+++ b/app/models/rb_sprint.rb
@@ -69,6 +69,24 @@ class RbSprint < Version
     return stories.inject(0){|sum, story| sum + story.story_points.to_i}
   end
 
+  def velocity
+    return unless project.present?
+
+    spent_time = stories.inject(0) { |sum, story|
+      story.time_entries.map(&:hours).sum + sum
+    }
+    done_points = stories.select(&:closed?).
+      inject(0) { |sum, story| story.story_points + sum }
+
+    ratio = if spent_time.zero?
+              0
+            else
+              done_points / spent_time
+            end
+
+    "Spent: #{spent_time}, done: #{done_points}, velocity: #{ratio}"
+  end
+
   def has_wiki_page
     return false if wiki_page_title.blank?
 
diff --git a/app/views/rb_sprints/_sprint.html.erb b/app/views/rb_sprints/_sprint.html.erb
index 8cdcba7..708095b 100644
--- a/app/views/rb_sprints/_sprint.html.erb
+++ b/app/views/rb_sprints/_sprint.html.erb
@@ -7,6 +7,7 @@
   <div class="fff-wrapmiddle">
     <div class="fff-middle">
       <div class="name editable" fieldname="name" fieldlabel="<%=l(:field_name)%>"><%= h sprint.name %></div>
+      <div class="custom-velocity" fieldname="velocity" fieldlabel="<%=l(:field_name)%>"><%= sprint.velocity %></div>
     </div>
   </div>
 
diff --git a/assets/stylesheets/master_backlog.css b/assets/stylesheets/master_backlog.css
index 4131caf..57419ba 100644
--- a/assets/stylesheets/master_backlog.css
+++ b/assets/stylesheets/master_backlog.css
@@ -2,7 +2,7 @@
  * reserved classes are
  * .backlog (used in master_backlog.js to initialize all backlogs)
  * .model (used in backlog.js editable_inplace.js model.js)
- * .sprint (used in backlog.js 
+ * .sprint (used in backlog.js
  * .stories (used in backlog.js for sortable)
  * .editor
  * .editable (bind click on)
@@ -286,7 +286,7 @@ ul li { vertical-align: bottom; } /* close IE7 gap between list items */
 .header .date{
   height:28px;
   line-height:28px;
-  white-space: nowrap; 
+  white-space: nowrap;
   font-size:12px;
 }
 
@@ -710,3 +710,11 @@ ul li { vertical-align: bottom; } /* close IE7 gap between list items */
 
 /* show completed sprints */
 #show_completed_sprints { cursor:pointer; }
+
+.fff-middle div {
+  display: inline-block;
+}
+
+.custom-velocity {
+  margin-left: 20px;
+}