Refactor: extract gantt zoom links to a helper.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3756 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/issues_helper.rb

@@ -233,4 +233,26 @@ module IssuesHelper
     end
     export
   end
+
+  def gantt_zoom_link(gantt, in_or_out)
+    case in_or_out
+    when :in
+      if gantt.zoom < 4
+        link_to_remote(image_tag('zoom_in.png'),
+                       {:url => gantt.params.merge(:zoom => (gantt.zoom+1)), :update => 'content'},
+                       {:href => url_for(gantt.params.merge(:zoom => (gantt.zoom+1)))})
+      else
+        image_tag('zoom_in_g.png')
+      end
+      
+    when :out
+      if gantt.zoom > 1
+        link_to_remote(image_tag('zoom_out.png'),
+                       {:url => gantt.params.merge(:zoom => (gantt.zoom-1)), :update => 'content'},
+                       {:href => url_for(gantt.params.merge(:zoom => (gantt.zoom-1)))})
+      else
+        image_tag('zoom_out_g.png')
+      end
+    end
+  end
 end

app/views/gantts/show.html.erb

@@ -9,16 +9,8 @@
 </fieldset>
 
 <p style="float:right;">
-<%= if @gantt.zoom < 4
+  <%= gantt_zoom_link(@gantt, :in) %>
-    link_to_remote image_tag('zoom_in.png'), {:url => @gantt.params.merge(:zoom => (@gantt.zoom+1)), :update => 'content'}, {:href => url_for(@gantt.params.merge(:zoom => (@gantt.zoom+1)))}
+  <%= gantt_zoom_link(@gantt, :out) %>
-  else
-    image_tag 'zoom_in_g.png'
-  end %>
-<%= if @gantt.zoom > 1
-    link_to_remote image_tag('zoom_out.png'), {:url => @gantt.params.merge(:zoom => (@gantt.zoom-1)), :update => 'content'}, {:href => url_for(@gantt.params.merge(:zoom => (@gantt.zoom-1)))}
-  else
-    image_tag 'zoom_out_g.png'
-  end %>
 </p>
 
 <p class="buttons">