Merge pull request #1051 from slide/master

Allow SCMPollListener subclasses to provide UI elements

core/src/main/java/hudson/triggers/SCMTrigger.java

@@ -74,6 +74,12 @@ import jenkins.model.RunAction2;
 /**
  * {@link Trigger} that checks for SCM updates periodically.
  *
+ * You can add UI elements under the SCM section by creating a
+ * config.jelly or config.groovy in the resources area for
+ * your class that inherits from SCMTrigger and has the 
+ * @{@link hudson.model.Extension} annotation. The UI should 
+ * be wrapped in an f:section element to denote it.
+ *
  * @author Kohsuke Kawaguchi
  */
 public class SCMTrigger extends Trigger<SCMedItem> {

core/src/main/resources/hudson/triggers/SCMTrigger/config.jelly

@@ -30,4 +30,8 @@ THE SOFTWARE.
   <f:entry field="ignorePostCommitHooks" title="${%Ignore post-commit hooks}">
     <f:checkbox />
   </f:entry>
+  <j:invokeStatic var="listeners" method="all" className="hudson.model.listeners.SCMPollListener"/>
+  <j:forEach var="l" items="${listeners}">
+    <st:include page="config" it="${l}" optional="true" />
+  </j:forEach>
 </j:jelly>