Sorting columns of Tree table structure

Question

Hi ,
We have developed Tree Table structure based on the tutorial, but the data in the columns are not in the right order. Can anyone tell me how to do column sorting for Tree table structure, I know how to do column sorting on normal table structure but that logic does not work for Tree table structures
Appreciate your help
Som

Answer 1

Hi Som,
If you are using TutWD_TreeByNestingTableColumn project as example, this code can help you:
  //@@begin javadoc:onActionSortTree(ServerEvent)
  /** Declared validating event handler. */
  //@@end
  public void onActionSortTree(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    //@@begin onActionSortTree(ServerEvent)
     sort(wdContext.nodeCatalogEntries());
    //@@end
  private void sort(IPrivateTreeTableView.ICatalogEntriesNode catalogEntriesNode) {
       if(null==catalogEntriesNode) return;
     catalogEntriesNode.sortElements(COMPORATOR);
     int size = catalogEntriesNode.size();
     for(int i=0;i<size;i++) {
          sort( catalogEntriesNode.nodeChildCatalogEntries(i) );
  private static final Comparator COMPORATOR = new CatalogEntriesComparator();
  private static class CatalogEntriesComparator implements Comparator {
     public int compare(Object o1, Object o2) {
          IPrivateTreeTableView.ICatalogEntriesElement ot1 = (IPrivateTreeTableView.ICatalogEntriesElement)o1;
          IPrivateTreeTableView.ICatalogEntriesElement ot2 = (IPrivateTreeTableView.ICatalogEntriesElement)o2;
          return Collator.getInstance().compare(     ot1!=null ? ot1.getTITLE() : "",
                                                  ot2!=null ? ot2.getTITLE() : "");
     public boolean equals(Object obj) {
          return false;
Best regards, Maksim Rashchynski.