void KNArticleManager::showHdrs(bool clear)
{
  if(!g_roup && !f_older) return;

  bool setFirstChild=true;
  bool showThreads=knGlobals.settings()->showThreads();
  bool expandThreads=knGlobals.settings()->defaultToExpandedThreads();

  if(clear)
    v_iew->clear();

  knGlobals.top->setCursorBusy(true);
  knGlobals.setStatusMsg(i18n(" Creating list..."));
  knGlobals.top->secureProcessEvents();

  if(g_roup) {
    KNRemoteArticle *art, *ref, *current;

    current = static_cast<KNRemoteArticle*>( knGlobals.top->articleViewer()->article() );

    if(current && (current->collection() != g_roup)) {
      current=0;
      knGlobals.top->articleViewer()->setArticle( 0 );
    }

    if(g_roup->isLocked())
      knGlobals.scheduler()->nntpMutex().lock();

    if(f_ilter)
      f_ilter->doFilter(g_roup);
    else
      for(int i=0; i<g_roup->length(); i++) {
        art=g_roup->at(i);
        art->setFilterResult(true);
        art->setFiltered(true);
        ref=(art->idRef()!=0) ? g_roup->byId(art->idRef()) : 0;
        art->setDisplayedReference(ref);
        if(ref)
          ref->setVisibleFollowUps(true);
      }

    d_isableExpander=true;

    for(int i=0; i<g_roup->length(); i++) {

      art=g_roup->at(i);
      art->setThreadMode(showThreads);

      if(showThreads) {
        art->propagateThreadChangedDate();

        if( !art->listItem() && art->filterResult() ) {

          // ### disable delayed header view item creation for now, it breaks
          // the quick search
          // since it doesn't seem to improve performance at all, it probably
          // could be removed entirely (see also slotItemExpanded(), etc.)
          /*if (!expandThreads) {

            if( (ref=art->displayedReference()) ) {

              if( ref->listItem() && ( ref->listItem()->isOpen() || ref->listItem()->childCount()>0 ) ) {
                art->setListItem(new KNHdrViewItem(ref->listItem()));
                art->initListItem();
              }

            }
            else {
              art->setListItem(new KNHdrViewItem(v_iew));
              art->initListItem();
            }

        } else {  // expandThreads == true */
            createThread(art);
            if ( expandThreads )
              art->listItem()->setOpen(true);
//           }

        }
        else if(art->listItem()) {
          art->updateListItem();
          if (expandThreads)
            art->listItem()->setOpen(true);
        }

      }
      else {

        if(!art->listItem() && art->filterResult()) {
          art->setListItem(new KNHdrViewItem(v_iew));
          art->initListItem();
        } else if(art->listItem())
          art->updateListItem();

      }

    }

    if (current && !current->filterResult()) {   // try to find a parent that is visible
      int idRef;
      while (current && !current->filterResult()) {
        idRef=current->idRef();
        if (idRef == -1)
          break;
        current = g_roup->byId(idRef);
      }
    }

    if(current && current->filterResult()) {
      if(!current->listItem())
        createCompleteThread(current);
      v_iew->setActive( current->listItem() );
      setFirstChild=false;
    }

    d_isableExpander=false;

    if (g_roup->isLocked())
      knGlobals.scheduler()->nntpMutex().unlock();
  }

  else { //folder

    KNLocalArticle *art;
    if(f_ilter) {
      f_ilter->doFilter(f_older);
    } else {
      for(int i=0; i<f_older->length(); i++) {
        art=f_older->at(i);
        art->setFilterResult(true);
      }
    }

    for(int idx=0; idx<f_older->length(); idx++) {
      art=f_older->at(idx);

      if(!art->listItem() &&  art->filterResult()) {
        art->setListItem( new KNHdrViewItem(v_iew, art) );
        art->updateListItem();
      } else if(art->listItem())
        art->updateListItem();
    }

  }

  if(setFirstChild && v_iew->firstChild()) {
    v_iew->setCurrentItem(v_iew->firstChild());
    knGlobals.top->articleViewer()->setArticle( 0 );
  }

  knGlobals.setStatusMsg( QString() );
  updateStatusString();
  knGlobals.top->setCursorBusy(false);
}