/**
  * Called if an element inside the form triggers an event. In this particular case clicks on the
  * vertical radio buttons are caught and the user gets notified by his choice.
  *
  * @param ureq
  * @param source
  * @param event
  */
 @Override
 @SuppressWarnings("unused")
 protected void formInnerEvent(
     final UserRequest ureq, final FormItem source, final FormEvent event) {
   if (source == verticalRadioButtons) {
     if (event.wasTriggerdBy(FormEvent.ONCLICK)) {
       final int selectedIndex = verticalRadioButtons.getSelected();
       final String selection = options[selectedIndex];
       showInfo("advanced_form.your_selection_is", selection);
     }
   } else if (source == richTextElement) {
     getWindowControl()
         .setInfo(
             "Wow, you just changed the html editor area. The new content is now: "
                 + richTextElement.getValue());
   }
 }
 /**
  * org.olat.presentation.framework.components.form.flexible.FormItem,
  * org.olat.presentation.framework.components.form.flexible.impl.FormEvent)
  */
 @SuppressWarnings("unused")
 @Override
 protected void formInnerEvent(
     final UserRequest ureq, final FormItem source, final FormEvent event) {
   if (source instanceof FormLink) {
     final FormLink link = (FormLink) source;
     if (link.getName().startsWith(TAG_CMP_IDENTIFIER)) {
       // a tag-Link got clicked, find out which
       final String selectedTag = (String) link.getUserObject();
       if (!selectedTagsList.contains(selectedTag)) {
         selectedTagsList.add(selectedTag);
         tagAllBtn.toggleOff();
         tagNoneBtn.toggleOff();
       } else {
         selectedTagsList.remove(selectedTag);
         if (selectedTagsList.isEmpty()) {
           tagAllBtn.toggleOn();
         }
       }
       filterSettings.setTagFilter(selectedTagsList);
       fireEvent(ureq, new PortfolioFilterChangeEvent(filterSettings));
     } else if (link.getName().startsWith(HANDLER_PREFIX)) {
       // a type-link got clicked
       final String selectedType = (String) link.getUserObject();
       if (!selectedTypeList.contains(selectedType)) {
         selectedTypeList.add(selectedType);
         typeAllBtn.toggleOff();
       } else {
         selectedTypeList.remove(selectedType);
         if (selectedTypeList.isEmpty()) {
           typeAllBtn.toggleOn();
         }
       }
       filterSettings.setTypeFilter(selectedTypeList);
       fireEvent(ureq, new PortfolioFilterChangeEvent(filterSettings));
     }
   }
   if (source == tagAllBtn) {
     resetTagLinks();
     tagNoneBtn.toggleOff();
     filterSettings.setTagFilter(selectedTagsList);
     fireEvent(ureq, new PortfolioFilterChangeEvent(filterSettings));
   } else if (source == tagNoneBtn) {
     resetTagLinks();
     tagAllBtn.toggleOff();
     filterSettings.setNoTagFilter();
     fireEvent(ureq, new PortfolioFilterChangeEvent(filterSettings));
   } else if (source == typeAllBtn) {
     resetTypeLinks();
     filterSettings.setTypeFilter(selectedTypeList);
     fireEvent(ureq, new PortfolioFilterChangeEvent(filterSettings));
   } else if (source == dateStart || source == dateEnd) {
     if (validateFormLogic(ureq)) {
       final List<Date> dateList = new ArrayList<Date>();
       final Date selStartDate = dateStart.getDate();
       final Date selEndDate = dateEnd.getDate();
       dateList.add(selStartDate);
       dateList.add(selEndDate);
       filterSettings.setDateFilter(dateList);
       fireEvent(ureq, new PortfolioFilterChangeEvent(filterSettings));
     }
   } else if (source == typeEditBtn) {
     popupTypesCallout(ureq);
   } else if (source == tagEditBtn) {
     popupTagsCallout(ureq);
   } else if (source == searchFld) {
     final String searchText = searchFld.getValue();
     filterSettings.setTextFilter(searchText);
     fireEvent(ureq, new PortfolioFilterChangeEvent(filterSettings));
   } else if (source == filterSave) {
     if (StringHelper.containsNonWhitespace(filterName.getValue())) {
       final String oldFilterName = filterSettings.getFilterName();
       filterSettings.setFilterName(filterName.getValue());
       filterSettings.setTextFilter(searchFld.getValue());
       if (filterSave.getUserObject() != null && filterName.getValue().equals(oldFilterName)) {
         // fake update, delete before adding again
         final String filterID = (String) filterSave.getUserObject();
         ePFMgr.deleteFilterFromUsersList(getIdentity(), filterID);
       }
       if (!filterName.getValue().equals(oldFilterName) && oldFilterName != null) {
         // set another id, to distinguish from old
         filterSettings.setFilterIdToUniqueId();
       }
       final List<EPFilterSettings> filterList = ePFMgr.getSavedFilterSettings(getIdentity());
       // create a new or insert existing again
       filterList.add(filterSettings);
       ePFMgr.setSavedFilterSettings(getIdentity(), filterList);
       toggleSaveUpdateFilterButtons(true);
       showInfo("filter.saved", filterSettings.getFilterName());
       updateUI(ureq, filterSettings);
     }
   } else if (source == filterDel) {
     if (filterDel.getUserObject() != null) {
       ePFMgr.deleteFilterFromUsersList(getIdentity(), (String) filterDel.getUserObject());
       // refresh ui
       filterName.setValue("");
       toggleSaveUpdateFilterButtons(false);
       showInfo("filter.deleted");
       updateUI(ureq, new EPFilterSettings());
     }
   } else if (source == filterName) {
     final String oldFilterName = filterSettings.getFilterName();
     if (filterSave.getUserObject() != null && !filterName.getValue().equals(oldFilterName)) {
       toggleSaveUpdateFilterButtons(false);
     } else if (filterName.getValue().equals(oldFilterName)) {
       toggleSaveUpdateFilterButtons(true);
     }
   } else if (source == filterSel) {
     if (filterSel.isOneSelected()) {
       final int filterIndex = filterSel.getSelected();
       if (filterIndex == 0) {
         final EPFilterSettings newSettings = new EPFilterSettings();
         updateUI(ureq, newSettings);
         fireEvent(ureq, new PortfolioFilterChangeEvent(newSettings));
       } else if (filterIndex > 0 && filterIndex - 1 < nonEmptyFilters.size()) {
         final EPFilterSettings newSettings = nonEmptyFilters.get(filterIndex - 1);
         if (!filterSettings.getFilterId().equals(newSettings.getFilterId())) {
           updateUI(ureq, newSettings);
           fireEvent(ureq, new PortfolioFilterChangeEvent(newSettings));
         }
       }
     }
   }
 }