protected void handleAdd() {
    ElementListSelectionDialog dialog =
        new ElementListSelectionDialog(getShell(), new StyledBundleLabelProvider(false, false));

    try {
      dialog.setElements(getValidBundles());
    } catch (CoreException e) {
      dialog.setMessage(e.getMessage());
    }

    dialog.setTitle(PDEUIMessages.PluginSelectionDialog_title);
    dialog.setMessage(PDEUIMessages.PluginSelectionDialog_message);
    dialog.setMultipleSelection(true);
    if (dialog.open() == Window.OK) {

      Object[] models = dialog.getResult();
      ArrayList<NameVersionDescriptor> pluginsToAdd = new ArrayList<NameVersionDescriptor>();
      for (int i = 0; i < models.length; i++) {
        BundleInfo desc = ((BundleInfo) models[i]);
        pluginsToAdd.add(new NameVersionDescriptor(desc.getSymbolicName(), null));
      }
      Set<NameVersionDescriptor> allDependencies = new HashSet<NameVersionDescriptor>();
      allDependencies.addAll(pluginsToAdd);
      NameVersionDescriptor[] currentBundles = getTargetDefinition().getImplicitDependencies();
      if (currentBundles != null) {
        allDependencies.addAll(Arrays.asList(currentBundles));
      }
      getTargetDefinition()
          .setImplicitDependencies(
              allDependencies.toArray(new NameVersionDescriptor[allDependencies.size()]));
      fElementViewer.refresh();
      updateImpButtons();
    }
  }
 private void computeSelected(Collection initialSelection) {
   if (initialSelection == null || initialSelection.size() == 0) return;
   Set selected = new HashSet();
   Iterator iter = initialSelection.iterator();
   while (iter.hasNext()) {
     Object obj = iter.next();
     if (obj instanceof IProject) {
       IMonitorModelBase model = MonitorRegistry.findModel((IProject) obj);
       if (model != null) {
         selected.add(model);
       }
     }
   }
   fSelected = (IMonitorModelBase[]) selected.toArray(new IMonitorModelBase[selected.size()]);
 }