@Override
  public void modelChanged(IModelChangedEvent event) {
    if (event.getChangeType() == IModelChangedEvent.WORLD_CHANGED) {
      fHeader = null;
      markStale();
      return;
    }

    if (getExportedPackageHeader().equals(event.getChangedProperty())) {
      refresh();
      // Bug 171896
      // Since the model sends a CHANGE event instead of
      // an INSERT event on the very first addition to the empty table
      // Selection should fire here to take this first insertion into account
      Object lastElement =
          fPackageViewer.getElementAt(fPackageViewer.getTable().getItemCount() - 1);
      if (lastElement != null) {
        fPackageViewer.setSelection(new StructuredSelection(lastElement));
      }

      return;
    }

    Object[] objects = event.getChangedObjects();
    for (Object changedObject : objects) {
      if (changedObject instanceof ExportPackageObject) {
        ExportPackageObject object = (ExportPackageObject) changedObject;
        switch (event.getChangeType()) {
          case IModelChangedEvent.INSERT:
            fPackageViewer.add(object);
            fPackageViewer.setSelection(new StructuredSelection(object), false);
            fPackageViewer.getTable().setFocus();
            break;
          case IModelChangedEvent.REMOVE:
            Table table = fPackageViewer.getTable();
            int index = table.getSelectionIndex();
            fPackageViewer.remove(object);
            table.setSelection(index < table.getItemCount() ? index : table.getItemCount() - 1);
            break;
          default:
            fPackageViewer.refresh(object);
        }
      }
    }
  }