@IMEventHandler(IMEventType.SHOW_MEMBERS_WINDOW)
  protected void showMembersWindow(IMEvent event) {
    UINamedObject named = (UINamedObject) event.getTarget();
    Window win = event.getData("view");
    Rectangle rect = win.getBounds();
    setLocation(rect.x + rect.width - 30, rect.y + 25);

    setIconImage(named.getIcon());
    setTitle(named.getName());
    this.namedObject = named;

    progressOverlay.setShowLoad(true);
    setVisible(true);

    isLoadFace = true; // 设置允许下载头像

    checkReloadMembers(namedObject); // 显示成员

    win.addComponentListener(
        new ComponentAdapter() {
          @Override
          public void componentMoved(ComponentEvent e) {
            int x = e.getComponent().getX() + e.getComponent().getWidth() - 30;
            int y = e.getComponent().getY() + 25;
            if (isPtInRect(getBounds(), new Point(x, y))) {
              setLocation(x, y);
            }
          }
        });
  }
  private void reloadMembers() {
    GroupMemberListModel model = (GroupMemberListModel) listModels.get(namedObject.getEntity());

    List<? extends QQStranger> members = getMembers();

    if (model == null) {
      model = new GroupMemberListModel(new UserListComparator());
      for (QQStranger m : members) {
        model.addElement(new UserListElement(new UIUser(m)));

        // 下载头像, 只下载一次,后面是手动更新
        if (isLoadFace) {
          IMEventService events = getContext().getSerivce(IMService.Type.EVENT);
          events.broadcast(new IMEvent(IMEventType.USER_FACE_REQUEST, m));
        }
      }
      listModels.put(namedObject.getEntity(), model);
    }

    model.sort(); // 根据状态排序
    membersCount.setText("Members (" + getOnlineCount(members) + "/" + members.size() + ")");
    if (model != memberList.getModel()) {
      memberList.setModel(model);
    }
    model.updateAll();
    // 停止进度条
    progressOverlay.setShowLoad(false);
  }
  /** 成员搜索 content */
  private void initSeacher() {
    final WebPanel headerPl = new WebPanel();
    membersCount = new WebLabel("Members (0/0)");
    membersCount.setMargin(0, 5, 0, 0);
    WebButton searcherBtn =
        WebButton.createIconWebButton(
            IMImageUtil.getScaledInstance(SkinUtils.getImageIcon("searchNormal"), 18, 18),
            StyleConstants.smallRound,
            true);
    final WebTextField seacherTxt = new WebTextField("Find a contact...");
    seacherTxt.setForeground(Color.LIGHT_GRAY);
    seacherTxt.setVisible(false);
    headerPl.add(membersCount, BorderLayout.CENTER);
    headerPl.add(searcherBtn, BorderLayout.LINE_END);
    headerPl.add(seacherTxt, BorderLayout.PAGE_END);

    progressOverlay = new WebProgressOverlay();
    progressOverlay.setComponent(headerPl);
    content.add(progressOverlay, BorderLayout.PAGE_START);
    searcherBtn.addActionListener(
        new ActionListener() {

          @Override
          public void actionPerformed(ActionEvent e) {
            if (!seacherTxt.isVisible()) {
              seacherTxt.setVisible(true);
              headerPl.revalidate();
              headerPl.repaint();
            } else if (seacherTxt.isVisible()) {
              seacherTxt.setVisible(false);
              headerPl.revalidate();
              headerPl.repaint();
            }
          }
        });
    seacherTxt.addFocusListener(
        new FocusListener() {

          @Override
          public void focusLost(FocusEvent e) {
            seacherTxt.setText("Find a contact...");
          }

          @Override
          public void focusGained(FocusEvent e) {
            seacherTxt.setText("");
          }
        });
  }