private void updateSessionData() {
   List<String> watchExpressions = new ArrayList<String>();
   final List<? extends WatchNode> children = myRootNode.getAllChildren();
   if (children != null) {
     for (WatchNode child : children) {
       watchExpressions.add(child.getExpression());
     }
   }
   mySessionData.setWatchExpressions(ArrayUtil.toStringArray(watchExpressions));
 }
  public XWatchesViewImpl(
      @NotNull final XDebugSession session, final @NotNull XDebugSessionData sessionData) {
    mySession = session;
    mySessionData = sessionData;
    myTreePanel =
        new XDebuggerTreePanel(
            session.getProject(),
            session.getDebugProcess().getEditorsProvider(),
            this,
            null,
            XDebuggerActions.WATCHES_TREE_POPUP_GROUP,
            ((XDebugSessionImpl) session).getValueMarkers());

    ActionManager actionManager = ActionManager.getInstance();

    XDebuggerTree tree = myTreePanel.getTree();
    actionManager
        .getAction(XDebuggerActions.XNEW_WATCH)
        .registerCustomShortcutSet(CommonShortcuts.INSERT, tree);
    actionManager
        .getAction(XDebuggerActions.XREMOVE_WATCH)
        .registerCustomShortcutSet(CommonShortcuts.DELETE, tree);

    CustomShortcutSet f2Shortcut = new CustomShortcutSet(KeyStroke.getKeyStroke(KeyEvent.VK_F2, 0));
    actionManager
        .getAction(XDebuggerActions.XEDIT_WATCH)
        .registerCustomShortcutSet(f2Shortcut, tree);

    DnDManager.getInstance().registerTarget(this, tree);
    myRootNode = new WatchesRootNode(tree, session, this, sessionData.getWatchExpressions());
    tree.setRoot(myRootNode, false);

    final ToolbarDecorator decorator =
        ToolbarDecorator.createDecorator(myTreePanel.getTree()).disableUpDownActions();
    decorator.setAddAction(
        new AnActionButtonRunnable() {
          @Override
          public void run(AnActionButton button) {
            executeAction(XDebuggerActions.XNEW_WATCH);
          }
        });
    decorator.setRemoveAction(
        new AnActionButtonRunnable() {
          @Override
          public void run(AnActionButton button) {
            executeAction(XDebuggerActions.XREMOVE_WATCH);
          }
        });
    CustomLineBorder border =
        new CustomLineBorder(
            CaptionPanel.CNT_ACTIVE_BORDER_COLOR,
            SystemInfo.isMac ? 1 : 0,
            0,
            SystemInfo.isMac ? 0 : 1,
            0);
    decorator.setToolbarBorder(border);
    myDecoratedPanel = decorator.createPanel();
    myDecoratedPanel.setBorder(null);

    myTreePanel.getTree().getEmptyText().setText(XDebuggerBundle.message("debugger.no.watches"));
  }