code: function handleMouseEnter(e) {
        var cell = _grid.getCellFromEvent(e);
        if (cell) {
          var $node = $(_grid.getCellNode(cell.row, cell.cell));
          var text;
          if ($node.innerWidth() < $node[0].scrollWidth) {
            text = $.trim($node.text());
            if (options.maxToolTipLength && text.length > options.maxToolTipLength) {
              text = text.substr(0, options.maxToolTipLength - 3) + "...";
            }
          } else {
            text = "";
          }
          $node.attr("title", text);
        }
      }
docs: Handle mouse entering grid cell to add/remove tooltip.
  @param {jQuery.Event} e - The event