getDisplay().timerExec(m_headerTooltipDelayMS, new Runnable() {
     public void run() {
        if ((m_lastMousePos_x == x) && (m_lastMousePos_y == y)) {
            showToolTip(item, col, null, new Point(x + 15, y));
            m_tooltipActive = true;
            // Make sure that the tooltip will be hidden after a specified time
            getDisplay().timerExec(m_headerTooltipPresentMS,
                new Runnable() {
                     @Override
                     public void run() {
                         // Make sure the grid has not been disposed since the call
                         if (!isDisposed()) {
                             hideToolTip();
                             m_tooltipActive = false;
                         }
                 }
             });
          }
      }
});