设置TableViewer的行高

this.table.addListener(SWT.MeasureItem, new Listener()
  {
   public void handleEvent(Event event)
   {
    event.width = Test.this.table.getGridLineWidth();// 设置宽度
    event.height = (int) Math.floor(event.gc.getFontMetrics()
      .getHeight() * 3);
   }
  });