//-----------------------------------------------------------------
 public CIconeGantt GetIcone(IElementDeGantt element)
 {
     if (element.EstTermine)
     {
         string strTooltip = "";
         if (Tooltip != null)
         {
             CContexteEvaluationExpression ctx = new CContexteEvaluationExpression(element);
             CResultAErreur result             = Tooltip.Eval(ctx);
             if (result)
             {
                 strTooltip = result.Data.ToString();
             }
         }
         return(new CIconeGantt(Image, strTooltip));
     }
     return(null);
 }