private MasterView newMasterView() {
   MasterView mv;
   mv = new MasterView();
   mv.setPropertyMapper(new BlocPropertyMapper());
   Column column = new Column("draganddrop", "", false, "10px", true);
   HTML html = new HTML("[drop]");
   if (controller != null) {
     controller.clearRegistration(GROUPNAME);
     controller.registerDrop(html, new BlocClipboard(null), GROUPNAME);
   }
   //      column.setWidget(html);
   if (!isReadOnly()) {
     mv.append(column);
   }
   mv.append(new Column("content", contentColumnName, true));
   if (!isReadOnly()) {
     mv.append(new Column("action", "Supprimer", false, "15px", true));
   }
   mv.setFilteringEnabled(false);
   mv.setWidth("100%");
   return mv;
 }