added signal handler 'itemChanged'

src/model/xqviewmodel.cpp

@@ -47,6 +47,12 @@ XQViewModel::XQViewModel( QObject* parent )
 {
   invisibleRootItem()->setData( "[rootItem]", Qt::DisplayRole );
   setItemPrototype( new XQItem );
+
+  connect(this, &QStandardItemModel::itemChanged, this, [](QStandardItem *item)
+  {
+    qDebug() << " --- item changed: " << item->text();
+  });
+
 }
 
 
@@ -175,7 +181,7 @@ void YourClass::onItemChanged(const QModelIndex &topLeft, const QModelIndex &bot
         }
     }
 }
-
+*/
 
 }