PersistentData: save only if data has changed

src/ATBAPP/support/PersistentData.cpp

@@ -30,8 +30,11 @@ PersistentData::PersistentData(const QString &datafileName, QObject *parent)
 
 void PersistentData::serializeToFile()
 {
+    if (this->isChangedFlag) {
+        qCritical() << "PersistentData::isChanged -> save";
         this->save();
     }
+}
 
 void PersistentData::save()
 {
@@ -44,6 +47,8 @@ void PersistentData::save()
         out << this->hash;
         fileOut.flush();
         fileOut.close();
+
+        this->isChangedFlag = false;
     }
 }