@markd What you could do: when you read the settings read the whole settings file as string and print it out to see how the file content looks like. Just to verify that the stored value is indeed not 0.0

@Dariusz said in QDebug & QFlags - pretty text?: I cant have 100+ flags :- ( Why do you want to have so many flags in one property? "do I need to number each item in my enum 1/2/4/8/16" - yes, if you want to combine several flags in one variable. Flags use OR to set a flag, AND to unset the flag. This is why each flag must have its own bit in a the integer value: // Set flag 0x01 with some other flags already set 01010000 OR 00000001 = 01010001 // Unset same flag keeping other flags 01010001 AND 11111110 = 01010000 "but I'm getting weird flags" - what do you mean by that?

Since you're explicitly calling QDebug operator<<(QDebug &stream, const base &obj) the compiler can't call the other function. What you can do is to write your own "virtual QString debug() const" function in every class which you the call within the debug stream operator function. But once again - plain C++ :)

@Dariusz your signature of the overload isn't correct: see this also make sure those implementations are in the corresponding header file

Found it: https://github.com/qt/qtbase/blob/5.12/src/corelib/global/qlogging.cpp Specifically, I needed to set application name in QCoreApplication.

@Dariusz said in qDebug overload, return non const function?: the virtual QString getDebugData never actually calls the upper inherited classes getDebugData I don't understand - what do you mean here? I don't see that you call the base class implementation in this function anywhere so how should it be called?

correct @Paul-Colby thanks

@VRonin i before write my code to this method 369 book: void WeatherBalloon::sendDatagram() { QByteArray datagram; QDataStream out(&datagram, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_4_3); out << QDateTime::currentDateTime() << temperature() << humidity() << altitude(); udpSocket.writeDatagram(datagram, QHostAddress::LocalHost, 5824); } But we want to connect UDP processing data to GUI app, it can not read QDataStream Method and it Crashs. The app is written in C#,So we should try a method that work with VisualStudio. Agian Than kyou for attention best regards stackprogramer

@kshegunov Thank you! That was the missing part!!

Thanks for the report ! I was thinking more about QTBUG-47316.

@JKSH Yes the value has been initialized. I init. with some minor calculations such as: QVector <double> B; for(int i=1;i<ui->RyadA->text().toInt(0,10)+1;i++){ B.push_back(((double)i/8+1)*(i+1)); }

@SGaist If there is one thing that is for sure; I can destroy any project while doing a "hello world" tutorial! Thanks for the eSupport.

@hskoglund Thanks for the info

Windows? That explains :-) I tested on Linux. I don't know how to fix this on Windows. Maybe this can help you: http://stackoverflow.com/questions/388490/unicode-characters-in-windows-command-line-how

Using QStringList.join you could achieve desired results ; QStringList list = QStringList() << "one" << "two"; qDebug().noquote() << list.join(", "); Playing around with this method quite likely gives you output you are after.

Hi @AnantAgrawal, Just just launch your app from the console. qDebug, qWarning etc. will be printed to the console too (stdout/stderr). Make sure you don't define QT_NO_DEBUG_OUTPUT -- see http://doc.qt.io/qt-5/debug.html for more info.

qDebug().noquote() << QString("I have properly opened file %1").arg(fileName); But please... don't use non-ascii characters in source code. That's just being mean to others.

@raoulh Thank you ...

OK guys, I was able to solve the problem. The Fedora people changed a configuration file, so that qDebug output wasn't shown to the user anymore, until the user changed the settings like described here: https://bugzilla.redhat.com/show_bug.cgi?id=1227295

@_JR_ You're welcome :) Personally I neither had any experience in writing iOS apps nor have the necessary hardware/keys/certificates for that. So any input on the subject will be useful (but I doubt that it will be possible to make any enhancements based on that).