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@mganesh This works fine for me. Your output can not match on what you've written. Please post all your test code int main(int argc, char **argv) { QCoreApplication app(argc, argv); QString monitorCommand = "020400000006703B"; QByteArray data_to_transmit = QByteArray::fromHex(monitorCommand.toUtf8()); qDebug() << monitorCommand << data_to_transmit; return 0; } --> "020400000006703B" "\x02\x04\x00\x00\x00\x06p;"

@poucz I would suggest, if you're using QtCreator: Right click in Q_PROPERTY -> Refactor -> Generate Missing Q_PROPERTY members I use it all the time. It won't work for your quite as well, as you have an array as underlying data structure.

@developer_61 So it seems you have a couple of choices. When you change the file from inside your program: Switch off the file notification beforehand, re-enable it afterwards. Note the time at which you perform the internal update. Ignore notification for a period afterwards.

@Christian-Ehrlicher @JonB @J-Hilk @jsulm Thank you for your help. The reason for the slow speed should be the hard disk. The same demo takes about 80 ms for HDD and about 4 ms for SSD.

@jsulm Thanks after reading documentation again, i was able to use QSettings For anyone who needs some idea on using config files below code snippet might help you. ui->pushButton->setVisible(false); QSettings settings("../config/settings.ini",QSettings::IniFormat); QStringList keys = settings.allKeys(); for (auto i=0;i<keys.size();i++) { configvalues.push_back(settings.value(keys[i]).toString()); } Channel = configvalues[0].toInt() ; auto my_Ip = configvalues[1]; auto hostIp = configvalues[2]; auto iterations = configvalues[3]; Port = configvalues[0].toInt();

@suslucoder said in Table widget search bar doesnt update the value: is this a wrong usage or might it be a problem? This is actually easier than what I suggested.

@OscarTheGrouch said in [Qt Creator 4.14.1, with Qt 5.12.10. Kits and Cmake issues] This worked and I can run a new project now .. Happy coding! Please mark the thread as "Solved"

OK, thank you. I finally posted a question, so the server came back. :)

That I do not know, sorry.

IIRC, QtQuick video's output supports a larger range of formats without conversions or rather, the conversion is done in the last shader of the rendering pipeline,

@RekTekk249 said in Tons of error for no obvious reason: Two hours ago, everything was going well, until I realised I needed the same instance of my helper class in my MainWindow than in my LoginWindow. If you would have posted the whole file, esp. showing the parts you've changed, it would have saved a lot of troubleshooting ;-) It's also a debugging thing... If you made changes and suddenly nothing works anymore, revert the changes and try to figure out why it happened.

@mingvv First, you should understand the basics of C++ and object-oriented programming in general. Without it's really hard to get a satisfying result and you will spend most of your time looking for things or trying to figure out how things work (or why they don't). Qt also has Model-View based classes. https://doc.qt.io/qt-5/model-view-programming.html You can communicate with your GUI or other QObject classes using the Qt signal&slot system or using events. For example if you press a button, you will emit the clicked signal. Then, if you connect a slot (= function) to this signal, the function will be called to perform some actions. https://doc.qt.io/qt-5/signalsandslots.html A (simple) snake game in Qt might be a practice to start with. Think about what classes / structure you will need, design your GUI and start writing your code :) Might be helpful: https://doc.qt.io/qt-5/graphicsview.html According the "GUI Code vs Designer" thing: It's mostly a mix of both. Some things just can't be done using the QtDesigner, but it helps a lot creating your basic widgets and your basic design.

Sorry, my fault. The attributes are editable. I had the editors on the sides squeezed a bit to show more of the form. So the attributes weren't visible, only the titles. Silly mistake. I think everything is working now. Thank you very much for your help.

Solution was easy. I had to add #include <QGraphicsTextItem> and it just works.

What is DataBuffer? And how do you render the data in the GUI thread?

All within the same device ?