General and Desktop

I have found the root cause of this issue. This is a problem with the latest version of Windows 11 SDK 10.26100.0: NAN is no longer compile-time constant in Windows 11 SDK 10.0.26100.0 Rolling back to the previous version of Windows 11 SDK 10.0.22000.0 solves my issue.

I have created a class that ensures only one connection is active at a time. I would like to post the code, unfortunately akismet.com thinks it would be spam.. In any case, thank you very much for your help.

Hi, some years ago (Qt5 era) there was versions of Qt for UWP, you might try those. Googled a bit and found an installer for Qt 5.14.2 here and a screenshot: [image: 4e310f65-4599-4651-9a45-8633d82543aa.png]

(Nearly) all of this functionality is available in other modules now. You have to find out where by yourself.

Or simply use qWait/qWaitFor() instead QCoreApplication::processEvents()

@JonB Yes, but QListWidget does not seem to have a function to specify row and column and insert an object, so I am wondering what other method I can use...

Check my example here: https://forum.qt.io/post/804638

@Ajit-Patil said in I have lines in Qt graphics UI. I want to highlight the line on mouse hover: I want to highlight the line on mouse hover One possible way to do so: Subclass your item and re-implement these two functions in your QGraphicsItem void hoverEnterEvent(QGraphicsSceneHoverEvent * event); void hoverLeaveEvent(QGraphicsSceneHoverEvent * event);

@arunkannan said in windows application scaling: How do I have the same size for the GUI contents irrespective of screen resolution and scaling Use layouts: https://doc.qt.io/qt-6/layout.html

https://doc.qt.io/qt-6/linux-requirements.html Looks like you're missing on some of the packages from your linux distro.

yes, it's easy when you know how. I found a relevant tutorial.

@Christian-Ehrlicher said in How to use Q_GLOBAL_STATIC with QMap: Typedef the QMap I always found typedef at least a little confusing. With modern C++ we can use using to "typedef" new types. I would assume that also putting QMap<QString, MyType> into parentheses, i.e. ( and ), would work because this is a macro to be expanded.

I know this is an old post, but some additional info: This not only seizes up the window manager, but actually seems to have the effect of eventually seizing up the whole kernel - power-off / power-on. I encountered this problem a few weeks ago - it is indeed easily reproducible. System is Fedora 39, running KDE / X. Once the debugger breaks, KDE is seized hard, as described in earlier posts. My plan was to use Ctrl+Alt+F3 to get a console login prompt from where I was planning to attempt to killall -9 gdb. I was actually able to login if I did it quickly. The echo of keystrokes was very laggy, and by the time I got a few keystrokes entered to kill the debugger, the entire kernel seems seized. Monitors go to sleep and can't ping from another computer. This seems particularly surprising as all the processes involved are running in user space, and the text terminal does not have any window manager involved. Hopefully this might provide a clue to anyone working on a solution. Unfortunately, this lock-up is so destructive that I gave up trying to debug Qt::Popup widgets, and am just removing that flag while debugging - or of course good old printf / qDebug.

Thank you. I will look into this. I still have a bit of research to do.

Thank you, Gentlemen. I indeed ran into a method "ambiguous" error while trying with qOverload but since I've been using lambdas (as signposted "1 Lambda" in the post above) I decided to investigate that later on under the assumption I misunderstood something. Now it is clear I did not :) At any rate, I learned something new from your answers today and am grateful. Have a lovely day!

Here's some c++ code to fix this, I used this method when i was having the same problem. Note that i am not experienced with c++, So i apologize for any mistakes in the code below. Connect this function to slider.valueChanged: void slider_value_mapper(int v) { int steps = 10; // Enter the amount of user specified steps you want here. slider->setValue(static_cast<int>(v / steps) * steps); // Static cast to make sure its not a floating point number. }; Another quick note, The slider may not be able to go to the end. You may wanna adjust its range for that, If it happens.

Hi everyone, facing the similar issue, setting the various stylesheet after reading the QSS to the application level. And most of the time it is working perfectly, but suddenly it is broken. Don't know the reason. Did anyone know. even there is no particular step to reproduce it 100% time. Using Qt 5.15.1