Hi, Use windeployqt

Hi and welcome to devnet, The most simple way to do it is to ask the people behind the software you are interested in.

@JonB Many thanks for all the help. It's made me go off and do a pile of reading and I understand a little more. I had never understood, for example, what the extern "C" meant, but I think I do now. Some of the reading has suggested to me that Linux has all this sussed a lot better than Windows (but that woud be no surprise ;-) ) This post: https://forum.qt.io/topic/75458/compatibility-libraries-generated-by-msvc-and-mingw/3 Suggests that as long as I follow a few rules I should be OK. I am guessing that you can use internal functions using C++ classes as long as anything exposed to the outside world is C style. I'm still a bit comfused because I am following a PDF for this specific project that talks about what functions must be supplied for the DLL and it gives an example of how to do these functions in Pascal! So my original assumption was any language could be used for the DLL and any language could then use that DLL. From what I can tell, the document I'm following was written in October 2013 so it's a fair while ago, if not from the really early days of Windows - already up to Win 8 by then. It is the case, I think that at least one of the companies who'd want to use this DLL still use Delphi!

1 and 2 worked on my computer debian 12 KDE X11. Maybe the problem is related with wayland.

@Axel-Spoerl Hi Axel. OP wrote: It would be nice if I could just query an existing variable instead of having to set it myself. That way, other developers would not have to remember to do this when they are maintaining my application. So for his purposes he does not want (other) people to have to set an environment variable explicitly or by wrapping this in a .bat file or similar, presumably. The more I read the question as phrased the more it seems to be the same as his linked previous question. I think we need to know just what he wants to answer best.

SwiftUI ==>Apple Flutter==>Google QML==>Qt These are similar. Kind of trend. From the perspective of MVC, QML as view can be a good idea. Non C++ coders like professional GUI designers can use QML easily. I coded a few small apps with QML. I like it.

Unfortunately, I will not be able to get back to this for a few days. We have dozens of other cases of QComboBox which all work. The current case that I am having problems with is more complicated than the others. It uses a completerModel (derived from QAbstractListModel) and has icons on the items.

That message show an architectural design flaw in QtCreator. I had the same problem. If I remember correctly, my system had another Java runtime besides the one in the JDK, and QtCreator used the false one for its configuration. Uninstalling that fixed things.

@Axel-Spoerl beat me to it, but quit messing with QVariant, then read/write your INI file as text, since INI is traditionally suppose to be a human readable format in the first place...and use normal stream read/write operations in text mode. This is also important since text mode negates possible issues with endianness of numerical storage.

@JonB said in warning: slot arguments need to be fully-qualified [clazy-fully-qualified-moc-types]: @DiBosco said in warning: slot arguments need to be fully-qualified [clazy-fully-qualified-moc-types]: C:\Software\Qt\wipernet_monitor\mainwindow.h:187: warning: slot arguments need to be fully-qualified [clazy-fully-qualified-moc-types] That wiperNetMessageStruct is defined in a file called defines.h. Is the defines.h included into mainwindow.h (no use if in mainwindow.cpp) and prior to line 187? Yes, but it's the weirdest thing, I just took out another warning (unused variable) and all those warnings have disappeared. Hey ho.

@peter.thompson Further to my colleagues' replies. A couple of extra possibilities. I don't know whether they are suitable, might depend on how/where you use the delegate, but just to be aware of: Qt has an Animation Framework, "It enables you to animate a Qt property value of a widget or QObject.". You may be able to use its built-in timing rather than roll your own QTimer. Though as @SGaist observed, if you have "fifty at once" you won't want to maintain 50 separate widgets for this. Otherwise, instead of making the model have to emit dataChanged() repeatedly, I believe view->update(view->visualRect(index)); (or even a more general view->viewport()->update(); or view->update();) may/should force a repaint with just a view-side call.

@cristian-adam encode works on strings, str or QString. decode works on bytes, bytes or QByteArray. That may explain <unavailable> on text().decode(). I told you I didn't understand :) If you had stuck to Hello world! we wouldn't be having this discussion ;-)

Any possible culprits in the called functions list of Heaptrack?

@JonB said in QtCreator installer/app poisons the Win11 registry: @cristian-adam Is it the case then: the uninstall either does nothing or does not work, the reinstall does not really uninstall/remove but just happens to overwrite retained values with something else so it ends up working OK? I know I can't be that much use as I don't do Qt under Windows. But would you like me to go find where the Uninstall script is stored in registry so you can try it out standalone, or do you already know this? See above at the manual removal script. I think the Qt Installer should be able to reproduce and fix the QTIFW-3944 issue. I see @ziller is still assigned, hmm.

@Gerd-Brecht Please have a look here: https://forum.qt.io/topic/164022/unable-to-create-bug-report-on-jira Ps: You can now post faster Regards

Yes, https://codereview.qt-project.org/c/pyside/pyside-setup/+/718662

@FRAUBRJ I'm afraid, you haven't found a solution. You have found a way that happens to work for your hardware and your data at the current time of the moon phase. There is so much to improve here, but the important part is, you need some why to verify that you have all data you expect. Do not expect that all data is there when readAll() is called. And despite what you expect, it is called exactly once, your while loop is literally doing nothing.