Qt Creator and other tools

@AnneRanch said in From "example" to project...?: Actually (the old fart ) cannot remember how to get to "git" repository from this screen.. You got that window because you selected File > New File or Project... > Import Project > Git Clone Is there a way to skip retrieving "git" repository directly from finding the example ? Yes. Click the example image directly without clicking the File menu.

@AnneRanch said in How to implement new signal / slot ?: I am looking for something like flow chart add "slot " (declaration ? ) to class header under private slots: void on_actionAddWindow_triggered(); // add void on_TEST_Action(); code "slot" (definition ?) in class .cpp file etc.... The steps you described above are correct for slots. You do exactly the same thing as if you're implementing a new function/method. Just make sure that the name and parameters in the .h file match those in the .cpp file: // .h MainWindow : public QMainWindow { /* ... */ private slots: void on_actionAddWindow_triggered(); }; // .cpp void MainWindow::on_actionAddWindow_triggered() { // Add your logic here } I cannot find anywhere how to add new signal / slot utilizing BOTH QtCreator and QDesigner. Qt Designer is mainly for setting the visual layout. You don't need it to implement new signals/slots.

I don't understand the why you mention theme name at all, sorry. "fromTheme" simply means "give me an icon from system theme" or "give me a standard system icon". The method returns an icon (ready to use), not path - there is no need to convert icon to theme or anything like that. Or I'm missing your point.

@jsulm dirac@busterPC:~/Qt/Tools/QtCreator/bin$ QT_DEBUG_PLUGINS=1 ./qtcreator Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway. QFactoryLoader::QFactoryLoader() checking directory path "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms" ... QFactoryLoader::QFactoryLoader() looking at "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqeglfs.so" Found metadata in lib /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqeglfs.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "eglfs" ] }, "archreq": 0, "className": "QEglFSIntegrationPlugin", "debug": false, "version": 331520 } Got keys from plugin meta data ("eglfs") QFactoryLoader::QFactoryLoader() looking at "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqlinuxfb.so" Found metadata in lib /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqlinuxfb.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "linuxfb" ] }, "archreq": 0, "className": "QLinuxFbIntegrationPlugin", "debug": false, "version": 331520 } Got keys from plugin meta data ("linuxfb") QFactoryLoader::QFactoryLoader() looking at "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqminimal.so" Found metadata in lib /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqminimal.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "minimal" ] }, "archreq": 0, "className": "QMinimalIntegrationPlugin", "debug": false, "version": 331520 } Got keys from plugin meta data ("minimal") QFactoryLoader::QFactoryLoader() looking at "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqminimalegl.so" Found metadata in lib /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqminimalegl.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "minimalegl" ] }, "archreq": 0, "className": "QMinimalEglIntegrationPlugin", "debug": false, "version": 331520 } Got keys from plugin meta data ("minimalegl") QFactoryLoader::QFactoryLoader() looking at "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqoffscreen.so" Found metadata in lib /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqoffscreen.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "offscreen" ] }, "archreq": 0, "className": "QOffscreenIntegrationPlugin", "debug": false, "version": 331520 } Got keys from plugin meta data ("offscreen") QFactoryLoader::QFactoryLoader() looking at "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqvnc.so" Found metadata in lib /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqvnc.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "vnc" ] }, "archreq": 0, "className": "QVncIntegrationPlugin", "debug": false, "version": 331520 } Got keys from plugin meta data ("vnc") QFactoryLoader::QFactoryLoader() looking at "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so" Found metadata in lib /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so, metadata= { "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3", "MetaData": { "Keys": [ "xcb" ] }, "archreq": 0, "className": "QXcbIntegrationPlugin", "debug": false, "version": 331520 } Got keys from plugin meta data ("xcb") QFactoryLoader::QFactoryLoader() checking directory path "/home/dirac/Qt/Tools/QtCreator/bin/platforms" ... Cannot load library /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: cannot open shared object file: No such file or directory) QLibraryPrivate::loadPlugin failed on "/home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /home/dirac/Qt/Tools/QtCreator/lib/Qt/plugins/platforms/libqxcb.so: (libxcb-util.so.1: cannot open shared object file: No such file or directory)" qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb. Aborted dirac@busterPC:~/Qt/Tools/QtCreator/bin$ I tried to enable wayland because I libxcb-util.so.1 could not be found, which in turn led me to export the plugins dir. Then, I read https://bugreports.qt.io/browse/QTBUG-88688, which indeed reports that libxcb-util.so.1 does not exist in Debian Buster. So, I created a symlink from libxcb-util.so.0 to it, which seems to have solved the problem. Thanks!

@maxmaxmax It looks like you're trying to use QBS? You should rather use QMake (or CMake).

No Qt problem but QtCreator -> moved to 'Tools'

@Giacomogr said in Qt error launch application: I have a question, why running the program from the terminal does not give me this error? Different environment I guess, but can't say what exactly causes this. You can compare what "env" prints out in terminal to the Run configuration in QtCreator.

@JKSH said in How to get rid of the little yellow bulb without disabling code completion?: The humble lightbulb has been upskilling ;-) LOL :)

I had the same problem and I solved it by creating a symbolic link, sudo ln -s /usr/lib/x86_64-linux-gnu/libxcb-util.so.0 /usr/lib/x86_64-linux-gnu/libxcb-util.so.1

@SGaist this happens to me and is very frustrating. The only solution i have is to create a new w10 account and install a new Qt there. I have no issues on other 2 w10 machines.

@eyllanesc That worked. Many thanks.

There can be numerous reasons why the driver is not found. A good start is to define the QT_DEBUG_PLUGINS environment variable. This should print out diagnostic information where Qt is looking for plugins, and also why it fails to load some.

You need to deploy your application, see https://doc.qt.io/qt-5/windows-deployment.html BTW. Asking an actual question in a thread post helps us answer it properly ;-) I'm only guessing what you are trying to do and what the problem might be...

Hello SGaist, thank you very much, this seems to have solved the problem. Compile with CONFIG += staticlib ok. Kind regards, Ralf

I was thinking about both cmake and Qt versions.

Does starting with -tcs (or -temporarycleansettings, which is the same) make a difference?

@Crazy-Sage Found it. It was corrupted templates.xml file in $HOME/.designer/ folder, it caused designer to silently crash.

@AnneRanch Caught by ignoring the details - again, MdiChild inherits form QTextEdit hence its function is not directly related to MDI.

@kkoehne where does QT_QML_DEBUG get defined? [image: 91ba2681-d94a-4c99-912b-a1936b2fadab.png]