@xiehuii How did you create this Kit? What Qt version? On which OS?

Hi, You will have to use the corresponding private module in your project.

Are you looking to do error-checking and error-prevention by ensuring (before "shipping" an application) that all your C++ types that should be registered are, indeed, actually properly registered? If that is your goal, then I commend you. I am interested in that topic as well. So far, I have been able to greatly increase detection of many such issues using a combination of: total ban on "qml warnings". (things that qml prints as "warnings" tend to be what I consider fatal bugs). launch the application during automated testing use automated scripts to scan the output of the launched application for any forbidden output such as "unregistered datatype" and "failed to load component" The ban on warnings that I mention in point (1) is achieved by installing (in C++) a Qt custom message handler to spy on all logged messages and abort if any messages are "warnings" emanating from a qml file: https://github.com/219-design/qt-qml-project-template-with-ci/blob/4d81552d77/src/app/qml_message_interceptor.cc#L44 Launching the application during C.I. on a headless machine is done with Xvfb: https://github.com/219-design/qt-qml-project-template-with-ci/blob/4d81552d772c32b7d62edb4b4f0f678ca92bed4f/run_all_tests.sh#L50 The warnings-ban could be used on any platform. The Xvfb automation, to my knowledge, would be limited to Linux applications. Therefore a parser-based detection system could be a more cross-platform portable solution. If you come up with a parsing-based solution, I'm sure that I and many other users that combine C++ with QML would be happy to try out your solution.

Did you already read the Graphics View Overview in Qt's documentation ?

Which code exactly ?

@jsulm i want to start and stop gstreamer pipeline on press of button

@Pl45m4 True, I see that QPainterPath is getting me nowhere in this case. Thanks.

@VRonin wow, it's really work. Thank you

@vicky_mac A QStackedWidget works like a book. You have pages with your content. You can flip these pages to change your widget inplace (without opening another window or something else). So one possibility is to put one of each QTabWidget (each with a different tabBar position) on a page of a QStackedWidget. You could flip the pages by clicking a dummy tab on each tabBar or you use a button to go to the next page. I know, this is not exactly what the widget in your image looks like :) @vicky_mac said in How to Add multiple Qtoolbar in QtabWidget: Haven't used QT much If you want a widget, that looks exactly like the one shown above, you could still try to subclass and create your own, custom TabWidget, but I fear, that it might be a little too challenging. Here's all you need to know about QStackedWidget (https://doc.qt.io/qt-5/qstackedwidget.html#details)

@J-Hilk @aha_1980 I think i failed to see simplicity of this one. thank you for guidence.

@jsulm Sorry for the late response. Thank you very much for very clear answer. It helps.

@SGaist I'll try to cross compile qt again and let you know the error . Meanwhile can you please share any link where i can get the procedure about how to cross compile qt for zynq mpsoc devices. Thanx.

Just found out about QSortFilterProxyModel::filterAcceptsColumn which provides an integer for the column-index and hence suits my usecase perfectly. Still unsure why I couldn't get it to work with map(From/To)Source though

You already use QTextStream::readLine() - so why do you read it with ifstream before? You simply read it twice for no reason.

Hi, thanks you for answer. The scroll area in my application is inside another widget, the main window, and it has an illustrated background. The problem is for main window not the content of the scroll area. Anyway, I found a workaround, I set the same background for the main window and the scroll bar, so the scroll bar is opaque but looks transparent. I still wonder why is there this strange behaviour with the scroll bar, but this topic can be considered as solved as I found a way to get around this.

As @SGaist pointed out you don't fill _sockets anywhere and as I pointed out you don't need to search the socket in _sockets at all since you already cast QObject::sender() to the correct QTcpSocket although qobject_cast or dynamic_cast should be used instead static_cast

Seems to be a bug reported here QTBUG-50244 Nobody tried to integrate MySQL for a Raspberry Pi project already ?! no workaround?! Seems strange :(

Hi @newbisoso , See this, it may help you

@rohit1729 You should read this first: https://doc.qt.io/qt-5/signalsandslots.html void panelB::mouseMoveEvent(QMouseEvent *eventMove) { QString txt; txt = QString("(X:%1,Y:%2)").arg(eventMove->pos().x()).arg(eventMove->pos().y()); emit coordinatesChanged(eventMove->pos().x(), eventMove->pos().y()); //qDebug() << txt; } coordinatesChanged would be the signal.

@alizadeh91 I don't have a solution for you, only a warning. If you intend to parse arbitrary C++ files from anywhere, rather than some terribly cut-down subset whose layout you know intimately, you're going to find this very hard to do. Very, very hard! Heck, you can't even write a grammar for parsing C++ source files because of the pre-processor, e.g. http://trevorjim.com/c-and-cplusplus-are-not-context-free/ To parse C and C++, you start by using a very powerful preprocessor. These preprocessors are inevitably written by hand (they are not based on a theoretic foundation like regular expressions or context-free grammars). As far as I am aware, there is no open source which will produce a standalone parse tree for you. The consensus (search the web) is that you really need to try to leverage an existing C++ compiler to do such a job. You could look at gcc, or perhaps more likely clang. I still don't think you'll get what you want out of them. If all you want to do is some hacky approximation which just extracts #include statements so that you can follow them then you could do something with QRegularExpressions. Correctly locating & extracting the definition of functions in .cpp/.h files will be harder --- you'll probably end up making all sorts of assumptions as to where definitions start & end more on a line-by-line basis than via regular expressions or proper parsing. It may do you for your purposes, provided you are happy with some vague approximation which is not robust. Sorry, but good luck!

Call fitInView on the GraphicsView with the Image whenever the size of the GraphicsView changes. The rest should work automatically.

@mpyne said in How to use KDE Frameworks with Qt Creator: Hi @daljit97, as you guessed, the difficulty is in helping Qt to find the appropriate metadata so that qmake knows how to handle "KSyntaxHighlighting" when it finds it in your QMake project file. Looking at some of the Qt docs on a related topic, I found this page on advanced QMake usage. The part you care about is the third option to add features to qmake: using the QMAKEPATH environment variable. By exporting this variable in your shell to the KF5 install directory, qmake should be able to find the various KF5 modules. For example, my KF5 install is at ~/kde-5, so I did something like: export QMAKEPATH=$HOME/kde-5 qmake make on a shell project # program.pro TEMPLATE = app TARGET = program INCLUDEPATH += . QT += widgets KSyntaxHighlighting SOURCES += main.cpp // main.cpp #include <QMainWindow> #include <QApplication> #include <QLabel> #include <Definition> int main(int argc, char **argv) { QApplication app(argc, argv); QMainWindow *win = new QMainWindow; KSyntaxHighlighting::Definition def; win->setCentralWidget( new QLabel(QStringLiteral("Hi!"), win) ); win->show(); return app.exec(); } It is also possible to build Qt applications with CMake, and that is more traditional for significant KF5 users. But as long as this works for you it looks like it won't be too hard to do what you're trying to do while continuing to use qmake. Ok so that was very helpful. On my machine that KSyntaxHighlighting had a .pri file in /usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules. Following your suggestion I added a QMAKEPATH Environment variable in Qt Creator using the GUI tool that Qt Creator provides and now everything works!

@alizadeh91 See https://stackoverflow.com/questions/56886410/access-local-user-file-on-qt-for-web-assembly

I fixed it! My qmake.conf was correct but I was missing a configuration option. Now my configuration looks lit this: ~/qt-everywhere-src-5.11.2//configure -opensource -confirm-license -release -device stm32mp1 -device-option CROSS_COMPILE=~/gcc-linaro-7.4.1-2019.02-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- -sysroot ~/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-openstlinux_weston-linux-gnueabi -skip qtwebengine -prefix /usr/local/Qt-5.11.2-arm -nomake examples -nomake tests -opengl es2

@alizadeh91 Basically, your question is the same as "How do I make a standalone executable that is compiled to native code that plays my animation." You need to either write or use a compiler and toolchain that builds software for the target. In this case, your target is webassembly rather than something like Win64 or OS-X. It's unclear if that's really what you want to do, but there's no real support for emitting webassembly from Qt, any more than there is for emitting Windows .exe's. Qt depends on the system's native compiler and toolchain to make compiled executables. It isn't a compiler in itself. If you are able to export your animations to a (de facto) standard format like Lottie : https://airbnb.io/lottie/ you can find off the shelf player tools which may be useful to you.

@Eoin what about work visa, will you take care of it.?

Thanks for your help with this. The Qt Creator editor is a good alternative. I did run Dependency Walker - long time since I have looked at the output from this and not sure what I am seeing right now, but I've pasted the an abreviated version of the output below (too long to paste the whole thing) if it tells you something. Thanks again. | System Information | | Search Order | * Legend: F File E Error (path not valid) * * Side-by-Side components (Windows 2000/XP/2003/Vista/+) [F ] c:\windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.14393.2938_none_c58b03c797c07d8c\COMCTL32.DLL [F ] c:\windows\winsxs\x86_microsoft.windows.gdiplus_6595b64144ccf1df_1.1.14393.2969_none_f678e0c2f2505d00\GDIPLUS.DLL The system's "KnownDLLs" list [F ] c:\windows\system32\ADVAPI32.DLL [F ] c:\windows\system32\BCRYPTPRIMITIVES.DLL [F ] c:\windows\system32\CFGMGR32.DLL [F ] c:\windows\system32\CLBCATQ.DLL [F ] c:\windows\system32\COMBASE.DLL [F ] c:\windows\system32\COMCTL32.DLL [F ] c:\windows\system32\COMDLG32.DLL [F ] c:\windows\system32\COML2.DLL [F ] c:\windows\system32\CRYPT32.DLL [F ] c:\windows\system32\DIFXAPI.DLL [F ] c:\windows\system32\GDI32.DLL [F ] c:\windows\system32\GDI32FULL.DLL [F ] c:\windows\system32\GDIPLUS.DLL [F ] c:\windows\system32\IMAGEHLP.DLL [F ] c:\windows\system32\IMM32.DLL [F ] c:\windows\system32\KERNEL.APPCORE.DLL [F ] c:\windows\system32\KERNEL32.DLL [F ] c:\windows\system32\KERNELBASE.DLL [F ] c:\windows\system32\LPK.DLL [F ] c:\windows\system32\MSASN1.DLL [F ] c:\windows\system32\MSCTF.DLL [F ] c:\windows\system32\MSVCP_WIN.DLL [F ] c:\windows\system32\MSVCRT.DLL [F ] c:\windows\system32\NORMALIZ.DLL [F ] c:\windows\system32\NSI.DLL [F ] c:\windows\system32\NTDLL.DLL [F ] c:\windows\system32\NTDLL.DLL [F ] c:\windows\system32\OLE32.DLL [F ] c:\windows\system32\OLEAUT32.DLL [F ] c:\windows\system32\POWRPROF.DLL [F ] c:\windows\system32\PROFAPI.DLL [F ] c:\windows\system32\PSAPI.DLL [F ] c:\windows\system32\RPCRT4.DLL [F ] c:\windows\system32\SECHOST.DLL [F ] c:\windows\system32\SETUPAPI.DLL [F ] c:\windows\system32\SHCORE.DLL [F ] c:\windows\system32\SHELL32.DLL [F ] c:\windows\system32\SHLWAPI.DLL [F ] c:\windows\system32\UCRTBASE.DLL [F ] c:\windows\system32\USER32.DLL [F ] c:\windows\system32\WIN32U.DLL [F ] c:\windows\system32\WINDOWS.STORAGE.DLL [F ] c:\windows\system32\WINTRUST.DLL [F ] c:\windows\system32\WLDAP32.DLL [F ] c:\windows\system32\WOW64.DLL [F ] c:\windows\system32\WOW64CPU.DLL [F ] c:\windows\system32\WOW64WIN.DLL [F ] c:\windows\system32\WS2_32.DLL The application directory [ ] C:\Qt\5.12.3\msvc2015_64\bin The 32-bit system directory [ ] C:\Windows\system32 The 16-bit system directory (Windows NT/2000/XP/2003/Vista/+) [ ] C:\Windows\system The system's root OS directory [ ] C:\Windows The application's registered "App Paths" directories The system's "PATH" environment variable directories [ ] C:\Program Files\Microsoft MPI\Bin [ ] C:\Windows\system32 [ ] C:\Windows [ ] c:\Qt\5.12.3\bin\ | Module Dependency Tree | * Legend: F Forwarded Module ? Missing Module 6 64-bit Module * D Delay Load Module ! Invalid Module * * Dynamic Module E Import/Export Mismatch or Load Failure * ^ Duplicate Module * * [ 6] DESIGNER.EXE [ 6] QT5DESIGNERCOMPONENTS.DLL [ ^6] QT5DESIGNER.DLL [ ^6] QT5WIDGETS.DLL [ ^6] QT5GUI.DLL [ ^6] QT5XML.DLL [ ^6] QT5CORE.DLL [ E ] KERNEL32.DLL [FE ] NTDLL.DLL [ E ] VCRUNTIME140.DLL [ ^6] API-MS-WIN-CRT-RUNTIME-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-STRING-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-HEAP-L1-1-0.DLL [FE ] UCRTBASE.DLL [ 6] QT5DESIGNER.DLL [ ^6] QT5WIDGETS.DLL [ ^6] QT5GUI.DLL [ ^6] QT5XML.DLL [ ^6] QT5CORE.DLL [ E ] MSVCP140.DLL [ E ] VCRUNTIME140.DLL [ ^6] API-MS-WIN-CRT-HEAP-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-LOCALE-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-STRING-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-RUNTIME-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-STDIO-L1-1-0.DLL [FE ] UCRTBASE.DLL [ E6] API-MS-WIN-CRT-MATH-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-CONVERT-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-FILESYSTEM-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-TIME-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-ENVIRONMENT-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-UTILITY-L1-1-0.DLL [FE ] UCRTBASE.DLL [ E ] KERNEL32.DLL [FE ] NTDLL.DLL [DE ] CONCRT140.DLL [ E ] MSVCP140.DLL [ E ] VCRUNTIME140.DLL [ ^6] API-MS-WIN-CRT-RUNTIME-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-HEAP-L1-1-0.DLL [FE ] UCRTBASE.DLL [ E6] API-MS-WIN-CRT-MATH-L1-1-0.DLL [ ^6] API-MS-WIN-CRT-STRING-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-STDIO-L1-1-0.DLL [FE ] UCRTBASE.DLL [ E ] KERNEL32.DLL [FE ] NTDLL.DLL [ E ] KERNEL32.DLL [FE ] NTDLL.DLL [ E ] VCRUNTIME140.DLL [ ^6] API-MS-WIN-CRT-MATH-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-RUNTIME-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-STRING-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-STDIO-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-HEAP-L1-1-0.DLL [FE ] UCRTBASE.DLL [ 6] QT5PRINTSUPPORT.DLL [ ^6] QT5WIDGETS.DLL [ ^6] QT5GUI.DLL [ ^6] QT5CORE.DLL [ E ] WINSPOOL.DRV [ E ] COMDLG32.DLL [ E ] GDI32.DLL [ E ] USER32.DLL [ E ] KERNEL32.DLL [FE ] NTDLL.DLL [ E ] VCRUNTIME140.DLL [ ^6] API-MS-WIN-CRT-STDIO-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-HEAP-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-MATH-L1-1-0.DLL [FE ] UCRTBASE.DLL [ ^6] API-MS-WIN-CRT-RUNTIME-L1-1-0.DLL [FE ] UCRTBASE.DLL [ 6] QT5WIDGETS.DLL [ ^6] QT5GUI.DLL [ ^6] QT5CORE.DLL [ E ] UXTHEME.DLL [ E ] MSVCRT.DLL [ ? ] API-MS-WIN-CORE-LIBRARYLOADER-L1-2-0.DLL [ E6] API-MS-WIN-CORE-SYNCH-L1-2-0.DLL [FE ] KERNEL32.DLL [FE6] API-MS-WIN-CORE-SYNCH-L1-1-0.DLL [ ? ] API-MS-WIN-CORE-HEAP-L1-2-0.DLL [ ? ] API-MS-WIN-CORE-ERRORHANDLING-L1-1-1.DLL [ ? ] API-MS-WIN-CORE-PROCESSTHREADS-L1-1-2.DLL [ ? ] API-MS-WIN-CORE-LOCALIZATION-L1-2-1.DLL [ ? ] API-MS-WIN-CORE-DEBUG-L1-1-1.DLL [ ^6] API-MS-WIN-CORE-HANDLE-L1-1-0.DLL [FE ] KERNEL32.DLL [ ? ] API-MS-WIN-CORE-SYSINFO-L1-2-1.DLL [ ? ] API-MS-WIN-CORE-LIBRARYLOADER-L1-2-2.DLL [ ? ] API-MS-WIN-CORE-FILE-L1-2-1.DLL [ ^6] API-MS-WIN-CORE-STRING-L1-1-0.DLL [FE ] KERNEL32.DLL [ ^6] API-MS-WIN-CORE-UTIL-L1-1-0.DLL [FE ] KERNEL32.DLL [FE ] NTDLL.DLL [ ? ] API-MS-WIN-CORE-WINRT-ERROR-L1-1-1.DLL [ ? ] API-MS-WIN-CORE-REGISTRY-L1-1-0.DLL [ ? ] API-MS-WIN-SECURITY-BASE-L1-2-0.DLL [ ? ] API-MS-WIN-CORE-HEAP-L2-1-0.DLL [ ? ] API-MS-WIN-CORE-MEMORY-L1-1-2.DLL [ ^6] API-MS-WIN-CORE-PROFILE-L1-1-0.DLL [FE ] KERNEL32.DLL [ ? ] API-MS-WIN-CORE-STRING-L2-1-0.DLL [ ? ] API-MS-WIN-CORE-PROCESSENVIRONMENT-L1-2-0.DLL [ ^6] API-MS-WIN-CORE-TIMEZONE-L1-1-0.DLL [FE ] KERNEL32.DLL [ ? ] API-MS-WIN-CORE-SIDEBYSIDE-L1-1-0.DLL [ ? ] API-MS-WIN-CORE-ATOMS-L1-1-0.DLL [ ? ] API-MS-WIN-CORE-KERNEL32-LEGACY-L1-1-1.DLL [ ? ] API-MS-WIN-CORE-STRING-OBSOLETE-L1-1-0.DLL [ ? ] API-MS-WIN-CORE-SHLWAPI-OBSOLETE-L1-2-0.DLL [ ? ] API-MS-WIN-CORE-LOCALIZATION-OBSOLETE-L1-3-0.DLL [ E ] NTDLL.DLL [ E ] GDI32.DLL [ E ] USER32.DLL [FE ] NTDLL.DLL [ ? ] API-MS-WIN-CORE-DELAYLOAD-L1-1-1.DLL [D? ] API-MS-WIN-CORE-COM-L1-1-1.DLL [DE ] OLEAUT32.DLL [D? ] API-MS-WIN-CORE-WINRT-STRING-L1-1-0.DLL [D? ] API-MS-WIN-SECURITY-SDDL-L1-1-0.DLL [DE ] CRYPTSP.DLL [DE ] DWMAPI.DLL [DE ] WINDOWSCODECS.DLL ... | Module List |* * Legend: D Delay Load Module ? Missing Module 6 64-bit Module * * Dynamic Module ! Invalid Module * E Import/Export Mismatch or Load Failure * * Module File Time Stamp Link Time Stamp File Size Attr. Link Checksum Real Checksum CPU Subsystem Symbols Preferred Base Actual Base Virtual Size Load Order File Ver Product Ver Image Ver Linker Ver OS Ver Subsystem Ver [ ? ] API-MS-WIN-CORE-APIQUERY-L1-1-0.DLL Error opening file. The system cannot find the file specified (2). [ ? ] API-MS-WIN-CORE-APPCOMPAT-L1-1-1.DLL Error opening file. The system cannot find the file specified (2). [ ? ] API-MS-WIN-CORE-APPINIT-L1-1-0.DLL Error opening file. The system cannot find the file specified (2). [ ? ] API-MS-WIN-CORE-ATOMS-L1-1-0.DLL Error opening file. The system cannot find the file specified (2). [ ? ] API-MS-WIN-CORE-CALENDAR-L1-1-0.DLL Error opening file. The system cannot find the file specified (2). [ ? ] API-MS-WIN-CORE-COM-L1-1-0 Error opening file. The system cannot find the file specified (2). [ ? ] API-MS-WIN-CORE-COM-L1-1-1.DLL Error opening file. The system cannot find the file specified (2). [ ? ] API-MS-WIN-CORE-COM-MIDLPROXYSTUB-L1-1-0.DLL Error opening file. The system cannot find the file specified (2). | Log |* Error: At least one required implicit or forwarded dependency was not found. Error: At least one module has an unresolved import due to a missing export function in an implicitly dependent module. Error: Modules with different CPU types were found. Error: A circular dependency was detected. Warning: At least one delay-load dependency module was not found. Warning: At least one module has an unresolved import due to a missing export function in a delay-load dependent module.

@aha_1980 That's what I thought. If I manually start valgrid it runs fine, it produces a report as well. I just wanted to make it work with Qt because it looks more convenient. I'll try updating Qt creator later on. Thanks

Hi, Absolutely, in the same creator session I can toggle between toolchains, Desktop is fine, but Raspberry Pi is giving the aforementioned problem. This is my setup. Build settings: PATH: /home/ubuntuvm/raspi/qt5/bin:/home/ubuntuvm/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/arm-linux-gnueabihf/bin Kit: Device: Qt Versions: Compilers: Compiler Path (C & C++): /home/ubuntuvm/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/arm-linux-gnueabihf/bin/gcc Debuggers: Qbs:

@Eager This solution worked for me thanks!

Bonjour, Vous avez déjà reçu plusieurs réponses sur ce cette question ci. Les avez-vous testées ?

Bonjour, La fonction on_pushButton_clicked ne fait rien de visible. Vous appelez data puis vous remettez exactement le même model sur ui->tableView. Donc grosso-modo, il ne se pass rien. Ne devriez vous pas appelez setData en passant la couleur voulue ?

Hi http://doc.qt.io/qt-5/qtbluetooth-index.html Do you have BlueZ 4.x/5.x installed ?

Hi again ! It seems that by looking still a bit more I found a suitable answer. The key was to set the QSqlRelationalDelegate for the mapper and not the QComboBox but still setting the model of the QComboBox to the table containing all the functions. Here is my final code: //Init all private members //Init all private members price1 = new QDoubleSpinBox(this); price2 = new QDoubleSpinBox(this); price3 = new QDoubleSpinBox(this); price4 = new QDoubleSpinBox(this); function = new QComboBox(this); mapper = new QDataWidgetMapper(this); sqlModel = new QSqlRelationalTableModel(this); QSqlTableModel *fctModel = new QSqlTableModel(this); QListView *articlesView = new QListView(this); //Imediately links the views and the models sqlModel->setTable("Articles"); //A few indexes int nameIndex = sqlModel->record().indexOf("Name"); int priceIndex = sqlModel->record().indexOf("sellPrice"); int jobShareIndex = sqlModel->record().indexOf("jShare"); int bPriceIndex = sqlModel->record().indexOf("bPrice"); int redPriceIndex = sqlModel->record().indexOf("reducedPrice"); int functionIndex = sqlModel->record().indexOf("function"); int functionNameIndex; { auto tmp = new QSqlTableModel(); tmp->setTable("Functions"); functionNameIndex = tmp->record().indexOf("name"); delete tmp; } //Configures the sql model sqlModel->setRelation(functionIndex, QSqlRelation("Functions", "Id", "name")); sqlModel->setEditStrategy(QSqlTableModel::OnFieldChange); sqlModel->select(); //Views articlesView->setModel(sqlModel); articlesView->setModelColumn(nameIndex); //Sets the column to the name articlesView->setEditTriggers(QAbstractItemView::NoEditTriggers); function->setModel(sqlModel->relationModel(functionIndex)); function->setModelColumn(functionNameIndex ); //Mapper mapper->setModel(sqlModel); mapper->addMapping(price1, priceIndex); mapper->addMapping(price2, bPriceIndex); mapper->addMapping(price3, jobShareIndex); mapper->addMapping(price4, redPriceIndex); mapper->addMapping(function, functionIndex); mapper->setItemDelegate(new QSqlRelationalDelegate(mapper)); mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit); I hope that it will be able to help anybody who might encounter that same problem ! Happy new year everybody, take care ! :)