General and Desktop

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  How to create the plugin of MYSQL for Qt
  • BlackStar  

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  @flydragon Do not duplicate posting because you do not get an answer immendiately. [edit:koahnig see https://forum.qt.io/topic/82629/why-qsqlquery-exec-exit-failed ]
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  Reporting inappropriate content on the forums
  spam • • Eddy  

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  Thank you for the report. I have banned the user, which got rid of the spam posting. Not a loss, as this user did not post any other content on the site. Just deleting this one posting was not possible. Thanks for reporting this.
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  UNSOLVED QMediaPlayer stream data from a self signed https server
  qmediaplayer streaming https • • Vagabond  

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  @Vagabond maybe you need to work with the QMediaNetworkAccessControl related to your QMediaPlayer?
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  UNSOLVED Problems with -avx when configuring qt source code.
  • smallcsduck  

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  @Christian-Ehrlicher I like to explore. I certainly want to give this a try.
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  UNSOLVED QObject::connect: Cannot queue arguments of type 'QMap<QString,int>
  • RahibeMeryem  

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  UNSOLVED QGroupBox discrepancies between Linux and Win
  • willemf  

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  Can you provide a complete minimal project along your ui file ? That will allow to test in the exact same conditions as you have.
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  UNSOLVED windows app for simle API get : TLS initialization failed
  • louis cordhomme  

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  Everything is working ?
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  UNSOLVED PySide2 QTablewidget expected behavior?
  • Stephen Hall  

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  UNSOLVED Filter a column with QSortFilterProxyModel
  • JBosco  

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  @JBosco OK, good, I didn't know setFilterRegExpression() expects a "whole" regular expression, I thought it already implies it had its own ^...$ around whatever you specify. Qt docs are not always clear on this in the various places regular expressions are used.
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  UNSOLVED I have the same problem, do we now have any solution
  • yao_njjjjjj  

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  Did you try the solution suggested in the report ?
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  UNSOLVED my app blinking on ubuntu
  • mmjvox  

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  finaly I found out that the problem was with Intel drivers and update the kernel solved the problem.
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  SOLVED Nested QVector problem
  qvector nest • • pauledd  

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  @mrjj good catch ^^
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  UNSOLVED Vista style is not loaded
  • mcmigliore  

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  I'm not responsible of the packaging but I don't think windeployqt is used.
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  UNSOLVED QtDBus slot not working with expected prototype
  qvariant dbus qtdbus bluez interfacesadded • • rsjudka  

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  Hi and welcome to devnet, Disclaimer: I haven't used that module yet. Doesn't the QVariant parameter contain a QVariantMap ?
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  UNSOLVED QNetworkReply not deleting
  • Ivan Megazoo  

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  Note sure if this helps but we do this: QNetworkReply *reply = somefunctionthatreturnsthereply(); QObject::connect(reply, SIGNAL(finished()), reply, SLOT(deleteLater()));
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  UNSOLVED How to Make Accelerator with & Sign to Work on Mac?
  mac shortcut • • ChiK  

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  Right, I forgot that part. The "workaround" is explained in the QKeySequence documentation linked from the QShortcut one.
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  UNSOLVED QGraphicsView scale Scene to only visible elements
  • sandro4912  

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  UNSOLVED How to use SQLite's PRAGMA application_id
  • l3u_  

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  UNSOLVED How to create weighted graph in graphicsview
  • Kalidian  

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  UNSOLVED Qt equivalent to Win32 BeginPath/EndPath/FlattenPath?
  • Sprezzatura  

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  UNSOLVED Qt virtualKeyboard versioning question
  • Circuits  

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  UNSOLVED Can I control the function keys of key through qt Application?
  • Mijaz  

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  @Mijaz said in Can I control the funtion keys of key through qt Application?: Ctrl+Alt+F7 In linux that will/might switch the active console. What does it mean on your system / context ?
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  UNSOLVED Close / Stop MDIChild in its constructor
  • pixbyte  

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  Dialog or widgets...I think everyone knows what I mean.
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  UNSOLVED singleton for vector data?
  • U7Development  

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  SOLVED Connecting two windows
  • russjohn834  

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  That's right :) was just answering to the original question : @russjohn834 What I'm doing wrong here? have a nice day
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  UNSOLVED QTcpSocket write behavior when large num of bytes are written
  • Taytoo  

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  @Taytoo said in QTcpSocket write behavior when large num of bytes are written: the program won't have any idea how performant the underlying connection is unless we monitor the bytesWritten event and keep track of how much data is pending at any given time Think about the multi-platform capability of Qt framework, so for lots of developers such OS details independence is a blessing... As mentioned in other replies, if you require a super-duper specific kinda low level functionality for a particular OS, you may want to do your own approach. Keep in mind that you can still "mix and match" Qt and some other support libraries. I mean, you can still have all the benefits of Qt GUI for instance, and have your own network module working together.
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  UNSOLVED allocation of incomplete type "Ui::wadd_user.h"
  • U7Development  

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  @U7Development said in allocation of incomplete type "Ui::wadd_user.h": all is working again so mark your post as solved! thanks.
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  UNSOLVED Correctly terminating continuous, threaded application
  • prex  

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  So I added these two connections: QObject::connect(&qrosnode, SIGNAL(finished()), &app, SLOT(quit()), Qt::QueuedConnection); QObject::connect(&app, SIGNAL(aboutToQuit()), &qrosnode, SLOT(quit()), Qt::QueuedConnection); Take a look at the official Thread Example https://doc.qt.io/qt-5/qthread.html#details Even so the Thread object should get cleaned up automatically (its a member variable on the stack) quit and wait are still called. Should I use 'deleteLater()'? Why not just putting 'quit()' and 'wait()' in each QThread destructor?
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  UNSOLVED Trying to implement QChart, get error undefined reference to 'qt_version_tag@Qt_5.9'
  qchart qtversiontag • • markd  

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  @Christian-Ehrlicher mark@mark:/opt/Qt5.9.1/5.9.1/gcc_64/lib$ objdump -T -t libQt5Core.so.5 | grep -i qt_version_tag 000000000035aa9d g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_0 000000000035aa9c g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_1 000000000035aa9b g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_2 000000000035aa9a g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_3 000000000035aa99 g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_4 000000000035aa98 g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_5 000000000035aa97 g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_6 000000000035aa96 g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_7 000000000035aa95 g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_8 000000000035aa94 g DO .rodata 0000000000000001 Qt_5 qt_version_tag_5_9 000000000035aa97 g DO .rodata 0000000000000001 (Qt_5.6) qt_version_tag 000000000035aa94 g DO .rodata 0000000000000001 Qt_5.9 qt_version_tag 000000000035aa9c g DO .rodata 0000000000000001 (Qt_5.1) qt_version_tag 000000000035aa95 g DO .rodata 0000000000000001 (Qt_5.8) qt_version_tag 000000000035aa9d g DO .rodata 0000000000000001 (Qt_5.0) qt_version_tag 000000000035aa9a g DO .rodata 0000000000000001 (Qt_5.3) qt_version_tag 000000000035aa9b g DO .rodata 0000000000000001 (Qt_5.2) qt_version_tag 000000000035aa98 g DO .rodata 0000000000000001 (Qt_5.5) qt_version_tag 000000000035aa99 g DO .rodata 0000000000000001 (Qt_5.4) qt_version_tag 000000000035aa96 g DO .rodata 0000000000000001 (Qt_5.7) qt_version_tag mark@mark:/opt/Qt5.9.1/5.9.1/gcc_64/lib$ objdump -T -t libQt5Widgets.so.5 | grep -i qt_version_tag 0000000000000000 DO *UND* 0000000000000000 Qt_5.9 qt_version_tag mark@mark:/opt/Qt5.9.1/5.9.1/gcc_64/lib$ objdump -T -t libQt5Gui.so.5 | grep -i qt_version_tag 0000000000000000 DO *UND* 0000000000000000 Qt_5.9 qt_version_tag mark@mark:/opt/Qt5.9.1/5.9.1/gcc_64/lib$ objdump -T -t libQt5Charts.so.5 | grep -i qt_version_tag 0000000000000000 DO *UND* 0000000000000000 Qt_5.9 qt_version_tag mark@mark:/opt/Qt5.9.1/5.9.1/gcc_64/lib$
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  SOLVED QSerialPort: problem with waitForReadyRead()
  • oBOXPOH  

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  @oBOXPOH said in QSerialPort: problem with waitForReadyRead(): @aha_1980 said in QSerialPort: problem with waitForReadyRead(): Hi @oBOXPOH, Qt is an event-driven framework. By using endless loops, wait routines you create problems if you don't know what you are exactly doing. You should use QSerialPort with signals and slots. An example is shown here: https://doc.qt.io/qt-5/qtserialport-terminal-example.html Regards Terminal Example also works badly -> https://forum.qt.io/topic/108848/terminal-example-for-qserialport-doesn-t-work-correctly Solution is to install 5.13.2 or more version of Qt.
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  UNSOLVED missing qt eglfs libraries in my BBB
  • Asha  

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  @Asha said in missing qt eglfs libraries in my BBB: how to install those llibraries in my board Like any other packages. What OS is running on your device? "in my board,"plugin" folder I am not getting the eglfs plugin how to install that one?" - install missing packages, sync sysroot, run configure and check whether eglfs is enabled.
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  UNSOLVED Issue While deleting a Movie after the Given time
  • sankarapandiyan  

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  @sankarapandiyan said in Issue While deleting a Movie after the Given time: Whole window closed by default and shows Your application is crashing. You should said that instead of saying that the window is closed because it is not the same. It looks like movie was already deleted. And do not catch the pointer by reference: QTimer::singleShot(8000,[movie]{ movie->deleteLater(); });
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  UNSOLVED Issue in Uploading Image file using post method:
  • Kira  

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  @JonB : Sorry I didn't mean that :p Will check and let u know
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  UNSOLVED Terminal Example for QSerialPort doesn't work correctly
  • oBOXPOH  

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  @oBOXPOH So please mark this topic as SOLVED too. Thanks!
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  SOLVED drag and drop detect source of drag fails
  • sandro4912  

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  I solved the issue the pragmatic way: class RoomMimeData : public QMimeData { Q_OBJECT public: void setRoom(Room *room); Room *room() const; private: Room *mRoom; }; void Room::mouseMoveEvent(QGraphicsSceneMouseEvent *event) { //... auto drag = new QDrag(event->widget()); auto mime = new RoomMimeData; mime->setRoom(this); drag->setMimeData(mime); //.. } void Room::dropEvent(QGraphicsSceneDragDropEvent *event) { const auto roomData = qobject_cast<const RoomMimeData *>(event->mimeData()); if(roomData && isNeighbour(roomData->room()) && roomData->imageData() == playerDraggedImage()) { enter(); update(); event->setAccepted(true); } else { event->setAccepted(false); } }
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  UNSOLVED Error while building qt 5.9 with openssl statically using VS2015
  • Antiver  

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  Had the same unresolved errors by using Visual2017, Qt5.9.8, having an own compiled static OpenSSL-libs, so this could not be the mentioned compatibility problem. Lately I found out that the unresolved was not caused by linking the Qt5Network.lib, because this was already created on the disk. The lib that caused the error was the xmlpatters-lib, and when I removed it from compiling by using -skip xmlpatterns in the config command, everythign went fine! So my final command was C:\Qt\Qt5.9.8\5.9.8\Src\configure.bat -release -static -static-runtime -prefix C:\Qt\Qt5.9.8_static_ssl −opengl desktop -skip webengine -skip xmlpatterns -nomake tests -nomake examples -openssl -openssl-linked -I C:\OpenSSL\include -L C:\OpenSSL\lib by having the three environment variables OPENSSL_LIBS, OPENSSL_LIBS_DEBUG and OPENSSL_LIBS_RELEASE already set via windows system settings. Setting them directly in the command line caused syntax errors (probably only supported by earlier Configure-versions?)
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  UNSOLVED cross compiled qt for BBB
  • Asha  

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  SOLVED Editing data in table view (row grater than 256) QSqlTableModel
  • nadamus  

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  @nadamus If you have something which now works, and the reason is the 256 rows and the fetchMore() calls I said you will need, that is good for you. I will just say that your code should have no reference to the 256 (your if(wiersz>256)) as that could change at any time and there is no need to rely/hard-code it. Nor certainly should you be "reassigning model" anywhere as you do, that is wrong and slow. I don't know where you call your function from, but it may not be the correct/best place to be doing the fetchMore() from. However, I leave this to you now.
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  UNSOLVED QTreeView - QStyledItemDelegate question
  • Lati  

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  @VRonin Nope. I also tested it without any arguments as following and still have the same error: connect(editButton, &QPushButton::clicked, this, std::bind(&ButtonDelegateTableView::pushButtonCallback, this)); void ButtonDelegateTableView::pushButtonCallback()
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  UNSOLVED Change QComboBox popup highlighted item background color
  • qt.1234  

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  @JonB i realize it will only work if the highlight is invoked using a mouse event. Whereas in by case, I am trying to change the highlight color when a signal is invoked.