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 problem to translate my App
  • Zunneh  

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  @Christian-Ehrlicher Yes of course, here is my qm File
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  UNSOLVED Saving/Restoring OAuth2 tokens
  • kshots  

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  Got the same problem. Here is the way I use ton check and get or refresh my token : void GoogleAPI::grant(bool p_synchronousGrant) { try { if (m_tokenExpiration > QDateTime::currentDateTime()) throw PFHCancelException(); quint16 port(55568); QUrl authorizationUrl("https://accounts.google.com/o/oauth2/v2/auth"); QUrl accessTokenUrl("https://www.googleapis.com/oauth2/v4/token"); QString clientId("yyyyyy"); QString password("xxxxxx"); QOAuthHttpServerReplyHandler* replyHandler = new QOAuthHttpServerReplyHandler(port, this); m_oauth2.setReplyHandler(replyHandler); m_oauth2.setAuthorizationUrl(authorizationUrl); m_oauth2.setAccessTokenUrl(accessTokenUrl); m_oauth2.setClientIdentifier(clientId); m_oauth2.setClientIdentifierSharedKey(password); m_oauth2.setScope(m_scopes.join(' ')); m_oauth2.setRefreshToken(m_refreshToken); QSignalSpy spy(this, SIGNAL(accessGranted())); if (!m_refreshToken.isEmpty()) { m_oauth2.refreshAccessToken(); } else { m_oauth2.grant(); } if (p_synchronousGrant) { if (!spy.wait(60000)) throw PFHException("Google API Connexion Timeout", ""); else logWriter.write("Google API Connexion granted"); } } catch (PFHCancelException &p_e) {} catch (PFHException &p_e) { PFHReThrow(""); } } When the code go through the grant() line, everything is fine and my access is granted well. But if i go through m_oauth2.refreshAccessToken(); I got this answer : qt.networkauth.replyhandler: Error transferring https://www.googleapis.com/oauth2/v4/token - server replied: Bad Request What's wrong with my method ?
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  UNSOLVED Tons of errors after reinstalling Qt-Creator Clang Code Model
  • pauledd  

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  UNSOLVED Append nodes to an XML file
  • russjohn834  

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  UNSOLVED Qt for Xcode
  • Ashwitha  

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  Hi floks, I was stuck with this issue for days long and now i found the solution for it luckily. Here is the fix, the Xcode project created by qmake includes a pbx file and other mak files inside the project directory which consists of all the path for files used in Xcode project. Changing all the absolute paths to relative one in the these files will allow to execute the project on different machine. cheers!!
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  UNSOLVED Vertical ScrollBar of QTableWidget not moving as expected
  • Sajeevan K  

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  Hi, Why are you setting the minimum and maximum value of the scrollbar ? These are usually calculated for your base on the model content.
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  UNSOLVED Qt MySQL Driver Mingw32-make not working
  • hobbyProgrammer  

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  @jsulm Thank you for your answer. I'm gonna retry to make the driver with this information in mind.
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  UNSOLVED How to hide borders in a QTDialog under Wayland?
  • roipoussiere  

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  UNSOLVED How to create special json format to post
  • ztencmcp  

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  @ztencmcp you may want to check/validate your JSON data with jsonlint
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  UNSOLVED How to add Sailfish OS SDK to already installed Qt 5.12?
  • bogong  

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  @bogong said in How to add Sailfish OS SDK to already installed Qt 5.12?: I've got requirements to build Qt Application that is OK for iOS/Android for Sailfish OS too. Is there option to add Sailfish OS SDK to already installed and configured Qt but not be using that is inside of Sailfish downloaded SDK? My suggestion is keep both worlds separate. I mean, you have your Qt installation where you develop and build your app for iOS/Android so install the complete Sailfish SDK (with its own Qt Creator and so on) maybe in a VM with Linux and just simply copy the code of your app to such environment and built and test for Sailfish there. Plain and simple.
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  [SOLVED] how to position Text in a QGraphicsScene
  qgraphicsscene • • youzking  

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  @bjakubb text = self.scene.addText('Hello world') text.setPos(150, 200)
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  UNSOLVED How to set the default size of column in QT Tree view with longest member of Column
  • Ayush Gupta  

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  @Ayush-Gupta If you're not prepared to go via ResizeToContents, you yourself have to measure every item in the correct font etc. and use that to set a width.
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  UNSOLVED cross compiled qt for BBB
  • Asha  

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  @Asha Deploy your app correctly (include your cross compiled Qt libraries). Looks like you have different Qt version on your device than the one you cross compiled.
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  UNSOLVED QDialog content not being translated
  • Jayant  

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  @Jayant not quite what I had in mind, Your dialogs, and how they get their text Translation is loaded correctly because the mainwindow shows up the translated text but the dialog class doesn't. Following code translates the text I was rather asking if you checked that the translatable strings for your dialog where in your *qm file and correctly assigned.
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  UNSOLVED Compiler error using saveGeometry
  • Guerrian  

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  @Guerrian Where exactly do you get this error? I doubt it is in the code you posted.
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  UNSOLVED Question About Calculator Example
  • DragonOsman  

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  Thanks for the reply. I tried to build the project in VS2019 using the Qt VS2019 Tools, but the build failed due to MSBuild errors. I hope someone on here can help me, though I may have to consult the MSDN forums too since it's about MSBuild. Gist link. I tried to build it with VS2019 normally before this as well and it failed due to linker errors. If you want me to, I could try that again. But please tell me what .lib files to link against please. Thanks.
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  UNSOLVED QGroupBox discrepancies between Linux and Win
  • willemf  

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  @SGaist that completely answers my question. I thank you for your time in answering this. Kind regards, willem
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  SOLVED Issue in Uploading Image file using post method:
  • Kira  

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  As long as there is software, there will be issues ;)
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  SOLVED Cannot add new devices (Qt-Creator)
  • pauledd  

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  Problem solved! This was a Gentoo Linux specific issue. The qt-creator gentoo package somehow sometime introduced the "remotelinux" compile flag. I missed that flag and adding devices works now with the latest qt-creator version if that flag was provided to emerge. Sorry for the inconvenience ..
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  UNSOLVED How to embed third-party apps into QT application?
  • tovax  

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  @SGaist Hi, thanks! I have created a simple demo referring to this post. Demo: EmbedExe It can start "calc.exe", and "SetWindowPos" correctly. The HWND of parent widget and child widget is right, but failed to "SetParent". Debug output: EmbedExe::onPushButtonClicked Parent window: 0xc1014 Child window: 0xb126a SetParent - ret 0x0 Could you help me please? Best Regards!
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  UNSOLVED Move QT5 application to left or right on GNOME desktop
  • JGROCHA  

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  Thank you for the feedback @SGaist If I make an application with QT Creator, it behaves well. The problem is QGIS. I'm using QGIS compiled from master. Previous versions had the same problem. I know that the problem is in QGIS, but I can't identify any kind of bindings/settings that prevents super+Left Arrow or super+Right Arrow to place the window on the left or right side.
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  UNSOLVED Intermittent problem with QItemEditorFactory in QTableView QAbstractTableModel
  • mjsmithers  

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  @mjsmithers This is an atrocity. That's a harsh comment. @VRonin speaks his mind! :) I have been doing something like you wrt DisplayRole (though only for data(), not for setData()) and the string formatting of numerics. I see that @VRonin has linked to that thread, where he replied to me on this issue, and I would advise you read through it as I have done, it's very useful. I saw it your way, but now I must accept this is not the way to do it at least with Qt's model-view, and will change over to QStyledItemDelegate in future.
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  SOLVED Passing Enum into C++ function like parameter from QML. How?
  • bogong  

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  @bogong said in Passing Enum into C++ function like parameter from QML. How?: the file name of the class should be lower case if you using it in cross-platform application The reason for this is that some file systems are case sensitive (Linux/UNIX) and some other not (Windows). So, it is a good idea to always use one naming convention for file names (like lower case). But as @KroMignon mentioned it is just a convention.
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  UNSOLVED Worker thread emits signals sometimes faster than main thread handles them. Where are they cached?
  • cdwijs  

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  @jsulm Point taken. But if the signal/slot would not block until "available memory full", while you suggest a semaphore mechanism which will block sooner or require the OP to implement his own queuing, then (politely from me!) perhaps you should mention that to the OP. The other thing, should I understand correctly, is that the OP is saying there will be intermittent periods when his slot-loop will be unable to service requests, but will then resume. This could mean that it is able to keep up provided there is queuing, as supplied by signal/slot, but with no queue in the semaphore case it will not. I am wishing to draw his attention to that.
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  UNSOLVED QTemporaryFile: file not being created in Qt 5.11/5.12
  • Aritz  

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  @JonB It was me. I copied the text from the 5.10 changelog :)
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  UNSOLVED could not run QtBluetooth example(btscanner) properly
  • Mihan  

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  I don't know. I've never run this through a VM. Perhaps Windows is "stealing" these devices before your VM manager gets a chance to forward them to Linux? Are all these devices visible in system bluetooth app?
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  UNSOLVED QWinWidget display to display Qt widget on MFC window
  • EmmanuelC  

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  @mrjj I am using Qt 5.12.3. So it might be the problem? Do you think I should try an older version like Qt 5.8?
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  UNSOLVED qt5.10.1 qdebug no output
  • small_bird  

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  @aha_1980 Thanks for your reminding, I'd close this topic.
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  UNSOLVED Paths Qt uses
  • Colins2  

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  @Colins2 just a shot in the dark, but try disabling the ClangCodeModel plugin. May speed up qt creator
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  UNSOLVED Can I host QT based apps on DigitalOcean cloud servers.?
  • MariaWilliams  

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  @SGaist Thanks for your response. I wanted to host application itself on digitalOcean dedicated server. But, you made it very clear that what I am thinking is not possible . QT stands for Apple's QuickTime which is not what you are currently developing with. and I was planning to build cross software on that. However, I passed that project to someone else. So, It is all good between me and my client.
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  UNSOLVED qmake -project -tp vc Project ERROR: Cannot run compiler 'g++'.
  • ellaine  

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  @ellaine You should make sure qmake you're calling is the one from Visua Studio Qt, not MinGW Qt. Use an absolute path.
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  UNSOLVED Can I control the function keys of key through qt Application?
  • Mijaz  

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  @Mijaz I'm quite sure you can't do this in Qt as Ctrl-Alt-Fx is handled by the OS. You will need to do it on OS level: https://askubuntu.com/questions/357039/how-do-i-disable-virtual-consoles-tty1-6
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  UNSOLVED Qt 4 QTabBar paintEvent Problem
  • qtross  

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  Hi, What version of Qt are you using ? On what OS ? AFAIR, there's no fusion style for Qt 4 and styles are free to ignore palette elements. On a side note, Qt 4 has reached end of life a long time ago so there's likely little that can be done if it's a bug there.
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  UNSOLVED QStandardPaths mac appstore
  qstandardpaths mac app store • • Kudaiv  

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  Hi, What is your issue exactly ? IIRC, sandboxed applications don't have the same level of access to the system's filesystem.
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  UNSOLVED Qt Frameless Transparent Window in System Tray for Ubuntu 19.04
  • anshah  

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  @SGaist I'm using Qt 5.12.2 which is included in the apt-get repo for Ubuntu 19.04.
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  SOLVED QtKNX - Compilation errors out of the box
  qtknx knx • • Joel Bodenmann  

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  @SGaist said in QtKNX - Compilation errors out of the box: AFAIK, there's no master branch, did you mean dev ? Yep! @aha_1980 said in QtKNX - Compilation errors out of the box: @Joel-Bodenmann try the one matching your Qt version. Well that was a good recommendation :p After checking out the branch that matched my Qt version and ensuring that QtCreator/QMake can find my perl binary, I was able to build without any issues!
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  UNSOLVED Restore/Preserve QDockWidget's geometry/size
  • soma_yarram  

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  Hi, @soma_yarram said in Restore/Preserve QDockWidget's geometry/size: FYI: I tried QDockWidget::restoreGeometry(...) after showing new QDockWidget's, but it did not work. Did you gave an objectName (as explained in the QMainWindow::saveState ) to all your QDockWidget to be restored ?
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  UNSOLVED QGraphicScene/QGraphicsWidget: How to do complex movements over several Widgets
  • sandro4912  

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  Hi, That's something you should rather do at the QGraphicsView level since it's what is showing your Rooms. You will likely be interested in the mouseMoveEvent and friends.