3rd Party Software

• 

  UNSOLVED PDFhummus error: PDFWriter.h: No such file or directory. I need help to use PDFhummus with QT Creator
  • ronaldon  

  26
  0
  Votes
  26
  Posts
  353
  Views

  

  @ronaldon You cannot link mixing compilers. MinGW produces .a libraries. MSVC produces .lib libraries. You need to pick one of the two compilers and compile both your own code and third-party code with the same compiler toolchain.
• 

  UNSOLVED Install Opencv and QT (no tutorial worked yet)
  • tim5  

  2
  0
  Votes
  2
  Posts
  22
  Views

  

  Hi, Did you ensure that you were using OpenCV and Qt built with the same compiler ?
• 

  This topic is deleted!
  • tim5  

  2
  0
  Votes
  2
  Posts
  2
  Views
• 

  UNSOLVED Include cpr library
  • YoussofAttallah  

  7
  0
  Votes
  7
  Posts
  47
  Views

  

  Also note that Qt Creator gains some direct support for vcpkg only in the next upcoming release: https://www.qt.io/blog/qt-creator-cmake-package-manager-auto-setup
• 

  UNSOLVED Trying to cmake Qmsgpack library but i get an error
  • Kris Revi  

  2
  0
  Votes
  2
  Posts
  13
  Views

  

  Hi, Where is it installed in your system ? Did you point CMake to your Qt's cmake files ?
• 

  SOLVED Install Gstreamer 1.18.3 on Qt 5.15, Win7, Mingw 8.1
  • Charon117  

  9
  0
  Votes
  9
  Posts
  157
  Views

  

  I slightly tested it, and the library seems to work as intended. You will have to refactor tutorial examples into C++, as gstreamer is written in C. Again, here are the installation steps for gstreamer 1.18.3 for Qt 5.15 on win7 64 bit with mingw 8.1: Download and install gstreamer-1.0-devel-mingw-x86_64-1.18.3.msi and gstreamer-1.0-mingw-x86_64-1.18.3.msi. Add INCLUDEPATH += "C:\gstreamer\1.0\mingw_x86_64\include\gstreamer-1.0" INCLUDEPATH += "C:\gstreamer\1.0\mingw_x86_64\include\glib-2.0" INCLUDEPATH += "C:\gstreamer\1.0\mingw_x86_64\lib\glib-2.0\include" LIBS += "C:/gstreamer/1.0/mingw_x86_64/lib/gstreamer-1.0.lib" to your qmake (.pro) file. Add the C:\gstreamer\1.0\mingw_x86_64\bin path to the projects > Run > Environment > PATH variable in qt creator. That looks like a working setup for me. Thanks to @SGaist for helping solving this problem for me, all props to him :). Thank you very much.
• 

  SOLVED TLS initialization failed only on a particular machine
  • fsinisi  

  12
  0
  Votes
  12
  Posts
  229
  Views

  

  @artwaw Thanks for the tip! In this particular case, I think the problem was related to the version because it started to work after updating to OpenSSL 1.1.1j instead of the version that comes with Qt 5.15.0 (which I think is OpenSSL 1.1.1g but I'm not sure now). I compiled the libraries myself following the official guide which uses MSVC: https://github.com/openssl/openssl/blob/master/NOTES-WINDOWS.md Anyway, your suggestion makes sense and it is definitely something to try as well if anyone has problems.
• 

  UNSOLVED Custom Data validation for Qt
  form extension validation validator qtformvalidator • • Cocojambo  

  4
  3
  Votes
  4
  Posts
  77
  Views

  

  @Cocojambo said in Custom Data validation for Qt: @sierdzio Well you have puzzled me a bit :) Never thought about a license type but I think it should be the Apache License 2.0 I have added LICENSE file into the project. Thank you. Sounds good! I had to ask because of copyright law, if there is no license, nobody can legally use the code (even if it is available on github).
• 

  This topic is deleted!
  • tiagodinis33  

  2
  0
  Votes
  2
  Posts
  24
  Views
• 

  UNSOLVED GammaRay: How to use the client
  • DiegoDonate  

  1
  0
  Votes
  1
  Posts
  50
  Views

  No one has replied

• 

  UNSOLVED QWT problem installing as a plugin in CT - doesn't show up.
  • stdave  

  8
  0
  Votes
  8
  Posts
  126
  Views

  

  @jsulm said in QWT problem installing as a plugin in CT - doesn't show up.: @stdave said in QWT problem installing as a plugin in CT - doesn't show up.: but how do I match my QWT compiile to my QT Version? Install Qt 5.15.2 (MSVC 2019, 64 Bit) and build QWT with that Qt version and MSVC2019. I have followed your suggestion here. The problem I appear to be having is that qmake creates a Makefile that compiles (and installs) fine with mingw32-make, but gives a couple errors when compiled with nmake or with jom (when executed from the shell within MSVC2019.) The ./src/Makefile.Release and ./src/Makefile.Debug files both have these errors at like 14 and 15; CC = @echo compiling $< && gcc CXX = @echo compiling $< && g++ Simply removing the "$<" gets the compiler (both of them) on their way. There appears to be another problem further into the compile, which I believe is caused by another error in the Makefile which causes this error message; moc qwt_dyngrid_layout.h The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_dyngrid_layout.cpp] Error 1 moc qwt_magnifier.h The filename, directory name, or volume label syntax is incorrect. moc qwt_panner.h jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_magnifier.cpp] Error 1 The filename, directory name, or volume label syntax is incorrect. moc qwt_picker.h The filename, directory name, or volume label syntax is incorrect. moc qwt_text_label.h jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_panner.cpp] Error 1 The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_picker.cpp] Error 1 jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Release [moc\moc_qwt_text_label.cpp] Error 1 jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile [release-all] Error 2 C:\Qt\Tools\QtCreator\bin\jom.exe -f Makefile.Debug all The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Debug [moc\moc_qwt_dyngrid_layout.cpp] Error 1 The filename, directory name, or volume label syntax is incorrect. The filename, directory name, or volume label syntax is incorrect. jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Debug [moc\moc_qwt_magnifier.cpp] Error 1 jom: C:\Users\david\Downloads\qwt-6.1.6b\qwt-6.1.6\src\Makefile.Debug [moc\moc_qwt_panner.cpp] Error 1 moc qwt_dyngrid_layout.h moc qwt_magnifier.h moc qwt_panner.h moc qwt_picker.h (above error is actually from jom becuase it outputs more info, but both compilers seems to get hung up in the same spot. The characters "$<" that I noted caused the first error output mentioned; NMAKE : warning U4006: special macro undefined : '$<' which allowed smooth compiling when removed - I noticed this as a problem others were also having with the same strange characters in their Makefile when encountering the nmake or jom error sited. Right now I am wondering about either just correcting the errors in the Makefiles, or getting a different qmake which may hopefully produce problem free Makefiles.
• 

  SOLVED Pylon in Qt compilation issues
  • hodahle  

  10
  0
  Votes
  10
  Posts
  576
  Views

  

  @hodahle I have the same issue. My development environment is Qt Version 5.15.0. My application is written in C++ and will be compiled in Qt creator using MinGW/gcc compiler. I installed pylon 6.1.1 Camera Software Suite Windows in developer mode. I want to integrate it with our development environment to see if our application will include the libraries and successfully build and run. I don't have the camera yet but I think that it should be possible to get to this point where the application will successfully build and run with few calls to simple APIs. I'm stuck. How did you get it working by using Runtime package instead of complete SDK Package (pylon X.x.x Camera Software Suite Windows)? Also can you please provide more information and if possible, can you please attach a screenshot of your .pro file?
• 

  UNSOLVED Which qmake exe?
  • spiritsoft  

  9
  0
  Votes
  9
  Posts
  134
  Views

  

  @Pablo-J-Rogina This one
• 

  UNSOLVED Open-source Docking Windows, Ribbon(like) Bar, Components and more.
  • fizzyade  

  1
  1
  Votes
  1
  Posts
  100
  Views

  No one has replied

• 

  UNSOLVED javascriptcore.pri file is missing
  custom plugin • • billthebiker  

  1
  0
  Votes
  1
  Posts
  65
  Views

  No one has replied

• 

  This topic is deleted!
  • jusinyah  

  1
  0
  Votes
  1
  Posts
  1
  Views

  No one has replied

• 

  UNSOLVED Setting QT_USE_NATIVE_WINDOWS env var, makes the QWidget window to render in black
  • atali  

  1
  0
  Votes
  1
  Posts
  93
  Views

  No one has replied

• 

  UNSOLVED "This Application failed to start because it could not find or load the Qt platform plugin "windows in "".
  • Spookr.  

  9
  0
  Votes
  9
  Posts
  239
  Views

  

  @Spookr Set the variable in a Command Prompt. Run your application from the Command Prompt. Look at the diagnostic output you now receive in the Command Prompt.
• 

  UNSOLVED Which OpenGL implementation is my Qt Quick app using?
  • OpenCoder  

  1
  0
  Votes
  1
  Posts
  55
  Views

  No one has replied

• 

  UNSOLVED qt.qpa.screen: QXcbConnection: Could not connect to display. Could not connect to any X display.
  • krist  

  5
  0
  Votes
  5
  Posts
  13252
  Views

  

  ssh add parameter -X for example: ssh jz@172.19.3.192 -X
• 

  UNSOLVED QT and OpenCascade
  • JRomero  

  6
  0
  Votes
  6
  Posts
  401
  Views

  

  Replying to myself, in case someone else has this problem in the future. I've started the VS debugger from the command line, thanks to the tip from SO devenv /debugexe 'program name' 'program arguments' Executing the app from within Visual Studio gave error messages that freetype.dll and FreeImage.dll were missing. After adjusting the PATH variable to point to those dll's, everything works now.
• 

  UNSOLVED CryptoPP in Qt Creator
  • EaccB  

  7
  0
  Votes
  7
  Posts
  125
  Views

  

  Was it MT before ? If so, you can't mix libraries built with the static and dynamic runtime.
• 

  UNSOLVED Usage of the Qt's layout system logic
  • brkonator  

  2
  0
  Votes
  2
  Posts
  74
  Views

  

  Hi, That's likely a question better asked to a lawyer which I am not. My thoughts is that you should clearly attribute the code you are copying as well as its licenses and also be ready for breakage because since you are pillaging the private implementation it may change at any time.
• 

  UNSOLVED qtopcua 5.14 openssl errors after uptate
  • PawelW  

  9
  0
  Votes
  9
  Posts
  291
  Views

  

  They should be in sync unless you have additional patches. With the new operating model there will indeed be a difference at some point.
• 

  UNSOLVED Clazy complaining about detaching on temporary
  clazy • • Eukaryote  

  5
  0
  Votes
  5
  Posts
  211
  Views

  

  @SGaist Thanks for your reply The problem with using a variable is polluting code with variables and it's more natural to call a method directly in a loop so many developers are doing this without thinking too much. It's fine for not Qt containers. Making signature const QList<Element> getElems() seems to solve the issue with clazy at least. Is this a good solution? The general goal is to use as many structures in a consistent way as possible. It makes the code clearer and easier to read and write.
• 

  SOLVED Qt Application using Gstreamer works only with root privileges
  • Fal92  

  2
  0
  Votes
  2
  Posts
  78
  Views

  

  Solved: if anyone encounters the same issue there's the solution that worked for me. delete the following file in the cache: rm ~/.cache/gstreamer-1.0 registry.x86_64.bin and then run: gst-inspect-1.0 to regenerate it. now the plugins are visible and usable by all users.
• 

  SOLVED QCA for file encryption
  • Deedss  

  10
  0
  Votes
  10
  Posts
  473
  Views

  

  @Pablo-J-Rogina @Deedss You could also check the max number of bytes you can encrypt .. qDebug() << publicKey.maximumEncryptSize(QCA::EME_PKCS1_OAEP); which gives , on my env 470 So you cant encrypt anything larger .. and I don't know any method to increase that limit. I think you dont need to use for data encryption. public key is good to use for encrypting key for a symmetric scheme that encrypts files. If you really are limited to RSA keys .. given the JSON input .. best thing you can do, may be is split JSON to individual values .. and encrypt each ..
• 

  UNSOLVED QCA building errors for OpenSSL
  • mikkel1156  

  9
  0
  Votes
  9
  Posts
  2693
  Views

  

  @mikkel1156 The right way to get against policy CMP0026 warnings .. which also can appear as errors on newer Cmake versions is by setting: cmake_policy(SET CMP0026 OLD) this should be done at least in qca\cmake\modules\QcaMacro.cmake
• 

  SOLVED QT and Matlab
  • alberto.brunero  

  10
  0
  Votes
  10
  Posts
  1094
  Views

  

  I have the same problem. what is the the solution. Thanks. I tried LIBS += "C:/Program Files/MATLAB/R2019b/extern/lib/win64/mingw64/libeng.lib" and LIBS += -L"C:/Program Files/MATLAB/R2019b/extern/lib/win64/mingw64/" -llibeng and still not worked
• 

  SOLVED How to build the 3rd party libraries in Qt's source code?
  • Diracsbracket  

  4
  0
  Votes
  4
  Posts
  145
  Views

  

  @jsulm I applied the patch and rebuild the whole thing (since I don't know how to build qtbase alone using configure), and that solves the problem. Also, the patch seems to have been applied in version Qt5.15.2 as the updated comment of QTBUG-86704 indicates. However, remote debugging on the Pi 4 is not really stable it seems, possibly due to a buggy PiOS/Raspbian GDB implementation.
• 

  UNSOLVED QtGstreamer 1.0 not working with qt 5.14
  qt5.11 qtgstreamer qt5.14 • • Savita1987  

  5
  0
  Votes
  5
  Posts
  111
  Views

  

  Hi and welcome to devnet, QtGStreamer is unmaintained. Depending on what you want to do, you can use the custom pipeline option of QMediaPlayer::setMedia.
• 

  SOLVED how to use (pulseaudio) system-libraries in a new QT Program
  c++ library pulseaudio • • Ebiko  

  7
  0
  Votes
  7
  Posts
  256
  Views

  

  @jsulm thank you really much - now i can really start to learn/write :D
• 

  UNSOLVED Open-source audio player library
  • UnitScan  

  7
  0
  Votes
  7
  Posts
  140
  Views

  

  It was several years ago, but I was able to get a cross-platform (macos, windows) desktop application successfully playing audio with: libsndfile http://www.mega-nerd.com/libsndfile/ PortAudio http://www.portaudio.com/usinggit.html Not sure if anyone urgently needs to parse mp3 files anymore, but note that libsndfile still does not handle mp3: http://www.mega-nerd.com/libsndfile/FAQ.html#Q020 (as of Nov 2020)
• 

  SOLVED QwtPlot set curve samples error
  • zedhzelgc  

  4
  0
  Votes
  4
  Posts
  180
  Views

  

  @zedhzelgc said in QwtPlot set curve samples error: Thank you very much! I have changed the code so that when I finish the QFutureWatcher sends a signal to a GUI thread slot. This slot updates the data with setSamples () and makes the graph replot. I didn't get the error again. In other occasions I have done it directly from the QFuture and I haven't received any error but knowing that the setSamples() is related to GUI and not only updates series data it is better to do it from the GUI thread. setSamples does not lead to any updates of the GUI - beside the autoReplot flag has been set. But there might be races, when changing the samples while the update process is mapping the samples into paint device coordinates. You could derive from QwtSeriesData and add an mutex there in case concurrent access is important.
• 

  This topic is deleted!
  • UnitScan  

  9
  0
  Votes
  9
  Posts
  48
  Views
• 

  SOLVED Building a 3rd party lib
  • ODБOï  

  7
  0
  Votes
  7
  Posts
  234
  Views

  

  @SGaist said in Building a 3rd party lib: It means that what's between the curly brackets apply only to Unix like OS like Linux and macOS. Since you are building on Windows, that part is going to be ignored. Yes i got it, my bad for not noticing that Thank you.
• 

  UNSOLVED What software can be used to create offline satellite image tiles for use in Qt plugin
  • MikeWazowski18  

  1
  0
  Votes
  1
  Posts
  124
  Views

  No one has replied

• 

  UNSOLVED Using Capnproto with QTcpSocket
  • steinito  

  3
  0
  Votes
  3
  Posts
  221
  Views

  

  Hi, I cannot show my project as it is proprietary, but you can implement it exactly as I described above. Simplest form, just create the override in the same header to the class you have your socket, then just create a socket as you normally would, pass it into a BufferedInputStreamWrapper as I showed, and then you connect readyRead to whatever function you want to parse your data and call the ::capnp::PackedMessageReader reader(*bufferedInputStreamWrapper); in that function. This only works if the amount of data you are sending is small and doesn't trigger multiple readyReads, which I painfully found out the hard way. I have not yet made a KJ eventloop integration, as I don't really know how. I will honestly most likely abandon QTcpSocket for this project and use another socket library, like Poco where this is not an issue.
• 

  UNSOLVED Linaro GDB with Qt Creator?
  • Szymon. M. Sabat  

  1
  0
  Votes
  1
  Posts
  143
  Views

  No one has replied

• 

  UNSOLVED Unable to render QImage transparent on OGRE, When Transition from Qt 4.x to Qt5 with OGRE 1.8.0 to 1.11.6
  • sg33  

  4
  0
  Votes
  4
  Posts
  218
  Views

  

  Not directly but you can use QWidget::createWindowContainer.