Brainstorm

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  UNSOLVED Trying to get this program to work that uses `python3-qtpy` in Mobian (Debian Mobile)...
  • didymus  

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  Hi and welcome to devnet, It's partially that. It also has to do with the fact that access to the graphics server is disabled by default to the root user for security reasons.
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  • AnneRanch  

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  UNSOLVED copyavailable(), undoavailable()
  • tanim2607  

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  @tanim2607 said in copyavailable(), undoavailable(): can u correct the code for me?? It's your job. As I wrote: connect a slot to copyAvailable signal. If you have problems/don't understand something then ask concrete questions. But don't ask others to write code for you - you will hardly learn anything this way...
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  UNSOLVED Optimization for Game Launcher, need ideas
  qlistwidget custom widget qlistwidgetitem ram optimization • • Emrecp  

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  Resize the icons when loading them into memory - don't store the big ones. Also, use lazy loading (defer loading of icons and items until they are needed), using canFetchMore() and fetchMore() functions of your model.
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  UNSOLVED QT for Raspberry Pi Touch screen GUI, should I use Python or C++ ?
  • Andelo  

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  @Andelo Since Qt works with RPi, I cannot see that the choice between C++ and Python (PyQt/PySide) has anything to do with the solution. Use whichever you prefer as a programming language. What experience do you have with each one?
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  UNSOLVED Qt Data Visualization of complex numbers
  complex numbers visualisation • • ChrisMoller  

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  @ChrisMoller said in Qt Data Visualization of complex numbers: Bar, scatter, and surface graphs don't seem to be the right things for this... You're right, Qt doesn't provide something out-of-the-box for this. There is an related feature request at https://bugreports.qt.io/browse/QTBUG-82293
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  UNSOLVED How to customize groove of the QSlider Class dynamically based on values?
  • dracodraco  

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  @dracodraco said in How to customize groove of the QSlider Class dynamically based on values?: why cant i upload the image of the QSlider to the forum? This forum can't receive image uploads. Upload it to an external image host and post it here using this syntax: 
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  UNSOLVED Installation from current online installer won't open
  • Alan Mason  

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  Hi and welcome to devnet, You are likely missing some libraries. Call ldd on the plugin and you'll see what you need to add.
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  • LinhForex  

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  UNSOLVED Another licensing question.
  • g8keapor  

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  @fcarney said in Another licensing question.: Possibly even if using LGPL libs Not if using shared libraries.
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  UNSOLVED HRMS platform with Chrome extension
  • vikramoki  

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  Hi and welcome to devnet, In what way is it related to Qt ?
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  UNSOLVED 2 Widgets, when focus lost hide other
  • Emrecp  

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  @Emrecp How about a variable or if statement in either mouse over/leave event that checks if the mouse is in the second widget?
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  SOLVED How do I customize a QSlider that would work with timestamps?
  • dracodraco  

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  @dracodraco if your issue is solved, please don't forget to mark your post as such!
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  • Sylus  

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  SOLVED How to initialize a const static member?
  • mzimmers  

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  @Kent-Dorfman thanks for that link. Turns out to be a surprisingly complicated subject, doesn't it? Particularly with the changes to C++ in 11 and 17 (per the article). JonB's solution is simple, and seems to work, so I'm probably going to stick with it.
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  UNSOLVED HTTP Request with curl fails but why Firefox Developer Tools succeeds?
  • SeppyQT  

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  UNSOLVED Why isn't qt so popular
  • Developer01  

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  @jsulm said in Why isn't qt so popular: Qt is not a C++ library Lol, the passion of people. Next thing they will say is HTML is not a machine learning language...
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  UNSOLVED End-user problem: a single mouse click is interpreted as the start of dragging instead, on Mac
  • Aasasd  

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  @J-Hilk That's interesting info, thanks. I'm using an external mouse, but the machine is indeed a Macbook with the trackpad set to clicking on a tap—so I guess it might be possible that Qt processes some low-level events in a weird way. However, while I tried changing the system settings it turned out my MacOS forgot that it has a trackpad at all, and doesn't show those options even though input works fine. I don't think this new problem of mine is related to dragging-on-click since dragging-on-click is older IIRC (and occurs on Linux too, judging from the link)—but apparently I will now be fighting MacOS instead for a while, as quick googling didn't uncover anything on this topic. I also thought that I already checked if dragging-on-click persists with all input-tuning apps turned off, but perhaps I misremembered. Will report after I wrangle the OS and make it behave properly.
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  UNSOLVED Need Help for Video Streaming using UDP Sockets
  • KoLiBer  

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  @Pooja-Bhusare Well @LuGRU said: You can achieve this by using libVLC or FFmpeg. and @KoLiBer said that was so helpful.
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  SOLVED Translate texts read from a file
  • LeLev  

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  @LeLev said in Translate texts read from a file: Re-reading your requirements I guess you could be able to maintain (add/delete) your error strings without the need of recompiling the application. My target machine has a list of possible errors to show to the user, If those possible errors have a code (i.e. ABC123 or 123456) then you don't need the enum from @J-Hilk example, you'll use such codes as index for such std::array in the example or the key in the suggested map or whatever data structure you end up using. In that way, you can maintain the .h file with the error strings separate from the source code, and just updating the .qm file(s) whenever the strings change. Since your source code will always use an index for the error string, no re-compilation of app is needed.
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  UNSOLVED Brainstorm: Qt SSL is based on OpenSSL (C). Why not change to Botan (C++) ?
  • SeppyQT  

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  @SlySven you may want to watch BUG-76499 as the Qt developers are seeking to upgrade the API for cryptography.
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  • Chiefelives  

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  • Chiefelives  

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  • Chiefelives  

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  SOLVED Generating docx / Communicating with Word add-in
  • Asperamanca  

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  @Asperamanca, I would like to inform you that Aspose.Words for C++ is an advanced Word Document Processing API to perform a wide range of processing tasks. API provides document formatting, manipulation, mail merge, watermarking and much more capabilities directly within your own C++ applications without requiring Microsoft Word. API supports most of the Microsoft Word formats for processing. You can even integrate this native C++ API within your Qt application. I am sharing here an example cmake project which uses Qt and Aspose.Words for C++. Then please do the following steps: Download and install cmake Download and unpack Aspose.Words for C++ library Copy Aspose.Words.Cpp and CodePorting.Native.Cs2Cpp_vc14_20.3 folders next to CMakeLists.txt file Run the following command from command line: cd qthw cmake -G "Visual Studio 15 2017" -Thost=x64 -Ax64 -S . -B build -D"Qt5_DIR=<path-to-qt5>" path-to-qt5 should be something like -x:\QT\5.14.2\msvc2017_64\lib\cmake\Qt5 - path to folder with Qt5Config.cmake file It should create Visual Studio 2017 Solution with a proper setup for Qt and Aspose.Words for C++.
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  SOLVED inter-object communication
  • mzimmers  

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  OK, thanks for the input, guys. I'll continue with my current method.
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  SOLVED revealing advanced user options
  • mzimmers  

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  Thanks for the input, guys. Jon makes a good point about the need to convey this "hidden" feature to the user. That said, I might go ahead and try implementing this, simply because I can foresee a lot of good uses for the QKeyEvents. I can always go back and implement something that Jon could live with. Thanks again... EDIT: QKeyEvents aren't a great solution. It turns out that, on Windows and Linux (but not Mac), holding down keys prevents a button push from signalling. You have to press and release the keys, then push the button. Much clunkier than I'd hoped for.
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  UNSOLVED Whiteboard chat
  • kashry  

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  Does it update in real time? If it does then what events happen on one should be sent to the other. Like @eyllanesc said, those would be the "instructions" of what to draw.
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  SOLVED any Windows networking mavens out there?
  windows sockets broadcast • • mzimmers  

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  @mzimmers If i iterate over the interfaces like in your script, then it works with no problem :) Running on windows :) When using only the QHostAddress::Broadcast I get the wrong broadcast addr. I too think it is strange, but this is no issue for me, as it's always simple to determine the right address by code or manually :) just strange as you say :) Anways, off to new issues :D
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  SOLVED changing from 1:1 to 1:many
  • mzimmers  

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  Thanks for the suggestions. I'm sure I'll have more questions about implementation, but as the original issue has been answered, I'm marking this as solved.
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  UNSOLVED QJsonObject comparison
  • rosh7  

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  @JonB Thanks a lot for your insight!
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  UNSOLVED PUBLISHING A SIDE PROJECT (HOBBY PROJECT)
  • EHSUN7B  

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  @EHSUN7B If you want to publish source code also then there is nothing special to consider. If you do not want to deliver source code then use LGPL license for Qt and use Qt shared libraries. When using static Qt libraries you have to be prepared to give the users the object files so they can relink the app against their own Qt libs. Note: I'm not a lawyer.
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  UNSOLVED deterministic free store using memory pools
  • Kent-Dorfman  

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  @Konstantin-Tokarev I think you're saying I'm wrong and then restating exactly what I wrote in the first place? The default allocator reverts to the default heap manager and I'm well aware that it can be overriden, as I mentioned that as a potential strategy. so yes, it is implicit in the default STL. Normally I stay well away from boost. Historically the lack of real boost documentation and frequently changing interfaces have left me severely jaded where boost is concerned. If/when something from boost finds its way into the standard then I'm more likely to give it a whirl, but I may take a look at their pool allocators. Thanks!
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  UNSOLVED Replace DLL name and DLL dependecy
  • addebito  

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  @aha_1980 Thank you for your kind reply and.... you are right, is not enough replace the name of the linked dll.
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  UNSOLVED General Open Source Software License Question
  • SeppyQT  

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  Does it satisfy the requirements for BSD and MIT? I mean it is easy to find. Who does not know "Help > About" ? at first you will see a list of all third party libraries. You can look how other companies (like Apple, Google, or, surprise, Qt itself) are handling 3rd-party BSD/MIT licensed code. It may be buried deep down in app or documentation and it's still ok because persistent user can find it. But If I changed it I would have released them as open source under the same License. BSD and MIT allow any modifications in code without requirement to publish them, as long as you comply with their terms. Read licenses, they are very concise..