Brainstorm

@AnneRanch As @artwaw has said. In that example mdichild.h has class MdiChild : public QTextEdit. If you replaced that with, say, class MdiChild : public QTabWidget you would be making the top-level widget of the subwindow be the tab widget you talked about wanting. Of course you would then have to make other changes in mdichild.h/.cpp to reflect that change.

@AnneRanch said in Image processing using Qt: It uses QML and to be honest there is not much to see how QML makes life easier. Pure opinion, but I'm purely a c++ hacker and QML always seemed like hype to me anyways. My early openCV was analysing thermal video point clouds of bats emerging from roosts after dark...and demonstrating the technical challenges of accurately counting the bats as they pass thru the frame when the customer wanted to do it on the cheap with low framerate cameras and wouldn't impose scene rules for how the emergence point should be framed. Tracking overlaying blob movement in successive frames is easy. Point clouds are way too random, especial when the point velocities can approach 70mph.

Hi and welcome to devnet, You are here on a user forum, if you want it discuss that kind of feature you should open feature request. Note that Qt Creator already does some aggregation if enabled. There's also the KUserFeedback module that might interest you.

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.

@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...

@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?

@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

@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: 

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.

@fcarney said in Another licensing question.: Possibly even if using LGPL libs Not if using shared libraries.

Hi and welcome to devnet, In what way is it related to Qt ?

@Emrecp How about a variable or if statement in either mouse over/leave event that checks if the mouse is in the second widget?

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

@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.

@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.

@Pooja-Bhusare Well @LuGRU said: You can achieve this by using libVLC or FFmpeg. and @KoLiBer said that was so helpful.

@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.

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

@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++.