Qt 6

@BugSleeper said in Qt Graphs. Building 2d plot using c++ only.: I'm GH's student, We're using a same computer! This explains it. Thx. We have a lot of really interesting spam in the last weeks so this was somewhat suspicious.

now its failing due to: FAILED: v8_context_snapshot_generator "<>/python-3.8.1-rh7/bin/python3" "<>/qtwebengine/src/3rdparty/chromium/build/toolchain/gcc_link_wrapper.py" --output="./v8_context_snapshot_generator" -- <>/gcc-10.3.0-rocky8/bin/g++ -Wl,--build-id=sha1 -fPIC -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -m64 -Wl,-O2 -Wl,--gc-sections -Wl,-z,defs -Wl,--as-needed -rdynamic -pie -Wl,--disable-new-dtags -L<>/rocky8/harfbuzz-11.3.3/lib64 -o "./v8_context_snapshot_generator" -Wl,--start-group @"./v8_context_snapshot_generator.rsp" -Wl,--end-group -latomic -ldl -lpthread -lrt -lsmime3 -lnss3 -lnssutil3 -lplds4 -lplc4 -lnspr4 -lresolv -ljpeg -lpng16 -lz -lxml2 -lxslt -lm -lexpat -lfreetype -lfontconfig -lharfbuzz-subset -lharfbuzz -ldbus-1 -ldrm -lasound -ludev -Wl,--start-group -Wl,--end-group <>/qt/build/qtwebengine/src/core/Release/x86_64/obj/third_party/blink/renderer/modules/app_banner/libapp_banner.a: error adding symbols: Malformed archive collect2: error: ld returned 1 exit status

@JonB read post more once and did through qml thanks an answer

@DevWinDemon I also use msys2 ucrt64 qt6, may be you can make things better follow these approaches. Copy your exe file into a release directory. Make and run msys2qtdeployplus under the same env, such as mingw64 bash or ucrt64 bash, everything will be ok. the msys2qtdeployplus will do : (1) Call windeployqt5/6 for every exe and dlls in the release dir, and, extra dep dir as needed. (2) Repeatly call ldd/ntldd for each dlls in the release dir, copy extra dependcies from msys64/ucrt64 bin dirs to the release dir. (3) If there were no more extra dlls be copied, goto (4), else, repeat , goto (2) (4) Finished. Before this approach, please make sure that ldd /ntldd, windeployqt5 or 6 has been installed by pacman -S, in your env, such as ucrt64. Repeatly calling ldd/ntldd is very important, for example, Qt SQL psql plugin need libpq, but libpq also has its' own deps, libcrypto.dll and so on. [image: f22d9cd9-76c2-494c-9742-8f8b6efd1078.png] Call upx tool with "find -exec", for every dll and exe in release dir, using lzma and deep trim switchers, that can significantly reduce the files size. upx can be installed by pacman -S.

@Volodymyr-Mudryk Boot2Qt is commercial software, so you can ask QtCompany directly for support

@Christian-Ehrlicher Added a link and a quote in the commentary to the report

@raulgd It helps to identify the purpose and composition of each channel. This forum is a community forum for Qt users to help each other to use the existing Qt API. Questions are mainly answered by community volunteers in their spare time. The Development mailing list (https://lists.qt-project.org/listinfo/development) is where stakeholders discuss the details of implementing new features in the Qt framework itself (such as Apple Liquid Glass styling). The Support Center (https://account.qt.io/s/support-center) is where commercial license holders can talk to support engineers whose job is to provide technical support for Qt Company customers. getting replies from someone from Qt @jsulm is a community member who is unaffiliated with the Qt Company. Anyway, as for your original question, please see https://forum.qt.io/topic/162394/qt-and-apple-glass-ui-in-macos-26/9 (Tor Arne is an engineer from the Qt Company)

@servant-0 said in 50 signal/slots: I setup the 50 signals to emit their object name as a QString and call findChild on it to update the text on a label in the slot All as @J.Hilk has written about findChild(). Also it depends hugely on whether your target widget is "close" in the hierarchy to the widget you call findChild() on. If that is "high up" it has a lot of searching to do if there are a lot of descendent widgets. It sounds like you have a backend data layer which emits a signal when it changes and passes the value of what will be used as a widget's objectName() to indicate which widget to update? If so that is not ideal for decoupling data from UI. You might like to look at QDataWidgetMapper for a means of tying widgets to data values (works in both directions, though you may only need data->widget direction). For that you would store your data values in anything derived from a QAbstractItemModel and any time that data changes internally a signal is sent and the corresponding widget is updated (without lookup).

These dlls are installed in the same directory as the release dlls - <QTDIR>\version<compiler_type>\bin

Hello, before using ->setCurrentWidget(), you can check if that widget is already contained in that stack widget or not. you can m_centralStackedWidget->indexOf(m_windowSplitter) to find out if the widget is present in the stackwidget or not, it will return "-1" if the widget is not present in stackwidget

@Teg-Miles It's not so much that QProcess "wasn't created for threading", it's that there is no need (and only added complexity) to use threads to run the the processes since another process is asynchronous anyway. It won't even use any calling threads you might create anyway, as soon as a sub-process runs it is in its own thread/process anyway, not the one which ran it. No, ps will not be faster than, say, reading from /proc yourself as that is what it will be doing anyway --- it's not magic, it has to be written in C/C++ itself anyway. OTOH there is an overhead inherent in creating and running another process, plus whatever IPC or I/O you do to get its data back. That will be true on Windows too. I assume Get-Process is a PowerShell command a bit like ps? So again that is just one way you could call it. There will also be Windows own system calls to get information about other processes, and calling those yourself from C/C++ will get better performance. But finding out how to do this in Linux/Windows/MacOS may be something you don't want to do and you find running some command on each OS and reading its output is what you prefer for a simple, non-commercial program.

You can use qDebug to print your application's font information.

@Cruzmatt22 I do have WinAero Tweaker installed but System Font is set to default. Also the command line parameter did work. I was hoping there was some sort global fix.

@DevWinDemon said in The code execution cannot proceed because Qt6Core.dll was not found. Reinstalling the program may fix this problem.: I work 2 years like this on qt 5.15.16 Nobody hinders you to make it work the same with Qt6 - simply put it in the PATH env var as you did for Qt5. Please stop insulting people for things neither we nor Qt can do against - that's how a library search path on windows works (and also on linux there is a similar thing). So learn on how library search is working on your platform. But maybe your russia os has a better solution for this...

Thanks @Paul-Colby This was helpful.

Are you setting the CMAKE_PREFIX_PATH variable to point to the Qt version you want to use ?

@SGaist sure will do that ...

I tried, I ran in release mode and used windeployqt and had to copy additional lib files but it couldn't run and there was no notification, but if I run the program in debug mode, after the exe file is created, I can successfully run that file without having to run the windeployqt command or copy any additional lib files