Qt 6

@JohanSolo said in There has a the difference about QTransform between qt5 and qt6, How can I do?: if and only if its determinant is different from zero, Yeah, forgot the not, thx & fixed

Occasionally I have seen tiny font on Windows with our own Qt application. This was always fixed by rebooting Windows.

@Gracy The question is pretty old, but i know the answer... First, make sure, the permissions are added. Maybe you are missing the following: https://doc.qt.io/qtcreator/creator-deploying-android.html#editing-manifest-files To check and request permissions you can do: QFuture permission_request = QtAndroidPrivate::requestPermission("android.permission.WRITE_EXTERNAL_STORAGE"); switch(permission_request.result()) { case QtAndroidPrivate::Undetermined: qWarning() << "Permission for writing to the storage undetermined!"; break; case QtAndroidPrivate::Authorized: qDebug() << "Permission for writing to the storage authorized"; break; case QtAndroidPrivate::Denied: qWarning() << "Permission for writing to the storage denied!"; break; }

Hi @eric_1994 It's interesting that you say the Kvaser device is working. Which CAN plugin do you use for that? Regarding your Vector problem: Is there anything you can do from the Vector API side (like creating a log of API calls) or do you think you could debug the Qt plugin? One question that is still unanswered: Can you send from the Qt CAN Example?

Could not find a package configuration file provided by "Qt6HostInfo" with any of the following names:

@Axel-Spoerl said in Build error on qt 6.8: gcc --version it say: gcc (GCC) 13.2.1 20240316 (Red Hat 13.2.1-7) Copyright (C) 2023 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Oops! That was right under my nose, but I still managed to miss it. Many thanks, good sir!

running into this issue years later... for me the line find_package(Qt6 QUIET COMPONENTS Core Gui Widgets Multimedia MultimediaWidgets) will NOT populate the version numbers, only repeating with find_package(QT NAMES Qt6) will finally do.

Thank you very much.

Hi, You realize that using all this static stuff is a really good start to a pretty nightmarish maintenance and debugging experience ?

@JonB Yea, I thought writing a dock/taskbar "Waybar replacement" might be a fun weekend project and a chance to get back into C++ and learn Qt. I never imagined this rabbit hole. Anyway, I guess Wayland is still [relatively?] new and hopefully there will be solutions for these use cases as more major distros go Wayland native. It does give me respect for those implementing entire desktop environments such as KDE Plasma on Wayland since it's now clear all the fire hoops they have to jump through to get this stuff working.

@SandSnip3r said in Qt Graphs. Building 2d plot using c++ only.: Isn't the Graphs moved out of technical preview as of 6.8? Should be but as you can see from OPs question QGraphsView, the C++ API to access the QML backend is mentioned in the documentation but not implemented nor it has it's own documentation page... the links lead to nowhere... :( Maybe use the QML interface for now and handle it like any other hybrid QML/C++ app QGraphs should be 2D and 3D + C++ and QML... but not everything seem to work right now.

@mrkprdo Sorry, my bad. I fixed it.

@hdugzx I never used Design Studio, but there should be a menu like "View" or "Windows". Look in "..." in the top-right corner. You also can check the settings. In QtCreator you can disable/enable menu by pressing Ctrl-Alt-m - maybe it also works in Design Studio.

The documentation is quite clear: by default this property is false. There's no reason to pre-fill the background if you are going to fully paint it anyway.

@Shankarlinga-M thanks for your input! The use case is basically a container class, with - almost only -, readOnly access from outside. It will be read from user provided files during runtime and exist until a new set is read or the program is closed. The objects are created and "stored" in a List/Vector to be passed to where they are need to be read. So the list should per design choice be immutable. And I would like to enforce it. The default move assignment operator is deleted due to const members, so thats out too. Looks so far, as if the cleanest way would be using std::vector. Not sure how much refactor/extra work that will be :(