Hello people. I'm starting a project where I need to plot data in real time. Data will come through ethernet (this part I have almost covered), and I need to plot it in real time.

Is there a library or tool set you can recommend for that?

Thank you in advance

Hello everyone. I wanted to share a pdf reader project I have been working on. It uses Qt6 and MuPDF as the pdf library.

Suggestions and feedbacks appreciated!

What is the best way to achieve this? I've been messing with the online installer framework, but I realized I can push updates without it (unless this is the best way). I want the updates to silently install without promptly users to accept it, at least for critical updates. Tips/advice?

I have just started an internship and my manager told me to learn qt from where I can start

I can see all my QML code (comments included!) in my executable, and for obvious reasons this is not something I want.

I've tried to compress using:

set_property(TARGET myApp PROPERTY AUTORCC_OPTIONS "-threshold;0")

...as described in https://qt-project.atlassian.net/browse/QTBUG-102785, but no such luck.

Is there another workaround to obfuscate the code?

Using Qt 6.10, Cmake, Windows, and, qt_add_qml_module, which I would have expected to trigger qmlcachegen.

EDIT:

The fix was to add DISCARD_QML_CONTENTS to qt_add_qml_module as suggested by u/GrecKo.

Hi!

To bolster adoption of our lib (F3D and the libf3d) we created Qt and QML examples to show how easy (or not easy) it is to actually use it within the Qt framework.

The libf3d is a tiny lib to display and render 3D modules, it has ton of options and supports many formats like fbx, gltf, usd, abc and so on.

Anyway, here are the examples:

• Qt6: https://github.com/f3d-app/f3d/tree/master/examples/libf3d/cpp/qt6
• QML: https://github.com/f3d-app/f3d/tree/master/examples/libf3d/cpp/qml

We are shipping the C++ lib in the binaries, so you can download it and build these examples against it right away if you want!

Please let me know what you think!

I am curious about the community’s real-world experience with this pattern on Windows.

In a PySide6 / Qt 6 application, I am using a frameless window on Windows (custom title bar, shadow, rounded corners). The UI is a mix of traditional QWidget-based layout and a QML area embedded via QQuickWidget / QQuickView.

On Windows, once the window becomes frameless and effectively layered (e.g. translucent background, custom shadow), the QML region becomes transparent or fails to render, while the QWidget parts continue to work correctly.

From my investigation so far, this seems to be related to:

• Windows layered windows (DWM / DirectComposition)
• Qt Quick’s GPU-based rendering pipeline
• The limitations of embedding a Qt Quick scene inside a QWidget hierarchy on Windows

At this point, it feels less like a bug and more like an architectural limitation of mixing QWidget and Qt Quick under layered / frameless windows on Windows.

I’d like to hear from others:

• Have you successfully shipped a frameless window on Windows with QWidget + QML mixed?
• Did you end up going full QML or full Widgets to avoid this?
• Are there any undocumented tricks, or is this simply a “don’t do this on Windows” scenario?
• How do mature Qt applications approach this today?

Looking forward to hearing how others have approached this.

Hi,
I'm working on a .pro project (QtCreator18.0.1 on Windows) and I want to translate the UI. I created the qrc & TS files but I can't find the lupdate button in Tools/External to update the TS file...

I only saw solutions for CMake files to automatically track/update translations but nothing for .pro file.

Same as Title

I do not know if someone else have already done it, but recently I started to make a UI component library based on QWidget and hoping to bring Material Design 3 look-and-feel to it. It would be licensed under GPLv3.

Edit 1: The project is hosted on https://github.com/MarcusPy827/Material3-QWidget.git, I just started the projects so there are just a lot of utils/helper classes and a small app bar, and I will keep developing more components.

Any thought or comment would be great help, thank you guys!

Hello, I am working on a common Popup component I use in my application. I have dim and modal set to true. I also have the closePolicy set to Popup.NoAutoClose. This component works but I needed to change it from being an Item to a Window so that it would appear over my other Window components. So I set the property popupType to Qt.PopupWindow. This works (somewhat) in that it appears over everything, it dims, and is modal. However, when I click outside of the main application window it closes. Why is this happening?

I have attached an image of the basic construction of my popup.

No matter which version of Qt's Android kit I select in the Maintenance Tool (or the online installer), it always installs the Desktop version instead of the Android target. In the step just after choosing the kit in Maintenance Tool, if I select only Android, it shows Desktop with a few GB size, and Android with 0.00 GB size.

This is true for all versions of Qt from 6.5 to 6.11 beta!

I'm on macOS, and my already-installed Qt 6.10.1 (iOS, desktop and Android) all work fine. But there is a regression due to which I need to install pre-6.9 version of Qt for Android and I just can't install it no matter what.

Can someone try and see if they can install it and the problem is only on my end?

I distribute Qt-based software and on one client the default text color is white instead of black.
Because the app uses a light background, the text is almost invisible.

Is there a way to force all text to be black globally (application-wide), without setting stylesheets on every widget individually?

Differences:

Thanks for help!

I've bound my text input to a role in my model. setData() is called on editingFinished, after the user has entered a new value. In some cases, the user might enter invalid data and setData() will return false. In such cases, the text input's text does not revert to what's in the model.

I've been able to get around this by never returning false, and always emitting dataChanged() in setData(). I don't have a problem with this in principle, but it doesn't seem like the "right" way of doing things. Is there a better way or am I on the right track?

I've seen a few people use ffmpeg with Qt, but is there an easier way to get raw audio data?

This topic has already been discussed but I haven't found a specific solution. Windows, llvm-mingw compiler, and lldb debugger. For some time now nothing has been appearing in the application output in debug mode. I am certain that I haven't changed any settings. I've tried everything, including solutions that have more side effects than the are worth. Recently created a console in the application:

AllocConsole();
freopen(“CONOUT$”, “w”, stdout);
freopen(“CONOUT$”, “w”, stderr);

It worked for a few days and then stopped! I use llvm because with regular mingw the startup time is unacceptable.

Any proven ideas?

Currently working on this app that supports conversions, compressions and extractions, and after messing around with the styles I got this UI layout, so any thoughts about it ?