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Qt Development

Everything development. From desktop and mobile to cloud. Games, tools, 3rd party libraries. Everything.
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  • This is where all the desktop OS and general Qt questions belong.
    83k Topics
    454k Posts
    B

    when you focus in a qtextedit and press, you see a small circular shaped zoom like a magnifying glass.
    how can I disable this as I dont like it at all ?
    I tried to filter out the events but it doesnt seem straightforward as I dont want to break everything

  • The forum for developing everything embedded: Linux, WinCE, Symbian, MeeGo... you name it.
    14k Topics
    62k Posts
    Q

    Any one know where this file can be found?

  • Looking for The Bling Thing(tm)? Post here!
    20k Topics
    77k Posts
    M

    I'm used to Qt widgets, and when you specify their properties with QSS, parent properties don't override the children properties, why isn't it the same in QML?

    For example, I want the parent and the child to have a different opacity value, but the parent's opacity overrides the child's opacity:

    Image { id: knightBackground opacity: 0 visible: true source: "assets/knight background.png" fillMode: Image.PreserveAspectFit Image { id: knightButton opacity: 1 x: 4 y: 3 source: "assets/Knight Button.png" fillMode: Image.PreserveAspectFit } }

  • Have a question about Qt Creator, our cross-platform IDE, or any of the other tools? Ask here!
    7k Topics
    35k Posts
    G

    Hi! I'm developing an app using pyside6-designer on MacOS. I have a pretty long page, so I have a scrollable area, which works fine in the preview mode. But when in development mode, I cannot scroll down to add a new field at the bottom. It works on Windows with exactly the same file. How can I fix this? Thanks!

  • Your Qt just doesn't want to build? Your compiler can't find the libs? Here's where you find comfort and understanding. And help.
    10k Topics
    51k Posts
    R

    Hello!

    I’m trying to run a Qt6 application that uses OpenGL inside a Docker container running Ubuntu 24.04, but I’m encountering issues with OpenGL rendering. Specifically, when trying to run an example from Qt6's OpenGL examples (2dpainting), I get the error:

    failed to create drawable failed to create drawable

    Additionally, there is a warning:

    QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'

    When running the 2dpainting example, I get a black screen with no rendering, but when I run openglwindow example for the OpenGL context, it successfully displays the object. There are other examples like: hellogl2, textures, cube... that don't work.

    58f67a96-7f22-4448-b72f-7d5600ba552e-image.png

    52ffdf55-df5e-4b3b-8908-95b8ca15b057-image.png
    In addition, after installing mesa-utils and running glxgears, the gears render perfectly.

    13f2a4ab-2a59-4016-aee2-7d26bf57c0fb-image.png

    Here are the commands I run, as well as the Dockerfile I created to test it.

    $ docker build -t ubuntu24-qt6 . $ docker run -it --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix ubuntu24-qt6:latest # Latest LTS Ubuntu ARG BASE_IMAGE=ubuntu:24.04 FROM $BASE_IMAGE # Unset to allow running qt interfaces. ENV QT_QPA_PLATFORM="" WORKDIR /home/ubuntu # install packages RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \ --mount=type=cache,target=/var/lib/apt,sharing=locked \ apt update \ && apt install -y --no-install-recommends \ qt6-base-dev \ qt6-base-examples \ && rm -rf /var/lib/apt/lists/*

    Could you help me get Qt6 and OpenGL working in a Docker container on Ubuntu 24?

    Thank you in advance.

  • What can we say - we like games. And you can use Qt to write some. Questions? Ask here.
    864 Topics
    4k Posts
    ?

    I added -x instead of x and It is working better.

  • Questions about Qt WebKit and related topics? Post here!
    2k Topics
    6k Posts
    SGaistS

    Hi and welcome to devnet,

    The first thing to do would be to update Qt. 5.7.1 has reached end of life a long time ago. Also, that outdated WebKit version is likely too old to support the modern JavaScript stuff.

  • Discussions and questions on QtWebEngine
    1k Topics
    4k Posts
    L

    did you able to fix the issue?

  • You're using Qt with other languages than C++, eh? Post here!
    861 Topics
    3k Posts
    SGaistS

    Glad you found out and thanks for sharing !

    How did you end up with two different versions of that library ?

  • Combining Qt with 3rd party libraries or components? Ask here!
    1k Topics
    6k Posts
    SGaistS

    Hi and welcome to devnet,

    Did you check in the maintenance tool that you installed that module ?

  • For discussion and questions about Qt for Python (PySide & Shiboken)

    3k Topics
    14k Posts
    SGaistS

    Hi and welcome to devnet,

    I think that you are looking for QGuiApplication::commitDataRequest.

  • Specific issues when using Qt for WebAssembly

    451 Topics
    2k Posts
    D

    Folks,

    I am trying Qt for WebAssembly as a pathfinder to a future solution. I did a build from source, where the source I have is Qt 6.4.3, and that seemed to work OK. I then took a simple GUI app I wrote in host (and checked it worked), did a distclean, copied it to a new directory, and then used qmake in where the wasm version was built.

    But when I did the make, compilation worked fine, but when it got to the link step (using wasm-ld), there was a whole slew of missing libraries (like -lpng) that I have no idea why they would even be needed, since I am using just buttons, labels, and text edits in the GUI. I was hoping a simple example with source might allow me to try that and see if it shows the same issues. Then I would wonder if I need to come here of the Emscripten forums for help.

    I did check the links in the pinned message, but one leads to a generic demos page whose WebAssembly link goes back to the top level Qt for WebAssembly doc page, and the other link just shows running apps, with no indication of where to find the source (include make settings in case that is the issue) for those apps.

    Thanks,
    Dale Pennington

  • Discussions and questions about Qt Quick Ultralite and using Qt on microcontrollers in general

    138 Topics
    458 Posts
    jsulmJ

    @Vishal-Biradar I don't know what tool is not found and why. Seems to be "Renesas Flash Programmer", but I don't know why it is not found. Maybe it needs to be installed and added to PATH?

  • The forum for discussing the Qt Digital Advertising Platform

    16 Topics
    40 Posts
    E

    @nayka Can I use QtDigitalAdvertising on PC applications? Or is it only allowed for use on Android or iOS mobile devices?

  • For discussion and questions about Qt Insight

    9 Topics
    12 Posts
    vicnguyenV

    Qt Insight 1.9 has been released. Qt Insight has new additions to the funnels and filters, allowing you to make deeper discoveries about your application usage. Two different funnel analytics, finer-grained geographic filtering options for regions, and many smaller improvements and bug fixes will enhance your insight.

    Read more details in the 1.9 release blog post.

  • tekojoT

    Forum general guide

    Pinned
    22
    13 Votes
    22 Posts
    18k Views
    kshegunovK

    @Nils-A said in Forum general guide:

    @AnneRanch seriously? That's five years ago, four years before you joined.

    Nor is it relevant to your question.

    @AnneRanch said in Forum general guide:

    This in not the place to make sermons or trying to push your social opinions.
    Here is a "how to " borrowed form another site

    This isn't "another site", this site has a code of conduct, which's been established, reviewed and approved by a number of people and it certainly isn't under debate in this thread. If you have a specific complaint about a specific person/post bring it to the attention of the moderators directly by flagging it/them.