Qt Forum - Recently Active Topics

Our forum is a bustling hub of activities for the mightiest minds in the universe. This page contains enough power to contain a list of topics within the past 24 hours.

  • [[qanda:topic_unsolved]] Cannot write to file: Unknown error after clean install of Qt

    [[qanda:topic_unsolved]] Cannot write to file: Unknown error after clean install of Qt

    I am using Qt Open Source and the default installer. I am trying to install the latest version and every time, the installer says it installed successfully without any errors but when I launch Qt...

    Read More
  • [[qanda:topic_unsolved]] Impossible to get true text hight with QFontMetrics/QFontMetricsF

    [[qanda:topic_unsolved]] Impossible to get true text hight with QFontMetrics/QFontMetricsF

    @Violet-Giraffe Try putting your font into italic and see whether it does not fit, horizontally? I'm thinking there might need to be a modification to textRect.left() too? leftBearing()? ...

    Read More
  • [[qanda:topic_unsolved]] Licencia

    [[qanda:topic_unsolved]] Licencia

    @U7Development said in Licencia: Hasta ahora he utilizado Qt Creator opensource, Una aclaración por las dudas. Qt Creator es un IDE (entorno de desarrollo) y Qt es un conjunto de bibliotecas...

    Read More
  • [[qanda:topic_unsolved]] Class and thread to manage debug output

    [[qanda:topic_unsolved]] Class and thread to manage debug output

    I am on Ubuntu 16 I first noticed this when I codded just four < 16 characters long test cout /cerr messages in a sequence. I have not paid much attention to what C++ I am using on Qt, I got...

    Read More
  • Check out our on-demand webinars. Maybe you'll find one of interest?

    View All
  • [[qanda:topic_unsolved]] QT background

    [[qanda:topic_unsolved]] QT background

    hello i done c++ basic learning and now i try to learn QT.., I want set background color or Image but if i put this: QPalette pal = ui->widget->palette; //pozadie...

    Read More
  • [[qanda:topic_unsolved]] Conditional borders on QTableWidget cells?

    [[qanda:topic_unsolved]] Conditional borders on QTableWidget cells?

    Sorry, perhaps I'm overlooking the obvious here, but "first call the base class and then redraw the lines" is exactly what I thought I was already doing in these lines: def paint(self,...

    Read More
  • [[qanda:topic_unsolved]] MariaDB plugin

    [[qanda:topic_unsolved]] MariaDB plugin

    @Christian-Ehrlicher But in the first post it clearly looks like he is only building plugin ?

    Read More
  • [[qanda:topic_unsolved]] Disconnect all incoming and outgoing connections from QObject-derived class manually

    [[qanda:topic_unsolved]] Disconnect all incoming and outgoing connections from QObject-derived class manually

    @Asperamanca Having had a good search around, you are not the only person to ask for this, and the answer has always been "It cannot be done". I think the latest request was...

    Read More
  • [[qanda:topic_unsolved]] Qt 5.8 and Boost 1.73, how or where to specify libraries?

    [[qanda:topic_unsolved]] Qt 5.8 and Boost 1.73, how or where to specify libraries?

    @SPlatten said in Qt 5.8 and Boost 1.73, how or where to specify libraries?: Qt 5.8 only supports compilers MSVC 2015 and MSVC 2013, not MSVC 2017. And what do you want to tell me with this?

    Read More
  • ×

    Ask us how our services team can shorten your time-to-market.

    First Name
    Last Name
    Company Name
    Your role
    Phone Number
    Country
    State/Region
    Send me news about Qt products and services.
    Check out our privacy policy.
    Our services team will be in touch soon.
    Error - something went wrong!
  • [[qanda:topic_unsolved]] Need help on deciding best approach

    [[qanda:topic_unsolved]] Need help on deciding best approach

    Hi @Allon, I more question. Having this map implementation in a C++ class and accessing information from the same using Q_INVOKABLE methods, is it a good idea? Or it is better to have the map...

    Read More
  • [[qanda:topic_solved]] Program crash because of OpenCV

    [[qanda:topic_solved]] Program crash because of OpenCV

    This topic helped, i checked my system variables and found that manual which i used for installing OpenCV mislead me, i added wrong folder(for x64 version) when i was aiming x32 OpenCV. Changed...

    Read More
  • [[qanda:topic_unsolved]] Load dynmic data into a ComboBox (Musescore, QML)

    [[qanda:topic_unsolved]] Load dynmic data into a ComboBox (Musescore, QML)

    @rowild said in Load dynmic data into a ComboBox (Musescore, QML): The idea is to assign this string later to the comboBox's model. You should directly be able to assign parts list to a ComboBox...

    Read More
  • [[qanda:topic_unsolved]] iOS Code Signing Error?

    [[qanda:topic_unsolved]] iOS Code Signing Error?

    Hi, I'm doing a mobile app. I've tested on Android, it's deploying ok, now I need to test on iOS. I've set up a VM with MacOS, installed USB network Gateway and my iPhone is recognized. I've the...

    Read More
  • [[qanda:topic_unsolved]] Build Qt 5.15.0 for x86 on x64 machine

    [[qanda:topic_unsolved]] Build Qt 5.15.0 for x86 on x64 machine

    Hi. how can I build Qt on an x64 machine for the x86 architecture? I use OpenSUSE

    Read More
  • [[qanda:topic_unsolved]] Including protobuf to Qt

    [[qanda:topic_unsolved]] Including protobuf to Qt

    @Ryna said in Including protobuf to Qt: conflict with Qt main function How did you got Qt installed/deployed in your machine? Are you sure Qt was also built with MS VS201x?

    Read More
  • ×

    Hit the ground running with the Qt Starter Pack. Ask us how.

    First Name
    Last Name
    Company Name
    Your role
    Country
    State/Region
    Phone Number
    Send me news about Qt products and services.
    Check out our privacy policy.
    We will contact you shortly.
    Error - something went wrong!
  • [[qanda:topic_unsolved]] QT-Creator and database on Raspberry3

    [[qanda:topic_unsolved]] QT-Creator and database on Raspberry3

    Hi, having just a problem to handle databases using qt-crerator 4.2.0 Based on Qt 5.7. I work on a small project which collects data from a WH1080 weatherstation on a raspberry3. Thanks to ovrheat...

    Read More
  • [[qanda:topic_solved]] Equivalent to boost::condition_variable

    [[qanda:topic_solved]] Equivalent to boost::condition_variable

    @SPlatten said in Equivalent to boost::condition_variable: @JKSH , so for example if I take: m_serverReadyCondition.wait(lock, [this]() { return m_serverReady; }); And replace with: while(...

    Read More
  • [[qanda:topic_unsolved]] QSerialPort::readyRead triggered twice on raspberry pi 4B if data larger than 16bytes

    [[qanda:topic_unsolved]] QSerialPort::readyRead triggered twice on raspberry pi 4B if data larger than 16bytes

    Yes, also, you can't rely on m_interFrameDelayMilliseconds interval for the non-real-time OS. So, even 3, 3.5, 4, or 5 msecs will be interpreted as same value. I'm not sure, that QTimer e.g. with...

    Read More
  • [[qanda:topic_solved]] Is distribution licensing cost really that huge for low volume embedded devices?

    [[qanda:topic_solved]] Is distribution licensing cost really that huge for low volume embedded devices?

    You're most welcome :) @loopyengineeringco said in Is distribution licensing cost really that huge for low volume embedded devices?: LGPL seems like a very viable route for me. Also as you...

    Read More
  • ×

    Watch how to advance application performance with Qt

    First Name
    Last Name
    Company Name
    Your role
    Country
    State/Region
    Phone Number
    What type of product are you developing?
    Send me news about Qt products and services.
    Check out our privacy policy.
    Thanks!
    Error - something went wrong!
  • [[qanda:topic_solved]] QSqlQuery &amp; SQLite rowid Question

    [[qanda:topic_solved]] QSqlQuery &amp; SQLite rowid Question

    @Crag_Hack said in QSqlQuery & SQLite rowid Question: Can you still reduce a database SELECT by rowid to a binary search without autoincrement? If you delete some rows in the middle does the lack...

    Read More
  • loading
    Loading More...