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First of all, Qt version is 6.10.0, testing on Arch Linux rolling. I think I've found a bug in Qt but maybe it's just my fault. My program asks MariaDB database for some data and displays it in ...
Drobot Viktor's user avatar
  • 393
5 votes
2 answers
4k views

I have a rather big Map object and I want to have a separate list that has the keys sorted. This will be used in many other source files of my poject. The question is about how do I know when a ...
user202729's user avatar
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0 votes
0 answers
27 views

I have an issue: qrc:/qt/qml/MyApp/qml/MyApp/Main.qml:11:5: QML StackView: initialItem: qrc:/qml/pages/LoginPage.qml:-1 No such file or directory File tree Im strugling to see why it cannot find my ...
Ewald's user avatar
  • 1
0 votes
2 answers
477 views

Below is my desired folder structure : MyProject CMakeLists.txt include mainwindow.h src mainwindow.cpp main.cpp forms mainwindow.ui This is my desired folder ...
SweerItTer's user avatar
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5 votes
2 answers
113 views

I have a QColumnView with a QFileSystemModel attached to it, and I am trying to get information on what file is being hovered over in that model view. I do have mouse tracking enabled, however it ...
musicamante's user avatar
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Advice
0 votes
2 replies
54 views

If you're a hobbyist programmer like me, perhaps you have had need to build Qt6 from source so that you can include the proprietary codecs needed to play audio and video from web pages loaded through ...
Jeremy Wilson's user avatar
  • 97
2 votes
3 answers
7k views

I'm using QCalendarWidget in PyQt to find a single date that a user clicks on from a pop-up calendar. I'd like them to be able to select a range of dates- for example, the 12th to the 17th of November ...
BillyTheCode's user avatar
  • 1
1 vote
0 answers
560 views

How to create custom QTcpSocket class in QNetworkAccessManager? I want to write a simple client-server application, which will be communicate using HTTP protocol. It will be a simple http web server ...
Jason Aller's user avatar
  • 3,660
1 vote
0 answers
31 views

I already know that there are already a lot of questions abuot connecting signals from DBus to Qt. I've checked all of them and still I can't figure out what I'm doing wrong. I'm writing a simple ...
Toby Speight's user avatar
  • 32.3k
1 vote
0 answers
47 views

I wrote a simple example while learning QML and CMake. The main purpose is to demonstrate how to use `qt_add_qml_module` and how to register C++ classes in QML. the key code is as follows: **//...
J.W. Jevn's user avatar
  • 11
0 votes
0 answers
25 views

in the past I was able to compile QT with EGLFS on Raspbian Buster. I don't remember exactly how I did it, but it uses FKMS driver. Back then full KMS was not supported on Pi 4. I read that these days,...
Aros's user avatar
  • 181
1 vote
0 answers
525 views

【abstraction】 I am trying to finish a GraphCut segmentation program. Segmentation part is writtern in openCV and GUI part is written in Qt. Segmentation part works just fine. I have a problem in ...
Christoph Rackwitz's user avatar
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13 votes
2 answers
3k views

I'm using Qt to build an Android Qt Quick app. However, the base size is around 27 MB, which is huge for an initial size. How do I reduce this size?
CPPUIX's user avatar
  • 2,417
0 votes
0 answers
72 views

When using Qt and JKQtMathText to display LaTeX equations in a QLabel, I noticed a strange behaviour in the drawIntoPixmap() method. When the devicePixelRatio is set to one (the default value), the ...
Parisa.H.R's user avatar
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1 vote
2 answers
2k views

I want a clarification about SHIFT-JIS characters set. Is ASCII a subset of SHIFT-JIS character set similar to UTF-8. If a file has mix of SHIFT-JIS and ASCII. how can we read the same using QT ...
plugwash's user avatar
  • 11k
5 votes
1 answer
4k views

I'm trying to get FTP-SSL to work with Qt 4.6.3. I've already compiled Qt with OpenSSL support. Are there any good resources about FTPS with Qt? It seems that QFtp does not provide SSL support. I ...
halfer's user avatar
  • 20.2k
1 vote
1 answer
76 views

I have Qt 5.12.12 and Jenkins 2.440.1 on Windows. In my Jenkinsfile I have: stage('Test') { steps { echo 'Testing...' bat 'mingw32-make -f Makefile check' ...
llahteinen's user avatar
  • 323
Advice
0 votes
3 replies
147 views

In my code, I useing draw line to draw model selection line and error edge line ,useing draw triangle to draw 3D model. Using the model's openmesh handle, edges are recorded and drawn. ...
CroCo's user avatar
  • 5,879
2 votes
1 answer
11k views

I want to draw an image on a widget. I have no issue with drawing a pie or rectangle but I can't find anything on images. My code: void GraphicWidget::paintEvent(QPaintEvent * /* event */) { QPainter ...
user4157124's user avatar
  • 3,000
4 votes
1 answer
20k views

I tried to do: this->setStyleSheet("-webkit-box-shadow: 0px 0px 20px rgba(0, 0, 0, 1);") and I get the error: Unknown property -webkit-box-shadow. The same goes for box-shadow and -moz-box-shadow. ...
Community's user avatar
  • 1
86 votes
26 answers
243k views

I'm using Ubuntu 20.04 via Oracle VM Virtual Box and I faced exactly the same error as all other people. After building Qt6 source code using official Qt manual, I'm trying to run different projects ...
Rizzer's user avatar
  • 1,111
-1 votes
2 answers
469 views

When an object of QLabel subclass is active, how can one find if the mouse pointer is on the label and get its position if it is? QWidegt::event() can check the event type of QEvent::WindowActivate, ...
CPPUIX's user avatar
  • 2,417
Best practices
1 vote
1 replies
67 views

when user tap on a TextInput or TextField, the Android keyboard opens, but typing doesn’t insert any characters into the input field. They can only delete existing text, and new text cannot be entered....
Mohsen Kondori's user avatar
  • 80
4 votes
1 answer
68 views

I have a nested Item where I want to declare an enum. How can I access the enum from the parent Item? I dont want to declare the enum in the outer Item, because it belongs to the nested/inner Item. I ...
T3 H40's user avatar
  • 2,708
2 votes
2 answers
2k views

My webview function with the following code in my main.cpp : #include "mainwindow.h" #include <QApplication> int main(int argc, char *argv[]) { QApplication app(argc, argv); ...
user31869992's user avatar
  • 1
2 votes
1 answer
82 views

I have a SpinBox with a custom TextInput as contentItem. I want it to display a quantity, so it want to display something like "10 / 20 pc." for example. The minimum value is always 1, the ...
T3 H40's user avatar
  • 2,708
1 vote
1 answer
13k views

So, I checked the following questions, which seemed most similar to my existing problem: QML: Using cpp signal in QML always results in "Cannot assign to non-existent property" ...
Community's user avatar
  • 1
10 votes
3 answers
9k views

I followed the The Qt Resource System guide and the .ico icons appear on Linux. The icons are not showing up on Windows when I try to run the applicaton from Qt Creator. I suspect a plugin issue ...
studog's user avatar
  • 1,117
3 votes
1 answer
2k views

I am writing a server using QtHttpServer (from Qt6). It's time to implement chats for the system using web sockets, but it hasn't been added to Qt6 yet. I see two ways out – either use long-pulling ...
codeling's user avatar
  • 11.5k
0 votes
0 answers
42 views

I have been customizing QGroundControl and have successfully built it for my Ubuntu system (x86_64 architecture) using Qt 6.8.3. I utilized the provided shell scripts and Dockerfiles located in the ...
Yassin Rebai's user avatar
  • 3
0 votes
0 answers
42 views

What I want to achieve: I have created a custom page right before ComponentSelectionPage. On this page the user have to provide a key for the installation. Depending on provided key the ...
Sergej Leus's user avatar
  • 1
0 votes
1 answer
767 views

I have been trying to connect to a remote SQL database with Qt 6.5.2, using QtSql which came included with Qt. The SQLite driver (already installed) won't allow me to connect to a remote SQL database, ...
Atmo's user avatar
  • 4,262
1 vote
0 answers
64 views

I'm trying to use OpenCV with PyQt5 on Linux, but encountering Qt compatibility issues. When I install opencv-python, I get Qt platform plugin errors that prevent the application from starting. When I ...
musicamante's user avatar
  • 49.9k
-1 votes
1 answer
123 views

I'm trying to load images from my resources.qrc but it doesn't seem to work. For instance: cardVN1->setImage("://vn1.jpg");// The set image function is user-defined passing a QString ...
genpfault's user avatar
  • 52.3k
1 vote
0 answers
59 views

I'm embedding a VTK rendering widget inside a Qt 6 app using QVTKOpenGLNativeWidget. The window contains a QVTKOpenGLNativeWidget used for 3D rendering, wrapped inside a QFrame. On top of it, a ...
genpfault's user avatar
  • 52.3k
1 vote
0 answers
44 views

I'm getting some strange behavior in my Yocto build of PySide6. I've cloned the meta-qt6 layer (release 6.8) and I want to install PySide6. I found that I was getting a bunch of do_fetch errors ...
Camstillo's user avatar
  • 43
-1 votes
1 answer
3k views

I'm currently working with the PySide6 module.(vscode) But for some reason it doesn't work anymore,it worked before but it doesn't now. When I try to run my project this is the error I get: ...
Community's user avatar
  • 1
1 vote
1 answer
11k views

I am following this documentation for deployment. It need me to specify /path/to/Qt and /path/to/Qt/configure. I am unable to find the path to Qt on my machine. I am using Ubuntu 17 and I installed ...
Community's user avatar
  • 1
2 votes
1 answer
14k views

I am trying to build a basic Qt Application with the Meson Build System on my Mac (using macOS Sierra), following the tutorial on http://mesonbuild.com/samples.html. My meson.build file looks like ...
Community's user avatar
  • 1
0 votes
0 answers
42 views

when i try to use halcon api drawing roi in qt,i must use left click to end drawing.If i directly close the viewer of drawing roi,the whole program gonna be forzened,cause the drawing isnt ended.I ...
piercashuang's user avatar
  • 11
16 votes
6 answers
17k views

I want to use QTextEdit (in read-only mode) to show a clickable hyperlink, I used to do QTextEdit *textEdit = new QTextEdit; QTextCursor cursor(textEdit->document()); textEdit->setTextCursor(...
In Silmaril's user avatar
  • 1
1 vote
3 answers
141 views

I want to pass a QString into a lambda slot-function to modify it further. Unfortunately the QString goes out of scope before reaching the slot, so I cannot append text. How can I ensure that the ...
Marek R's user avatar
  • 40.3k
-1 votes
1 answer
2k views

I am attempting to convert the first code snippet at: Calculate distance between 2 GPS coordinates // var R = 6371; // km // var dLat = (lat2-lat1).toRad(); // var dLon = (lon2-lon1)....
genpfault's user avatar
  • 52.3k
4 votes
1 answer
15k views

Question: How to uninstall QT Creator from Linux machine? I have a corrupted install on a Debian Jessie machine. I have tried reinstalling, fixing, etc. and with no luck. I was advised to uninstall ...
Community's user avatar
  • 1
31 votes
4 answers
25k views

I have the same problem as described in Variables in Locals and Expressions not accessible in QT Creator but I want to find a way how to "repair" Qt Creator showing default composite types like std::...
PeliKalle's user avatar
  • 1
0 votes
1 answer
1k views

How can I set the audio output of a QMediaPlayer to a specific output in Windows 7 and later? This was really easy in PySide (using Phonon) but I can't find a way to do it in PySide2. There are some ...
noEmbryo's user avatar
  • 2,251
Best practices
1 vote
6 replies
225 views

I'm building a Qt wrapper for RtMidi. As starting point I created two separate classes QMidiOut and QMidiIn that wrap RtMidiOut and RtMidiIn. I don't want to duplicate code for the common methods (e.g....
duck's user avatar
  • 101
0 votes
0 answers
91 views

I have an application that still uses Openssl 1.1.1w. I need to update that to an OpenSsl 3 version. Switching to Qt6 seems like the best way to do that, however due to the nature of the codebase we ...
UnrealSteve's user avatar
  • 17
6 votes
2 answers
12k views

So I created a Qt project for Android, but whenever I try to build it I get that exception. I even tried to run the gradlew file in the command line with the same results. Wherever I look online it ...
Nicolas Filotto's user avatar
  • 45.2k
2 votes
1 answer
1k views

I need to pass the current time as milliseconds since unix epoch to a fragment shader in QML. I noticed that there is a built in shader uniform var called qt_Timestamp in the custom particle examples,...
Tomasz Kalisiak's user avatar
  • 156

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