A couple of QT beginner questions, do I need to differentiate between QT for Python and PyQT?

Hi guys, relatively new to Python, and been sitting on the sidelines really with GUI development for python, some of the frameworks looked a little well not very modern, I have made something basic in Tkinter before. QT for python looks really cool after watching a freecodecamp course I'm pretty excited about the possibilites. QT for Python and PyQT seem to be fairly intermingled, I kind of like Qt for pythons licensing better, but how do I avoid getting the frameworks mixed up?

Also I dont seem to be able to find much in the way of tutorials on how to inter mingle python code with QT to make a personalised app, maybe I'm looking at it from the wrong angle?

​

Appreciate any help ;)

​

Brett

https://redd.it/18sry51
@qt_reddit

Border around GridLayout (QML)

I have a GridLayout containing several Labels and TextFields. I want to put a border around the grid with equal spacing around the edges so I've placed the grid inside a Rectangle and set the border I want. The problem is, by setting the grid's anchors to fill the parent, we end up with a gap at the top and the bottom. I can get by this by scaling the owning Rectangle to the grid's minimum size, but this has some undesired effects:


Rectangle {
Layout.preferredHeight: grid22.height
Layout.preferredWidth: 200
color: "transparent"
border.width: 1
border.color: "#3d3d3d"
radius: 5

GridLayout {
id: grid22
anchors.top: parent.top
anchors.margins: 15
columns: 2
rowSpacing: 15

Is there another way to set the Rectangle's size to match the grid's size, or perhaps a way to remove the spacing at the top and bottom?

https://redd.it/18sfqet
@qt_reddit

[Announce] Qt 6.2.7 Opensource released
https://lists.qt-project.org/pipermail/announce/2024-January/000466.html

https://redd.it/18wophn
@qt_reddit

CMake for Qt tutorial. Write CMakeLists.txt from scratch
https://www.youtube.com/watch?v=xs-b_bQIrtU

https://redd.it/18wrn4o
@qt_reddit

Why is the QT open source-> commercial license rules so strange?

What end user will want to, or even know how to replace the QT libraries? It seems weird to me that this is a requirement to use QT free license for a commercial app.

https://redd.it/18wysnc
@qt_reddit

QT UI Design Responsive without empty when we change the display resolution

Not able to auto adjust screen on different size screen resolution . Is there any way to achieve the responsive UI contents ??

Right side and bottom side space is keep on increasing when we change the resolution but UI have to resize and fit it into different screen resolution

https://redd.it/18y4igs
@qt_reddit

how to compile an old qt4 project with GitHub actions using windows?

I'm extremely sorry if the question sounds dumb, but i really need help with this and there is no answer online about that i can find, i've barely managed to compile my project on ubuntu

https://redd.it/1acxxv8
@qt_reddit

Google API in QML

How do I integrate Google map api into QML, I am having hard time getting the api key to give out the map inside my rectangle. It doesn't even show up. There will be different errors when I try diffferent methods. Can somebody help with this.
My intention is to simply, show the google map inside a rectangle with my current location and nothing more.

https://redd.it/1ac6e3t
@qt_reddit

Qt Creator "can't find any valid Kit".. except, there is a kit?

I was just about to get started with my first project on Qt Creator when I got the error stated in the title.

I installed Qt Creator 12.0.1 from the online installer/open source installer. I'm on Qt 6.6.1, PySide6 and Windows 11. I created the project using the Qt Quick project with Python option.

I checked and there is actually a kit getting auto detected. The correct version of Qt is also selected.

I honestly don't know what to do anymore. I uninstalled and reinstalled Qt Creator but that didn't do it either. I can provide screenshots and more information if needed.

https://redd.it/1abfsq6
@qt_reddit

I made a simple tetris clone using the QT Framework

Much of the design was inspired by FamTrinli on YouTube.

​

https://github.com/3r1cTEA/QT-Tetris/tree/main

​

https://redd.it/19fi1jc
@qt_reddit

Using custom fonts

Is it possible to change the QLabel font using the style sheet, but without installing the font on the computer, but using Res.qrc? C++/CMake

https://redd.it/19ern53
@qt_reddit

How to set value to model property in Qt Quick QComboBox in C++ during run-time from HTTP response

I want to populate the list of Dropdown box (QComboBox) from the Http response during run-time. Most of the internet resources suggests to use setInitialProperties() method in main() method.

This is my attempt: I have created my own model by sub-classing QAbstractListModel and I believe I've implemented all the required methods correctly. And then I set the model to the QComboBox QObject using setProperty() method.


class DataObject
{
private:
QString mtext, mvalue;
public:
DataObject(QString text, QString value);
const QString& getText() const;
const QString& getValue() const;
};

​

class DataObjectModel : public QAbstractListModel
{
QOBJECT
public:
explicit DataObjectModel(QObject *parent = nullptr);
// Basic functionality:
int rowCount(const QModelIndex &parent = QModelIndex()) const override;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
QHash<int, QByteArray> roleNames() const;
enum DataObjectRoles {
TextRole = Qt::UserRole + 1,
ValueRole
};
QINVOKABLE void push(const QString &text, const QString &value);
QINVOKABLE void print();
private:
QList<DataObject> mdataObjects;
};


During run-time, a slot is invoked after Http response is received and data is parsed and added to User-defined model. Then I'm trying to set that user-defined model to QComboBox like this :


DataObjectModel model;
foreach(...){
...
model.push(text,value);
}
QObject snapshotsDropdown = screen01RootQObject->findChild<QObject>("snapshotDropdown",Qt::FindChildrenRecursively);
if(snapshotsDropdown != nullptr){
snapshotsDropdown->setProperty("model", QVariant::fromValue(&model));
}

Problem : But the QComboBox shows empty list to select from. The drop-down list is not updated.

https://redd.it/19eo49s
@qt_reddit

Looking at CMakeLists for BasicDrawing Example

Folks:

I see the followinig in the CMakeLists.txt for the BasicDrawing Example:



settargetproperties(basicdrawing PROPERTIES WIN32EXECUTABLE TRUE MACOSXBUNDLE TRUE )

Does this mean that I cannot use this example on Linux?

Thank You
Mark Allyn

https://redd.it/19enbxa
@qt_reddit

Are these error messages when running qtcreator and qtdesignstudio normal for linux?

I performed qt web installer on Linux; started both creator and designstudio and I am getting these warnings/errors although tools appear to be running. Can I ignore these

===========================================================

Distributor ID: Ubuntu

Description: Ubuntu 22.04.3 LTS

Release: 22.04

Codename: jammy

&#x200B;

Please note that I am running wayland.

&#x200B;

Environment variables set up prior to running creator and designstudio:

&#x200B;

PATH="$PATH:/opt/Qt/6.6.1/gcc_64/bin:/opt/Qt/Tools/QtDesignStudio/bin:/opt/Qt/Tools/QtDesignStudio/qt6_design_studio_reduced_version/bin:/opt/Qt/Tools/QtCreator/lib/Qt/bin:/opt/Qt/Tools/QtCreator/bin:/opt/Qt/Tools/QtCreator/libexec/qtcreator/clang/bin:/opt/Qt/Tools/CMake/bin"

&#x200B;

export QT_QPA_PLATFORM=wayland

&#x200B;

&#x200B;

Running qtcreator error messages:

&#x200B;

aallyn@maallyn-geekcom:\~/scope-attempt/qt$ qtcreator

qt.core.qobject.connect: QObject::connect: Cannot connect (nullptr)::usageStatisticsNotifier(QString) to UsageStatistic::Internal::QmlDesignerUsageEventSource::handleUsageStatisticsNotifier(QString)

qt.core.qobject.connect: QObject::connect: Cannot connect (nullptr)::usageStatisticsUsageTimer(QString,int) to UsageStatistic::Internal::QmlDesignerUsageEventSource::handleUsageStatisticsUsageTimer(QString,int)

kf.syntaxhighlighting: Unable to resolve external include rule for definition "reStructuredText" in "CMake"

&#x200B;

&#x200B;

Running qtdesignstudio error messages:

&#x200B;

qt.qml.typeregistration: Invalid QML element name "DataType"; value type names should begin with a lowercase letter

SOFT ASSERT [08:19:58.574\]: "KitManager::isLoaded()" in /home/qt/work/build/qt-creator/src/plugins/projectexplorer/kitmanager.cpp:578

SOFT ASSERT [08:20:04.944\]: "false && "__cplusplus is not predefined, assuming latest C++ we support."" in /home/qt/work/build/qt-creator/src/plugins/projectexplorer/toolchain.cpp:451

kf.syntaxhighlighting: Unable to resolve external include rule for definition "reStructuredText" in "CMake"

PropertyEditor: invalid node for setup

qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile

"images/resourceLoader16.png" does not exist

"images/resourceLoader.png" does not exist

qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile

qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0

qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0

qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0

qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0

qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0

qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile

qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile

QFileSystemWatcher::removePaths: list is empty

QBasicTimer::start: QBasicTimer can only be used with threads started with QThread

QBasicTimer::start: QBasicTimer can only be used with threads started with QThread

QBasicTimer::start: QBasicTimer can only be used with threads started with QThread

QBasicTimer::start: QBasicTimer can only be used with threads started with QThread

QBasicTimer::start: QBasicTimer can only be used with threads started with QThread

&#x200B;

=========================================================

Thank you

Mark Allyn

https://redd.it/19elw9x
@qt_reddit

Creator + Docker + Resources = 💣

Has anyone tried to use a (working) CI docker container as build device for .pro projects?
As of QtCreator 12 it mostly works, but royally screws up file and resource paths, thus making development almost impossible, since cross-references and assets are not readily available as they do on a native environment.
What’s weird is that compiling works flawlessly through creator.
Any help?

https://redd.it/19egrpr
@qt_reddit

Is there any verification of qmlc files?

Does anybody know if the qmlc files (qml cache) are verified in any way to protect from tampering? Would it be possible for a malicious attacker to replace/modify these files?

https://redd.it/19ecflv
@qt_reddit

pyside5 Qt for Python in depth tutorial - Qt Group
https://www.youtube.com/watch?v=wOMlDutOWXI

https://redd.it/1ady1r7
@qt_reddit

Memory address of a Singleton instance is different when printed in C++ debug log and QML console log

Let's say I have created a singleton class in C++ to be used as QML type.

I tried to print the address of the singleton instance from C++ and from QML

qDebug() << this; // SingletonClass(0x2b0d98915c0)



console.log(SingletonClass); // qml: SingletonClass(0x2b0d41b7990)



What are the possible mistakes that could lead to this? Isn't it supposed to be the same address when printed?

https://redd.it/1ae3w6k
@qt_reddit

rhombus at end of each file

I am using qt creator12.01 in windows 11. At the end of each file, there is a rhombus mark.

Is there a way to not show this mark?

&#x200B;

https://preview.redd.it/4or9fc3akhfc1.png?width=789&format=png&auto=webp&s=37a575e8703bfa9cca9e4fc430b76a04c8b6f9f8

https://redd.it/1aed74x
@qt_reddit

Qt Creator 12.0.1 (Community) keeps crashing in Design mode

I can't even specify what I do to make it crash. It's like I'm playing russian roulette with Qt Creator. Every click is risky and it could crash at any point. I noticed it crashing more frequently when I go from an objects attributes tab to the code tab. My PC should be able to handle Qt Creator. It has 16GB of RAM and a decent CPU. My graphics driver is also up to date. I'm on Windows 11, installed Qt through the Online/Open Source Installer. All I could find about this problem online is that I need to disable the UpdateInfo Plugin, which I did but it's still crashing.

&#x200B;

Any ideas before I go completely insane? I've been at war with this stupid framework for over a week now and I'm considering using something else to create my GUI because this is getting ridiculous.

https://redd.it/1aep18u
@qt_reddit

Dowloading qt drivers for a flight software.

I have little to no knowledge when it comes to this stuff but I have been making a project that involves the use of ADSB data. The project is supposed to take the data it recieves from aircraft and display it on the software. The software I intend to use is called Stratofier. Well in the install portion of the software it says you need to have the qt drivers installed before the Stratofier software can be installed. I have a raspberry pi 4 and I have failed miserably at getting this to work. Any help would be appreciated.

https://redd.it/1aex8eb
@qt_reddit