General and Desktop

@Mihir i think problem is in your gcc version. i also had that problem and i change my gcc version to gcc 9.5.0 sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa -y sudo apt install g++-9 gcc-9 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 80 --slave /usr/bin/g++ g++ /usr/bin/g++-11 --slave /usr/bin/gcov gcov /usr/bin/gcov-11 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 100 --slave /usr/bin/g++ g++ /usr/bin/g++-9 --slave /usr/bin/gcov gcov /usr/bin/gcov-9 sudo update-alternatives --config gcc and try again with configuration

@JacobNovitsky Well, connect a slot to https://doc.qt.io/qt-6/qabstractbutton.html#clicked and in that slot set the string in QLabel using https://doc.qt.io/qt-6/qlabel.html#text-prop

I reviewed the old code and added the following definition: #define Q_ARG_OLD(type, data) QArgument<type >(#type, data)

@JacobNovitsky said in How to include my project B with Project A: I believe I need to make some kind of Library? Yes, you can make the project you want to include a library. Or you can simply add the code of that project to your other project. It really depends what you want/need. See https://doc.qt.io/qt-6/sharedlibrary.html for shared libraries.

Thank you so much for sharing your answer it was very helpful to me again.

@hskoglund Actually in the linker message, one can see they are .so and Mac use .dylib.

@JacobNovitsky void MainWindow::on_pushButton_clicked() { QuickPaste* quickpaste=new QuickPaste(); quickPaste->setAttribute(Qt::WA_DeleteOnClose); quickpaste->show(); }

It's a tricky one. Since you added the Q_OBJECT macro to your subclass, you need to re-implement the paintEvent method to render your widget with style sheet support. #ifndef MATRIZ_H #define MATRIZ_H #include <QWidget> class QHBoxLayout; class Matriz : public QWidget{ Q_OBJECT private: QHBoxLayout* lay {nullptr}; public: explicit Matriz(QWidget* parent = nullptr); virtual ~Matriz() = default; void paintEvent(QPaintEvent *paintEvent) override; }; #endif #include "matriz.h" #include <QHBoxLayout> #include <QPainter> #include <QStyle> #include <QStyleOption> Matriz::Matriz(QWidget* parent) : QWidget(parent){ lay = new QHBoxLayout; setLayout(lay); //apply layout to this widget } void Matriz::paintEvent(QPaintEvent *paintEvent) { Q_UNUSED(paintEvent); QStyleOption option; option.initFrom(this); QPainter painter(this); style()->drawPrimitive(QStyle::PE_Widget, &option, &painter, this); }; On a side note, next time you post code, ensure that it properly builds.

@Kattia said in Problem with DPI and QIcon: what rect the QPainter path rect? The one you pass to QIcon::paint() and how do you multiply a rect? only its width/height? rect().size() * devicePixelRatio()

Not specifying selection-color made the text invisible for me so I had to set it to the same color as color: QSpinBox { color: white; selection-background-color: transparent; selection-color: white; } I didn't have to set any stylesheet for the QSpinBox's QLineEdit.

@jsulm Thanks!

I hase the same problem in python3.8 venv installation, assistant is located as .venv\Lib\site-packages\PySide6\assistant.exe and pyside6_qtdesigner lookfor .venv\Lib\site-packages\PySide6\bin/assistant.exe I use Python3.8.10 onWindows 10 Professionnel PySide6 vesion 6.5.2

@fabiopires10 In addition to @Abderrahmene_Rayene, the starting move is to set environment variable QT_DEBUG_PLUGINS to value 1 and then run your program. You can do that from a terminal/shell or from Qt Creator. Then look at diagnostic output, near the end where it is failing.