@laozeng1982
Write a one program which just creates a QWIdget and show()s it before app.exec(). Try that. Find out whether no Qt program runs or whether it's something in your actual application.

@jsulm
void MainWindow::on_pushButton_clicked()
{
TestDialog *test = new TestDialog ();
test->setAttribute(Qt::WA_DeleteOnClose);
test->show();
}

#include "testdialog.h"
#include "ui_testdialog.h"

TestDialog::TestDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::TestDialog)
{
ui->setupUi(this);
connect(ui->pushButton_2,&QPushButton::clicked,this,&TestDialog::pushButton_2_clicked);
}

TestDialog::~TestDialog()
{
delete ui;
}

void TestDialog::closeEvent(QCloseEvent *event)
{
event->accept();
}

void TestDialog::pushButton_2_clicked()
{
this->close();
}
Does qt have requirements for computers? Computers with high configuration will not get stuck.

@jsulm @sierdzio Thank you both so much. I will try that out.

@camtheman99
That is interesting, thanks to @Christian-Ehrlicher.

Hi
alt text

@Asperamanca said in mapToGlobal, wrong values with Linux:

Yup that looks like it.

@ben-cottrell You should check the config.log file - it should give you more information about the issue (probably something is missing).

Ok, apparently the library did not contain much code. Adding more code it now correctly shows that it is a dynamic library also with ldd.

Also there is a new instruction for Rasp + Qt6:
https://wiki.qt.io/Cross-Compile_Qt_6_for_Raspberry_Pi

@mpergand thank you. "PlainText" fix it

And does qt_wrap_ui(SOURCES myUiGUI.ui) work (when SOURCES is your variable for your target, otherwise adjust it - please post your CMakeLists.txt)

Wops fixed https://doc.qt.io/qt-6/linux.html

sudo yum install mesa-libGL-devel

The PKG_CONFIG_PATH is an environment variable so you need to add it before running qmake.
So set it through Projects > Build Settings > Build Environment in QtCreator or set it through terminal before running qmake manually in terminal.

Screen Shot 1401-02-05 at 13.30.41.png

Then add following lines in your .pro file:

mac { #if you need to specify PKG_CONFIG = /usr/local/bin/pkg-config } #someone says this need in some Qt versions but not need in my Qt 5.12.12 QT_CONFIG -= no-pkg-config CONFIG += link_pkgconfig PKGCONFIG += protobuf \ grpc \ grpc++

I can't find a way to set environment variable in .pro file. Can you do it?

@RyanEdward Although not a native QTCreator solution, I use: C gist to simulate key presses on linux.
Mapping this binary to a keyboard shortcut on your native desktop environment can hack your way to a solution.

install g++ solved problem

Hi
https://doc.qt.io/qt-5/qtimageformats-index.html

The core Qt Gui library contains the code for JPEG so recompile is needed to get rid of it.

However, are you sure its a clash ? I mean the JPEG is wrapped into Qt and classes so
clashing with a free function seems unlikely.

@SGaist i just used an older version of qt(5.12 instead of 6.1.2), and it worked

Thank you .