terminate a QThread from GUI

[OverTheOCean]

Hello guys,

I'm learning QThread with a simple application ... my thread start with a modified Run() function.

in the run(), l activate a QDialog, do some stuff and wait with exec() for the user to click on QPushbutton "Keep" or "close"

Thread_PulseMeas::Thread_PulseMeas(QObject *parent):
        QThread(parent)
{
    diag_RealTimePlot = new QDialog;
    ui_RealTimePlot.setupUi(diag_RealTimePlot);
    diag_RealTimePlot->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowTitleHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint);
    connect(ui_RealTimePlot.Close, SIGNAL(clicked()), this, SLOT(Close()));
    connect(ui_RealTimePlot.Add, SIGNAL(clicked()), this, SLOT(Add()));
};
 
void Thread_PulseMeas::run( Pulse_Meas *PulseMeas)
{
    diag_RealTimePlot->show();
    Pulse_measure(PulseMeas);
    exec();
 
}
 
void Thread_PulseMeas::Close()
{
    SetKeep(false);
    diag_RealTimePlot->close();
    exit();
}
void Thread_PulseMeas::Add()
{
    SetKeep(true);
    diag_RealTimePlot->close();
    exit();
}

Thread_PulseMeas::Thread_PulseMeas(QObject *parent):
        QThread(parent)
{
    diag_RealTimePlot = new QDialog;
    ui_RealTimePlot.setupUi(diag_RealTimePlot);
    diag_RealTimePlot->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowTitleHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint);
    connect(ui_RealTimePlot.Close, SIGNAL(clicked()), this, SLOT(Close()));
    connect(ui_RealTimePlot.Add, SIGNAL(clicked()), this, SLOT(Add()));
};

void Thread_PulseMeas::run( Pulse_Meas *PulseMeas)
{
    diag_RealTimePlot->show();
    Pulse_measure(PulseMeas);
    exec();

}

void Thread_PulseMeas::Close()
{
    SetKeep(false);
    diag_RealTimePlot->close();
    exit();
}
void Thread_PulseMeas::Add()
{
    SetKeep(true);
    diag_RealTimePlot->close();
    exit();
}

To copy to clipboard, switch view to plain text mode 

when l click "keep" or "close", the QDIALOG is closed but the thread is not terminated ....

am l missing something there ?

regards,

Michael

[tbscope]

How do you check if the thread is terminated?

[wysota]

You can't access GUI from threads!!!

[OverTheOCean]

from my main program where l started the thread with run() ... it is blocked at run()....if l replace exec() with quit() in the thread::run() ....it is okay but then l can not manage the signal Keep or Close in my thread

[OverTheOCean]

Wysota ...

my GUI is a just a QDIALOg l mange in the Thread ...seems to work well, eexcept to exit the thread when l use signal... l read around in this forum there is limitation on calling Signal in a thread, but it is not really clear to me !!

M.

[wysota]

from my main program where l started the thread with run()

Are you calling run() explicitly? Then you are not starting a thread. You should be calling start(), not run().

my GUI is a just a QDIALOg l mange in the Thread ...seems to work well, eexcept to exit the thread when l use signal...

Seems you don't have a thread at all. But if you did, your code would crash while trying to access the dialog.

[OverTheOCean]

hey Wysota,

well l reworked my code so the GUI is manage outside the thread and l update the GUI using Signal in the Thread...and now use Start() to activate the thread.

everything works as l want.

thanks for your help,

Michael