Question

I have the following source code:

    Processmethod()
{

    QDialog *ProcessMessage = new QDialog;      
    Ui::DialogProcessMessage Dialog;            
    Dialog.setupUi(ProcessMessage);             
    ProcessMessage->setModal(true);
    ProcessMessage->setAttribute(Qt::WA_DeleteOnClose); 
    ProcessMessage->show();



    PROCESSES START                     
}

After I want to show the QDialog “ProcessMessage” there are three QProcess processes included in three different following methods. If I disable these methods with // the popup window appears just fine, but if I enable the methods, the processes run fine, but the popup window does not appear. Any ideas/solutions ? greetings

Answer 1

Your window do not show until Process method is not return because main application loop implemented in main function

int main(int argc, char *argv[])
{
        QApplication a(argc, argv);
        QDialog w; // or other window
        w.show();
        return a.exec(); // main app loop (all drawing procedures called from here
}

So if you call your PROCESSES START nothing happened until Process method returns in QApplication::exec()

You can start your processes in separate thread and send progress notification to you dialog by implementing signals\slots in queued mode