how to restart my own qt application?

Question

i just asking myself how to restart my own qt application?

Can somebody please show me an example?

Answer 1

Doing a real process restart without subclassing:

QCoreApplication a(argc, argv);
int returncode = a.exec();
if (returncode == -1)
{
  QProcess* proc = new QProcess();
  proc->start(QCoreApplication::applicationFilePath());
}
return returncode;

Edit for Mac OS like earlier example.

To restart call

QCoreApplication::exit(-1);

somewhere in your code.

Answer 2

This slight variation on Rubenvb's idea works with PyQt. clearSettings is the method that triggers the restart.

class GuiMain

    #Most of implementation missing

    def clearSettings(self):
        #Clearing the settings missing
        QApplication.exit(GuiMain.restart_code)

    restart_code = 1000

    @staticmethod
    def application_main():
        """
        The application's main function. 
        Create application and main window and run them.
        """
        while True:
            app = QApplication(sys.argv)
            window = GuiMain()
            window.show()
            ret = app.exec_()
            if ret != GuiMain.restart_code:
                break
            del window
            del app