Problem pausing the main thread

[franco.amato]

Hi to all,
I would pause the main thread for 2-3 sec and then exit from the application but I can not find a solution.

In my case when application starts a status dialog appears showing some result and then the main window is shown. There is a case where I would wait a couple of seconds ( to give to the user the time to read ) and then exit completely from the application. This is the code I wrote:

void CertiIrisApp::init() //CertiIrisApp is the main application derived class
{
    start = new StartDlg(0); // start is a dialog showing some initialization results
    start->show();
    start->print(QString("> Welcome to CertiIris")); //print prints a message
    processEvents();
    start->print(QString("> Checking for Iris scanner..."));
    if (checkIrisScanner())
    {
        start->print(QString("> Correct Iris scanner connected."));
        processEvents();
    }
    else
    {
        QString msg = "> An incorrect iris scanner has been connected, contact author.";
        start->print(msg);
        processEvents();
        Sleep(1); // I would wait to give the time to read
        QCoreApplication::exit(1); //and then exit
    }
 
    if ( connectToDB() == true )
    {
        QString str = "> " + QCoreApplication::applicationName() + " is successfully connected to the IrisServer.";
        start->print(str);
        processEvents();
        onLoadDBRecords();
    }
    else
    {
        QString str = "> " + QCoreApplication::applicationName() + " could not connected to the IrisServer.";
        start->print(str);
        processEvents();
    }
 
    start->hide(); // hide the dialog
    delete start; // and delete it
    m_mainWnd->show(); // here I show the main window
    return;
}

void CertiIrisApp::init() //CertiIrisApp is the main application derived class
{
    start = new StartDlg(0); // start is a dialog showing some initialization results
    start->show();
    start->print(QString("> Welcome to CertiIris")); //print prints a message
    processEvents();
    start->print(QString("> Checking for Iris scanner..."));
    if (checkIrisScanner())
    {
        start->print(QString("> Correct Iris scanner connected."));
        processEvents();
    }
    else
    {
        QString msg = "> An incorrect iris scanner has been connected, contact author.";
        start->print(msg);
        processEvents();
        Sleep(1); // I would wait to give the time to read
        QCoreApplication::exit(1); //and then exit
    }

    if ( connectToDB() == true )
    {
        QString str = "> " + QCoreApplication::applicationName() + " is successfully connected to the IrisServer.";
        start->print(str);
        processEvents();
        onLoadDBRecords();
    }
    else
    {
        QString str = "> " + QCoreApplication::applicationName() + " could not connected to the IrisServer.";
        start->print(str);
        processEvents();
    }

    start->hide(); // hide the dialog
    delete start; // and delete it
    m_mainWnd->show(); // here I show the main window
    return;
}

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The problem of my code is that the program flow doesn't wait at the Sleep call and follow showing the next message.
Where is my mistake?

Regards,
Franco

[mvuori]

Are you sure your Sleep() isn't a Windows API call in which case it sleeps only for one millisecond?

[franco.amato]

Are you sure your Sleep() isn't a Windows API call in which case it sleeps only for one millisecond?

Sorry I did a mistake writing the post.
The right code is Sleep(2000) but I don't know why I see the messages following the call to QCoreApplication::exit(1);
Before exiting the application the program execute some instructions that it shouldn't execute

[Lykurg]

Is reading the documentation so hard?

Note that unlike the C library function of the same name, this function does return to the caller -- it is event processing that stops.

So simple do:

QCoreApplication::exit(1);
return;

QCoreApplication::exit(1);
return;

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