4.4.3 Windows - Missing MainWindow when starting Application on other machine

Hi,

i have an executable which works fine. When started it shows a MainWindow and a login (q)dialog (which prompts the user to enter username/password).
Everything works fine.

When i now copy the complete directory which contains the executable an all Qt DLLs + mingw DLL to another host which has not Qt installed, OR when i create an installer package (with nsis or installJammer)
and install it on another host the MainWindow does not appear if the executable is started....
Very strange......

I start the executable and only the login dialog comes up......After logging in (the dialog exec finishes) the MainWindow pops up....
How can there a different behaviour between host where it has been compiled and another machine?

Any ideas?

Marco

Can we see the code of your main()?

Hi,
sure....
here is my main:

Code:

---

int main(int argc, char **argv)
{
	    // Prepare log system
	    CConsoleLog *pConsoleLogger = new CConsoleLog;
 
	    std::string Prefix("test");
	    CFileLog    *pFileLogger    = new CFileLog(Prefix, false);
 
	    CLog::instance()->registerLogDevice(pConsoleLogger);
	    CLog::instance()->registerLogDevice(pFileLogger);
 
	    CLog::instance()->enableDEBUG(true);
	    CLog::instance()->enableMESSAGE(true);
            CLog::instance()->enableWARNING(true);
	    CLog::instance()->enableERROR(true);
	    CLog::instance()->enableFATAL(true);
 
	    QString Application (QString(Flightbook::APP_STRING) + " ");
 
	    FlightbookManager::instance().setApplicationTitle(Application);
 
 
	    LOG_MESSAGE("Starting " << argv[0] <<
            " compiled: " << __DATE__ << ", " << __TIME__);
 
	    QApplication App(argc, argv);
 
#ifdef WIN32
	    QApplication::setStyle(new QWindowsVistaStyle);
	//    QApplication::setStyle(new QWindowsStyle);
	#endif
 
 
	    QCoreApplication::setOrganizationName("TEST");
	    QCoreApplication::setOrganizationDomain("test123.de");
            QCoreApplication::setApplicationName("TEST APP");
 
	    QPalette Palette;
	    Palette.setColor(QPalette::Highlight,       QColor(1,1,255,200));
	    Palette.setColor(QPalette::HighlightedText, QColor(255,255,255));
	     App.setPalette(Palette);
 
	    App.setWindowIcon(QIcon(":/images/applicationicon.png"));
	    int ret = 0;		
	    {
 
	    MainWindow *pMainWin = new MainWindow;
	    pMainWin->show();
 
	    QPixmap Splash(":/images/splash.png");
	    QSplashScreen *pSplash = new QSplashScreen(Splash);
 
	    pSplash->showMessage(Application, Qt::AlignLeft|Qt::AlignBottom,
	                 QColor(255, 255, 255));
	    pSplash->show();
	    if(!pMainWin->initialize()) {
	        LOG_FATAL("Couldn't initialize, aborting...");
	        shutdown();
	        return 1;
	    }
 
	    pSplash->finish(pMainWin);
 
	    delete pSplash;
 
	    pMainWin->login("");
 
	    ret = App.exec();
 
	    delete pMainWin;
 
	    shutdown();
	    }
 
	    return ret;
}

---

In this code I can only see one window that has a chance of being visible - pMainWin. Which is the other one?

the main window:

Code:

---

class MainWindow : public QMainWindow
	{
	    Q_OBJECT	
....

---

and in the main.cpp the login method of mainwinow is called which creates the
login dialog (QDialog) :

Code:

---

bool
MainWindow::login(const QString &DefaultPilot, bool bInitialLogin)
{
    Flightbook::centerInDesktop(*this);
 
    if(m_pLoginDialog)
    {
    delete m_pLoginDialog;
    }
 
    m_pLoginDialog = new LoginDialog(DefaultPilot);
.....

---

So the login dialog always appears. Only the MainWindow isn't shown on virgin machins (with no Qt installed).....
After login winow finishes first time the MainWindow comes up...

nando

Do you use exec() or show() to show the login dialog?

Hi,

i use exec

nando

In that case you are probably suffering from QApplicaton::quitOnLastWindowClosed. Set it to false and see if it makes a difference.