[Solved] Login dialog before mainwin

[DarkRoast]

Hi all

I am wondering how I can make a login dialog such that mainwindow wont start before the correct credentials are typed in. ie:

@int main(int argc, char *argv[])
{
QApplication a(argc, argv);

MainWindow w;

LoginScreen ls;
ls.show();

a.processEvents();

w.show(); // this should not show before LoginScreen is finished
ls.close();
return a.exec();

}@

How can I do this ?
How do I handle if the credentials are wrong, i.e show the LoginScreen again without the mainwindow showing ?

Thanks
DarkRoast

[loladiro]

"QDialog::exec ()":http://doc.qt.nokia.com/4.7/qdialog.html#exec
[quote]
Shows the dialog as a modal dialog, blocking until the user closes it. The function returns a DialogCode result.
[/quote]

[DarkRoast]

Thanks allot loladiro!