How to show authorization window in c++ before main window?

Question

C++ / C#

It is necessary to show the authorization window before the main window. And if you click "Cancel" in the window or enter the wrong password, the application ends.
How I did it: I created an application class and a class for authorization. In the wxPanel authorization class constructor *panel = new wxPanel(this, wxID_ANY);
wxButton *button = new wxButton(panel, wxID_EXIT, wxT("Quit"),
wxPoint(20, 20));
wxButton *buttonOk = new wxButton(panel, wxID_OK, wxT("Ok"), wxPoint(20,50));
Connect(wxID_OK, wxEVT_COMMAND_BUTTON_CLICKED,
wxCommandEventHandler(AuthFrame::OnOk));
Connect(wxID_EXIT, wxEVT_COMMAND_BUTTON_CLICKED,
wxCommandEventHandler(AuthFrame::OnQuit));
From the application class, I create an instance of the AuthFrame authorization class. As a result, the main application window and the authorization window appear. How can I make it so that only the authorization window is shown and the result is passed to the main application class?
All this is done on ubuntu 12.04 using c++ and wxWidgets.

Answer 1

Here is the Qt code that does what you need:

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    AuthFrame askPassword;
    if (askPassword.exec() == QDialog::Rejected)
    {
        return 0;
    }
    MainWindow w;
    app.exec();
}

If you need to transfer something specific from AuthFrame to the main application, then do this:

if (askPassword.exec() == QDialog::Rejected)
    {
        return 0;
    }
    int result = askPassword.result();
    MainWindow w(result);