[Qt-interest] application won't terminate

[Ferenc Stelcz]

On 2010.01.03. 9:52 du., Ferenc Stelcz wrote:
> Ok, 3rd possible solution and then I'm going to sleep for today :) :)
>
> On 2010.01.03. 9:46 du., Ferenc Stelcz wrote:
>> Forgot the other (possible) solution:
>>
>> On 2010.01.03. 7:49 du., Kurtis Nusbaum wrote:
>>>
>>> Main function:
>>> int main(int argc, char *argv[])
>>> {
>>>        QApplication a(argc, argv);
> ++	 a.setQuitOnLastWindowClosed(true); //But this should already be set to
> true by default.
>>>        MainWindow w;
>>>        w.show();
>>>        w.checkPassword();
>>>        return a.exec();
>>> }
>>>
>>>
>>
>> --
>> Ferenc Stelcz
>> Ventyx Asset Suite 6 systems administrator
>> _______________________________________________
>> Qt-interest mailing list
>> Qt-interest at trolltech.com
>> http://lists.trolltech.com/mailman/listinfo/qt-interest
>>

Wow... after not having used Qt for more than a 3/4 of a year I forgot 
everything I knew.

So all of the 3 solutions won't work. Tried it with 4.5... :/

I have refactored your code a bit and I seem to finally have a working (or at 
least a workaround like) program:

MainWindow code:
bool MainWindow::checkPassword()
{
	bool retval = true;

         if(passwordHash.isEmpty())
	{
         	setupNewPassword();
         }
         else
	{
         	bool ok = true;

                 QString passwordInput = QInputDialog::getText(
			this,
			tr("Enter password"),
			tr("Password:"),
			QLineEdit::Password,
			QString(),
			&ok
		);

                 if(ok)
		{
                         QByteArray inputHash = QCryptographicHash::hash(
				passwordInput.toUtf8(),
				QCryptographicHash::Sha1
			);

                         if(inputHash != passwordHash)
			{
                                 QMessageBox::critical(
					this,
					"Error",
					"Incorrect Password"
				);

				retval = false;
                         }
                 }
                 else
		{
                         QMessageBox::critical(
				this,
				"Error",
				"Bad Password"
			);

			retval = false;
                 }
         }
	
	return retval;
}

Your main function:
int main(int argc, char *argv[])
{
	QApplication app(argc, argv);

	MainWindow w;
	w.show();

	if(!w.checkPassword())
	{
		return -1;
	}

	return app.exec();
}