Dialog closes immediately

Hello again,
I've got a strange one going on now. I have two dialogs that I open. I do so with the .exec() to make them modal. When I close the first one, I open the second one with .exec(). It immediately returns. I stepped into the Qt code and found that it does this because at line #153 of qeventloop.cpp, the d->threadData->quitNow flag is set. If I skip over the next line (return -1 ), it comes up just fine and functions normally.

I'm going to continue to search for what is going on, but if anyone has a clue, please let me know.

Thanks for all the help
- BRC

Do you happen to open those dialogs in main()?

Quote:

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Originally Posted by jacek

Do you happen to open those dialogs in main()?

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No - I've created a QObject based class with a slot that I call from main with QMetaObject::invokeMethod() call using Qt::QueuedConnection parameter. The first dialog comes up just fine (usually). But sometimes even the first dialog closes before I see it too. So, perhaps this is the problem. The support people at Qt told me to do it this way. Before I had all of the dialog calls in main().

The main application goes on to the app.exec() call.

- BRC

More information -
I can't even reopen the first dialog. It appears that there is some global variable that is getting set when I close the first dialog that causes all other dialogs to want to close as well. It's almost like I've set the system to close the entire application.

hmmmm - still researching.

- BRC

Quote:

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Originally Posted by bruccutler

No - I've created a QObject based class with a slot that I call from main with QMetaObject::invokeMethod() call using Qt::QueuedConnection parameter. [...]
The main application goes on to the app.exec() call.

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I see, but the solution is the is the same:

Code:

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int main( int argc, char **argv ) {
   QApplication app( argc, argv );
   app.setQuitOnLastWindowClosed( false );
   ...
   app.setQuitOnLastWindowClosed( true );
   return app.exec();
}

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QApplication::setQuitOnLastWindowClosed()

Quote:

---

Originally Posted by jacek

I see, but the solution is the is the same:

Code:

---

int main( int argc, char **argv ) {
   QApplication app( argc, argv );
   app.setQuitOnLastWindowClosed( false );
   ...
   app.setQuitOnLastWindowClosed( true );
   return app.exec();
}

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QApplication::setQuitOnLastWindowClosed()

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Thanks - I had just encountered that option and was going to see if it might be the issue. Thanks, I think this is what is happening.

BRC