View Full Version : QMdiArea + QwtPlot = Crash?

10th November 2008, 12:49

I´m using a QMainWindow with a QMdiArea.

When i add a simple QMdiSubWindow (with the line "setAttribute(Qt::WA_DeleteOnClose);" in the constructor) everything works.

But when I add a QwtPlot to this QMdiSubWindow and close this SubWindow my program crashes.

Visual Studio shows me an error somewhere in the file "free.c".

When I delete the line "setAttribute(Qt::WA_DeleteOnClose);" i can close the SubWindow without the crash, but my QMdiArea thinks that there is still an active QMdiSubWindow (logically).

Anybody knows this problem?

I have the same problem with any Qwt Widget in a QMdiSubWindow.

Thanks and greetings,

10th November 2008, 23:31
How do you add that plot to QMdiSubWindow?

1st January 2009, 13:39
After a long time i tried to solve my problem again - with success.
It works without any problem when i generate the code with the option "Multithreaded-DLL".