Closing program when widget is closed.

[spirit]

if you use another thread then tyr to add one more connection in main.cpp

...
QObject::connect( qApp, SIGNAL(lastWindowClosed()), thread, SLOT(quit()) );
QObject::connect( qApp, SIGNAL(lastWindowClosed()), qApp, SLOT(quit()) );
...

...
QObject::connect( qApp, SIGNAL(lastWindowClosed()), thread, SLOT(quit()) );
QObject::connect( qApp, SIGNAL(lastWindowClosed()), qApp, SLOT(quit()) );
...

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